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Digital amplifier repair (Flying Mole) - help needed

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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Dan B » Wed Dec 14, 2011 2:08 pm

Indeed! Let us know how it works out. I take it that it's this one:

http://classdaudio.com/products/complete-amplifiers-1/magic-garden-mastering-amplifier.html
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Martin Walker » Wed Dec 14, 2011 6:22 pm

It’s certainly $600, but what an odd design!

Completely blank front panel and gain controls on the rear :headbang:


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Re: Digital amplifier repair (Flying Mole) - help needed

Postby James Perrett » Thu Dec 15, 2011 12:39 pm

I guess that they expect most users to have a mixing desk or monitor controller so that the gain controls are just there to match the amp sensitivity to whatever else you are using. Some of us use amps with no gain controls - although I've made a small attenuator box to go inline for my monitor amp.

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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Dan B » Thu Dec 15, 2011 5:16 pm

I guess so. Still, a pain adjusting the trims on the back of a rack. At least it's a "set once and forget" thing. I'm using a hi fi pre-amp with my Moles (discontinued s/h Cambridge Audio C500 - probably sacrilegious but I was struggling to fund - or justify - paying a lot more for a volume control).

The ebay Moles went for £430 odd including postage. And only one of the pair was working properly. I wasn't prepared to stretch to that: I paid less than that for a brand new pair. Since I actually have 4 Moles (only 3 working) and 2 sets of PMC TB2s's with 2 CA C500 pre's (studio set and live room/living room set). So I suspect I'll keep the third Mole as a spare (I gather quite a few class d amps have reliability issues in the longer term) and look for a new amp.

I'd be interested to hear about the $600 one above (probably the best part of £600 once import duty, VAT, shipping and handling all accounted for). Perhaps even more tempting (based on favourable reviews - e.g. http://www.audiocircle.com/index.php?topic=76400.0 - and low price) is this: http://classdaudio.com/index.php/120w-x-2-240w-x-1-amp-power-supply-transformer.html

Any thoughts / comments?

I'm struggling to imagine that any traditional class A/B or tube amp offers as much bang for buck, but do let me know if I'm wrong here.
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby forumuser695516 » Thu Dec 15, 2011 6:34 pm

^ Thats partly why I went with Hypex. They are dutch, so no import duty/taxes to worry about. And from what I could gather at the time, they seemed to have about the best reputation going for Class D kit. Which in turn also means they are not the cheapest. But still a bloody good amp for the money.
I guess it could self detonate some time, but so far so good (1.5 years or so)
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby James Perrett » Fri Dec 16, 2011 11:39 am

The specs on even the cheapest Hypex amps are much better than the ClassDAudio ones. While paper specs don't mean everything, there are so many mastering engineers using them that I'd say they're a safe bet.

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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Paulusuk » Fri Dec 16, 2011 4:03 pm

Hi Dan B
If you are still looking at repair for amp maybe this might be of use to you....

http://www.freepatentsonline.com/6992527.html

All the best
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Dan B » Mon Jan 07, 2013 6:53 pm

Belated thanks for the diagram. One of my other Flying Moles has also developed the same fault, so now I have a pair to repair. If anyone knows who might be able to repair a digital amp (and that link above may well help), please do let me know. My aged Pioneer A400 has been pressed into service in the meantime, but it's not really cutting it!

Many thanks,

Dan
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby JonSnell » Sat Jan 25, 2014 1:37 am

I have just completed my 100th Flying Mole Amplifier repair and have achieved 100percent success.
www.flyingmole.co.uk
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Hugh Robjohns » Sat Jan 25, 2014 1:48 pm

Good to know, Jon, and welcome to the SOS forums.

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Re: Digital amplifier repair (Flying Mole) - help needed

Postby JonSnell » Sat Jan 25, 2014 3:26 pm

Thank you.
Hopefully I can assist with my 50 plus years of electronics based experience.
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Martin Walker » Sat Jan 25, 2014 6:16 pm

I suspect you can, and you'll be a popular person here by the sound of it ;)

Welcome to the SOS FOrums Jon! 8-)


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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Folderol » Sat Jan 25, 2014 6:24 pm

Always nice to see another {cough} mature {cough} techie on here. There are too few of us about!

Never really got into class D amps myself - had my fingers burned too many times with switch mode PSUs :frown:
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Dan B » Mon Jan 27, 2014 4:46 pm

JonSnell wrote:I have just completed my 100th Flying Mole Amplifier repair and have achieved 100percent success.
www.flyingmole.co.uk

Jon managed to repair both of my failed Flying Mole - much appreciated and highly recommended by me!
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Martin Walker » Tue Jan 28, 2014 6:23 pm

Dan B wrote:
JonSnell wrote:I have just completed my 100th Flying Mole Amplifier repair and have achieved 100percent success.
www.flyingmole.co.uk

Jon managed to repair both of my failed Flying Mole - much appreciated and highly recommended by me!

Hooray, and three cheers for Jon 8-) 8-) 8-)


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Re: Digital amplifier repair (Flying Mole) - help needed

Postby ESE » Mon Mar 10, 2014 4:48 pm

JonSnell wrote:I have just completed my 100th Flying Mole Amplifier repair and have achieved 100percent success.
www.flyingmole.co.uk

One of the flying moles in my PMC TB2s started distorting badly. Jon has fixed it. Very pleased with the service. :)
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Martin Walker » Tue Mar 11, 2014 11:18 am

:thumbup:


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Re: Digital amplifier repair (Flying Mole) - help needed

Postby Dan B » Tue Mar 11, 2014 1:01 pm

He's just fixed another for me too. He's also built a rather clever switch for me - I'll post more on that in a month or two. Excellent service; highly recommended!
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Re: Digital amplifier repair (Flying Mole) - help needed

Postby samlogic30 » Sat Nov 17, 2018 6:24 pm

I can repair Flyingmole amplifiers. For the basic distortion problems is a fairly easy repair.

Thanks ,
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