4 x LM3886 Monoblocks (each with tri/quad chips) - questions and help... - diyAudio
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Old 24th February 2014, 03:53 PM   #1
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Exclamation 4 x LM3886 Monoblocks (each with tri/quad chips) - questions and help...

Hi All,

I am considering building:
- 4 monoblocks (for bi-amp - more on that)
- each monoblock will consist of tri or quad LM3886 chips
- 2 monoblocks per transformer.
- 2 monoblocks per enclosure.

This is my first AMP build project and wanted some help..

- I wanted to buy pre-built kit, something featuring 3 or 4 chips in parallel per mono amp. Any suggestions?

- What transformers etc?

- Powersupply? I am clueless about what I need for 4 monoblocks

- I am currently using Audiolab 8000S + Audiolab 8000P to biamp Proac Studio 140MK2 8ohm speakers. Would the above give me sufficient power to replace Audiolab?
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Old 24th February 2014, 06:39 PM   #2
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I guess, going by these few threads, China kits are not worth it..
Bought a XY LM3886 Kit.
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Old 24th February 2014, 07:51 PM   #3
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i think i am leaning towards chipamp.com dual mono to kick start this project. Are there any other alternative kits? Ideally pre-assembled ones?
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Old 24th February 2014, 08:19 PM   #4
sreten is offline sreten  United Kingdom
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Hi,

IMO a very pointless exercise, you won't better the Audiolabs.

rgds, sreten.
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Old 24th February 2014, 08:21 PM   #5
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Originally Posted by sreten View Post
Hi,

IMO a very pointless exercise, you won't better the Audiolabs.

rgds, sreten.
Thank you for the quick reply. I have been reading about the magical 3886 but always wondered if it was going to be a worthwhile upgrade.
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Old 24th February 2014, 10:14 PM   #6
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Paralleled chipamps is rather too ambitious a project for a first-timer. Better to start smaller and gather experience. TDA8566 is a great starter chip and might possibly better your Audiolab in the right implementation albeit at considerably lower power output.
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Old 24th February 2014, 10:21 PM   #7
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thank you abraxalito.

I am in at the deep end and i have to admit that I am finding it all very confusing indeed. I guess the audio quality (and cost) is my biggest priority and was interested in seeing if Chipamps cant better my AudioLab pre-power combo. Having read through some more, I suspect a custom PCB + quality components may just work out to be more or equal than a second hand Audiolab 8000P. I wonder if anyone has compared these chipamps to some hi/mid end amps such as Roksan etc and can share their opinions regarding sound quality?

I will check out TDA8566, any kits you can recommend? What would be the best "audiophile" / high quality Chipamp kit to start with?
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Old 24th February 2014, 10:26 PM   #8
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Originally Posted by abraxalito View Post
TDA8566 is a great starter chip
Just read your other thread about 2ohm load. Would this chip be suitable for my Proac, they are 8ohm with minimum 15w requirement?
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Old 24th February 2014, 10:32 PM   #9
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I have a blog entry with a schematic for a TDA8566 amp here : http://www.diyaudio.com/forums/blogs...d-project.html

The chip can drive down to a 2ohm load, I've only tried it with 8ohms and it sounds awesome with the right power supply and layout. Having a good layout and a very low noise power supply are what makes for a high-end sound, in my experience. Those aspects are not explained in the textbooks I've read but make the greatest difference, IME. I can only recommend learning that yourself by building and playing around with tweaks - that's the fun of DIY
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Old 24th February 2014, 10:35 PM   #10
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Originally Posted by abraxalito View Post
I have a blog entry with a schematic for a TDA8566 amp here : http://www.diyaudio.com/forums/blogs...d-project.html

The chip can drive down to a 2ohm load, I've only tried it with 8ohms and it sounds awesome with the right power supply and layout. Having a good layout and a very low noise power supply are what makes for a high-end sound, in my experience. Those aspects are not explained in the textbooks I've read but make the greatest difference, IME. I can only recommend learning that yourself by building and playing around with tweaks - that's the fun of DIY
Thank you. Just reading through your link
Yes I am very much of a noob when it comes to DIY, so please bear with the noob questions.
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