Hi Power Chip Amp Anyone?

[eris]

Does anyone have a chipamp design that could easily drive a stereo pair of Magnepan 1.6QRs? They are a challenging 4ohm load and require at least 120W / Channel into 8 with something that can go down to 4ohm.

I was thinking that a pair LM4780's running in bridged-parallel mode per channel should do the trick. That and a boatload of capacitance plus a 300VA/25 volt dual tap Hammond transformer per channel so you've got dual-mono operation.

Anyone with experience driving eletrostats or planar ribbons with Gainclones? Any special problems other than the low impedance and high power requirements?

thanks guys...

(BTW: I've been reading the Zero Distortion power supply design article and its very informative http://www.zero-distortion.com/techn...powersi_05.htm)

[AndrewT]

Hi,
a second-hand Krell seems more suitable than a chipamp or group of chipamps.

Or join the KSA100 Klone threaders and build your own Magnepan driver.

[halo0925]

I had the chance to preview one of my BPA300+ chip amp designs on a set of Martin Logan Summits, the amp preformed perfectly, but my amp cost well over 1K dollars to assemble so I would have to agree with Andrew T look at the krell clone threads would probably be cheaper in the end and work as well or better

[billbo]

If you are on a budget and want resonable performance, try a couple of stk4048xi's. They are cheap, work great and easy to build. I have posted pics in the amp gallery on page 28
Cheers
Billy