Log in
Register
Home
Forums
New posts
Search forums
What's new
New posts
New profile posts
Latest activity
News
Members
Current visitors
New profile posts
Search profile posts
Features
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Menu
Install the app
Install
Reply to thread
Home
Forums
Pro Audio
Junior Varsity
Multiple amps suddenly stopped working in stereo mode but still work in bridged
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="joey toribio" data-source="post: 216706" data-attributes="member: 15637"><p>I've got 4 Accusonic/Show amps (2 x PSA-3900, 2 x PSA-31500), all four of them were working in all modes (stereo, bridged, parallel/mono). The following day I was testing them out and all of a sudden all four amps only work in bridged mode but not stereo mode or parallel/mono mode. Has anyone ever seen or heard of this before? I'm testing each one on their own so it shouldn't be a power supply/voltage drop issue. The only thing the four of them had in common is that they were all plugged into the same power bar running through a DBX Driverack PA2. So I tried them individually on a different power bar and a different outlet with a direct signal to each amp, bypassing the PA2 and still have the same issue. What would cause 4 individual amps to all lose stereo mode at the same time? I have verified the following during my trouble shooting:</p><p></p><ul> <li data-xf-list-type="ul">speaker is working: used multiple working speakers with no luck</li> <li data-xf-list-type="ul">Speakon cable is working: wired correctly to pins 1+/1-</li> <li data-xf-list-type="ul">signal is working: balanced signal being sent via XLR</li> <li data-xf-list-type="ul">power supply is working: breaker has been reset</li> <li data-xf-list-type="ul">breakers on all amps are all reset</li> <li data-xf-list-type="ul">clip limit is on but i've tried it off as well with no luck</li> <li data-xf-list-type="ul">30hz filter is off but i've tried it on as well with no luck</li> <li data-xf-list-type="ul">bridged mode: signal showing on both channels when channel A pot is used, as designed. sound is being sent to bridged output channel.</li> <li data-xf-list-type="ul">stereo mode: Signal is showing on both channels A and B. sound is not being sent to output channels A or B.</li> <li data-xf-list-type="ul">parallel(mono) mode: Signal is showing on channel A as designed. sound is not being sent to output channels A or B.</li> </ul><p>Here's a link to an older version of the amp that had binding posts. my version has 3 speakon terminals only 1 stereo pair and a 3rd for bridged mode. <a href="https://www.manualslib.com/download/1536675/Show-Psa-Series.html" target="_blank">https://www.manualslib.com/download/1536675/Show-Psa-Series.html</a></p><p></p><p>pics of front and back:</p><p>[ATTACH=full]209595[/ATTACH]</p><p>[ATTACH=full]209596[/ATTACH]</p><p>There's probably an obvious reason but I don't know what I'm missing.</p><p></p><p>Thanks in advance for your help.</p></blockquote><p></p>
[QUOTE="joey toribio, post: 216706, member: 15637"] I've got 4 Accusonic/Show amps (2 x PSA-3900, 2 x PSA-31500), all four of them were working in all modes (stereo, bridged, parallel/mono). The following day I was testing them out and all of a sudden all four amps only work in bridged mode but not stereo mode or parallel/mono mode. Has anyone ever seen or heard of this before? I'm testing each one on their own so it shouldn't be a power supply/voltage drop issue. The only thing the four of them had in common is that they were all plugged into the same power bar running through a DBX Driverack PA2. So I tried them individually on a different power bar and a different outlet with a direct signal to each amp, bypassing the PA2 and still have the same issue. What would cause 4 individual amps to all lose stereo mode at the same time? I have verified the following during my trouble shooting: [LIST] [*]speaker is working: used multiple working speakers with no luck [*]Speakon cable is working: wired correctly to pins 1+/1- [*]signal is working: balanced signal being sent via XLR [*]power supply is working: breaker has been reset [*]breakers on all amps are all reset [*]clip limit is on but i've tried it off as well with no luck [*]30hz filter is off but i've tried it on as well with no luck [*]bridged mode: signal showing on both channels when channel A pot is used, as designed. sound is being sent to bridged output channel. [*]stereo mode: Signal is showing on both channels A and B. sound is not being sent to output channels A or B. [*]parallel(mono) mode: Signal is showing on channel A as designed. sound is not being sent to output channels A or B. [/LIST] Here's a link to an older version of the amp that had binding posts. my version has 3 speakon terminals only 1 stereo pair and a 3rd for bridged mode. [URL]https://www.manualslib.com/download/1536675/Show-Psa-Series.html[/URL] pics of front and back: [ATTACH type="full" alt="20220613_170819.jpg"]209595[/ATTACH] [ATTACH type="full" alt="20220613_170806.jpg"]209596[/ATTACH] There's probably an obvious reason but I don't know what I'm missing. Thanks in advance for your help. [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Pro Audio
Junior Varsity
Multiple amps suddenly stopped working in stereo mode but still work in bridged
Top
Bottom
Sign-up
or
log in
to join the discussion today!