Rerurn to Romy the Cat's Site
In the Forum: Audio Discussions
In the Thread: Two-stages, hybrid, small, powerful class “A”?
Post Subject: A few more hybrid suggestionsPosted by Chirag on: 5/4/2006
Hey Cat,
Well..my first question would be regarding the application. The big Melq tube is already doing the bass towers...is it not enough current? And wouldn't a proper class A 100w amp with its low low efficiency require something like 1000w+ of cooling? Should be nice in the winter no?
In addition to the Aria guy, the tubecad.com guy has several circuits up using his "aikido" circuit as a driver and several mosfet and transistor outputs. It looks on the surface like a complicated SRPP setup, but I am not capable of commenting on the design. Most of his suggested amp diagrams focus on lower outputs of 10-20w, but using more current capable tubes, you may be able to drive a bank of solid state outputs to get you what you need. I generally like his approaches and I'm not basing this on any experience with this particular design.
The other option I would suggest are the non-hybrid feedback based Pass Labs aleph amp circuits. They remind me of the artificial sweetener Splenda...they taste kind of like sugar, but the overly sweet and chemical attitude does come through in the higher frequencies. The Aleph 30 I tried for a few months did not screw up the midbass with my little Tannoys any more than my PP tube amps. I am wondering how well his newer 30w "J" version could work on my 15" pro tannoys.
I think the italian Pathos company has a products that might fit the bill. From the smaller integrated amp I heard, it may not cut the musical muscle you require. This amp has a lot of fluffly names around it, but they do claim tube driver and class A output.
Regarding the Lamms, is it possible to cut away some of the odder opamp type middle stages and use a higher current tube to push the outputs? The output setup and case is already there.
If you're as intense as I believe, can your little 6E5P tube in the Melq configuration drive a bank of mosfets or transistors?
Best,
ChiragRerurn to Romy the Cat's Site