Equinox Dual mono stereo power
Built using a fully discrete class A JFET gain stage and Hypex class D
Why Hypex Class D for the output stage? Well, they have the benefit of
being able to drive down to a 2 ohm load and provide up to 400 wpc with
very little waste heat and virtually no distortion.
So, no massive ankle shredding heatsinks needed, also they won't run up
your electric bill if you like leaving your amps on as we do.
We started with the Hypex modules over a year ago for a different
project, but quickly realised they showed a lot of promise. We like
many other people had an audiophile prejudice (for no real reason)
against Class D in general. All the other types we had heard sounded
good but didn't involve us in the music as a good amp should.
So we started work to build a gain stage to drive directly into the
Hypex module. Over the past year we learnt a lot about what works and
We chose the class A JFET input stage as it simply gave the best sound
by far. JFET's have the benefit of a distortion spectrum similar more
to tubes than solid state. Tonally rich, fast and involving so you
forget you are listening to gear and enjoy the music.
It wasn't an easy process, especially the amount of time it takes to
match JFET's to a higher tolerance than normal which lowers distortion
and improves tone and soundstage.
The class A power supply for the JFET stage would probably be
considered overkill, but again after listening to many options it
simply sounded as if all the other styles of regulated supplies were
causing half the music to be lost.
The end result, good recordings sound fantastic and less than stellar
recordings are still enjoyable as the amp lets the performance shine
The amps will be built by hand to order and quality parts are used
throughout, chosen by ear.
250W RMS 8Ω / 400W RMS 4Ω
Size (wxhxd) 43 x 10 x 35cm approx.
Available in silver or black
Pictures coming soon.