Category Archives: Amplifiers

Articles about amplifiers, including power amplifiers, integrated amplifiers, big and small amplifiers, solid-state and tube amplifiers!

Rare Luxman M-4000 Power Amplifier Repair & Service

Check out this beautiful Luxman M-4000 power amplifier I serviced recently. Let’s take a look at this classic vintage amplifier.

The Luxman M-4000 power amplifier is a fairly compact, dense, 180 Watt per channel bipolar design. It’s the predecessor to the M-4000A, which looks very similar, but is substantially different design-wise, and even rarer. I completely restored an M-4000A for a customer a couple of years ago.… Read more

Stunning Rotel RA-1412 Amplifier Cleaned, Serviced & for Sale!

I’ve just cleaned, repaired and serviced this stunning Rotel RA-1412 integrated amplifier and she’s now available for purchase.

This incredible Rotel RA-1412 integrated amplifier is now available to buy, from my friend Pierre @ Revolution Turntable. Pierre runs Revolution Turntable, one of the last proper hi-fi stores in Western Australia. It’s well worth a visit if you haven’t checked them out, get in touch with Pierre if you are interested in this beast.… Read more

Krell KAV-150a Power Amplifier Repair & Restoration

This beautiful Krell KAV-150a power amplifier is the partner of the KAV-300i I restored last year. Come along as I repair and restore this one.

The Krell KAV-150a is another product from Krell’s more affordable KAV line, from the mid 90’s. Whilst certainly more affordable, this gear is most definitely not cheaply built, sharing the same stunning machined aluminium casework and stainless steel fasteners as other Krell gear.… Read more

Marantz 1152DC Integrated Amplifier Repair & Restoration

How’s this for a beautiful amplifier. I recently repaired and restored this absolutely stunning Marantz 1152DC integrated amplifier, let’s take a look.

The Marantz 1152DC is an integrated amplifier from the upper middle of Marantz’s range in the late 1970’s. The 1152DC and others from this series are very collectible now, thanks to their unique looks, great sound and Marantz’s famous build quality. … Read more

Transistor Matching for an Accuphase E-202 Amplifier Repair

This post is about a gorgeous Accuphase E-202 integrated amplifier I’m repairing, and the need for careful transistor matching when repairing audio gear like this.

Choosing and matching transistors correctly is critically important when repairing or restoring audio electronics. I’ve learned this over the years, through experience and from people who’ve been doing this for much longer than I have.… Read more