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In Reply to: RE: Any of you near Central NJ? Stop by for a Listen! posted by Maxamillion on November 04, 2015 at 10:11:28
Thanks for the invite, but I am on the opposite coast. Do you have any specs on your amp?
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Too bad. I think you'd enjoy them.
What specs would you like? They weigh 180 lbs each, have a 2.3kV B+ on the 833C at 160mA, are pure Class A1 up to 40W then Class A2 after that up to 200W. Completely separate power supplies for input/driver stage and output stage, driver is the mu-follower-loaded 6E5P triode-wired tetrode directly DC coupled to the grid of the 833C (no coupling cap). Output transformers are -3db at 8Hz and 66kHz, double C core amorphous Metglas cores with teflon interwinding insulation and weigh 62lbs each (Monolith Magnetics).
Here's a peek underneath the chassis:
Absolutely badass!! Love it. Based on your description I would expect pretty awesome sound. 62 lb. output transformers!! Do you think this company can do something special for a pair of 6C33C monoblocks that I have? They are parallel SET. The current OPTs are good, definitely not budget, but I am sure they can be bettered.
You can always ask them. Drop Ward a line - he's a great guy and fellow DIY nut.
It sounds like a impressive amp. Do you have any RMS power and distortion graphs? I would be interested to see bandwidth and distortion for say 25 watts and 40 watts RMS.
I can tell you that at full 200W output the bandwidth is 32Hz to 60kHz. I never need close to that output, though. The bass shakes the walls when I play Yello.Haven't measured the distortion mainly because I don't feel like lugging them down to the shop, but I probably should one of these days. I've just been too happy the way they sound now to mess with them much. I do plan to do some mods like pulling the 10V, 10A filament supply outside the chassis at some point to drop the overall weight and noise floor a bit, but I've been extremely busy with work lately. Noise floor is still outstanding, though, at 300uV total with the inputs shorted.
Edits: 11/05/15 11/05/15
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