Manley EQP-1A Enhanced "Pultec" Mono Equalizer
Manley Enhanced Pultec EQP-1Ais Manley's interpretation of the historic Pultec Equalizer as originally produced by Pulse Techniques, Inc. Manley has been building Pultec EQs since 1990 after they hunted down Eugene Shenk in New Jersey to ask for his permission and blessings to produce their own version of his classic piece. This Manley Pultec EQ employs a simple and clean all-tube make-up gain block to reamplify the signal after the passive EQ circuit.
Manley Enhanced Pultec Equalizers use a transformerless signal path and has a vastly superior B+ power supply, with regulated and balanced heater supply. The Manley line amp is known to be killer-sounding. The components Manley uses today on the EQP-1A equalizer just weren't available in the 1960's. 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.
The Manley Pultec EQP-1A uses 1 x 12AU7WA and 1 x 6414 in it's all-tube single-ended line amplifier for the gain make-up and extra-beefy sound; gain is factory set for unity but additional gain is available by a rear mounted feedback adjustment trimpot. Like Manley 40dB Mic Preamps, the Manley Pultecs offer both transformer coupled balanced and direct capacitor coupled unbalanced outputs for easy interface and sonic variety.
The rackmount Pultec EQ may be set to 'flat' positions or BYPASSED entirely. All BOOST and CUT controls are continuously variable conductive plastic potentiometers for absolutely silent operation and long life. Manley's single rack unit mono blocks occupy one-third of the space of the 'antique Pultecs', an important consideration for allocation of outboard rack space. Manley added a couple extra frequencies too. 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 in that switch's middle position.
MANLEY input transformer with nickel laminations potted in mu-metal case. 3K Ohm input Z
PHASE REVERSE switch for balanced XLR input
Alternate transformerless 1/4" HI-Z (5K Ohm) input
BYPASS switch & AUTO-MUTE w/warmup delay
Silent conductive plastic BOOST & CUT controls
Sealed gold-contact Greyhill frequency select switches
Vacuum Tubes: 1 x 12AX7WA (gain) and 1 x 6414 (or 5965) White Follower
Hi-current drive <50 Ohm LO-Z XLR & 1/4" outputs
Balanced Transformer-Coupled XLR Outputs via MANLEY 9611
Flat frequency response from 10Hz-70KHz
<0.01% THD @ 1kHz
S/N Ratio: 116 dB
Adjustable FEEDBACK / GAIN: Unity ±5 dB
Max. output: +30 dBv
Power consumption: 18 watts
Operating mains voltage: Units are purpose built for original destination country's mains voltage: 100V, 120V, or 220-240VAC as indicated on the serial number badge. Power transformer must be replaced in order to change mains operating voltage. 120VAC units may NOT be rewired to put the primaries of the power transformer in series for 220-240V operation or a large radiated field of hum will develop. If changing locations/voltages, the power transformer must be replaced with the dedicated one for the voltage at which it will operate.
Mains Voltage Frequency: 50~ 60Hz
Dimensions: 19" x 1 3/4" x 10" (occupies 1u)
Shipping weight: 12 lbs.
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