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Balanced(bridged) Zen Ver.4
Balanced(bridged) Zen Ver.4
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Old 10th December 2002, 10:02 AM   #1
Default Balanced(bridged) Zen Ver.4

Hi there,

I intend to build a balanced(bridged) version of Zen Ver.4, but am not sure how to set the input impedance up:
- can I remove R2, R3 and C12 and replace them with a single resistor to ground (e.g. 47k)
- or can I use an arrangement similar to the one employed with the Aleph amps

All this considering that two Zens will be working in parallel, sharing a common ground.

Thanks in advance.

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Old 10th December 2002, 11:15 AM   #2
kristijan-k is offline kristijan-k  Croatia
diyAudio Member
Join Date: Mar 2002
Location: CROATIA
Hello Stan,

You can use the schematic shown at:

I tested the circuit, and it is working fine.

In balanced operation, connect the speaker
between C - D therminals.
The output capacitors leave in the circuit, because
of the proper feedback.

Best regards,
Kristijan Kljucaric
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Old 10th December 2002, 11:26 AM   #3
Thank you for the prompt reply Kristijan, I'll follow the advice.

BTW, when do you think the PCBs for this particular Zen implementation will be available - it will be much easier for people like me to build it on quality PCBs.

Kind Regards

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