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<blockquote data-quote="Evan Kirkendall" data-source="post: 8009" data-attributes="member: 5">Here&#039;s an odd one. I&#039;ve got a random QSC RMX850 in a rack that just gets used for misc stuff. Kind of the &quot;bitch&quot; amp that goes out whenever I&#039;m short on gear. Usually it just runs stereo. Today I was doing some shop work and decided to bridge it so I could make some presets for my SLS920&#039;s. Switched the DIP switches around, tossed a banana plug on the binding posts, and boom, no noise. Well, it was very fucked sounding. Very distant, almost like someone flipped the polarity on one of the amp channels. Oh wait, channel 2&#039;s gain knob is still up. Ok, turn that down- about halfway down it starts sounding normal, and then at 0% the signal light on channel 2 goes out. What? Sounds normal enough now, but the signal light is out. Turn the gain back up, signal light comes on, and it sounds fucked. Very strange. Now, if I recall correctly, in bridge mono, channel 2&#039;s gain knob is irrelevant, and it shouldn&#039;t matter where it is, right? Also, the signal light should not be affected, right?The amp seems to function &quot;normally&quot; when I have channel 2&#039;s gain knob all the way down, but it only shows signal/clip on channel 1. I can confirm, it gets way louder when the amp is bridged, so something is working correctly. I&#039;m just kind of baffled with the gain knob/polarity issues. Anyone seen this before?&nbsp; On an unrelated side note(well maybe not)- the difference in tone quality between a bridged RMX850 and a PL6.0 stereo is pretty amazing. Evan</blockquote>

[QUOTE="Evan Kirkendall, post: 8009, member: 5"] Here's an odd one. I've got a random QSC RMX850 in a rack that just gets used for misc stuff. Kind of the "bitch" amp that goes out whenever I'm short on gear. Usually it just runs stereo. Today I was doing some shop work and decided to bridge it so I could make some presets for my SLS920's. Switched the DIP switches around, tossed a banana plug on the binding posts, and boom, no noise. Well, it was very fucked sounding. Very distant, almost like someone flipped the polarity on one of the amp channels. Oh wait, channel 2's gain knob is still up. Ok, turn that down- about halfway down it starts sounding normal, and then at 0% the signal light on channel 2 goes out. What? Sounds normal enough now, but the signal light is out. Turn the gain back up, signal light comes on, and it sounds fucked. Very strange. Now, if I recall correctly, in bridge mono, channel 2's gain knob is irrelevant, and it shouldn't matter where it is, right? Also, the signal light should not be affected, right? The amp seems to function "normally" when I have channel 2's gain knob all the way down, but it only shows signal/clip on channel 1. I can confirm, it gets way louder when the amp is bridged, so something is working correctly. I'm just kind of baffled with the gain knob/polarity issues. Anyone seen this before? On an unrelated side note(well maybe not)- the difference in tone quality between a bridged RMX850 and a PL6.0 stereo is pretty amazing. Evan [/QUOTE]

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