im in new jersey so you would have to ship the unit
Board repair for subwoofer
I have a 10 year old Martin Logan subwoofer which has had a chip or capacitor on a circuit board cease to function a few of times. It seems that the amplifier chip overheats, and just pops. It has done this three times despite having the sub sonic filter on my pre amplifier. I don’t want buy another entire replacement panel from Martin Logan, with the entire set of wires, connectors, circuit boards. Does anyone know of a diagnosis and repair shop for a circuit board for audio electronics in the US? (I live in central Florida.)
- ...
- 20 posts total
I wouldn't rule out replacing the sub with a new one. The amps in your sub are matched. If you go with another amp there will be a mis-match. The two speakers will no longer couple properly. For all the time, money and effort a new sub seems like a very reasonable option. For your needs a simple SVS or Rel may be a far better choice. |
Yes, I would have to get an amplifier plate that will replace the current entire plate, which has two circuit boards in it, coupled (each with an amplifier for each driver (woofer)). I’m sure there are options out there, as running one in parallel mode, as a Y branch, as @devinplombier suggests. ..but replacement may be a last option if there is no reasonable solution to these cheap amplifier boards on Martin Logan subwoofers (although perhaps a couple of my vinyl records also plays a role in burning up a component in these amplifier circuit boards.) |
A fair number of subwoofer plate amps are / were Class AB, but they tend to run hot when confined inside an unventilated enclosure, leading to their early demise. At this point, most people agree that Class D does an outstanding job in low frequency applications. I wouldn’t hesitate to recommend Class D for subwoofer amps - all the more so if it’s a plate amp, due to Class D’s lower operating temperature. If you have a high-quality subwoofer and you love its sound signature I would recommend converting it to external amplification, due to the added flexibility and elimination of the environmental challenges inside enclosures (temperature, poor ventilation, vibration). @drbond what is your sub's model number?
|
- 20 posts total