krell service

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Amazing Krell KRC-HR Preamplifier Restoration

Come with me as I repair and restore one of the greatest solid-state preamplifiers of all time, the magnificent Krell KRC-HR. If you’re reading this, you’ve probably heard of Krell and know something about the incredible range of premium, industrially constructed gear they made throughout the 1980s and 1990s. The Krell KRC-HR preamplifier is certainly […]

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Krell KAV-300i Amplifier Repair & Restoration

I’ve just repaired and restored this lovely Krell KAV-300i integrated amplifier. Read on to find out what makes the KAV-300i 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,

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Class A Amplifiers and the Krell KSA-150

Regulars will know how much I love Krell’s class A amplifier designs. The Krell KSA-150 power amplifier is a great example. Updated, 2026! In this article, I discuss the basics of class A amplifiers, with particular reference to the gorgeous KSA-150. You may have already watched my restoration video, where I completely refurbish one of

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