Save any hifi search on your hifishark.com profile to easily repeat it and even have an optional mail when new listings are found

B&W MPA1

The search result contains affiliate links to partners of Hifishark. Use these links to ensure a small donation to Hifishark upon your purchase!
-
Resources
Discuss B&W MPA1

Please log in to discuss B&W MPA1 with other users of Hifishark

B&W MPA1

By erekers, 18. September 2020, 18:09.
One off my blocks got a damage. The headfuser collapses when you put it on the power network. Any suggestions??
And has someone a single block for sale??

By maximus, 21. September 2020, 17:09.
Well, such power amplifiers can usually be repaired. They are not quite new anymore, so some parts may be hard to find. I would consult with a qualified technician because you seem to have a short-circuit somewhere.

By Vivid, 15. November 2020, 15:11.
They're a fairly simple design and all components are still available, though the power FETs are getting scarce (There's two different types of MPA1 - UK & Japanese built which have different FETs. I have some stocks of both types) Weak points are the bias transistor which tends to run hot, and if it fails open drives both sets of FETs full on, effectively shorting the output. There's also a 100uF non-polarised electrolytic capacitor in the feedback chain which will likely have dried out by now. You should get this changed at the same time as any repair.

Maybe you are also interested in these items: