Amplifiers

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

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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 …

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The Redgum RGi120 Integrated Amplifier – Australian Quality? You Decide…

Redgum is an Australian brand I really wanted to be able to write great things about when I serviced and repaired this Redgum RGi120 integrated amplifier. Sadly, I couldn’t. At the risk of fanboys and other ill-informed folks coming after me, I decided to post the truth about what I found inside this Redgum RGi120 …

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The Sansui Corrosive Glue Problem

The infamous Sansui corrosive glue problem is one that affects many vintage hi-fi amplifiers and other equipment. Resolving the issues caused by this glue is time-consuming, but essential. You may be familiar with the scenario – over time, your favourite Sansui (or other) amplifier starts to develop faults. Maybe it won’t come out of protection, …

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Sansui AU-717 Integrated Amplifier Repair & Restoration

I recently restored a gorgeous Sansui AU-717 integrated amplifier in need of some serious TLC. Let’s take a look at what goes into a typical restoration and discuss these lovely amplifiers. 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 …

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Kenwood L-1000 Series – Exceptional Audio Components

I was recently asked by a customer to service and repair two of his gorgeous Kenwood L-1000 series components. In the lab this time were an L-1000T tuner and matching L-1000D compact disc player. All I can is wow! This gear is seriously well put-together and just beautifully engineered. In what was a great result, …

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Krell KSA-150 Class-A Power Amplifier Restoration

A couple of years back I performed a comprehensive tear-down, overhaul and upgrade of┬ámy gorgeous Krell KSA-150 power amplifier. I made a video of it, which you are most welcome to check out: UPDATE: It’s received over 100,000 views as of January 2022! There’s not much you can buy that can touch the performance of …

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