So just to be clear, set it up in stereo mode and just flip the switch to bridge?
Single input like in bridged mode but two speakers like stereo. Switch stays in bridged mode.
You are checking that the single input is driving both channels. You could also connect one speaker at a time if you feel better that way. The amp with play a mono signal..
Just a thought any chance you are connecting to the incorrect input. Both amps should be connected to input A
You are checking that the single input is driving both channels. You could also connect one speaker at a time if you feel better that way. The amp with play a mono signal..
Just a thought any chance you are connecting to the incorrect input. Both amps should be connected to input A
Yes, @Signal lost summed it up perfectly. It's just a test to see if both sides are operating as they should in RCA Bridged mode.
This was brilliant! So yes, the right channel is not working in the "weak" amp when in RCA bridged mode. I double checked the other amp and it's ok. SO, now the question is why? Any thoughts on where to look first?
SOLVED!!! After figuring out the right channel wasn't working in bridged mode, I traced the connections again and realized that I wired the resistor to the wrong side of the switch! My rookie mistake and I don't know how I missed it looking again and again at the switch wiring. But OMG they sound awesome!! Thanks everyone for their help! And thanks to Papa for a great little amp (and I'm a bit embarrassed that he had to weigh in on my noob mistake but grateful for his assistance to this DIY community!)
It took me a while to get back to the project, but the 1 ohm resistor was the culprit.
Thanks for your help! It sounds so much better having two instead of only one 🙂
wonderful. Thanks for the update.
I like Paul. But. It is alot of bullcrap swirling around. Well you know, what is hifi. Is this hifi?
This is absolutely top notch bitch slapping hifi! Totally un lossless:
Well, let me tell ya: If this does not make your sofa vibrate and feel like a part of the bass guitar, you are missing a fundamental part pf teh lovely musical good stuffz. 🥰
😁👍
”JeyDee here an other example, that grooves tooi like Hammond Organ.”
Oh yes it does!! 🙂
Hey everyone,
So I have had really no problems with these amps until yesterday, I have been modifying them of on the "ACA with premium parts" thread and everything has been great.
In my last disassembly/reassembly something happened, the boards were working fine, the bias is fine but the output sounded like it was shorted. I looked and I did have the positive speaker shorted to the back plate. I fixed that but the out put still sounds shorted, if I turn it all the way up I can hear a faint signal. Wiring is good, transistor are warm, bias is correct.
Any ideas, did I damage a part(s) by inadvertently running it with the output shorted?
I haven't had to diagnose anything beyond a simple wiring error before, thanks for any help or ideas that you may have!
So I have had really no problems with these amps until yesterday, I have been modifying them of on the "ACA with premium parts" thread and everything has been great.
In my last disassembly/reassembly something happened, the boards were working fine, the bias is fine but the output sounded like it was shorted. I looked and I did have the positive speaker shorted to the back plate. I fixed that but the out put still sounds shorted, if I turn it all the way up I can hear a faint signal. Wiring is good, transistor are warm, bias is correct.
Any ideas, did I damage a part(s) by inadvertently running it with the output shorted?
I haven't had to diagnose anything beyond a simple wiring error before, thanks for any help or ideas that you may have!
Can't say what you have done but a short is the one thing that should not do damage on an ACA.
The positive speaker terminal should be grounded. Have you measured the resistance between the two speaker terminals to make sure you have not got a short somewhere?
That's what I thought... I haven't tried measuring the resistance, what should it read? checking to make sure there isn't continuity?
It should read something higher than a short circuit. The big coupling cap means the reading could be anything... but not a short.