Question about Bryston BP-25 Amplifier

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No right channel output

Hello, I just purchased a set-up that includes a BP-25 and 4B-ST power amp. I am not able to get any sound from the right channel and after doing some isolation tests, I am pretty sure it is the output on the pre-amp that is at fault. One thing I noticed, is if I turn the balance completely to the right so I hear nothing, and then start cranking up the volume, when I get to a reasonable high volume, the right channel suddenly activates (at the right volume) but when I turn it back down, I lose the channel again. Has anyone experience this problem before and/or can anyone suggest a solution? The source is a Linn Ikemi CD Player and I am positive both speakers are working fine. -Matt

Posted by Matthew Limarilli on

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Randy Herring

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Feed the amp with the left channel preamp to the right channel input on amp and check output. If you get output from amp then pre amp nedds to be checked out if still no output then amp is suspect. Randy

Posted on Feb 25, 2007

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My refund from Striction BP from over a month ago regarding my return of their product within the 60 day return period.


Money back guarantee. FIXYA has no connection with this company. Seek legal advice if needed.

Quoting from their web site:

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100% Satisfaction Guarantee We want you to be completely satisfied with every product that you purchase from Striction BP. That's why there is no fine print and no special clauses in our guarantee. What it says is exactly what it means. Our 60 day money back guarantee starts the day you make your purchase. Please use and evaluate the product over this 60-day period and if you do not see or feel the results that you expected, simply call our customer support team at 844-427-2873 to make arrangements to return the opened and unopened bottles for a prompt refund of your purchase price less shipping, handling and a $9.95 restocking fee per bottle. No questions or explanation required... your complete satisfaction is guaranteed. Period!
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Jun 15, 2018 | The Computers & Internet

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Still have sound through speaker with channel B gain input set to OFF


This could be fixed checking/changing the vol pot of the "B" channel, also i would highly recommend to clean all back switches, including Stereo/Bridge switch, which it should be outwards to operate in Stereo mode, let me know if i can help more.

Jan 26, 2013 | Peavey PV 900 Power Amp

1 Answer

My husband purchased one of your xr8600 peavey mixer the problem hes having is he cant get the echo settings right.please can you help.


View videos on YouTube regarding "mixer setup". Find the parts of setting up of "effects". Don't worry that you have a different mixer, the principles are all the same for analog mixers. Steps are this: Set the EFX send level for EACH of the input channels (knob above each channel gain) for the proportion you want for each channel. Check that the level you are sending does NOT cause the effect clip light to light very much. Set the effect you want, delay, echo, etc. with the selector knob. Advance the output sent to the power amp with the two knobs in the upper right of the panel. Adjust the "time" knob for the delay or effect depth you want. Then go over the same settings in the same order until you get the sound you want.

Apr 24, 2011 | Peavey Xr 8600 8 Channel Powered Mixer

1 Answer

No sound to speakers


There are many things, including hardware failure to cause this.

Make sure that the PFL buttons are ALL up. The LED indicators on the right are shared with solo channel and main output.

REMEMBER that the MAIN 1/4 inch jacks are TRS balanced and plugging a mono cable into these OR st the other end plugging into a MONO will short out the balanced line drivers. Since this also goes to the power amp, that can ground out the signal to the amps. All the other 1/4 inch jacks are pseudo balanced and mono plugs will not cause a problem other than possible hum or noise levels.

Do you get anything out of the PHONES jack?

Note that the standby switch must be UP in the upper right corner... it kills the first 12 channels. ALso with two speakers make sure the MAIN slide switch is in the MAIN A MAIN B upper position.

Start with all your PAN controls at 12 o'clock.

I have repaired two of these units and a PMP3000. Great caution: NEVER pull or insert speaker cables while unit is on. Great damage can be done. IF the fuse blows do NOT replace it!!! Get serviced immediately as replacing the fuse will likely do more damage. The worst damaged one required replacing around a dozen transistors and other components.

The power amps in these have a habit of arcing out... NEVER store in a high humidity area!!!

Try a set of stereo headphones plugged into the L and R MAIN out 1/4 inch jack... If you have audio there your power amps have failed or the +/- 85 volt supply has smoked.

May 19, 2010 | Behringer Europower Pmp5000 Powered Mixer...

1 Answer

Volume at 10 produces very low speaker output.!?


It sounds to me that all you are getting is the pre-amp stage of the amp and nothing from the power amp stage. As it is on both channels then it is something that is common to both. This could be something to do with the power supply of the power stage. Or whatever is on the heatsink. It could be that the amp uses a single audio amp IC for both channels. If it does my bet is that it's gone. If it uses two sets of semiconductors for the right & left channel it would be highly unlikely that both channels have gone, but not impossible.

Dec 27, 2009 | Audio Players & Recorders

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Purchased 2 used sonance sonamp 260 for homewide speaker system (12 pair).line out from receiver into first amp powering first 8 pair.line out from first amp into second amp powers remaining 4pair.only...


I am assuming you are using the standard sonamp 260 not a 260x3
and that when you say you are getting sound on only 1 pair that means only on 1 side (left or right channel only?)

Are using a speaker selector box? you must to regulate the resistance (ohms)

if so first unhook all but on pair of speakers and see if both channels are working.

if they do your problem is in the speaker selector not the amp if no then check to see what the amp level is set to. These are the two small holes on the front right of amp make sure they are set about equal at around half way up.

If that doesn't work flip the RCA cables coming to the amp perhaps you have a bad cable if that doesn't work make sure your receiver (source) is outputing a stereo signal to begin with.

lastly 8 sets of speakers off 1 amp? that's pushing it.even with a high quality Niles or speakercraft selector that controls the resistance going to an amp I wouldn't go past 5 sets.

The right way to do it would be to use 260x3 or a sonance or speakercraft 12 channel amp.




Nov 04, 2009 | Sonance Sonamp 260 MKII 2-Channel...

1 Answer

Which capacitor or resister we use when connecting tweeter with subwoofer, or what do we connect to the subwoofer to get more bass ?


Hello johnwisam,

When using component speakers, it is normal to connect the head unit or amp outputs directly to the woofers and use a "high-pass" filter to the tweeters. Most component speakers sold as a set will include the correct filter along with wiring diagrams. The12volt.com web site shows examples of passive crossovers here.

Amps usually include built-in filters and a means of setting crossover frequencies according to the speakers attached. If the amp is connected to full-range speakers, it is set to "Full" or "BP". When used to drive subwoofer(s) only, the setting is most often "low-pass".

Most stock radios and aftermarket head units are relatively low power and just do not produce enough power output to drive subwoofers adequately. It takes more watts to move the larger cones and that usually means a separate amplifier.

Hope this helps.

May 03, 2009 | Car Audio & Video

1 Answer

Problem with Yamaha Amplifier 361


volume levels on all channels varies depending on what dsp mode you are using. to be able to determine the level you desire, just chnge the level setting of those channels. either you do it by remote control or the front panel of the amp. try setting the dsp mode on disco and you should hear higher vol levels on all channels. Do not expect as well all channels to produce same vol levels as your effects speakers may not be able handle higher power levels.

Aug 12, 2008 | Yamaha DSP-A1000 5-Channel Amplifier

1 Answer

RCA cable use


You can plug into the left channel and it will feed both the left and right channels.

To confirm that it's feeding both channels, connect the speaker to one channel at a time. With signal fed into the left channel only, you should get sound when you connect the speaker to either channel.

Apr 18, 2008 | Sony XM-754HX Car Audio Amplifier

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