4 channel speaker selector

[itawad]

Dear Experts

I bought a stereo receiver Sony 2-Channel Stereo Receiver (STRDH100), with 100 W per channel. With it I have a speaker selector (4Channel) to power 2 stereo rock speaker and 2 polks atrium 45 (outdoor).

My Question: on the back of the receiver, the output is 2 channels (R &L each with - & +), while the input on the back of the selector is only 1 channel (R &L each with - & +).

How will I connect??

Appreciate your reply as always
Imad

 

[TLS Guy]

Dear Experts

I bought a stereo receiver Sony 2-Channel Stereo Receiver (STRDH100), with 100 W per channel. With it I have a speaker selector (4Channel) to power 2 stereo rock speaker and 2 polks atrium 45 (outdoor).

My Question: on the back of the receiver, the output is 2 channels (R &L each with - & +), while the input on the back of the selector is only 1 channel (R &L each with - & +).

How will I connect??

Appreciate your reply as always
Imad

You don't need the selector. You have A + B outputs on your receiver. However both A + B outputs use the same amplifiers. So you can only use one set of speakers at the same time, otherwise the impedance will be too low.

Connect one set of speakers to A outputs and the other to B.

You speaker selector just replicates your A + B switches on your receiver and is redundant.

 

[itawad]

Thank you TLS Guy

I have 3 sets of stereos speakers (2 rock stereo) and 2 polks (L & R).
If I power for example the 2 rock through the receiver, what about the Polks?

Imad

 

[TLS Guy]

Connect A to one set of speakers. Connect B to the switch and the other two sets to the switch.

Remember only run one set of speakers at a time.

 

[itawad]

Thanks again
Why you only need to run one channel at a time?

If I hook the 3 pairs to the switch which is powered by either channel A or B, that should be OK to turn them on all at the same time without overloading the amplifier?

itawad

 

[TLS Guy]

Thanks again
Why you only need to run one channel at a time?

If I hook the 3 pairs to the switch which is powered by either channel A or B, that should be OK to turn them on all at the same time without overloading the amplifier?

itawad

There is only one amplifier for each left and right channel. The A/B switch is AFTER the amps.

If you run all the speakers they are in parallel and you will have a very low impedance and blow your receiver for sure.

If you want to run all speakers, then you will need an impedance matching selector, or impedance matching volume controls in the end locations.

You do not understand the circuit at all and how to figure the impedance of your coupled speaker loads.

Just remember your receiver is two channel and not four. You have a right amp and a left amp. If you run three sets of speakers, you have three speakers in parallel connected to each of the two amps, which will spell disaster.

 

[itawad]

Thanks for the reply, I'm just learning, excuse my shallow knowledge.

Glad that I have 3 impedance matching volume controls at the end and pretty sure the selector is also impedance matching.

Regards
itawad

 

[itawad]

One more question,

with the impedance protection volume control:
1. do you activate the protection on the speaker selector?
2. How high you put the volume on the main receiver.

thanks
itawad