[ciphercomplete]

I'm just curious because I am loving mine right now. The K-501 with lots of bass, too good to be true.

The HD650 and the K-701 sound remarkable as well.

This thing has me itching to upgrade my DAC.

 

[fishski13]

here, here. silly good. i'm considering converting my M3 into balanced operation, and to power efficient speakers as well.

 

[justhavingfun]

One of my favorite SS amp is M^3 made by Rockhopper Audio. It does well with just about every headphones that I tried. And plus with opamp rolling, you can really tailor the sound to your liking.

 

[grawk]

I like mine.

 

[upstateguy]

I have one of the Rockhopper M^3s too.

Using it in another room with a laptop....

but the Constantine needed a better USB converter, so here's how it looks now...

Edit to add the Signature Picture

USG

 

[fordgtlover]

I like mine.

 

[tk3]

Checking in.

 

[Fungi]

Quite fine piece of amp. Don't feel the need to go higher.

 

[Uncle Erik]

Another one here, and built it with the bass boost. It's a fine amp, though has fallen victim to vacuum tubes. I have it tucked away, awaiting a time when I have the room to set up everything.

 

[LostOne.TR]

Got the 627/637, crossfeed, and bass boost with elpac here.

Wondering if the crossfeed has an effect on the sound even in off position... volume change is definitely there if I flip between the high and low crossfeed switch, even with the crossfeed set to off.

 

[ciphercomplete]

Quote:

Originally Posted by Uncle Erik /img/forum/go_quote.gif Another one here, and built it with the bass boost. It's a fine amp, though has fallen victim to vacuum tubes.

Alas this will eventually happen to me as well. I love tubes too much. I am so hard pressed to sell my Little Dot even though the M3 beats it in every category.

 

[ciphercomplete]

Rockhopper is currently building me a Sigma 11. Can anyone attest to the differences the Sigma 11 makes over the Elpac?

 

[grawk]

I can't quantify it, but I attribute most of the awesomeness of my m3 to the 5a/36v sigma 11.

 

[pabbi1]

I had two - one STEPS / 637/627 / Bass Boost, and the other an eBay linear supply / AD8610, IIRC. They were nice, but then I found tubes, and, lots of them.

 

[Fungi]

Quote:

Originally Posted by grawk /img/forum/go_quote.gif I can't quantify it, but I attribute most of the awesomeness of my m3 to the 5a/36v sigma 11.

Quantified power supply measurements

Also note that
Quote:

Originally Posted by Ti Do not use a power supply over 24V if the amplifier board is mounted in an unventilated chassis case. A higher power supply voltage causes increased heat dissipation in the MOSFETs.

grawk's M^3 is not a standard build; it's got extra juice and had to be built to handle the heat (literally).