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Old 25th May 2016, 10:09 AM   #1
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Default Recommendations for assembled chip amp + dac + preamp to build integrated amp from.

Hi!

I want to build a integrated amplifier, with DAC and a Raspberry Pi, using assembled boards from ebay and aliexpress.

Can you give me some recommendations for high quality boards found at ebay and AliExpress?

Im looking for something that can deliver 70W @ 8Ohm and the DAC should be able to handle dsd.

My plan is to connect the Pi with the DAC using USB. Is that a good thing or should I use I2S?
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Old 26th May 2016, 05:50 PM   #2
AndrewT is online now AndrewT  Scotland
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You can't get 70W into 8ohms from the common chipamps.
Unless you take the supply rails up very close to the absolute maximum supply rail voltage.

50W to 60W into 8ohms is the more usual limit if you make an allowance for mains voltage and load variations on your PSU output voltage.

Ebay and Aliexpress are riddled with fakes. I doubt anyone can guarantee good quality from either, since it depends so much on the current offerings and where they sourced them.
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Old 26th May 2016, 05:57 PM   #3
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Ok, thanks.

I guess I can lower the power demand down to 60W @ 8Ohm.

Can you recommend other sites to buy from rather than eBay and Ali?
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Old 28th May 2016, 03:44 PM   #4
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I really like my lm3886 chipamp from chipamp.com. $78 for the kit. But you want assembled. The kit was pretty easy to put together though. Do you know how to solder? There aren't too many components.

http://chipamp.com/product/non-inver...amplifier-kit/

As far as preamp, how about going with a greyhill switch and alps 10k pot -- but I've seen 100k pots inside these amps.. WHich is better for internal pot for LM3886 guys? 10k or 100k? I have a 10K ALPS for external pre for my lm3886.

http://www.ebay.com/itm/Original-ALP...-/121142301731
http://chipamp.com/product/alps-pote...olume-control/
http://www.ebay.com/itm/Greyhill-4-p...-/182127360333 (I have the 4 position greyhill though -- this one is 3.. but it's only $10 good deal.. I paid $20)

DAC.. I don't know how good the new Fiio's are but they are enclosed -- self contained.. can mount them inside flush with the back panel (after you make an opening). THey are like $22.

http://www.amazon.com/D03K-Digital-A.../dp/B009346RSS

I'm using the older Fiio (2011) which looks like the same casing except the newer one has gold plated rca's. I like the sound of it.. sounded better than the other sub $100 dac's I bought and returned at the time. I want to try some other DAC's in the near future to see if I can get even better sound.

Last edited by Jennifer G; 28th May 2016 at 03:58 PM.
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Old 29th May 2016, 08:14 AM   #5
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Thanks Jennifer! I can solder so I might go for an unassembled kit instead.

A passive preamp can work, it's by far the easiest and I can always replace it if I don't like it.
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Old 29th May 2016, 01:28 PM   #6
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Originally Posted by fire1 View Post
Thanks Jennifer! I can solder so I might go for an unassembled kit instead.

A passive preamp can work, it's by far the easiest and I can always replace it if I don't like it.
I'm looking into another DAC.. let me know when you find the best one for the money I see a couple kits on ebay that seem to be popular for less than $30.
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Old 29th May 2016, 01:55 PM   #7
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In the bargain basement category I reckon you'll have a hard time trying to beat this one - TDA1387 X8 NOS DAC
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Old 29th May 2016, 09:03 PM   #8
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Originally Posted by Jennifer G View Post
I'm looking into another DAC.. let me know when you find the best one for the money I see a couple kits on ebay that seem to be popular for less than $30.
I might go for the Hifiberry DAC+ Pro. A good match for a raspberry pi and also good price. If not then probably something with an AK4490/95 dac.
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Old 29th May 2016, 09:07 PM   #9
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Originally Posted by abraxalito View Post
In the bargain basement category I reckon you'll have a hard time trying to beat this one - TDA1387 X8 NOS DAC
Cool!
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