• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Sonic Frontiers Line 3 shematic needed

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Hi folks,

Meanwhile I have given up hope to find it, but maybe somehow somewhere out there on this planet has it and can help.

I am in need of the Sonic Frontiers Line 3 shematic or service manual. I have been looking around since years and noone seems to have it.

Stefan
 
Wow, that's a lot of circuitry for a line stage.

Yes, I agree with you, and it has digital volume control as far as I know and whole a lot control circuit.

My friend who share this circuit with me has 2 units of Line 3.

He has built a clone unit and has the audio circuit hardwiring, and has the shunt regulator PCB made. The volume control using Stepped attenuator ladder type.

It sounds way better than the stock, period.
 
Hope this help!

Thank you for the schematics. Is this preamp model the successor from those of the attached files?
And a second question:
From there I can order the schematics from the SFD-2 (both from MK-I and MK-II) ?
Thank you for your advices.
 

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