Hi BOSE community - I wonder if I can have some technical advice please - I have a BOSE SA-5 installed to drive 2 pairs of all weather speakers. One pair on east side and one pair north side of my home. There are times when I want to use one pair, not both. I have a speaker switch from a reputable manufacturer and want to be able to isolate the A, or B or both channels. So this question is to the way the Amp inputs to the Switch. I thinking is - that the two wires for each of the and -ve wires from the (AMP) A and B circuits should be soldered and connected into the Switch. This then matches the input capacity of the switch. (my question is to the capacity of the Amp not the switch). Is there any way the Amp might be damaged by configuring the output as I have described, (I understand replies can't accept liabilities). Any thoughts appreciated. ( by the way - if this can't be achieved - then the switch is inadequate for the task)
What speakers do you use and what impedance are they rated?
The SA-5 can drive two speaker pairs of min. 8 Ohm each in parallel.
As per Bose's spec, I believe the Amp gets damaged when the actual impedance of the output is less than 4 Ohm.
Hi MusicLover - thanks for your question - yes each of the 4 speakers are 8 ohms (individually). Thank you. Richard
Then you should be fine if the two pairs each are wired in parallel when your switch is set to both groups. When only one group is selected the Amp will drive a speaker pair with 8 ohms impedance per channel - when both are selected, the impedance per channel will be 4 ohms. In both cases, the amp won't be damaged, according to its spec.
I've tried to illustrate that a little for the wires of the left speakers without knowing how your switch looks like.
/ o--------- GROUP 1 LEFT LEFT o______________/ o--------- GROUP 2 LEFT SA-5-AMP o--------- TO BOTH
Thank you for your care. If I can further here - the switch assumes the amplifier has a single pair output. SO the INPUT to the switch has just a left and a right Speaker capability. The exit from the switch is capable of supporting 2 pairs. So the problem is wiring the A and B outputs from the SA-5 into a single input to the switch. The swift can play A channel only, B channel only or A B.