Altec 1567 Mod: This Mod came about at the request of some customers who noted the fantastic sonic characteristics of the Altec 1567 Mixer due to good sounding tubed mic pres, but found some significant drawbacks that prevented the practical use of the unit in music production. The Drawbacks :The EQ, when not needed, still added noticable hiss to the output.
This unit has a mono output, and it’s unusual to be summing 4 mics in modern music production. Most Altec 1567 owners are only using the unit for amplification of one, or at most two mics. Yet s..
Altec 1591A Mod:This Mod came about at the request of some customers who favored the fantastic sonic characteristics of the Altec 1591 Compressor, but found the excessive gain of the input stage to be a significant drawback in that it severely over-compressed normal level signals.The Drawbacks : To avoid over-compression the input level controls are set so low that fine control of level becomes difficult. With the input levels set so low the output signal is just too noisy.
The release times are too longThe Solution :A switch is added on the rear of the f..