Summing both outputs with resistors

Hardware questions and issues with the FV-1

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Aion
Posts: 33
Joined: Sat Mar 22, 2008 1:17 am

Summing both outputs with resistors

Post by Aion »

Dear Frank,

Some FV-1 users sum the both analog output voltages with two 1k resistors. Just one lead of the 1st resistor to the L output, one lead of the 2nd resistor to the R output. The both resistors ends are soldered together and go through a DC blocking capacitor to the input of an non-inverting operational amplifier.

Is such solution correct? I see in the table on page 3 of the FV-1 datasheet, that the minimum "Allowable load resistance" is 10 kohm.

Let's assume, that the FV-1 is running its internal Reverb1 or Reverb2 program.

Thank you in advance.
dientutrongtoi
Posts: 8
Joined: Fri Sep 28, 2018 10:14 pm

Re: Summing both outputs with resistors

Post by dientutrongtoi »

that is mono output. not stereo
frank
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Joined: Wed Oct 19, 2005 12:26 pm
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Re: Summing both outputs with resistors

Post by frank »

I don't generally recommend summing the outputs but it sounds like a basic summing amp configuration and is probably OK.
Frank Thomson
Experimental Noize
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