Tag Archives: class A

Class-A Amplifiers and the Krell KSA-150

Many readers will be aware of how much I love Krell audio gear and their class-A designs. The Krell KSA-150 Class A Power Amplifier is a great example of one of these hot, power-hungry designs. In this article, I discuss the very basics of class-A amplifiers, with service details and images of the gorgeous KSA-150!

You may have already watched my restoration video, where I completely refurbish one of these beasts.… Read more

Accuphase C-202 Class A Preamplifier Service

As a bit of a teaser for the new year, I hope you like this piece on servicing my Accuphase C-202 preamplifier. The C-202 is a line-level, Class-A preamplifier, with dedicated CD buffer and is fully hardware balanced. It is a superb piece of gear.

I pulled the main circuit board to address some dry joints and clean tobacco residue, left from the previous owner.… Read more

Krell KSA-150 Class-A Amplifier Service

I have been flat out with restorations and repairs. One of my recent jobs was to inspect and service a lovely example of a Krell KSA-150 Class A Power Amplifier.

You may have already watched my restoration video, where I completely refurbish one of these beasts. This video has actually generated a great deal of interest and I receive lots of queries in relation to my resto, and about the KSA-150.… Read more