Q451990 wrote:Let us know how it works out for you... Sometimes these problems are intermittant, and a quick test won't show them. The rebuilt amps I've received from Bose/Clarion have always worked flawlessly, but I'm pretty sure they just swap in new boards and speakers into the old case.
Heath
Will do -- you know it!
I think both problems would be hard(er) for a bench technician to identify without running the amps through a battery of tests or testing both amplifiers simultaniously. I bet a single or "specific set" of parts were replaced to correct the "siren noise" or the most common failure problems as the "cure all ills" solution.
I was up all night trying every possible combination of amp/speaker/channel/head unit/ combination to isolate the problems and rule out any other variables through testing.
One amp performed significantly "louder" than the other -- I guess like 45+ dB or so. So one amp delivered output on a level that would be compatible with the rear speakers at mid fader point. So I was really glad about the volume level that it delivered and I called that one the "good volume" amp. The other amp was so weak that you could barely hear it operate at the same volume level. I called that one the "weak volume" amp.
Unfortunately the "good volume" amp, after playing for a few minutes, would make a loud pop when power was restored. I switched out head units and switched between channels (all combinations that I had available) to further isolate this issue. The "weak volume amp" didn't make the popping noise.
Both speakers worked the same regardless of the amp/head unit combination -- following the characteristics of the good vs. the weak amp. I could not detect any difference between the (R/L) output channels on either head unit with any combination of speaker or amp. So it appeared the issues were mutually exclusive to each amp.