Category Archives: Restorations

Restorations is a category of article where the overall theme is a complete restoration of a piece of hi-fi equipment. These jobs are very involved and restorations are therefore typically my longest articles.

Marantz SM-80 Amplifier Repair & Restoration

In this second of two articles on the Marantz SC-80 preamplifier and SM-80 power amplifier, we look at the SM-80 power amplifier. Specifically I detail the work required to restore this amplifier back to full working condition. The earlier article looks at work done to matching Marantz SC-80 preamplifier.

The Marantz SM-80 stereo power amplifier is a reasonably powerful, well-made, mid-range consumer amplifier from around 1990.… Read more

Luxman M-4000A Amplifier Restoration

A customer recently brought in his gorgeous matching Luxman M-4000A power amplifier and C-5000A preamplifier. Both pieces needed a thorough overhaul and the M-4000A needed repairs also.

The legendary Tim De Paravicini designed the original M-4000. The improved and even rarer Luxman M-4000A probably also came from De Paravicini’s hand, but nobody seems to know for sure.… Read more

Pioneer SX-1250 Monster Receiver Repair & Restoration

A lovely customer of mine named Frank rang me to tell me that his beloved Pioneer SX-1250 monster receiver had died in a cloud of acrid smoke. Naturally he was devastated, and he asked me if I could restore the old beast for him.

The Pioneer SX-1250 is a monster receiver in the truest sense of the term.… Read more

Thorens TD-125 Turntable Repair & Restoration

I was at an old friend’s place recently, chatting to his father, who is very ill. Neil had always been a music lover and after chatting for a while, I saw that his cherished Thorens TD-125 Mark 2 was languishing, non-functional, in a pile of dust and dirt. 

The Thorens clearly hadn’t been operational in a long time and when my Neil expressed disappointment that he wasn’t able to play his records any more, I decided at that moment to completely repair and restore it for him, hopefully finding the fault that had put it in the corner in the first place.… Read more

Krell KSA-150 Amplifier Repair & Restoration

This video documents my comprehensive overhaul and restoration of a gorgeous Krell KSA-150 class-A power amplifier.

This wonderful KSA-150 developed a serious fault at some point in the past. This had been quickly fixed and was sold to me in very poorly repaired condition. Because of this, I decided to completely overhaul the amplifier and restore it back to factory condition, using original spec or better parts.… Read more

Sansui AU-717 Integrated Amplifier Repair & Restoration

I recently restored a gorgeous Sansui AU-717 integrated amplifier. This AU-717 was not running properly and was in serious need of some TLC.

The Sansui AU-717 integrated amplifier is one of those pieces that I just love working on. Sansui designed and built the AU-717 at a time when labour was cheaper. Money went into build quality, parts and layout.… Read more

Krell KSA-150 Class-A Power Amplifier Restoration

A couple of years back I performed a comprehensive tear-down, overhaul and upgrade of my gorgeous Krell KSA-150 power amplifier. I made a video of it, which you are most welcome to check out.

There’s not much you can buy that can touch the performance of a class A amplifier of this quality – let’s face it – the Krell KSA-150 was ten grand – in the early 90’s!… Read more