Hi Eric, thanks for your comment! Hopefully one of our knowledgeable readers will be able to chime in with some insight on this. This is above my pay grade! Sounds like you will have to have knowledge of resitors.. Thanks Deacon! Is it possible to connect two speakers in parallel and then connect them to one speaker in series? I currently have two vintage speakers 8 ohms each connected in series for my center channel of a receiver that puts out 80 watts per channel at 8 ohms. So the vintage speakers combined in series are at 16 ohms and receive 40 watts 20 watts per speaker.
This seems to work fine. Is it possible to add a newer 4 ohms speaker to this center channel by connecting the two vintage speakers in parallel now with a combined resistance of 4 ohms and then connect these to the new speaker at 4 ohms in series.
In theory would this combine to make an overall resistance of 8 ohms? With the two vintage speakers receiving a max of 20 watts each and the new speaker receiving 40 watts? I have noticed that none of the diagrams online show this kind of configuration.
Thanks for your comment. Speakers are louder in parallel connection because, in parallel connection, resistance decreases. As the resistance decreases, the current will be more efficient, and basically current is music low impedance, and faster electric current passes mean the loudspeakers will be.
For example, if you have two speakers each have 8 ohms in parallel connection, the impedance will be four, and in series connection, it will be 16 ohms.
So 16 ohm not only makes the speaker quiet but also reduces the maximum power output of your amp. Furthermore, as the parallel connection has less impedance, the speakers will drive more power from the amp, which can lead to other problems.
In each, you need to be careful. One thing is clear in most cases: a parallel connection generates louder sound, but it also includes some drawbacks. So we will see the advantages and disadvantages of both series and parallel connections.
You probably already know in series connection, the impedance increased. On the other hand, in a parallel connection, the impedance decreased. This is why the spec sheet indicates this speaker to have an 8 ohm "nominal impedance.
Most of the speakers are available in alternative ohm ratings usually 4, 8 an 16 ohm versions. This variety allows for more flexibility in matching the overall equivalent impedance of your speaker s to the output impedance of the amplifier.
It is important that the output impedance of your amplifier matches the overall equivalent impedance of your speaker s for maximum power transfer and so that you do not damage the amplifier.
When using more than one speaker with your amp the equivalent overall impedance changes depending on how the speakers are wired. Speakers also have a wattage rating which indicates how much power from the amp they can handle before being damaged.
When you use multiple speakers, the output power from the amplifier will be distributed among the speakers. We recommend using speakers with the same ohm rating in multi-speaker cabinets so that the power is evenly distributed to each speaker. For guitar amplification, we recommend choosing a speaker rated for at least twice the maxiumum power it could experience from the amp.
In example 1, we have a 50W amp with an 8 ohm output impedance. When wiring speakers in series, you need to remember the following:. For example, when wiring multiple speakers to an amp in series, the power output at each channel is calculated using this formula:. Where Pr represents the amp power rating, Zr represents the amp output impedance, and Zt represents the load at each amp channel.
For example, if you have 4 speakers each rated watts, and the amp has an impedance of 8 ohms at each channel, and the total load impedance is 16 ohms, then you can calculate the power output as follows:.
As such, each amp channel will need to deliver watts to a load of 16 ohms. Then turn everything on. The switch box checks that the impedance is matching to avoid amp overload.
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