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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COLIN WONFOR: LS-XXV speaker cables test review

Colin wonfor has just sent us this review. Mike Tierny (Proclaim Audio) writes: Colin and Alan, thank you for the opportunity to audition Elsdon Wonfor Audio’s LS-XXV speaker cables for review. I must tell you, as a “certified cable nut”, I am mightily impressed. I have run the gamut of speaker cables over the past […]

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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’S TECHNICAL CLINIC: Male XLR plugs

QUESTION: I am needing to change the Aeco silver RCA plugs on one of my interconnects for some male XLR plugs. As it is a UP-OCC conductor, I am thinking of getting a plug with some silver plated pure copper connectors. My thoughts were with the ETI or Xhadow. What’s your opinion Colin? COLIN SAYS … […]

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COLIN WONFOR’S TECHNICAL CLINIC: How to judge an amplifier’s performance with a “powered-woofer” speaker?

QUESTION: Hello Colin, I can’t seem to find a definitive answer.  Nowadays, many speakers are made with a built-in woofer amplifier. Vandersteens, Martin-Logans , Von Schweikert, etc. How will an amplifier affect the tonality or dynamics of this type of speaker? COLIN WRITES … This is normally done to stop frequency interference of the high and low sounds, […]

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COLIN WONFOR’S TECHNICAL CLINIC: 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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COLIN WONFOR’S TECHNICAL CLINIC: Silver plated copper vs copper speaker wires? What’s better? Help!

COLIN WRITES … Ideally one would love to remove the effect of the capacitance completely but keep the Inductive coupling tight as it acts like a common mode choke helping to reduce non musical sound. With normal PVC webbing you have poor coupling. It can be done by loading the PVC with iron but it is too stiff […]

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AUDIOPHILE FUSES: Nonsense or what?

Hello experts. I have used audiophile fuses for years in various equipment without problem, generally appreciative of sound quality improvement. Recently, I’ve encountered problems with audiophile fuses blowing in my Coincident Turbo 845SE amplifier. At this point I’ve had two failures of Synergistic Red Quantum 6.3a 250v sloblo fuses in this amp. Recently I discovered […]

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COLIN WONFOR’S TECHNICAL CLINIC: 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’S TECHNICAL CLINIC: HIS new HB100 mono power amps

HP: Gentlemen, you’ve been designing amps and preamps for over 30 years. Is it still a challenge and ….. are you having fun? A: Colin has been designing electronic professionally for over 40yrs. He has done this for a living. His many designs include power control and power supplies Linear, Resonate, Switch Mode and even […]

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COLIN WONFOR’S TECHNICAL CLINIC: Ganged pots for the balance and/or volume controls?

Q: Hi Colin. When a amplifier or preamp has 2 ganged pots for the balance and/or volume controls which pot of the 2 is usually the left and right channel for stereo. Is there a standard for this? Meanwhile, greatly pleased to see you are striking out on your own, or at least NOT burdened […]

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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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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: Discusses his MC-V power cord

Editorial note: Written by Alan Elsdon and Re-engineered by Colin Wonfor (above) Q: Looking at the EWA power cord – your MC-V – it doesn’t look anything special. But knowing you, there’s clever engineering that’s gone into it and so a few questions if I may. Let’s start by looking at the topic through the […]

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COLIN’S TECHNICAL CLINIC: 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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DIY interconnects using Teflon braided hose

Hi Colin. I love your ‘clinic’. Neil promised that you might be offering education for us novices. So may I ask – have you ever thought about using braided hose to run your interconnects. I am talking about type usually found as brake lines on motorbikes and car braking systems, i was messing around with […]

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TECHNICAL: What really are computer grade parts?

Dear Colin, Computer grade parts? What are computer grade parts.. such as Computer grade power-supply caps? Are these type of parts an upgrade and/or better than audiophile grade parts? For example, I’ve heard some people say, “I’ve upgraded my power supply caps in my amp to computer grade caps”. I don’t think I’d want computer […]

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TECHNICAL: Popping noise on turn off

Q: Hello Colin. The unit in question is a Lafayette 4 channel decoder. When turning off my system, there is a popping noise from the rear speakers unless I turn the volume down on the decoder first (I’m only using the rear outputs). I’d like to eliminate the problem. I’ve searched bypass capacitor and coupling […]

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