Well, it's only 10wpc, Tim - some specs say 8wpc!

Somehow it doesn't flex the walls in the way that my old 330wpc Krell amp managed. A bit strange that.

But the bass is fine - its character being quite lean and controlled.
My own priorities lie further up the frequency spectrum, and it does a mighty fine job there.  Surprisingly transparent and detailed, good well focused imaging as well.
It's one of the few amps that I could happily live with longer term if I didn't get the itch to try new things!
It's well put together (as you can see from the posted internal pic) and looks seriously cute in a mini-Krell kind of way.

The price from some sources is silly-low.  It's a fine amp pretty much regardless of price, imo -- providing your speakers and music choices can make do with 10wpc!

I also lack the skills to build anything like that but I'd love to be able to! I'd go for a nice wee low power valve amp and a high power solid state number.

Just a wee bit of help which may save you smoke and tears.

Please note 2N3055/2N2955 are made by many companies do not bye a duff set avoid China, and far East devices, try and get the original from RCA or Harris.
Do not buy ever STC labelled devices, in the original device the Si was about 4mm Square and could easily run in the SOA (Safe Operating Area) at well over 100W, but the Si die in others are only 1mm Square, so smoke will happen.

Now also look out for 2N3772-3 in TO-3 this transistor makes the the 2N3055 look like a toy.

Oh the RCA and Harris devices will manage 1MHz BW with ease the crap stuff maybe 100KHz

The reason I wrote this when I designed large linear PSU at 55V 100,000Amps we used 1000,s of power transistor and the new buyer trying to save money bought 100K of the crap transistor to save just a few old pennies.


Most 'A' Class designs are still only a push pull designs, SECA designs I think sound better, the Mullard CCT (1968-1972) before JLH used a choke as constant current much like so many modern design from Greece or Italy, but these are low power and the choke is huge and heavy.

Wireless World circa 1974 also did a design and our Noel Keywood also had a great bash at it.

Getting the PSU to be a very low impedance is the trick to get a good sound and 50W-70W SECA I made sound better than some of the 300W I made.
The 300W had 80 big MOS FET,s and a set of driver for each set of 5 FETs, this was done to over come the huge current to overcome the dreadful effects of the large gate capacitance. Also note the early SECA designs I did did not have a regulated PSU so to over come the hum caused by the ripple current the 300W had 3 sets of 1.5F yep 1,500,000uF at 80V ouch cost at the time was crazy.

A large bank of NiFe cell would have been better but at about 0.5Tons crazy and not very portable.