Hum and woofer oscillation

Q: Colin – help required please! Hum and woofer oscillation… I have just rearranged my system and entire room. This has lead me to run my Pioneer PL-707 with Denon DL-301II through an AU-320 SUT to my (freshly recapped) Accuphase C-200 and on to my little Cayin TA30. It’s the smallest amp I have and […]

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Do slow blow t2 250v fuses blow for no reason?

Hi Colin. Just had a crackle in a left channel (nothing you’ve built by the way), fade to nothing, then that stench of death. Took the lid off my Crimson mono (a simple oblong) and all looks healthy in fact like new, the only thing that’s gone is the fuse. Could it be a mains […]

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Step-down transformers with unchanged mains frequency?

Hi Colin, Pls can you help me? Can I safely run a USA spec amp designed for 110v 60Hz in the UK on 240v 50Hz, with a step down transformer (but it will still be 50Hz). So many conflicting views across the web. I think a lot of people believe it can work ok the […]

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Passive preamps, the downside.

Hello Colin. I’m sure you’re aware of passive preamps such as Music First. I don’t think you’ll sort person to comment negatively on a particular brand but I do wonder what your views are on such devices? Not wishing to anticipate your answer, I’ve listened to the MF device and been very impressed by the […]

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Howard Popeck speaks at length to people with interesting things to say: Colin Wonfor (Inca Tech, Magnum, Proac-Magnum, T.O.C.A, Naim and Tellurium Q) sets the record straight (Part #2)

Hello again Colin. I guess you hold a couple of patents, possibly quite a few. in layman’s terms – if indeed such a thing is possible – can you explain what these are and perhaps their significance in the audiophile world? Crickey Howard, some of those got back a bit and now and are out […]

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COLIN WONFOR: Howard Popeck speaks at length to people with interesting things to say: Colin Wonfor (Inca Tech, Magnum, Proac-Magnum, T.O.C.A, Naim and Tellurium Q) sets the record straight (Part #1)

The image above is one of just six gold plated issues. Note: This was originally published here in April 2015 Neil McCauley (HFA editor in chief) writes an introduction: Colin was and remains one of the UK audio industry’s gentlemen. No one in our office has heard a negative comment about him nor a negative […]

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COLIN WONFOR: M50 power amplifier test review

Alan Brown writes: Since when will an amplifier sound better the louder it plays? Sure, louder can be more exciting, more visceral, but usually there’s a point where things get ‘ragged’. This can manifest as harshness, sibilance, collapse of soundstage or loudness. Yes, I said loudness, which seems to me to be an artifact of […]

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Amplifier buzz even when power switch is off!

Dear Colin, I need some theories and hopefully answers please. This is a situation, neither I, not anyone who I asked, have encountered before. It is very simple and puzzling at the same time. Here it is: There is a faint buzz coming from the amplifiers, NOT the speakers, barely audible from a few feet […]

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COLIN WONFOR: HB100 mono power amps test review

Neil McCauley / editor in chief Why no images? Because the test review that follows here are of a pre-production pair in casework that doesn’t properly represent the finished product which, so we are told, should be available in early March 2017. Priced, including VAT @ £4.6k per pair. A bit of history Please note […]

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COLIN WONFOR: MC-V power cord (silver plated pins) test review

Neil McCauley / editor in chief There’s an old saying that you can judge a person by the company they keep. It’s a truism and a cliché but that doesn’t mean it’s incorrect. Applied to the hi-fi industry, you can make a reasonable stab at the true nature (behind the carefully crafted façade) of the […]

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