Category Archives: Amplifiers

Articles about amplifiers, big and small, solid-state and tube.

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

Luxman SQ-202 Integrated Amplifier Repair & Service

I get to work on some beautiful gear at Liquid Audio. A great example is this stunning Luxman SQ-202 integrated amplifier that I’ve just repaired and serviced.

The Luxman SQ-202 integrated amplifier is a model dating right back to the early 70’s. In fact it was released 1970, and produced until 1973.

Classic, understated early Luxman styling.
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Krell KAV-300i Integrated Amplifier Repair & Restoration

I’ve just repaired and restored this lovely Krell KAV-300i integrated amplifier. Read on to find out how I did all that, and why the KAV-300i is such a superbly engineered amplifier.

Krell still proudly builds amplifiers and other high-end gear, from their base in Orange, Connecticut, USA. Established in 1980, they set about manufacturing a range of really different hi-fi equipment, aimed squarely at the top end of town.… Read more

Accuphase E-202 Integrated Amplifier Restoration

I recently overhauled and restored this stunning Accuphase E-202 integrated amplifier. Read on for all the details.

Firstly, my apologies for the delay in bringing new content like this article on the Accuphase E-202 to my site. My hi-fi repair and restoration business here in Perth has been incredibly busy, I barely have time to even respond to inquiries at the moment!… Read more

A Look Inside the Sansui AU-919 Integrated Amplifier

A very quick update to give you a look inside a stunning and very rare Sansui AU-919 integrated amplifier I’ve just serviced.

There’ll be a full article coming soon, but in the meantime, enjoy this look inside the amazing Sansui AU-919!

Specifications (Courtesy of the HiFi Engine)

Power output: 100 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.008%
Damping factor: 100
Input sensitivity: 0.1mV (MC), 2.5mV (MM), 150mV (line)
Signal to noise ratio: 74dB (MC), 90dB (MM), 100dB (line)
Channel separation: 75dB (MM), 70dB (MC), 80dB (line)
Output: 150mV (line), 1V (Pre out)
Speaker load impedance: 8Ω (minimum)
Dimensions: 430 x 168 x 428mm
Weight: 21.4kg
Year: 1978… Read more

Quad 405 Power Amplifier Service & Refresh

Visitors to my site will already know how much I like the Quad 405. A recent conversation with a customer inspired him to acquire some Quad gear, including this lovely, original 405. In this article, I cover servicing a Quad 405, the Liquid Audio way.

Talk about great sounding amps, and this particular 405 is completely original, with its original capacitors and connectors.… Read more