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Old 21st November 2011, 11:54 AM   #251
MrSlim is offline MrSlim  Canada
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Quote:
Originally Posted by alkasar View Post
everyone knows that black painted amps sound better than silver ones
Like red cars: they are faster
Well, it's a matter of opinion, Black amps tend to have a darker sound.. and Sliver amps tend to be brighter..
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Old 21st November 2011, 12:05 PM   #252
alkasar is offline alkasar  France
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Originally Posted by MrSlim View Post
Well, it's a matter of opinion, Black amps tend to have a darker sound.. and Sliver amps tend to be brighter..

so Pinkmouse knows what to do fo his multichannel amp
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Old 21st November 2011, 12:24 PM   #253
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Yup, black for bottom, a nice warm orangey-red for the mids, and a pearlescent white for that bright zingy top end.

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Old 26th November 2011, 05:14 PM   #254
lithoc is offline lithoc  Malaysia
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Hi LJM,

For L25D, is IRFB4020PBF can be replace by IRFB5620PBF ?

For the inductor, is there anything in between > 13A & < 31A ?
20A should nice without increase the price too much

IMHO, L25D should be more than 450W @ 4ohm.

Last edited by lithoc; 26th November 2011 at 05:22 PM.
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Old 26th November 2011, 07:07 PM   #255
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Quote:
Originally Posted by lithoc View Post
For L25D, is IRFB4020PBF can be replace by IRFB5620PBF
IRS2092 should be able to drive those with no problems. Of course, getting the OK from the designer is better than my opinion.
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Old 1st December 2011, 01:33 PM   #256
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by lithoc View Post
Hi LJM,

For L25D, is IRFB4020PBF can be replace by IRFB5620PBF ?

For the inductor, is there anything in between > 13A & < 31A ?
20A should nice without increase the price too much

IMHO, L25D should be more than 450W @ 4ohm.
Irfb4020 and IRFB5620 interchangeable.

Used for L25D. I suggest using IRFB4020.

The transistor usually power, the greater the current, his performance parameters are much lower.

Grid charge Qg influence is the loss of the key parameters MOSFET switch, lower Qg will lead to faster switch speed and a low grid of loss

IRFB5620 Have lower RDS. Can improve efficiency. Reduce the heat tube field effect.

But it may not be for a higher frequency.
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Old 3rd December 2011, 08:14 AM   #257
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LJM - I made a mistake in my power supply . It is +/- 52V. However, I have build up my L25D already. Can I use my existing power supply without changing the L25D? Thanks, Please let me know.
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Old 4th December 2011, 12:24 PM   #258
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Quote:
Originally Posted by ljm_ljm View Post
This is me a new design of the AMP. He had since the IR company demo version IRAUDAMP7S-200.

It USES the IRS2092 driver IC, and the IRFI4020H special mosfet output

Its power can do 200 W 8 R (+ 65 V). So I call it the L 20 D.

Hi Ljim.
I'm from Brazil.
Could you provide me with the layout of this amplifier?
I bought 02 of these plates by ebay and really enjoyed it.
Thank you.
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Old 4th December 2011, 03:08 PM   #259
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by alvinlim View Post
LJM - I made a mistake in my power supply . It is +/- 52V. However, I have build up my L25D already. Can I use my existing power supply without changing the L25D? Thanks, Please let me know.
I know you said power supply.
IT IS AC 52-0-52 , OR AC37-0-37 Rectifier = DC + - 52 V?

if it is AC52-0-52, RECTIFIER =+ - 72V.

so It can not work in L15D.

it is can use L25D only.
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Old 4th December 2011, 03:09 PM   #260
ljm_ljm is offline ljm_ljm  China
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DC + - 52. can use L15D 。
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