Friday 20 November 2020

Boss FA-1 FET Amplifier

 Slightly modified, subbing the two single op amps of the original to a dual. 1458 or 4558 should match the spec of the original ones.



3 comments:

  1. Verified with 2SK30 & 4558. Love the sound, keeper for sure!

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    1. What low current alternative to the 4558 works best in this circuit? I wanna use it inside a guitar, with 18V supply from two batteries.

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