GAZ-53 GAZ-3307 GAZ-66

How to connect a car amplifier with your own hands. Parallel and Series Speaker Connections Speaker Connection Chart

Series, parallel and mixed speaker connection

The most important thing when connecting speakers is to make the connection so that neither speaker is overloaded. Overloading threatens to damage the speaker.

It is important to understand that the speaker can be supplied with power either less than or equal to the rated power for which it is, in fact, designed. Otherwise, sooner or later even the highest quality speaker will fail due to overload.

It is clear that before connecting the speakers you need to define them:

    Rated power ( W, W);

    Active resistance of the voice coil ( Ohm, Ω ).

All this, as a rule, is indicated on the magnetic system of the speaker, or on the basket.

1W means 1W, 4Ω is the resistance of the voice coil.

Speaker brand - 3GDSH-16. The first number 3 is the rated power, 3 W. Next to it is the signature - 8 Ohm, coil resistance.

Sometimes they don’t indicate it, but you can recognize it by the markings.

Midrange speaker 15GD-11-120. Rated power - 15 W, coil resistance - 8Ω.

Speaker connection. Example.

Let's start with the basics, so to speak - clear examples. Let's imagine that we have a 6-watt audio power amplifier (AMP) and 3 speakers. Two 1 W speakers (coil resistance 8 Ω each) and one 4 W speaker (8 Ω). The challenge is to connect all 3 speakers to the amplifier.

Let's look at an example first unfaithful connections of these speakers. Here is a visual drawing.

As you can see, the resistance of all three speakers is the same and equals 8 Ω. Since this is a parallel connection of speakers, the current will be divided equally between the 3 speakers. At maximum amplifier power (6 W), each speaker will receive 2 W of power. It is clear that 2 out of 3 speakers will be overloaded - those whose rated power is 1 W. It is clear that such a connection diagram no good.

If the amplifier outputted only 3 W of sound power, then such a circuit would be suitable, but a 4 W speaker would not work at full capacity - “filonil”. Although this is not always critical.

Now let's take an example of the correct connection of the same speakers. Let's use the so-called mixed connection (both serial and parallel).

Let's connect two 1-watt speakers in series. As a result, their total resistance will be 16 Ω. Now we connect a 4-watt speaker with a resistance of 8 Ω in parallel to them.

When the amplifier operates at maximum power, the current in the circuit will be divided based on the resistance. Since the resistance of a series circuit of two speakers is 2 times greater (i.e. 16 Ω), the speakers will receive only 2 watts of sound power from the amplifier (1 watt each). But a 4-watt speaker will use 4 watts of power. But it will work according to its rated power. There will be no overload with such a connection. Each speaker will operate normally.

And one more example.

We have a 4-watt audio power amplifier (UMZCH, also known as an “amp”). 4 speakers, the power of each is 1 watt, and the resistance of each is 8 Ω. A load with a resistance of 8 Ω can be connected to the amplifier output. You need to connect the speakers together so that their total resistance is 8 Ω.

How to properly connect the speakers to each other in this case?

First, let's connect all the speakers in series. What will we get as a result?

Since when connected in series, the resistance of the speakers is added, the result is a composite speaker with a resistance of 32 ohms! It is clear that such a connection scheme will not work. By the way, the same resistance (32 Ω) has the capsule of headphones - popularly called “plugs”.

If we connect such a 32 Ω compound speaker to the 8 ohm output of our amplifier, then due to the high resistance, little current will flow through the speakers. The speakers will sound very quiet. Effective matching between the amplifier and the load (speakers) will not work.

Now let's connect all the speakers in parallel - maybe this time it will work?

With a parallel connection, the total resistance is calculated using this tricky formula.

As you can see, the total resistance (R total) is 2 Ω. This is less than necessary. If we connect our speakers using this circuit to the 8 ohm output of the amplifier, then a large current will flow through the speakers due to the low resistance (2 Ω). Because of this, the amplifier may break down .

Parallel and series connection of speakers (mixed connection).

Well, if we use a mixed compound, we get this.

When the speakers are connected in series, their resistance is added up, we get 2 arms of 16 Ω each. Next, we calculate the resistance using a simplified formula, since we only have 2 arms connected in parallel.

This connection is already suitable for our amplifier. Thus, we matched the output impedance of the amplifier with the load - our composite speaker (speaker). The amplifier will output to the load full power without overload.

Options for load resistance when connecting speakers to an amplifier

To connect, for example, four speakers, you need to use one four-channel or two two-channel amplifiers for them. However, sometimes it is not possible to install another amplifier, and it is necessary to increase the number of speakers. For example, it may be necessary to connect four (2 per channel) or eight speakers (4 per channel) to the amplifier. In such cases, three connection methods are used: serial, parallel and combined (a mixture of the first two). The most important thing is to find out what the minimum allowable load resistance of the amplifier is and, based on this, choose the connection method.

Daisy chaining of speakers


In daisy chaining, the speakers are connected in series, one after the other. It is very important to phase the speakers correctly, connecting the plus of one speaker to the minus of the other. When connected in series, the total resistance increases and the output power decreases. This method can be used to reduce the output power of a channel that is supporting the sound of others - such as the rear or center channels. It is better to connect no more than two speakers in series, since more speakers will greatly reduce the output power. You cannot connect speakers to different resistance, for example, four- and eight-ohm, since in this case each of them will have a different volume. Only exactly identical speakers can be connected in series, because different speakers can also have different resistances in the 0.5 Ohm range.

When connected in series, the speaker impedance is calculated using the formula:

Where R is the resistance that we get as a result of such a connection, and R1 and R2 are the resistance of speakers 1 and 2. The resistance of more speakers is calculated similarly: R = R1 + R2 + R3 + ... + Rn, i.e. resistances are summed up.

The reduction in power due to increased load is calculated using the formula:

P = Preal (Rreal/Rcurrent),

Where P is the power at a changed load, Preal is the rated power of the amplifier at standard resistance, Rreal is the load resistance at which the real power of the amplifier was measured (rated load resistance), Rcurrent is the total resistance of the speakers that we obtained. This formula can be used for any of the three types of connection described, and with its help it is easy to calculate the increase or decrease in amplifier power due to non-standard load.

Parallel connection of speakers


By connecting speakers in parallel, the output power increases and the resistance decreases. When connecting two four-ohm speakers in this way, their combined impedance will be 2 ohms, and you need to know whether the amplifier can handle such a low load. Much more often you come across amplifiers that can operate normally at a resistance of 2 ohms than at 1 or 0.5 ohms.

Connecting a lower load resistance to the amplifier than its rated value may result in damage to the device.

You can calculate the resistance that will be after connecting the speakers in parallel using the formula:

R = (R1 R2) / (R1 + R2),

Where R is the load resistance for the parallel connection that we are looking for, and R1 and R2 are the resistances of the speakers that are connected in this way. For example, the resistance when connecting two eight-ohm speakers in parallel will be 4 ohms. When two speakers are connected in parallel, the output power of the amplifier for such a load will be twice as large.

Speaker combo connection


This connection diagram is used to obtain the required resistance for the amplifier. For example, in order to connect four speakers with a total impedance of 4 ohms. To calculate the load resistance using this connection method, use the formula:

R = (R12 R34) / (R12 + R34), where R12 is the total resistance of speakers 1 and 2, which are connected in series, and R34 is the same for speakers 3 and 4. If you have four 30-watt four-ohm speakers, then In such a connection scheme, the total power will be 120 W and the resistance will be the same 4 Ohms. And the power supplied from the amplifier will be equally divided among the four speakers.

Online calculator

http://www.rockfordfosgate.com/rftech#wiringwizard

Typically the basic configuration speaker system without any quirks it is able to satisfy all the needs of the average user. After all, the system is, as a rule, selected immediately for specific needs - for example, so that the power is enough to listen to music in a specific room. However, in some cases it may happen that the characteristics of the existing acoustics are no longer sufficient for the given operating conditions. Then the user begins to look for ways to upgrade the system at minimal cost.

Of course, the best option is progressive improvement - for example, replacing an old stereo pair with a modern multi-channel system. If financial capabilities do not allow you to buy a new expensive set of acoustic devices, it becomes interesting how to increase the number of speakers in the existing system. And here the question may arise: “Is it possible to connect another pair of speakers to the one already in use?” Answer: no, the speakers are not directly connected to each other. But with some reservations. In what situations can connecting speakers to speakers become possible?

Methods for assembling a speaker system

Strictly speaking, the speakers are connected to each other in any case - otherwise the integrity of the system would not be ensured, which is necessary to create uniformity and unity of the sound environment.

Connection details depend on the type of speaker system. It happens:

  • stereo – has two front speakers that receive a common signal from the two front channels;
  • multichannel – receiving a separate signal, one for each speaker.

In the first case, connecting the speakers to each other is either not required if different speakers are located in a common housing - for example, in the case of a tape recorder or radio, although this also occurs in conventional stereo pairs for a computer, or the speakers are connected by simply connecting the secondary device to the main one using a regular cable with 3.5 mm plug. Remember: the main column is the one on which the main outputs, controls and indicator lights are located. From the second there is only one wire coming off - the same one with which it is connected to the main one.

A multi-channel system can involve both direct and indirect connection of speakers. In the second case, the speakers are combined only through the receiver or the sound card of the sound source itself - a device that divides the common signal into separate channels. This scheme is used, as a rule, when using active-type columns. If the speakers are passive and an external audio amplifier must be used, the circuit becomes more complicated. Typically, in this case, special speaker cables with terminals are used, which, unlike plugs, are not connected to connectors, but to two separate terminals.

Like on a battery, the terminals have different poles - plus and minus, which should not be confused so as not to break electrical devices the first time they are plugged into the network. Any person should remember this from physics lessons. From there, you need to remember that electronic devices can be connected in two ways: serial or parallel. When connecting speakers to each other in this way, it is important to remember the need to match the electrical parameters - mainly the resistance indicator of all devices. The speakers must have the same impedance, and their sum should not exceed the impedance of the sound amplifier.

Series connection of speakers

As is known, when electrical devices are connected in series, their resistances are summed up. This property can be used to reduce output characteristics - for example, when connecting auxiliary speakers (rear or side), which do not require high power. As for the maximum number of speakers connected in series, this parameter should be calculated based on their own resistance. When summed up, the indicator should not exceed the maximum permissible resistance of the amplifier - most often it is 16 Ohms, a higher number is practically impossible to meet.

As the name of the method suggests, the devices must be connected one after another, forming a closed circuit. The wire from the positive terminal of the amplifier goes to the plus of the first speaker, the wire from the minus of the first column goes to the plus of the second, and the minus of the second is connected to the minus of the amplifier. Everything is extremely simple.

If more than two columns are connected, the circuit is exactly the same, only it has more steps. The main thing is to go from the plus of the amplifier to its minus, combining only opposite poles, with the exception of the beginning and end of the circuit.

In some cases serial connection– only possible variant. For example, you have two passive subwoofers with a resistance of 4 ohms and an amplifier with two channels of 100 W each. Such an amplifier, as a rule, cannot function if the signal supplied to it has a resistance of less than 2 ohms - this is exactly what it will be if the speakers are connected in parallel. However, when connected in series, the resistances of both subwoofers will add up, and as a result, a signal with a resistance of 8 ohms will be sent to each channel of the audio amplifier. This is an almost ideal indicator - the limit of 16 ohms is still far away, and there is no fear of device failure due to lack of resistance.

It is worth considering that when connecting several speakers to one amplifier channel, the maximum power of the amplifier is divided equally among all devices, taking into account the resistance. So, an amplifier with a power of 100 W and a minimum resistance of 2 Ohms will deliver 100:2:2 = 25 W to each of the two speakers.

When the speakers are connected in parallel, all manipulations with physical parameters occur in a mirror order: the resistance drops and the power increases. But the columns in this case are not directly connected to each other, so this point will be discussed in another article.

Knowing the intricacies of all the ways to connect speakers to each other and other participants in the speaker system, it is easy to accurately calculate all the real parameters of the devices used.

Many car owners without technical education do not know how to connect an amplifier to a car radio - for them it seems like too much of a time-consuming task. In fact, you shouldn’t rush to contact a car service center, since installing a car amplifier is not so difficult.

Maintenance by specialists will be expensive, so in order to save money, it is worth trying to understand the connection procedure, which this article will help with.

For high-quality operation of the amplifier you need:

  1. Give him good food;
  2. Give a signal from the radio. We looked at how to properly connect the radio;
  3. Connect speakers or subwoofer.

More details on how to connect the amplifier can be found below.

Good nutrition is the key to success

The amplifier connection procedure begins with the power wires. Wiring is the most important element of a car audio system; the volume and sound quality depend on it. Amplifiers need a stable power supply, otherwise the power will not be enough and the sound will become distorted. To understand why you need to pay attention to the quality of wiring and how it affects the sound reproduced by a loudspeaker, you need to know what a music signal is.

Some suggest that it represents a sine wave, however, the musical sinhala is characterized by a large difference between the normal and peak value. If sharp signal bursts are not important for car speakers, then in the case of an amplifier the situation is completely different. If the signal exceeds the permissible power for even a second (or even a millisecond), then these “anomalies” will be audible even to those who cannot boast of a good ear for music.

If the car amplifier is connected properly, the signal will flow through the wires undistorted. Carelessly done work or incorrectly selected wire cross-section will result in the sound being more compressed, rough and sluggish. In some cases, wheezing may also be clearly audible.

How to choose a wire cross-section?

Wire is the most common metal with a certain level of resistance. The thicker the wire, the lower the resistance of the wire. To avoid sound distortion during large voltage fluctuations (for example, when playing powerful bass), you must install the correct gauge wire.

It is worth noting that the cross-section of the positive cable should not be larger than the negative one (the length does not matter).

An amplifier is considered to be a rather electrically intensive device. For his efficient work High-quality grounding is necessary to be able to receive the necessary energy from the battery.
To choose the correct wire cross-section, you need to make some calculations. First, look at the instructions for the amplifier (or directly at the box from the manufacturer, if there is no documentation, use the Internet) and find the rated power value (RMS) there. Rated power is the signal power an amplifier can deliver over an extended period of time to one channel of 4 ohms.

If we consider four-channel amplifiers, they usually have a power of 40 to 150 watts per channel. Let's say that the amplifier you purchased produces 80 watts of power. As a result of simple mathematical operations, we find out that the total power of the amplifier is 320 W. Those. How did we calculate this? It’s very simple to multiply the rated power by the number of channels. If we have a two-channel amplifier with a rated power (RMS) of 60 W, then the total will be 120 W.

After you calculate the power, it is advisable to also determine the length of the wire from the battery to your amplifier and you can safely use the table to select the required wire cross-section. How to use the table? On the left side the power of your amplifier is indicated, on the right you select the length of the wire, go up and find out what cross-section you need.

The table shows the cross-sections of copper wires, remember that a large number of sold wires are made of aluminum coated with copper, these wires are not durable and have more resistance, we recommend using current copper wires.

Fuse selection

In order to secure the connection of the car amplifier, it is necessary to protect the power supply from the battery to the amplifier using a fuse. Fuses should be placed as close to the battery as possible. It is important to distinguish between a fuse that protects the device itself (whether it is an amplifier or a radio) and a fuse installed on the power wire.

The latter is needed in order to protect the cable itself, since a considerable current flows through it.
Make sure that the fuse ratings match, as if the wiring fuse rating is too large, the result will be short circuit The wire may burn out. If the rating, on the contrary, is less, then the fuse can easily burn out at the time of peak loads and then there will be no other choice but to buy a new one. The table below shows the wire cross-section and the required fuse rating.

Connecting interconnect wires and control (REM)

To lay the cable, you need to find the linear output on the radio. The linear output can be recognized by the characteristic “bells” that are located on the rear panel of the radio. The number of line outputs differs depending on different models radio tape recorder Usually there are from one to three pairs. Basically they are distributed as follows: 1 pair - you can connect a subwoofer or 2 speakers (labeled as SW\F) If there are 2 pairs of them, you can connect 4 speakers or a subwoofer and 2 speakers (outputs are labeled F and SW), and when there are 3 pairs of linear ones on the radio wires you can connect 4 speakers and a subwoofer (F, R, SW) F This is Front i.e. front speakers, R Read rear speakers, and SW Sabwoorer I think, and so everyone understands what.

Does the radio have no line outputs? Read the article "".

The connection will require an interconnect wire, which should never be skimped on. It is prohibited to lay the interconnect cable near the power wires, as various types of noise will be heard when the engine is running. You can run the wires both under the floor mats and under the ceiling. The last option is especially relevant for modern cars, in the cabin of which there are electronic accessories that create interference.

You also need to connect the control wire (REM). As a rule, it comes with interblock wires, but it happens that it is not there, purchase it separately; it does not need to be of a large cross-section - 1 mm2 is quite enough. This wire serves as a control for turning on the amplifier, i.e. when you turn off the radio, it automatically turns on your amplifier or subwoofer. As a rule, this wire on the radio is blue with a white stripe; if it is not there, use a blue wire. It is connected to the amplifier to a terminal called REM.

Amplifier connection diagram

Connecting a two-channel and four-channel amplifier

We have combined this section because these amplifiers have a very similar connection diagram, one might even say more simply, a four-channel amplifier is two two-channel ones. We will not consider connecting a two-channel amplifier, but if you figure out how to connect a four-channel amplifier, then you will not have any problems connecting a two-channel amplifier. Most car enthusiasts choose this option for their installations, since this amplifier can connect 4 speakers, or 2 speakers and a subwoofer. Let's look at connecting a four-channel amplifier using the first and second options.

Connecting a 4-channel amplifier to a battery is recommended using a thick cable. How to choose the right power wires and connect the interconnects, we discussed all this above. Amplifier connections are usually indicated in the manufacturer's instructions. When an amplifier is connected to an acoustic system, it operates in stereo mode; in this mode, this type of amplifier can operate under a load of 4 to 2 ohms. Below is a diagram of connecting a four-channel amplifier to speakers.

Now let's look at the second option, when speakers and a subwoofer are connected to a four-channel amplifier. IN in this case the amplifier operates in mono mode, it takes voltage from two channels at once, so try to select a subwoofer with a resistance of 4 ohms, this will save the amplifier from overheating and going into protection. Connecting a subwoofer will not be a problem; as a rule, the manufacturer indicates on the amplifier where to get the plus to connect the subwoofer, and where to get the minus. Take a look at the diagram of how to bridge a 4-channel amplifier.

Connecting a monoblock (Single channel amplifier)

Single-channel amplifiers are used for only one purpose - connecting to a subwoofer. A notable characteristic of amplifiers of this type is increased power. Monoblocks are also capable of operating with resistances below 4 ohms, which is called a low-impedance load. Monoblocks are classified as class D amplifiers, and they have a special filter for cutting frequencies.

Installing a single-channel amplifier will not require much effort, since its connection diagrams are very simple. There are only two outputs - “plus” and “minus”, and if the speaker has only one coil, then you just need to connect it to it. If we're talking about When connecting two speakers, they can be connected either in parallel or in series. Of course, you don’t have to limit yourself to just two speakers, but before you connect the amplifier and subwoofer to the radio, will the latter cope with a high level of resistance?

Video on how to properly connect a four-channel and single-channel amplifier

We hope that this article helped you understand how to properly connect car amplifier. Rate the article on a 5-point scale; if you have any comments, suggestions or you know something that is not indicated in this article, please let us know! Leave your comment below. This will help make the information on the site even more useful.

If you are building a loud front with a large number of speakers, then you will have to connect them together in order to connect two or more speakers to one amplifier channel. Of course, no one puts one din per channel, it’s just expensive.

If, for example, you install 4 pairs of speakers, of course it is better to connect them in pairs, it will be more reasonable, and the power will be higher, and you will need one 4-channel amplifier. As long as the total resistance of the dins connected in parallel to one channel is not less than the tolerance (for example, 2 Ohms or 1 Ohm), everything is fine. But when they want more speakers, people start combining switching methods. For example, four 4-ohm speakers are switched in series in pairs and the pairs are connected in parallel. The total resistance is 4 Ohms, 4 speakers are connected per channel. Everything seems to be fine. And to make things really good, another 4-ohm speaker is switched in parallel, then the total resistance is 2 ohms and 5 speakers are connected to each channel.
There are also more witty combinations. For example, three speakers are placed on a channel. One 8 ohm, and two 4 ohm. The four-ohm ones are connected in series and an eight-ohm one is connected to them in parallel. The sum is again 4 Ohms, from a mathematical point of view everything is fine.

But there are nuances. The trouble is that the power between the speakers is not distributed evenly. Some are overloaded, others are resting.
To figure out what's what here, you need a little math.
Let's say that we have two speakers with resistance R 1 and R 2 and they are both connected to the same amplifier channel in series or parallel. The amplifier power P will be distributed between the speakers:

P=P 1 +P 2

where P 1 and P 2 are the powers that “arrive” on the dynes.
What is the ratio of these powers? How different can they be?

Serial connection

If the speakers are connected in series, then a total current flows through them. The power dissipated by them will be I 2 R 1 and I 2 R 2, respectively

P=I 2 R 1 +I 2 R 2

where I is the total current flowing through both speakers.

From the last equation it is clearly clear that the power will be dissipated more on the dyne that has greater resistance. That is, if we connect an 8-ohm and a 4-ohm speaker in series, the 8-ohm speaker will be loaded more. This sounds strange to many, but it is true. Therefore, I would categorically not recommend connecting speakers with different resistances in series. In fact, only one will work.

What happens if the speakers have the same impedance? In theory, the power should be distributed evenly. But there is one thing that is almost never written about - the reactive component of the total resistance. The impedance is not constant, it depends on the frequency of the signal supplied to the speaker coil. As the frequency increases, the impedance increases, and the inductance of the voice coil is to blame. Everyone knows this.
But there is another component of impedance that is very important and never mentioned. The fact is that a speaker is not just a coil with inductance, it also moves in a magnetic field. Essentially, any speaker of a popular design is a reciprocating electrical machine. Electric motor. Like almost all electric machines, it is reversible. This means that during operation the speaker generates some EMF which is expressed in an increase in impedance - total resistance. The greater the amplitude of the oscillations, the greater the total resistance will be. The increase in impedance is not large over almost the entire audio range and does not have a noticeable effect. Apparently that's why they don't remember her. But near the speaker's natural resonant frequency, the magnitude of the back-EMF is so large that the associated increase in impedance can be 10-20 times greater than all other components of the impedance.

Look at the picture. It shows the real impedance characteristic of the Oris GR-654 speaker. At the resonant frequency its total impedance is 48 ohms. This is simply a colossal amount. It is more than 10 times the total resistance over the operating range.

Why did we talk about this phenomenon at all?
The fact is that when you buy a pair of speakers, they are the same only formally. In fact, the speakers, even taken out of the same box, are slightly different. In some places the coils are a couple of turns larger, in others the movement is a little harder or softer, etc. In any case, the dynamics will oscillate with different amplitudes. Then one will have more resistance than the other. The power will not be distributed evenly. And if the speakers operate near resonance, and this is almost always the case, the situation will not be pleasant at all. The speaker with more resistance will be loaded more. A little. The vibration amplitude of its diffuser will be slightly larger. Accordingly, the resistance will increase even more, which will further increase the imbalance in power, which will increase the resistance even more, and so on. But we remember that near resonance the resistance can increase 10 times. One of the speakers will take care of everything. This results in a classic version of a system with positive feedback. One of the speakers will quickly overload, while the other will rest. There can be no talk of normal sound. You will have to “cut” the dynes at frequencies significantly higher than the resonance frequency.
In general, I would not recommend connecting speakers in series. With midrange drivers and tweeters this still works out somehow, but with subwoofers it’s a problem. They always operate in an area of ​​strong impedance unevenness. Therefore, if two speakers are connected in series (namely speakers, not coils of one speaker, this is important), only one works and is quickly overloaded, and the second dangles like a passive radiator. I have never seen a normally working subwoofer with two speakers connected in series. Even by eye it is clear that their diffusers do not vibrate in phase. This is often attributed to the wrong case, although it has absolutely nothing to do with it.

The attached video clearly shows how two Oris LW-D2.12 speakers connected in series work completely at odds. Not in antiphase, as it might seem at first glance, but out of tune. This is due to the fact that with large oscillation amplitudes, a large imbalance in the load between the speakers develops.

Parallel connection.

If the speakers are connected in parallel, the currents flow through them are different, but the signal across them is exactly the same. Therefore, the power distribution equation can be written in another form:

P=U 2 /R 1 +U 2 /R 2

where U is the signal supplied to the speakers.

This equation shows that the lower the speaker impedance, the more power it dissipates. If you connect an 8-ohm and a 4-ohm speaker in parallel, the 4-ohm speaker will be loaded mostly. The other will be in a relaxed state.

If we connect speakers with the same impedance, the power distribution between them will be completely different. Here there will be a classical system with negative feedback. That is, the greater the resistance of the speaker, the less power will be dissipated on it. The system will operate absolutely stably, the power will be distributed almost equally. You can even turn on speakers of different sizes from different manufacturers, and there will be no imbalance.
Generally parallel connection the best option for any speakers. The only one for subs.

Should I combine parallel and serial connections?

I would not recommend it, especially if speakers with different resistances are connected. For example, if you connect two 4-ohm speakers in series and another 8-ohm speaker connected to them, the power will be distributed extremely unevenly across them. At best, 50% for 8-ohm, and 25% for 4-ohm.

In principle, it is possible to connect speakers in series/parallel with the same resistance, but it is worth remembering that there can be a large imbalance in power between those connected in series.

How to connect speakers?

Definitely in parallel, and everything will be fine for you. Speakers of any type and in any quantity should be connected in parallel, if of course it makes sense. Of course, the total resistance must be within the tolerance of the amplifier. It is worth connecting more than two speakers per channel only in this case. if you really powerful amplifier, 500 or more W per channel. No matter how you connect the speakers, the amplifier's power will be distributed across them. And if your amplifier has 100-150 W, you shouldn’t expect much output. Two dynes in parallel - that's all it will be. And the output will be noticeably higher, and you will get everything out of the amplifier.