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Old 24th September 2015, 05:13 PM   #1
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Default I AM D v200, Fx Audio d802, optimisation and TPA3116

Hi all,
There is agitation aroud these 2 PWM amps on French forums.
Please have a look on the attached pic.
These amps are digital oriented as all inputs are digital.
The technologies looks interesting : no need for DAC ; it uses PWM technology.
Performances look very good.
There are ways for upgrades (power input, SPDIF conversion, capacitors,....)
What do you think about it?
How do you think it can sound?



Click the image to open in full size.
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Old 25th September 2015, 02:49 AM   #2
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Join Date: Sep 2004
Location: Northland, New Zealand
Hi,
I have some I.AM.D amplifiers, V110 and V200.
I am using SPDIF input and MiniDSP 4x10 active crossover.

I have modified the V110 with better power supply capacitors, Tentlabls clock on the TAS5548, and removed output filter and other components (coils and capacitors, optoisolators, etc).
I can remove these components because I am using the amplifiers to drive individual speaker drivers (no passive crossovers).

Power supply is Connexelectronic SPMS into TI TPS7A4700 LDO regulators.

I like the V110 and V200 amplifiers. I would like to hear what modifications other people have made!

Cheers,
Mike
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Old 25th September 2015, 09:04 AM   #3
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Quote:
Originally Posted by mikey_audiogeek View Post
Hi,
I have some I.AM.D amplifiers, V110 and V200.
I am using SPDIF input and MiniDSP 4x10 active crossover.

I have modified the V110 with better power supply capacitors, Tentlabls clock on the TAS5548, and removed output filter and other components (coils and capacitors, optoisolators, etc).
I can remove these components because I am using the amplifiers to drive individual speaker drivers (no passive crossovers).

Power supply is Connexelectronic SPMS into TI TPS7A4700 LDO regulators.

I like the V110 and V200 amplifiers. I would like to hear what modifications other people have made!

Cheers,
Mike
Very interesting, I am very curious of how it sounds with better components (coilcrafts inductors, ...)
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Old 7th October 2015, 01:06 PM   #4
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Hi there are (surprisingly) not many reactions. This while DDX seems the future. Are there any drawbacks on the I.AM.D V200 Camelator ?
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Old 9th October 2015, 03:23 AM   #5
Previously known as: MyNaim
 
Join Date: Sep 2009
Quote:
Originally Posted by mikey_audiogeek View Post
Hi,
I have some I.AM.D amplifiers, V110 and V200.
I am using SPDIF input and MiniDSP 4x10 active crossover.

I have modified the V110 with better power supply capacitors, Tentlabls clock on the TAS5548, and removed output filter and other components (coils and capacitors, optoisolators, etc).
I can remove these components because I am using the amplifiers to drive individual speaker drivers (no passive crossovers).

Power supply is Connexelectronic SPMS into TI TPS7A4700 LDO regulators.

I like the V110 and V200 amplifiers. I would like to hear what modifications other people have made!

Cheers,
Mike
Hi,

2 mods :

- add two 10uF over C3 and C13 on V200, please check on TAS5548 datasheet it seems to be strongly advised.
You can see the 2 small caps on the picture on the right.

Quote:
DVDD1 35 P 3.3-V digital power supply. (It is recommended that decoupling capacitors of 0.1 μF and 10 μF be mounted close to this pin).
DVDD2 14 P 3.3-V digital power supply for PWM. (It is recommended that decoupling capacitors of 0.1 μF and 10 μF be mounted close to this pin).
Have done that one and it makes clearly a difference.
- change spdif output as sc8416 seems to be obsolete with ak4113. Taped of I2S output. Can give more details if needed.
It seems to bring a massive difference. Not done yet as the new receiver card is still to come.

credit to the french forumer globulgl

I.AM.D V200 : Amplis - Page 93

happy to help if needed
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Old 11th October 2015, 09:14 AM   #6
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Join Date: Sep 2004
Location: Northland, New Zealand
Thanks! I understand C3 and C13.

French forum seems to be offline. Please can you explain "change SPDIF output"?

Also I2S mod.

Cheers,
Mike
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Old 11th October 2015, 10:33 AM   #7
Previously known as: MyNaim
 
Join Date: Sep 2009
Sorry it's a SPDIF input as you'd probably guessed.

Actually there is an I2S input that you can use in using the aux input

Click the image to open in full size.

So you can either use the I2S input with an I2S device or create a new and improved SPDIF input with a card like this

http://www.aliexpress.com/item/AK411...74_75,201560_4


Cheers

Oli

Last edited by 2600Hz; 11th October 2015 at 10:48 AM.
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Old 11th October 2015, 11:44 AM   #8
Previously known as: MyNaim
 
Join Date: Sep 2009
Hi Mike,

Is it worth upgrading the clock of the TAS ?

Cheers
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Old 11th October 2015, 11:53 AM   #9
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Location: Northland, New Zealand
Thanks!

I am using Minidsp 2x8 so will try the I2S input.

I have located the I2S input on the TAS5548 but will try the AUX I2S input first.

Cheers,
Mike
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Old 11th October 2015, 08:09 PM   #10
Previously known as: MyNaim
 
Join Date: Sep 2009
Hi Mike,

Would you recommend the clock upgrade on tas5548 ?

Cheers
Oli
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