Granite audio 864SR Power Amps

Granite audio 864SR Silver Reference Mono Blocks 60/30 wpc kt-88 mono's. I'm the second owner & I just bought a new pair of speakers that require more power 

This amp is all new on the inside. 

At
first you might think it looks similar to the Model 861 on the
outside.  But, the similarity is only skin deep.  This new model sports a
custom granite look 5R4WGB rectifier tube just like the one on our
flagship DECO amps.  Then the circuitry inside is so different from the
861 that it demanded a whole new model number. 

The 864 has a
dramatically improved signal-to-noise ratio of 102dB at rated output. 
This is due to the all new filament, plate, and volume control
circuits.  And the THD Total Harmonic Distortion measurement is also
improved 50%.  Then the 864SR Silver Reference has its internal signal
path wired with our world renowned 470 silver interconnect wire.  This
wire is 99.9999% pure silver and double shielded to reject noise and
make sure you have the cleanest purist path for your music.  Our
customers have been asking us to internally wire our power amps with our
470 silver wire for years.  They've come to appreciate the great sonic
benefits of the 470 silver interconnect between their top quality
components and it only made sense that we finally carry that same super
quality wire to the interior circuits that carry the precious music
signal.  Of course we also offer the 864 without the internal silver
wire to give you the choice.

We debuted the all new 864SR at CES
in Las Vegas.  And everyone was blown away by our sound.  You will be
too when you hear the 864SR  Silver Reference.