It seems that most subwoofers are using class D amplifiers these days: is that because it is better, or because it is cheaper? Would you recommend the class AB over the class D for subwoofers? (Hoping not to open a can of worms.)
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.)
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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.) |
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