Using this pwr amp to power a berringer 8 channel mixer. Channel 2 was giving a weaker signal than channel one and then channel two stopped working all together. Had a professional sound shop work on amp and after a $200.00 charge the tech said he had to re sodder the connections in channel two. Got it home...hooked it up and now same exact problem on channel 1. What's the chances it's the same thing? Wouldn't a tech person charging $200 check out all the connections?
An expert who has achieved level 3 by getting 1000 points
An expert that got 20 achievements.
An expert that got 10 achievements.
An expert that got 5 achievements.
Re: QSC 1420 pwr amp
The weaker signal caused by leaky capacitor and change value resistor is need to replaced with a new one so it's works normal again. Your tech did is re soldering the cold solder he did not replaced some defected parts.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
The best way is to make a new cable and connect the tip and sleeve.
Thats the best way to run your QSC, then you're using the balanced input.
But thats only working when the rest of the system is also balanced (snake etc).
Offcourse you can use your instrumentcable, but that is unbalanced and you will loose some gain.
This is a very precise questions as QSC amp are pretty rare and high end electronics equipment. There is no way getting an answer other than getting the amp at a sound shop for repair, wich might go for a visit at QSC anyway. From a sound shop repairman...
A bit late, but I'll give it a try.
You can measure the outputsignal before the relay.
Often there's a coil, measure if you've got a DC level at that point.
If so, you're power amp is down.
Normally when the relay doesn't switch there's a DC level in your amp.
Stereo amplifier = two channel..A and B.
1. Make sure that your stereo audio mixer has an output from LEFT going to amp channel A and output RIGHT going to channel B.
2. Check that the "Pan" control on your audio mixer is set to the 12:00 position.
3. Inputs to mixer...make sure the music/microphone input channels "Pan" controls are also set for 12:00 as well.