Originally Posted by John Be
Hey guys, I hate to post a question that I'm sure has been asked numerous times in this thread, but my searching has failed me... I have an eD sub (A3-200, A2-300?), 12 inch downfiring model, LT-200 amp, no external heatsink. Has worked reliably for what must be damn near a decade. Recently, the sub will only work for a few minutes, then stops. Light on the amp stays green. Any troubleshooting I can do, or is the amp done for? I just spent a few grand on speakers for a different room, so if there was a cost effective way to get more life out of this thing, that'd be awesome (and my wife might not kill me). Thanks for any advice.
sounds like the amp needs a rebuild. could be a number of things that cause what you describe... but just about all are due to the age of the amp.
Originally Posted by NOAMattD
Similar woes as the rest of you - My A5s-300 (sealed) sub seems to have died today. I noticed the LED was amber which I've never seen before and the back of the amp was very hot. I unplugged, let it cool and now it's red again but it won't turn on no matter what. I really would like to save the enclosure since I bought an unfinished one and did a custom wood veneer on it to match my entertainment center and it still looks awesome! I think the driver is probably fine still.
If it's an electrical issue (failing capacitors) I can solder so I could try and replace them to salvage the amp. If the amp is bad though, what should I replace it with? It's the LT500 amp so Dayton SPA500 seems like the closest match. I'm a good woodworker so enlarging the opening is no problem.
Thanks in advance.
your problem is more than just capacitors. and also, i would look first at the driver. eD has never been known for quality drivers, and at the age of it, it's would not surprise me to see the driver take the amp out. the first clue, is the overheating of the amp. i have seen the voice coils of eD drivers arc, and that will do exactly what you describe.
when i mentioned replacing caps before, that only applies to the LT550 and LT350 with the problem that the post describes. ( works, but intermittent ) there are no parts available for those amps, nor do i take them in for repair anymore. if the damage is beyond what is described, then there is no fix for those.
but John Be and NOAMattD, both of you are lucky that you have the amps that you do... ( LT200/LT500 ) as all the parts in them are modern and are still used in amps produced today. makes life easy for me, as i can have parts in stock that will fix many different brands and models of amps.