[Jesse] sent in this beautiful 300 watt amp project. It uses six LM3886 amps to create a pair of 150 watt amps that are bridged to create a single 300 watt amplifier. Usually I don’t mind my lack of multi-language ability, but many of the parts were sourced from this site. It looks like the cases were bought in Hong Kong, anybody know were I could get some in the US?
i built this amp with two modules each holding two instead of three lm3886 with only 5% tolerance resistors but its quality is still much better than all commercial amps i ever heard…
Posted at 2:24 pm on Aug 14th, 2007 by gruni
What about cost to build?
Posted at 3:19 pm on Aug 14th, 2007 by Coni
I saw Bob Pease do a presentation on these integrated amp modules about half a year ago; they’re really nice. He mentioned that an audiophile equipment manufacturer had asked them to make a batch that was gold-plated (so they’d look a little less out-of-place driving a $n,000 amp, no doubt).
Posted at 3:21 pm on Aug 14th, 2007 by rak0ribz
I find it a little funny that for all the precision going into the design to get “audiophile” quality, he uses a cheap Behringer mixer and Creative Labs audio card to do his testing.
-don’t get me wrong, those brands DO have their place. I use them myself. Just thought it odd.
Posted at 7:09 pm on Aug 14th, 2007 by Aud1073cH
Very nice
Posted at 8:52 pm on Aug 14th, 2007 by ASM
here is the link for the translated page (http://www.diyzone.net/). Chinese to English. It’s not perfect but it sure helps ;-)
http://www.google.com/translate?u=http%3A%2F%2Fwww.diyzone.net%2F&langpair=zh%7Cen&hl=en&ie=UTF8
Posted at 1:51 pm on Aug 15th, 2007 by jonathan
The translate button in the Google toolbar for FireFox makes for almost effortless translation. Of course I have no clue as to how accurate the translation is.
Posted at 2:04 pm on Aug 15th, 2007 by static
i kneed to make a 7000wat amp any suggestions
Posted at 3:37 pm on Aug 15th, 2007 by Alex mccown
Does anyone have _any_ idea how much this or it’s constituent parts costs?
Posted at 6:47 pm on Aug 15th, 2007 by slob
slob, you can look up most of the equivalent parts on digikey.com to get a quick idea. The “audiophile” brand components will obviously drive up the cost a huge amount though.
Heres some quotes/estimates with decent parts (price for one item):
6x LM3886 $5.40
2x RCA jack ~$2
4x binding post ~$2
10x 1200uF 50V low esr $1.33
2x 47000uF 40V $14
2x 15uF Poly 400V $8
6x 0.2ohm 2W 1% $2
1x 500VA Toroidal $110 (can source cheaper on ebay, or use a standard core).
xx other smd components, caps, switches, jacks etc. ~$70+
2x heatsink $40 (or less surplus/used)
1x case: price unknown, you can gut something used for next to nothing, or spend hundreds.
4x double sided PCBs: maybe 50sq inches total, $100 would get you enough boards for two amps
Total? approx $500. More if you bought a case and fancier parts, less depending on parts quality.
Or if you are like me you have most of this stuff laying around… :P
Posted at 10:42 pm on Aug 15th, 2007 by japroach
i payed about 100⬠(about 135$US) without the case, what is still a great problem ^^
Posted at 5:37 am on Aug 16th, 2007 by gruni
Do you know what is going on. I’ll have a double expresso, with brown sugar cubes.
Posted at 6:00 pm on Aug 17th, 2007 by nathan belomy
im looking for a nice 500 watt rms monoblock subwoofer amp, i wann get the parts and bild it myself. any sugestions?
Posted at 9:24 pm on Aug 17th, 2007 by petey
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The store the parts were bought from is in Taiwan. If you are interested in buying any of their kits, they appear to ship to other countries. I’m sure the readers who understand mandarin and myself would be happy to help you place an order.
Posted at 12:52 pm on Aug 14th, 2007 by Cryptopath