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Class D Switching Power Amplifiers and Power D/A conversion

I AM D v200, Fx Audio d802, optimisation and TPA3116
I AM D v200, Fx Audio d802, optimisation and TPA3116
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Old 21st October 2015, 01:24 PM   #21
2600Hz is offline 2600Hz
Previously known as: MyNaim
 
Join Date: Sep 2009
Quote:
Originally Posted by mikey_audiogeek View Post
Yup running the C3/C13 cap mod. 10uF OSCONs.

Also now running a Twisted Pear Trident regulator on the AVCC supply to the TAS5548. Nice mod.

I believe there's an I2S input on P23, can't confirm yet. I haven't tested I2S input at all yet, been working on the car instead...

Long weekend coming up so I hope to post some progress!

Cheers,
Mike
Hi,

So a good regulator on AVDD supply would be the next mod for me. Can't find any AVCC, could you please confirm that AVCC was a typo ?
Thanks for sharing

Also, consider replacing the nasty 7812 with a new regulated 12V line. V200 is definitely more balanced. Very nice mod.


Cheers
Olly

NB : a car in working order could be useful too

Last edited by 2600Hz; 21st October 2015 at 01:27 PM.
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Old 21st October 2015, 04:05 PM   #22
2600Hz is offline 2600Hz
Previously known as: MyNaim
 
Join Date: Sep 2009
Mike,

Could you please also post a picture of the new upgraded clock in place and maybe some details on how to managed to do replace the existing one.

Cheers

Olly
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Old 21st October 2015, 10:44 PM   #23
mikey_audiogeek is offline mikey_audiogeek  New Zealand
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Join Date: Sep 2004
Location: Northland, New Zealand
Yup typo. AVDD. From memory you need to cut the trace to C15 (on the top of the board) and connect the regulator across C15. There's 5V supply available on P23, convenient.

Thanks for the suggestion on the 7812, I'll try a TPS7A4700 here.

I'll take some photos on the weekend, when the rugby isn't on...

Cheers, Mike
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Old 21st October 2015, 10:45 PM   #24
mikey_audiogeek is offline mikey_audiogeek  New Zealand
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Join Date: Sep 2004
Location: Northland, New Zealand
Using this clock and connection instructions: http://tentlabs.com/Components/XO/as...23mounting.pdf
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Old 23rd October 2015, 06:32 AM   #25
2600Hz is offline 2600Hz
Previously known as: MyNaim
 
Join Date: Sep 2009
Thanks for your reply, will try and report

Cheers
Olly
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Old 23rd October 2015, 03:42 PM   #26
doinstuff is offline doinstuff
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Join Date: Jan 2011
Hey guys,

I found out about the v200 a little while ago and just stumbled across your mod thread.

How difficult are the upgrades you all are doing? II've done two minor soldering repairs in my entire life, so I'm not sure if I should attempt it or not.

I guess I need to order the amp first, before I start thinking about the upgrades
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Old 23rd October 2015, 04:39 PM   #27
2600Hz is offline 2600Hz
Previously known as: MyNaim
 
Join Date: Sep 2009
could be a good starting point
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Old 24th October 2015, 12:11 AM   #28
mikey_audiogeek is offline mikey_audiogeek  New Zealand
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Join Date: Sep 2004
Location: Northland, New Zealand
SMD Soldering Practice Kit

I would recommend practicing on a cheap SMD circuit board first. I've been soldering for 15 years and SMD boards still freak me out...
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Old 24th October 2015, 12:14 AM   #29
mikey_audiogeek is offline mikey_audiogeek  New Zealand
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Location: Northland, New Zealand
One you can buy here: PROJECT
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Old 24th October 2015, 02:53 AM   #30
mikey_audiogeek is offline mikey_audiogeek  New Zealand
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Join Date: Sep 2004
Location: Northland, New Zealand
OK, got I2S working on the AUX input, as per the photo in post #7 of this thread. Nice improvement.

Feeding it from a MiniDSP 2x8 unit https://www.minidsp.com/products/min...2-x-in-8-x-out
and tapping into the I2S lines.

A bit bulky and awkward so next step is to buy a MiniDSP MiniSHARC https://www.minidsp.com/products/min.../minisharc-kit
which will feed I2S streams to my triple-stack of V200 amplifiers! (active crossover to 3-way speakers)

Photos to follow...

Cheers,
Mike
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