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Manley Labs Enhanced Stereo Pultec EQP1-A Equalizer

BH #MASPEQ • MFR #SPEQ
Manley Labs Enhanced Stereo Pultec EQP1-A Equalizer
Key Features
  • Manley Input and Output Transformers
  • All-Tube Line Amplifier
  • Silent Conductive Plastic Controls
  • Greyhill Frequency Select Switches
The Enhanced Stereo Pultec EQP1-A Equalizer from Manley Labs is a modern version of the two-channel, two-band classic Pulse Technique EQ featuring low and high frequency control, each with simultaneous boost and cut capabilities. Professional-grade components are used throughout and include conductive plastic potentiometers, sealed gold-contact switches, polystyrene capacitors, rolled film capacitors, foil capacitors, custom-wound transformers and a B+ power supply with regulated and balanced heater supply. The all-tube make-up gain block is used to amplify the passive inductor-based circuit providing high output and low distortion.
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Manley Labs SPEQ Overview

The Enhanced Stereo Pultec EQP1-A Equalizer from Manley Labs is a modern version of the two-channel, two-band classic Pulse Technique EQ featuring low and high frequency control, each with simultaneous boost and cut capabilities. Professional-grade components are used throughout and include conductive plastic potentiometers, sealed gold-contact switches, polystyrene capacitors, rolled film capacitors, foil capacitors, custom-wound transformers and a B+ power supply with regulated and balanced heater supply. The all-tube make-up gain block is used to amplify the passive inductor-based circuit providing high output and low distortion.

Each channel of the Enhanced Pultec is divided up into three sections. Low frequency offers a shelf-style filter with frequency selection, boost and cut, while the high frequency boost is a peak filter featuring a variable bandwidth control, frequency selection and boost control. The high frequency cut offers a shelf filter with frequency selection and cut control. Utilizing both cut and boost controls simultaneously results in unique shapes for custom tailoring your sound.

Features not found in the original design include an expanded frequency selection, transformerless inputs and outputs, and a gain set preset for adjusting the feedback over the line amplifier. The 3-way toggle switch on the rear of the unit provides phase reversal. The up position retains 0°, while the down position switches the balanced transformer wiring 180° out of phase. The center position switches off the transformer, optimizing the unbalanced 1/4" input to an impedance of 5000Ω. Handmade in the USA, the unit is housed in a 2U steel chassis with a CNC-machined 1/4" faceplate that is also inlaid with laser-engraved inserts. The Enhanced Pultec ships with an IEC power cable.

EQ Frequency per Channel
  • Low Frequency Boost/Cut: 20,30,60,90,120 Hz
  • High Frequency Boost: 1, 1.5, 2, 3, 5, 8, 10, 12, 14, 16 kHz
  • High Frequency Cut: 4, 8, 12, 15, 20 kHz
Additional Features
  • Manley input and output transformers
  • Phase reverse for balanced XLR input
  • 1/4" transformerless input
  • Bypass Switch
  • Auto-mute with warm-up delay
  • Silent conductive plastic boost and cut controls
  • Sealed gold-contact Greyhill frequency select switches
  • Vacuum Tubes: 2 x 12AX7WA (gain) and 2 x 6414 (or 5965) White Follower
UPC: 890833000205

Manley Labs SPEQ Specs

Number of Channels
2
Input & Output
Input
2 x XLR balanced transformer-coupled (fully floating / 5000 Ω)
2 x 1/4" unbalanced (5000 Ω)
Output
2 x XLR balanced transformer-coupled (600 Ω or higher / 2000 Ω or higher preferred)
2 x 1/4" unbalanced (<50 Ω)
Max Input
Maximum Input (Bypass through Line Amplifier): +30 dBv
Max Output
Maximum Output: +30 dBv
Headroom
Headroom (Referenced to +4 dBv): 26 dB
Frequency Response
10 Hz to 70 kHz ±0.5 dB
THD & Noise
THD & Noise (1 kHz @ +4 dBm): 0.015%
Noise Floor
Noise Floor (Gain Set to Minimum): -80 dB wideband
Signal to Noise Ratio
116 dB typical (A weighted)
Maximum Gain
Maximum Gain (via Trim on Back): 5 to -5 dB
Equalizer
Maximum EQ Boost: 16 dB lows, 11 to 20 dB highs
Maximum EQ Cut: 20 dB lows, 11 to 21 dB highs
Tube Type
2 x 12AX7WA
2 x 6414 (or 5965) White Follower
Rackmountable
2 U
Power Supply
0.35 A @115 VAC
Fuse: 1 A Slo-Blo
Power Consumption: 18 W
Dimensions
19.0 x 3.5 x 10.0" / 48.3 x 8.9 x 25.4 cm
Weight
18.0 lb / 8.2 kg
Packaging Info
Package Weight
14.62 lb
Box Dimensions (LxWxH)
22.2 x 15.2 x 8.1"

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