Category Archives: Amplifiers

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

Beautiful Vintage Sony Hi-Fi System Service

Is it any wonder folks new to hi-fi go nuts over old gear like this? Those of us who’ve been around a while probably just love it anyway. This Classic 45 year old vintage Sony hi-fi system just came in for it’s first service – in 45 years…!

And guess what – this beautiful Sony hi-fi system now works perfectly again, after service.… Read more

Beautiful Yamaha CA-2010 Integrated Amplifier Repair & Restoration

Yamaha’s beautiful CA-2010 must be one of the best-looking integrated amplifiers of all time. Come with me in my last article of 2018, as I explore, repair and restore this classic beast.

The Yamaha CA-2010 integrated amplifier is just beautiful and Yamaha knows it. In fact, this aesthetic works so well that Yamaha recently introduced a whole range of high-end products that mimic these classic looks, almost to a tee!… Read more

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 beast.

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

Accuphase P-600 Monster Stereo Power Amplifier Voltage Conversion

Holy balls, the Accuphase P-600 Stereo Power Amplifier is one B-I-G mother of an amplifier. It actually gets physically tiring moving these beasts around the workshop!

Anyway, I’m not complaining, I LOVE working on equipment like this, even if it is heavy and the work slow. The Accuphase P-600 was, as far as I recall, Accuphase’s best class A/B stereo power amplifier back around the early 80’s.… Read more

Shocking Latest Krell & H/K Hall of Shame Additions

These latest additions to the Hall of Shame are two of the worst cases of hi-fi electronics bodgery I’ve ever seen. The destruction of this Krell KRC preamp by a so-called expert must be seen to be believed.

What follows are snippits from my latest Hall of Shame cases. Visit my Hall of Shame for all the horrifying details, more photos and more detailed descriptions, plus even more cases.… Read more

Sony TA-4650 VFET Amplifier Service & Reliability Enhancement

I’m reluctant to use the word ‘sexy’ when it comes to hi-fi gear because, well – it just feels weird. If I were to use it though, it would be about this baby Sony TA-4650 VFET amplifier.

What can one say after working one of these stunning Sony TA-4650 VFET integrated amplifiers? I really fell for this little beauty and came to understand why so many people treasure these amps.… Read more