$175 Class D amp--120 wpc

jtwrace · « **Reply #60 on:** 23 Jan 2010, 01:17 am »

got my 600w today. Should have it up and running by the end of the weekend.

Nick77 · « **Reply #61 on:** 23 Jan 2010, 01:25 am »

Got my 120 watt today also but still waiting for transformer. Hopefully have my up and running sometime this weekend also if trans arrives.

I made a bamboo case to house my amp till something better materializes.

poseidonsvoice · « **Reply #62 on:** 23 Jan 2010, 01:40 am »

Looking forward to it fellas!

I've been in discussions with them for an amp that puts out 500 watts/8 ohms and 750 watts into 4 ohms. Talk about dirt cheap power. Looking for subwoofer power! Looks like it can all be done for about $500. $400 for the amp/transformer itself, and $100 for the case/connectors/etc...
Best,
Anand.

ohenry · « **Reply #63 on:** 23 Jan 2010, 01:43 am »

Quote from: Niteshade on 17 Jan 2010, 01:21 am

Look here: http://www.radiodaze.com/

Go to their "components" tab.

Thanks for this link, I'm trying one of these for another project and need some radio goodies as well.

steve k · « **Reply #64 on:** 23 Jan 2010, 05:34 am »

Quote

Got my 120 watt today also but still waiting for transformer. Hopefully have my up and running sometime this weekend also if trans arrives.
I made a bamboo case to house my amp till something better materializes.

Looking good Nick. You should put a piece of white plex on top when you're done. The blue LED's on the PS are ultra brites and they'll light up the whole room!

I'm anxious to hear what you guys think of this little puppy.

Regards,
steve

steve k · « **Reply #65 on:** 23 Jan 2010, 05:34 pm »

Here's another case built by my buddy Mark. The face is spalted maple and the feet are cherry turned by Bob, the lathe master.

jtwrace · « **Reply #66 on:** 24 Jan 2010, 02:35 pm »

Quote from: steve k on 16 Jan 2010, 06:49 pm

steve

Can we see the wires (red / black) that you have tucked under the board? Why do you have them going under? Picture?

timind · « **Reply #67 on:** 24 Jan 2010, 02:50 pm »

Anybody actually listening to these yet? How do they perform? Curious minds want to know.

macrojack · « **Reply #68 on:** 24 Jan 2010, 05:04 pm »

jtwrace - I'm guessing here but I believe the red and black wires going under the board emerge on the top side wrapped in grey sheathing. They are probably the AC line running to the wall outlet. No?

The RCAs are the inputs and the red and white wires are the speaker leads.

doug s. · « **Reply #69 on:** 24 Jan 2010, 05:09 pm »

Quote from: macrojack on 24 Jan 2010, 05:04 pm

jtwrace - I'm guessing here but I believe the red and black wires going under the board emerge on the top side wrapped in grey sheathing. They are probably the AC line running to the wall outlet. No?

The RCAs are the inputs and the red and white wires are the speaker leads.

what he said.

doug s.

steve k · « **Reply #70 on:** 24 Jan 2010, 07:47 pm »

Yes the red and black wires coming off the transformer go to an IEC that I have the power cord plugged into. They're just tucked under the board to get them out of the way. I didn't want hot leads exposed where inquiring cats might sniff.

Remember, this was just a temporary setup.
steve

mcgsxr · « **Reply #71 on:** 24 Jan 2010, 07:52 pm »

I am a little confused - I see a thread about an amp that is 120wpc, and then people talking about sub amps. I will be shopping for a sub amp in the not too distance future, thus my desire to clarify.

Does this amp produce 240wpc at 4 ohm when bridged?

I see there are $169 BASH 300w sub amps (and I have been using one since 1999), so I am not sure why this one would be better as a sub amp?

Nick77 · « **Reply #72 on:** 24 Jan 2010, 08:14 pm »

I think under normal circumstances these wouldnt be used as a sub amps but Anand is a bassaholic.

Quote from: mcgsxr on 24 Jan 2010, 07:52 pm

I am a little confused - I see a thread about an amp that is 120wpc, and then people talking about sub amps. I will be shopping for a sub amp in the not too distance future, thus my desire to clarify.

Does this amp produce 240wpc at 4 ohm when bridged?

I see there are $169 BASH 300w sub amps (and I have been using one since 1999), so I am not sure why this one would be better as a sub amp?

jtwrace · « **Reply #73 on:** 24 Jan 2010, 08:23 pm »

Quote from: steve k on 24 Jan 2010, 07:47 pm

Yes the red and black wires coming off the transformer go to an IEC that I have the power cord plugged into. They're just tucked under the board to get them out of the way. I didn't want hot leads exposed where inquiring cats might sniff. Remember, this was just a temporary setup.
steve

Thanks!

steve k · « **Reply #74 on:** 24 Jan 2010, 08:47 pm »

Quote

I am a little confused - I see a thread about an amp that is 120wpc, and then people talking about sub amps. I will be shopping for a sub amp in the not too distance future, thus my desire to clarify.

Does this amp produce 240wpc at 4 ohm when bridged?

I see there are $169 BASH 300w sub amps (and I have been using one since 1999), so I am not sure why this one would be better as a sub amp?

This amp's output is 60 watts per channel into 8 ohms, 120 wpc into 4 ohms, 240 wpc bridged into 8 ohms. Tom doesn't recommend running his amps bridged into 4 ohm loads.

As for sub amps, he has kits up to 500 wpc bridged for $189 up to a 1000 wpc into 8 ohms stereo amp for $375.
steve

Steidl Guitars · « **Reply #75 on:** 24 Jan 2010, 10:23 pm »

Nice to see these getting finished; they look great. Based on the comments here, I ordered one (125 watt in 8 ohm version) that should ship next week. Tom has been very helpful.

A few questions about appropriate wire for those with some amp-building experience as I have none.

Wire to carry power?
Wire from the pre-amp inputs to the amp module?
Wire from the amp module to the speaker outputs?

I know this is a can of worms, but since I have to buy it all anyway, I'm hoping for some recommendations.

My guess is that the wire to the torroid and between the power supply and the amp module should beefy (14-16 gauge?), and the wire from the inputs small (20-24 gauge?). No idea as to wire to the outputs.

General tips?

Thanks

steve k · « **Reply #76 on:** 24 Jan 2010, 10:30 pm »

Until you get the amp kit in a case with real binding posts, the little blue screw connectors will take up to a 14-16 ga. wire. I used 14 ga. silver plated copper wire for all the PS/amp board connections on the breadboard version. Speaker wires (the red and white ones were 16 ga.). Amp board to preamp--you can use any IC you want. If you have speaker cables with spade connectors, you might be able to slide one tong of the spade into the screw connectors on the amp board. I did this for awhile until I had it in a case.
steve

Nick77 · « **Reply #77 on:** 24 Jan 2010, 10:40 pm »

Color me confused

I dont know what i have now, i thought i was getting 120 into 8ohms???

Quote from: steve k on 24 Jan 2010, 08:47 pm

This amp's output is 60 watts per channel into 8 ohms, 120 wpc into 4 ohms, 240 wpc bridged into 8 ohms. Tom doesn't recommend running his amps bridged into 4 ohm loads.

As for sub amps, he has kits up to 500 wpc bridged for $189 up to a 1000 wpc into 8 ohms stereo amp for $375.
steve

steve k · « **Reply #78 on:** 24 Jan 2010, 10:52 pm »

Nope. If you want 125 wpc into 8 ohms you need this amp. http://classdaudio.com/index.php/class-d-audio-amplifiers/home-and-pro-class-d-audio-amplifiers/class-d-power-amplifier-250w-x-2-500w-x-1.html
As I said, Tom's website is a bit of a mess. Some amps he lists the 4 ohm load first, others the 8 ohm load. Some he just lists outputs and no impedance loads. You're best off shooting him an email and telling him what you want and he'll get you set up with the right amp. Sorry for the confusion.
steve

avionic · « **Reply #79 on:** 25 Jan 2010, 12:03 am »

I have had the 125x2 8ohm version of the class d audio amp up and running for a few months now and I am really pleased with it. It sounds great and was very easy to get up and running. As mentioned earlier Tom from class d audio is extremely helpful and will answer all your questions quickly. IMO this is an extremely nice amp for the$$. I have added a few links to the chassis,power inlet and wiring that I used.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250501444095&ssPageName=STRK:MEWAX:IT
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200424519369
http://stores.ebay.com/Johns-Silver-Teflon-Wire-Shop
http://classdaudio.com/index.php/class-d-amplifier-kits/home-kits/250w-x-2-500w-x-1-amp-power-supply-transformer.html