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Old 2nd August 2004, 12:08 PM   #1
krishu is offline krishu  Europe
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Default FS: Chip Power Amps (Gainclones) or parts

Hi,

now I have my Steinmusic power amps running; therefore I want to sell my ub-audio based power amps.

each of these two monoblocks consists of:

on pcb stuffed with
1 TDA7293
Mundorf KPSN Tinfoil input cap (can be shortened)
non-magnetic vishay cmf 143-55 resistors
Panasonic FC, Elna Silmic, Wima MKS capacitors

each power supply is made out of
450 VA 2x25V torodial transformer
4x 10.000uF 50V Panasonic TS-HA caps
2x 3.3uF MKP cps
inrush current delay
dc filter (agains x-former hum)

There is a mute switch - no plops!

These amps sound gorgeous, very clear and transparent. If you have very low impedance speakers (<4 Ohms) they may be not the first choice but even then it is good value for the money.

The housing is 18mm MDF (unfinished), the front is 8mm acrylic, glowing red or blue, depending on power or mute.

Both poweramps are about 120 Euros materal cost each, so I ask for 250 Euros incl. shipping within EU, outside some more.

Pictures available.

Cheers
Christian.
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Old 3rd August 2004, 03:22 PM   #2
krishu is offline krishu  Europe
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Hi,

in parts the prices are:

signal pcb (equipped, 100% working): 50 each

torodial 230V -> 2x25V 450VA: 30 each

soft-start: 10 each

p/s pcb (HFA rectifiers, >40.000uF): each 30

dc filter: 5 each

housings: 20 each

heat sink: 10 each

switches, conectors, wiring: pennies....

Cheers
Christian.
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Old 5th August 2004, 02:17 PM   #3
krishu is offline krishu  Europe
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Picture of the signal pcbs (both channels)

Click the image to open in full size.

Cheers
Christian.
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Old 5th August 2004, 11:52 PM   #4
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Looks good.
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Old 6th August 2004, 11:48 AM   #5
krishu is offline krishu  Europe
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And sounds good, too
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