no_lo_fy
11-04-2015, 09:10
Hi,
Time has come to sell my DIY FirstWatt F5 clone, running 28Wpc into 8Ω. Built by my own “fair” hand around 3 years ago. But I fancy giving the Hypex route a go, so I have to sell.
(I’m conscious of the ‘ethical’ nature of making any money from someone else’s design - so the asking price is less than it cost me in components. I’m not trying to make money off the back of Nelson Pass’ generosity)
The amp sounds (genuinely) fantastic - it is not really surprising that it is so popular amongst DIYers. I have no way to know how it sounds compared to an original Nelson Pass built one, but I have had a lot of very satisfied listening - I didn’t deviate from the original design, so I can’t imagine it is much different.
The amp is set up as per an original and will work like any other amp with no need to fiddle if you don’t want to! (It is biased to ~1.3A idle current, as per specs, and DC offset never exceeded 4mV on either channel when I checked over a ~10 minute period last night). I am very happy with my build standard (see pics), and have never had any reliability issues - worked perfectly from first switch on and never any failures. What I am trying to say is this should be just as reliable and easy to use as a commercial amp - BUT at the end of the day was built in my study and any buyer must understand that. There are no marks or scratches that I can see.
The bad:
It has some mechanical hum from the transformer. I have it bolted down on semi-rigid foam which means it becomes inaudible at about a foot or so away, but the amp is best not thrown around in this setup. Bolted down hard to the case it is heard at 2-3 feet in a silent room.
It also has some ground hum, audible again a foot or so away on my 88dB speakers.
All this is inaudible from a listening seat.
I don’t want to test it against the rigours of the postal system, so I offer to deliver it locally (Northumberland, Newcastle, Sunderland, Durham, Carlisle etc) within the price. Further afield, hopefully we can sort something out.
Price is £400
Thanks for looking!
(sorry - I only seem to be able to attach 4 images)
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Time has come to sell my DIY FirstWatt F5 clone, running 28Wpc into 8Ω. Built by my own “fair” hand around 3 years ago. But I fancy giving the Hypex route a go, so I have to sell.
(I’m conscious of the ‘ethical’ nature of making any money from someone else’s design - so the asking price is less than it cost me in components. I’m not trying to make money off the back of Nelson Pass’ generosity)
The amp sounds (genuinely) fantastic - it is not really surprising that it is so popular amongst DIYers. I have no way to know how it sounds compared to an original Nelson Pass built one, but I have had a lot of very satisfied listening - I didn’t deviate from the original design, so I can’t imagine it is much different.
The amp is set up as per an original and will work like any other amp with no need to fiddle if you don’t want to! (It is biased to ~1.3A idle current, as per specs, and DC offset never exceeded 4mV on either channel when I checked over a ~10 minute period last night). I am very happy with my build standard (see pics), and have never had any reliability issues - worked perfectly from first switch on and never any failures. What I am trying to say is this should be just as reliable and easy to use as a commercial amp - BUT at the end of the day was built in my study and any buyer must understand that. There are no marks or scratches that I can see.
The bad:
It has some mechanical hum from the transformer. I have it bolted down on semi-rigid foam which means it becomes inaudible at about a foot or so away, but the amp is best not thrown around in this setup. Bolted down hard to the case it is heard at 2-3 feet in a silent room.
It also has some ground hum, audible again a foot or so away on my 88dB speakers.
All this is inaudible from a listening seat.
I don’t want to test it against the rigours of the postal system, so I offer to deliver it locally (Northumberland, Newcastle, Sunderland, Durham, Carlisle etc) within the price. Further afield, hopefully we can sort something out.
Price is £400
Thanks for looking!
(sorry - I only seem to be able to attach 4 images)
14432
14429
14430
14434