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Chip Amps Amplifiers based on integrated circuits

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Old 20th December 2008, 03:12 PM   #1
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Default Recommedations for cheap DIY speaker amps?

T-path amps:

-http://www.autocostruire.com/catalog/product_info.php?cPath=42&products_id=257
-http://diyparadise.com/shop/index.php?main_page=product_info&products_id=67

Chipamps:

-http://www.audiosector.com/lm3875.shtml
-http://www.audiosector.com/lm4780.shtml
-http://www.chipamp.com/lm3886.shtml
-http://www.chipamp.com/lm1875.shtml

What PSU designs should I be looking at?

Brendan
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Old 21st December 2008, 11:48 AM   #2
AndrewT is offline AndrewT  Scotland
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Default Re: Recommedations for cheap DIY speaker amps?

Quote:
Originally posted by cyberspyder
What PSU designs should I be looking at?
Start by reading ESP, then Nuuk (DD) and finally the TNT site.
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Old 21st December 2008, 07:13 PM   #3
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Your amplifier list includes very different types of amplifiers. First step is to decide, what you want.

The LM4780 is a stereo IC, while all others are mono.
The T-class amplifiers and the LM1875 can deliver up to 20 W, the others up to 60 W.

What are you after? Best sound? Smallest package? Lowest power consumption? Stereo amplifier? Active speakers?
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Old 21st December 2008, 07:48 PM   #4
mikje is offline mikje  United States
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$50 for amp and transformer. Add a $3 Radio Shack volume pot and you're good to go for $53 plus shipping

I built one of these and am very happy with it!

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=320-212

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=320-212
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Old 22nd December 2008, 12:51 AM   #5
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Quote:
Originally posted by pacificblue
Your amplifier list includes very different types of amplifiers. First step is to decide, what you want.

The LM4780 is a stereo IC, while all others are mono.
The T-class amplifiers and the LM1875 can deliver up to 20 W, the others up to 60 W.

What are you after? Best sound? Smallest package? Lowest power consumption? Stereo amplifier? Active speakers?
The best sound really, space isn't a big concern, but I don't want a huge amp either. Power consumption shouldn't be too much, but anything that takes up relatively little to moderate power is OK. And yes, has to be stereo as I have two speakers, but honestly, what's the advantage of putting two mono stages together vs. a stereo amp? Lastly, active speakers as in speakers without an active amp? If so, no, as I have a passive crossover.

Thanks, Brendan
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Old 22nd December 2008, 01:18 AM   #6
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Is it a bad idea to have a 'do everything' amp? I want to be able to do the following in the same enclosure:

1) Speaker amp
2) Headphone amp
3) A 'bypass' feature

I know I can have a switch that'd allow me to switch inputs to either amp, but how would I do it with one pot? Also, how'd do that bypass feature? I plan to have a DAC that'll input into this amp, but I'd also like to have the capability to 'pass-through- the analog signal to another amp without resorting to unplugging cables.

Brendan
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Old 22nd December 2008, 01:37 PM   #7
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Default Mikje, abou the $50 amp/transformer

Your links don't work...could you post more info on your amp project???
Thanks, interested!!
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Old 22nd December 2008, 01:37 PM   #8
ken2400 is offline ken2400  United States
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There are some new 2 channel car/bike amps on Ebay for under $30. Shipping from China so it would take some extra time BUT my be worth looking at.
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Old 22nd December 2008, 02:03 PM   #9
Puffin is offline Puffin  United Kingdom
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Quote:
Originally posted by ken2400
There are some new 2 channel car/bike amps on Ebay for under $30. Shipping from China so it would take some extra time BUT my be worth looking at.
Someone on here (I think) bought one. Mmmmmm
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Old 22nd December 2008, 03:55 PM   #10
mikje is offline mikje  United States
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Default Re: Mikje, abou the $50 amp/transformer

Quote:
Originally posted by larezreyes
Your links don't work...could you post more info on your amp project???
Thanks, interested!!
OK, Let's try again.

http://www.parts-express.com/pe/show...number=320-212

http://www.parts-express.com/pe/show...number=120-210


I also used a Velleman K8084 vloume/treble/bass control.

http://store.tequipment.net/index.as...on=CARTDETAILS

Any ???s, just ask.
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