2X50Watt TK2050 board

[aussiebuddha]

Does anyone know any good board that has 2x50watt using the tk2050?
I've seen plenty of 2x100watt including the sure, but I dont really need 100watt per channel, and I could save some money on the board itself (though not much) but more importantly saving money on the PS, and being able to use a smaller enclosure.

[col]

I wouldn't bother with the "savings" just turn the volume control down a bit. Have you looked at the excellent range of TK2050 on the hifimediy.com site? Also, if you want a smaller PSU match it with a Connexelectronic.com SMPS.

col.

[sharpi31]

Don't worry - the popular Sure TK2050 board is not really 2x100W. It's more like a 50W amp. Check the manual: http://www.sure-electronics.net/down..._Ver1.0_EN.pdf

The Sure amp and a Meanwell SMPS (24-30V) will be an excellent cheap combination. My understanding is that the Hifimediy amp with Connexelectronic SMPS is better but a bit more money.

[aussiebuddha]

thanks guys.

I think I might go with the sure electronics at this stage (and maybe mod it in the future)

Reason being mainly that they have a case specially made for this board + the volume control, and this would be an easy way to get an amp running with minimal work, just assemble and run, no soldering needed (until I decide to mod it)

the only problem is their shipping price.
to australia, for the whole kit (with board+volume control+case+SMPS) its about $50!

[col]

I have both the sureelectronics and the Hifimediy. Unless you need the instant gratification I would recommend the HifiMediy, it has much better components and speaker protection. Also, the meanwell SMPS don't last that long before they start wearing thin. Go read the various diyaudio threads.

[aussiebuddha]

So the meanwells are a nogo? My impression from reading the sure tk2050 thread was they were good.. (I'd prefer to buy one from hifidiy with the 2050 board to save on postage, thats all)

[sharpi31]

Not all Meanwell SMPS are created equal - most people seem to have used the cheaper ones with 25KHz switching frequency and cheap components. I've used two SP range Meanwells that switch at 100Khz and have Rubycon caps etc. Both have worked flawlessly for many months (with fans disconnected to reduce background noise).

[goosewing]

Originally Posted by sharpi31

Not all Meanwell SMPS are created equal - most people seem to have used the cheaper ones with 25KHz switching frequency and cheap components. I've used two SP range Meanwells that switch at 100Khz and have Rubycon caps etc. Both have worked flawlessly for many months (with fans disconnected to reduce background noise).

From what has been said over on the Class D forum the Meanwell supplies from Hifimediy are indeed the older 25KHz design but are genuine product not one of the Chinese ebay specials, so build quality and reliability should be good. Folks seem happy with them although, for more money, there are of course more compact and higher performing supplies.