MANLEY LABORATORIES is the only authorized user of the original Western Electric passive EQ circuitry previously licensed to Pulse Techniques Inc. found in the well-known (and still sought after in the used market) antique Pultecs. EQ may be set to "flat" positions or BYPASSED entirely.
The original Pultec EQ's had three transformers in the signal path whereas Manley's can be used completely transformerless. The Manley Enhanced Pultec has a vastly superior B+ power supply, with regulated and balanced heater supply. The line amp is known to be killer-sounding. The components we use today just weren't available 20 years ago. So, if you want a project with crackling carbon pots, dirty open frame wafer switches, 5% and 10% tolerance noisy carbon resistors, exposed tubes sticking out the back of the 3U chassis, etc., go pay top dollar for an antique Pultec!"
All BOOST and CUT controls are continuously variable conductive plastic potentiometers for absolutely silent operation and long life. The single rack unit monoblocks occupy one- third of the space of the "antique Pultecs", an important consideration for allocation of outboard rack space. The rear mounted input switch selects 0 degrees or 180 degrees PHASE INVERT for the balanced gold pin XLR input or the transformerless unbalanced bridging input (1/4" jack) may be selected.
Kick drum? Bring on the Pultecs! You'll soon discover the power and magic of having those individual Low Frequency BOOST and CUT controls in that LF shelf circuit... Need a little clarity or extension? Try that middle bell-shaped Boost dialing in the sharpness of the boost on the BANDWIDTH control. When you ease off the HF shelf control. You'll see. There's no substitute for a Pultec.
The Langevin unit works the same way as the Manley unit but instead has an ALL- DISCRETE make-up gain amplifier with both balanced and unbalanced inputs and outputs-- all completely transformerless. It is known to have an incredibly sweet top end.