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Old 13th February 2011, 09:59 AM   #1
matsj is offline matsj  Sweden
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Default Aleph 30 input connections ?

I have 2 aleph 30 pcb laying on my board and i have lost my papers on them. Can someone help me with the input connections ?
I have a bad pictures if that can help.
From left: gnd, sg, in+, in-. In the in- there is a small wire to the right unmarked hole.
Is In+ to pin 2 on xlr ?
Is SG to pin 1 ?
Is gnd to pin 3 ?

mats
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Old 13th February 2011, 10:04 AM   #2
anilva is offline anilva  India
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Quote:
Originally Posted by matsj View Post
I have 2 aleph 30 pcb laying on my board and i have lost my papers on them. Can someone help me with the input connections ?
I have a bad pictures if that can help.
From left: gnd, sg, in+, in-. In the in- there is a small wire to the right unmarked hole.
Is In+ to pin 2 on xlr ?
Is SG to pin 1 ?
Is gnd to pin 3 ?

mats
Pin 2 on XLR is +in and 1 is Signal Ground (SG).

As far as I can see in the picture, the -In is taken to ground to make the amp a single ended amp instead of a balanced input. Will work fine.

Cheers.
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Old 13th February 2011, 10:33 AM   #3
matsj is offline matsj  Sweden
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Thank you for answer. How do i do for working on both balanced and single end input ?

mats
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Old 13th February 2011, 12:40 PM   #4
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Leave the shorting jumper off of the board and make a shorting jumper to plug into the XLR that connects pin 1 and 3 when you are using the RCA inputs. Pass Labs supplies these with the amps they sell.

pin 1 is SG, pin 2 is in+, pin 3 is in-

Last edited by Bill Fuss; 13th February 2011 at 12:49 PM.
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Old 14th February 2011, 10:02 AM   #5
matsj is offline matsj  Sweden
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Thank you very much. IŽll change the cables and use shorting jumpers in the xlr plugs.

mats
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