opto 7


dual opto 7

a beautiful dual optical compressor limiter design based on the 1968 LA2A comp/limiter design -

the new 2018 opto 7 pcb is a leap forward in vacuum tube audio design .


1:1 circuit of the 1968 LA2A schematic 

all connections are through shielded  sma cables - essentially no soldering wires in this design 

front panel pcb makes wiring the entire front panel audio / metering and limiting controls a snap.

designed for sowter or lundahl audio transformers ( will work with any applicable transformers rated for the circuit if mounted off board)

option to hard wire individual controls to the pcb or use sma cables for most connections  (metering is connected through a ribbon cable to the control pcb)

comes with tube regulated power supply and dc heaters for ultra quiet operation.

pre-order price : $320 usd includes shipping    (est shipping date : february 14 2018)

mega large 64 meg manual hi resolution link - 


opto seven legend.jpg
Updated Opto7 Schematic

Updated Opto7 Schematic