$175 Class D amp--120 wpc

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mr_bill

Re: $175 Class D amp--120 wpc
« Reply #40 on: 17 Jan 2010, 01:09 am »
Can anyone recommend a place to purchase an aluminum amplifier case to put these amp board and transformer into?

Niteshade

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Re: $175 Class D amp--120 wpc
« Reply #41 on: 17 Jan 2010, 01:21 am »
Look here: http://www.radiodaze.com/

Go to their "components" tab.

Can anyone recommend a place to purchase an aluminum amplifier case to put these amp board and transformer into?

jtwrace

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Re: $175 Class D amp--120 wpc
« Reply #42 on: 17 Jan 2010, 01:59 am »
Look here: http://www.radiodaze.com/

Go to their "components" tab.

Blair,

Thanks for that resource.

poseidonsvoice

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Re: $175 Class D amp--120 wpc
« Reply #43 on: 17 Jan 2010, 03:32 am »
See here as well.

Best,
Anand.

jtwrace

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Re: $175 Class D amp--120 wpc
« Reply #44 on: 17 Jan 2010, 03:38 am »
See here as well.

Best,
Anand.

Very nice.   :thumb:  Wonder if the PCB and the Toridal will fit.  We'll find out!

steve k

Re: $175 Class D amp--120 wpc
« Reply #45 on: 17 Jan 2010, 03:43 am »
You can get the toroid dimensions here: http://www.antekinc.com/index.php These are the trannies Tom uses.

poseidonsvoice

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Re: $175 Class D amp--120 wpc
« Reply #46 on: 17 Jan 2010, 04:13 am »
Just checked. The PCB will. But the toroids are a little too tall! I was thinking initially of a 2 chassis case, with one chassis holding the amp pcb + ps pcb while the other would have the toroid.

Oh well.

Anand.

jtwrace

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Re: $175 Class D amp--120 wpc
« Reply #47 on: 17 Jan 2010, 04:15 am »

poseidonsvoice

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Re: $175 Class D amp--120 wpc
« Reply #48 on: 17 Jan 2010, 04:21 am »
You can try Lansing enclosures. You basically need at least a 3 inch internal height.

Off topic: The dB Audio Labs Tranquility dac uses a D-style enclosure it seems.

Best,

Anand.
« Last Edit: 17 Jan 2010, 09:23 pm by poseidonsvoice »

srb

Re: $175 Class D amp--120 wpc
« Reply #49 on: 17 Jan 2010, 04:37 am »
Although the classdaudio.com website works well mechanically, I am confused over much of the information.
 
It appears that all of the amps title descriptions are power output @ 4 Ohms.  But one model "Class D Power Amplifier, 250W X 2 - 8 Ohm" lists the output under Specifications as "Output: 250 X 2 - 8 Ohm, 250 X 2 - 8 Ohm"
 
What does that mean?  Can it not operate at 4 Ohm?
 
Under Features it says "Stereo or Bridged Configuration", but under Specifications it says "Bridged Output: Not Recommended"
 
????
 
Seriously, I am confused over the differences between models, what chips are used in models other than the two using TI5615/5630, etc.  If ever a feature/specification matrix table comparison was needed, it would be for these products.
 
Steve
 
 

SlushPuppy

Re: $175 Class D amp--120 wpc
« Reply #50 on: 17 Jan 2010, 04:37 am »
Some good enclosure choices here.

steve k

Re: $175 Class D amp--120 wpc
« Reply #51 on: 17 Jan 2010, 04:48 am »
Quote
It appears that all of the amps title descriptions are power output @ 4 Ohms.  But one model "Class D Power Amplifier, 250W X 2 - 8 Ohm" lists the output under Specifications as "Output: 250 X 2 - 8 Ohm, 250 X 2 - 8 Ohm"
 
What does that mean?  Can it not operate at 4 Ohm?
 
Under Features it says "Stereo or Bridged Configuration", but under Specifications it says "Bridged Output: Not Recommended"

I agree about the website--it needs work. I asked Tom about this particular amp recently because I was considering trying it on my bass panels which are a 4 ohm load. He said as it currently stands it needs more heatsink to operate in 4 ohms and he is working on that and that his prototype is working successfully. So hopefully he'll have a design out that will operate in 4 ohms soon.


As for the chips, I believe they all use an International Rectifier IRS 2092 chip but the 600 watt and 160 watt amps which use the TI TAS5630 chip. I'd suggest you email Tom at ClassD Audio. He is quite helpful.

He generally doesn't recommend bridging his amps into a 4 ohm load.
steve

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Re: $175 Class D amp--120 wpc
« Reply #52 on: 17 Jan 2010, 04:37 pm »
Dude! You're the man!

Best,
Anand.

Just happy to help.  I used it for my 600w kit.  Looking forward to it.

mr_bill

Re: $175 Class D amp--120 wpc
« Reply #53 on: 17 Jan 2010, 04:41 pm »
Some good enclosure choices here.

Excellent slushpuppy - thanks.

gitarretyp

Re: $175 Class D amp--120 wpc
« Reply #54 on: 17 Jan 2010, 05:34 pm »
Par-metal is a very good source for enclosures.

This place also lists some nice looking chassis, but I've never dealt with them and they don't list prices on the website.

jtwrace

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Re: $175 Class D amp--120 wpc
« Reply #55 on: 17 Jan 2010, 07:45 pm »
WOW!  I just went through all 19 pages here: http://www.diyaudio.com/forums/class-d/152980-class-d-audio-who-these-guys.html

I asked Tom if he would join this forum to help answer any questions.  He mentioned that he will try but if you have any questions to just email him and he'll answer them via email.  He did say that he's busy working 7 days per week (designs and running a small business) so his forum time get limited nowadays. 


Niteshade

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Re: $175 Class D amp--120 wpc
« Reply #56 on: 19 Jan 2010, 12:04 pm »
Antek has toroid covers, in case you want to mount it above the chassis. I saw them on Ebay.  :D

Nick77

Re: $175 Class D amp--120 wpc
« Reply #57 on: 19 Jan 2010, 12:36 pm »
http://cgi.ebay.com/DIY-Audio-Power-Amp-Toroidal-Transformer-Cover-CA-400_W0QQitemZ250562718618QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3a56b3ab9a

Do these covers provide any benifit if used inside a case?

I decided to give the 120 watt a try based upon your review Steve, should be here by the end of the week. Thanks again for the heads up!
« Last Edit: 19 Jan 2010, 03:13 pm by Nick77 »

jtwrace

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Re: $175 Class D amp--120 wpc
« Reply #58 on: 19 Jan 2010, 01:05 pm »
http://cgi.ebay.com/DIY-Audio-Power-Amp-Toroidal-Transformer-Cover-CA-400_W0QQitemZ250562718618QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3a56b3ab9a

Do these covers provide any beniifit if used inside a case?

I decided to give the 120 watt a try based upon your review Steve, should be here by the end of the week. Thanks again for the heads up!

I wouldn't think so.  I'm trying one as well (600w)...

santacore

Re: $175 Class D amp--120 wpc
« Reply #59 on: 23 Jan 2010, 01:15 am »
Great service from these guys. E-mail questions were responded to quickly and my order arrived the day after ordering. Now I just need to find an enclosure to fit. So far I'm very pleased with the purchase.