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student 12th December 2006 01:27 PM

gainclone vs. symasym amp

what would you think about a comparison between the gainclone and the so-called "symasym" amp ?
which one would sound better and which one would cost less in production ?
here's a link to the symasym amp. i saw it first in the new "kang+ton" magazine. the also said that it would cost around 100 each monoblock and it would do a great sound @ 60-100 watts (8/4 ohms).

someone knows this amp ?

i also have a question @ the gainclone amp:
this is a website of a german guy who built a "free air connected" version of the gainclone. (i dont know the correct word for this but look at the photos and u'll understand what i mean)
does someone in this forum ever made such a creation ? does it sound good ?

and maybe can someone post a part-list of the whole parts u need for the gainclone ? (maybe inkl. snubber and power supply)

thx everyone :D and sorry for my crap english ;)

pinkmouse 12th December 2006 02:21 PM

I will keep building GCs because they are cheap and sound very good. However, my Symasym is better. ;)

Dxvideo 12th December 2006 02:34 PM

For the gainclone topic;

The German guy says,

- "The separate star grounds. The signal ground is on the minus pole of the RCA connector (lower arrow). The second legs of the Cs caps are connected using a thick copper wire. In the middle of this wire, the power star ground is placed (upper arrow). Here the two ground wires from the PSU (the separate + and - grounds) and the speaker return arrive.
The two star grounds are connected by a thin and relatively long copper wire in order to lift the signal ground by a small amount.
This grounding scheme is done independently for both channels. ."

I cannot understand that. There are two gainclone independent. From the PSU there independent GNDs come to each GC board. Then they go another point seperated. Same time signal ground goes an another point seperated. Then they get connected via a thin and long cable. This procedure runs for every channels independent. And finally they comes together in enclosures chasis with mains earth....

Ouch.. They're too complex for me! If i make like that;

One ground comes from the power supply board to power star point,
One power ground (not connected to signal gnd on PCB) comes from each GC board to power star point,
One signal gnd comes from the source to signal star point,
One signal gnd comes from each GC board to signal star point.

Then signal star point connects to power star point via a 10ohm resistor, after all via two (reversed to eachother and in parallel) diode and a 100nF cap (in parallel) the power ground star point connects to mains earth (this earth point is directly connected to enclosures chasis...)

What happens?

student 12th December 2006 04:19 PM

@ pinkmouse you built a symasym ? nice
do you have pictures and maybe a part list ?

@ dxvideo sorry i dont know so much about electronic. and that's exactly the reason why i posted my question in this forum ;)

AKN 12th December 2006 04:31 PM


CarlosT 12th December 2006 07:49 PM

Isn't there a more elegant way of doing a P2P GC? I mean that one dogbreath did is cool but...butch? Is that the right word? :D

student 12th December 2006 08:07 PM

thx !!

PMA 12th December 2006 08:38 PM

Symasym is quite another league than that Gainclone child toy.

pinkmouse 12th December 2006 09:56 PM


Originally posted by student
@ pinkmouse you built a symasym ? nice
do you have pictures and maybe a part list ?

How about a nice big thread to keep you busy! ;)

student 13th December 2006 01:32 PM

perfect ;)

i think ill first start with the gainclone, cause i never built an amplifier before and then ill try my luck on a syasym. nice summer project :)

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