suggest a small to-3 amp

[osscar]

Good evening/morning gentleman!

Unexpectedly, I collected the radiators with following dimensions in mm:

320x7.5 cm fins - 3cm. to-3 pre-drilled (four per side).


I know that these are not massive, but some 30W would spread to my mind.
Therefore, it is thought to build one more monster but with MJ 15003 / 4 outputs or maybe JLH 10W. Is there some similar circuits which allows to put in parallel outputs, because i don't want these empty holes/fake transistors instead of working ones....
I could also use the MOSFETs in some variations Pass ZEN or similar, if find in to-3.
I don't need big powerful amp, just some 10-20W may be class A or partly class A with 12-20V PSU.
What do you recommend?
thank you.

[wahab]

A high quality low power amp using two pairs of 2SJ50/2SK135 Lateral Fets
for each channel.

With about 400 mA total bias with a +-20V power supply, class A is sustained
in a wider power range that with bipolar siblings, along with a distorsion spectrum
monotonicaly deacreasing, but the exact shape is defined by the topology, though..

[lineup]

We should look for amplifiers that can use these:
2N3055, MJ2955
MJ15003, MJ15004
MJ15024, MJ15025

Any amplifier can usually use replacement transistors in output.
Sometimes even without modification.
With modification there are plenty amplifiers that can use MJ15003/MJ15004.
Even if they were designed with other plastic devices.

This is one. Uses 2 pieces of 2N3055. TO3.
But in Class A, so you need a larger heatsink, when bias hard.
Death of Zen - A new Class-A power amp

[osscar]

tnx. i also like musical fidelity A1 circuit, ok ill try to simulate it with LT spice.