2. home-theater
  3. 178173-1662

Repair service for Revel B15 subwoofer

I have an old B 15 subwoofer that I use as a center channel bass source with my home theater system which is otherwise very modest. I have noticed lately that the woofer is not putting out sound in response to an input signal. The woofer itself seems to be OK. I believe the problem is with the electronics. Does anyone know a service or a shop that has some expertise in repairing the electronic components of this unit? Thanks for any response.

lewm
epping4est
7 posts
 

My two Revel B15a subwoofers have the same [no response to input] problem. If not worth fixing, then what is the 15" driver’s nominal impedance, and what would be an appropriate substitute amplifier?

 

Is there a service manual for the B15As?

Post removed 
epping4est
7 posts
 

The Revel Performa B15a subwoofer employs a class-AB amplifier which can run without a load, which might make one think that the problem could be repaired by shipping only the subs' plate amplifiers to an electronics repair shop. PROBLEM: A B15A's plate amplifier depends on various a/c voltages coming out of a massive transformer screwed and glued to the inside rear of the subwoofer's MDF chassis. i.e. Two choices:

  1. Ship the entire 105-lb unit for repair
  2. Ship just the plate amp to a repair shop that has the cable harnesses and power supplies to deliver the voltages needed by the plate amp.
Post removed 
epping4est
7 posts
 

BTW -- The nominal impedance of the B15a subwoofer’s 15" driver is 4Ω:

(For whatever reason, I cannot post the corroborating image here -- despite that it appears in the Preview.)

More to discover