Velleman K4010

[Filterlab]

Stumbled upon this auction on ebay and did a little digging: Velleman K4010 300w Mosfet mono amps (pair).

Anyone built a Velleman amp before, if so how good was it?

[StanleyB]

That's one of the best power amp kits I know of. It started as a project in Elektor magazine. They also did a 100W version 1st, which called the Cressendo. I actually started collecting some of the bits at one stage, but other projects got in the way. It uses the Hitachi MOSFETs that were also used in the Hitachi HA-7500 power amps. The HA-7500 is one of the best sounding amp to come out of Japan in the 80's, but very much under designed and under powered. The Elektor project was a fast improvement over the Hitachi design and showed what could be achieved with MOSFET. I don't think that the Elektor design has ever been bettered in even a commercially available MOSFET amp. The Velleman kit is the hardware from the Elektor project. If you like building power amp projects, you'll love completing this one. You can get some suitable heatsinks from RS to match the brute and create a gorgeous looking external finish. Forget fitting the VU meters that comes with the kit.

[greenhomeelectronics]

I have to agree with Sensimilia, we had one in stock a while back, it was a damn fine amp. the one we had used twin toroidal based psu's, the guy that bought it did a few mods and was delighted with it. It's pretty simple but well designed and pretty rugged.

[Filterlab]

Now that's interesting, may be worth picking up for a few quid and having a bash, not as a permanent amp replacement, but as a DIY job it could be fun and it doesn't look vastly complicated.

[StanleyB]

Just observe the appropriate anti static precautions when handling the MOSFETs. Don't be fooled by the apparent simple design. The differential input stage and fully complementary design offers some eye watering performance. The dual toroidal power supply for each channel is the most advanced transformer layout and wiring I have ever seen in any power amp. If you take the time to do a good job on the case design that you are happy with you could be in for a treat.
Go to http://www.schaeffer-ag.de/index.php?id=97&L=1 for some great inspiration on your own case design and free software to design your own front panel etc.

[Filterlab]

Cool, cheers for that. I may just have a go, I have an anti-static strap from when I swapped a load of components in the works PCs. Cheers for the link too, some nice gear on there. Oooo, my DIY juices are flowing.

[Vinyl Grinder]

Go to http://www.schaeffer-ag.de/index.php?id=97&L=1 for some great inspiration on your own case design and free software to design your own front panel etc.

Those pannels are first rate.I had a load made for a modular synthersizer rig i once made..I think Myst used to use these for there amp facias..tad pricey but worth it.

[Filterlab]

Yeah they look very nice, and a power amp may demand more than a cherry box and four slices of beech.

[StanleyB]

My apologies for the cost, time and effort my replies could well be costing you.

[Vinyl Grinder]

Yeah they look very nice, and a power amp may demand more than a cherry box and four slices of beech.

Here goes rob Myst pre, i'm positive this is a Schaeffer front pannel