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I have a soundtech 306d I think i put a bad lead in it and it no longer works on the channels but does as an amp with a phone into the amp input Is there a cut out or have i blown something

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 979 Answers

SOURCE: I think my amp is broken

Finals/outputs are toast. Get it serviced to get back to sweet music...accordianman

Posted on Mar 09, 2008

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SOURCE: Amp no longer turning on

Do the speakers push out or pull in when power is applied?

If not, how did you determine that is has DC on the speaker outputs?

Posted on Oct 05, 2008

ghoff1
  • 167 Answers

SOURCE: blown input channel

impedance could be an issue, have you tried new drivers? downloaded from creative labs. and try other input sources,other than the one you are using. tape,mp3 player,ect. and make sure the levels are set(play around until you get the desired level.also try new cables if you still have trouble. hope this helps.good luck! glen

Posted on Feb 19, 2009

97F350diesel
  • 1326 Answers

SOURCE: i think one of my channels blown how can i check to know for sure

Try switching your RCA cables around from the one that you know is getting sound. It may jsut be a bad rca or output from your radio!!

Posted on Sep 07, 2009

  • 5603 Answers

SOURCE: I plugged the USB to MIDI lead input nd output the

You should NOT be able to damage the unit by reversing in and out on MIDI connections.

MIDI connections are fairly safe against damage unless you drive a ground loop into the output ones.

ALWAYS operate any connected equipment from the SAME power source receptacle.

Fopr instance, do NOT have a musical device powered froma wall receptacle across the room and connected to a computer on the other side as an example.

Posted on Apr 07, 2010

Testimonial: "Thank you very much for your help. After I let the Alesis SR16 rest for a while it started to work again."

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1 Answer

I am getting a weak signal on the right channel of my Hitachi HT-40S turntable with original Ortofon LM 10 cartridge.


If you have disconnected the cartridge and touched the leads in that state and you had no sound out of the right channel, then there is nothing wrong with the cartridge at all. You either have a bad lead from the deck to the amp, or a bad connector to the amp. If replacing or fixing the lead does not correct the problem, then you have to look at the pre-amp in your amp as the cause. The amp will have a dedicated magnetic cartridge pre-amp. It's failure on the right channel will not effect any other function, such as tape or radio. You can easily find the cause, by tracing the phono connector wires back (inside the unit) to the first port of call on the PC board. You will either find a single IC doing most of the work of the pre-amp or two IC's, one for each channel. If you are lucky and a single channel IC does the work, replace the right hand one. Otherwise replace the dual channel one.

If you think it's the cartridge, then remember that putting the left channel connector on the right input of the cartridge should see no sound. But if you hear sound by switching the cartridge connections the cartridge is good.
I have noticed that you have tried another amp with the deck and it made no difference. This implies then a faulty lead between the deck and amps.

Oct 28, 2016 | Audio Players & Recorders

1 Answer

I have a peavey minx 110 the input channel does not work but the amp does work when I use the pre amp input. Can anyone offer suggestions. thanks


I think you may have a bad input jack, or it has come loose from the circuit board.. If you need to take it to a repair shop, ask about their bench charge. It may be cheaper to just replace the amp.

Oct 06, 2016 | Peavey Music

2 Answers

NAD 3130 one channel stopped working, tip what to do first?


May not be serious,first with good channel playing move all controls and switches on the amp,Dead spots can occur on controls especially if they are rarely used.balance controls,tape monitor switches etc so work them all.If fault doesn't clear try headphones,switched sockets can cause problems.next swap input signal leads,left to right. and if still no good try swapping over speakers left to right.STILL no sound? its the amp.Time for tools and a test meter.You can look for blown fuses but its never a good idea to replace a blown fuse without testing the circuit first.may cause further damage and put up the repair cost

Jun 04, 2014 | NAD Audio Players & Recorders

1 Answer

Need schematic for Crate PCM-8 DP+


Without a schematic you can still trace the circuit to locate the fault.

Put a music source or sound source into the bad channel and a good channel, and with an oscilloscope or with a pair of high impedance headphones with test leads on the ends- you can set up a low z headphone with an impedance match trasformer, make sure you have test prod ends on one of the leads. The other can go to a chassis ground. Start at the input and work your way forward comparing the signal between the good channel and the faulty channel. When you lose the signal or you encounter severe distortion, you are in the vicinity of the defective part.

Common failures are a Deffective 4558 or TL072/TL071/TL074 IC chip. You may have a faulty electrolytic capacitor, or even a faulty bypass caoacitor in general. Bad solder connections, even a broken fim resistor.

With the IC chips, the usual power pins for an 8 pin plastic or ceamic DIP are pins 4 and 8. usual outputs for the 8 pin are 1 and 7 the remaining pins are the inverting and noninverting inputs. 2 and 3 and 5 and 6.

Also check switches and especially those with interupts on the input and output jacks- they can get dirty.

Apr 10, 2012 | Music

1 Answer

Hi We have an Allen & Heath Mixing Desk connected to two Yamaha P4500 audio amplifiers (via graphic EQ and compressor/limiter) which power the 4 main and 4 side speakers in our church. We now want to...


'Splitting' leads is never the best way to distribute a signal. The best solution is to use the parallel inputs of the Yamahas to chain them together: mixer to amp1, amp1 to amp2, amp 2 to the Cloud. You should only need to use one input on the Cloud to drive all the channels, using the input switches at the rear.

Let me know if you need any clarification on this.

Sep 21, 2011 | Yamaha P4500 Power Amplifier 2-Channel

1 Answer

Hello, can someone help me, i want to know how to connect the wires if i want to use 2 channel instead of 4. THANKS IN ADVANCE!!!!!!!!!!!!!!


In order to bridge an amp, you will connect the positive lead of a speaker to one positive input on the amp, and instead of connecting the negative lead to the negative input next to the positive input you just connected, connect it to the negative input on the neighboring +/- pair. For a 4 channel amp, there should be 4 +/- pairs. you will treat 2 of these pairs as one channel, and the other 2 pairs as the other channel. Do the process described above for the other speaker as well. Here is a link with helpful pictures: http://www.ehow.com/how_5305710_bridge-channel-amp.html

Mar 07, 2011 | Koiiler 8686-C Car Audio Amplifier

1 Answer

I just bought a pioneer pl-200 turntable at a flea market. I plugged it into an old am/fm/8-track amp's phono input and I know the amp cranks on fm but on phono, it's very low sound. It does get louder...


Turntable signal outputs are very, very low amplitude and either have to pass through a pre-amp before being connected to an amplifiers "ordinary" inputs (e.g. aux), or connect to an amplifier's specific turntable input in order to give the "normal" levels of volume.
This is because the cartridge (the bit that has the stylus or needle on it) can only generate very small amplitude signals.
As turntables are now outdated, a lot of amps no longer have a turntable input any more.
Unless you can also find a cheap pre-amp or an old amp with a turntable input, you may have wasted your money.

Sep 21, 2009 | Audio Players & Recorders

1 Answer

Piuoneer DJM600S feedback and cd input problems


Check List :
CD Deck 1 to Channel 1 CD Input
CD Deck 2 to Channel 2 CD Input
Mixer booth output to AMP's AUX or CD input.
use the BOOTH rather than the MASTER
even if you think you've done all these checks, check them again.
trust me I've been a DJ for 15 years & wired up **** loads of systems & still manage to ******* the wiring now & again lol.
you mite need to run an earth from your mixer to your amp.
One more thing, just out of interest you don't happen to have an amp with surround sound do you?
because if you do then switch the effects completely off this should sort it.

e-mail djtatty@hotmail.com

Jul 10, 2009 | Pioneer DJM-600 Silver Professional DJ...

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