Dreaming of a DIY 8W Class A amp designed by Nelson Pass?

Excellent kit!

I have been using one ACA (stereo) with a pair of custom designed wide band speakers with wonderful success.  I’m thinking of building a dual mono pair for another system.

I have been using the supplied Mean Well power supply, but have some interest in a linear design.  As mentioned above, if it’s good enough for Mr. Pass, it’s good for me, so I’m thrilled with the sound.

What speakers are you using with the ACA?  I’ve been listening to a lot of high efficiency/sensitivity speakers and would love to get your recommendations.

@audioman58 

Wow....that’s a heavyweight mod!

There are some mods recommended for the ACA on DIYaudio that I’ve considered.  It’s nice to know there are some DIY people on here.

Has anyone moved from a single stereo model to a dual mono set?  Comments on sound and performance?

I’m seriously considering building a set of ACA dual monos.  I had a lot of fun with the stereo build and it sounds amazing with some wide band speakers I’ve designed.  I have another set of speakers that I think would be great for a dual mono set.

The ACA Kit reminds me a lot of the interest and excitement around the 47 Labs (ChipAmp) designs that came along 20 years ago.

@robeswi

Thanks for the information!

I’m going to build a dual mono set.  The stereo version sounds great with a small wide band monitor I designed and built.  I think a dual mono set driving a pair of 8” wide band speakers in a larger room will be awesome.  The BK-20 Kit that @schwartz36 mentioned might be a solution.

It would be wonderful if we could share photos of our ACA builds.  I see some on the DIY site, but I’m sure there are more.

@jayh

Thanks for sharing such a wonderful experience!

@dgarretson 

Please keep us posted!  I might upgrade the power supplies on my dual mono build and I’m extremely interested on your thoughts.