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WesAudio LC-EQP Pultec-Style Passive Equalizer

BH #WELCEQP • MFR #LC-EQP
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WesAudio LC-EQP Pultec-Style Passive Equalizer
Key Features
  • Single-Channel, Pultec-Style EQ
  • Clean and Clear Passive EQ
  • Tube Amplification Circuit
  • Carnhill Input and Output Transformers
For producers, recording engineers, and mixers in pursuit of a high-class, analog, Pultec-style EQ, the WesAudio LC-EQP single-channel equalizer presents a solution worthy of go-to racks around the world. Its design was finalized after a year of study and coordinating with Polish studios; the result is a passive EQ based on coils, resistors, and capacitors combined with a dual-tube amplification circuit. With the addition of Carnill input and output transformers, the LC-EQP is poised to deliver clarity as well as musical tube character.
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WesAudio LC-EQP Overview

For producers, recording engineers, and mixers in pursuit of a high-class, analog, Pultec-style EQ, the WesAudio LC-EQP single-channel equalizer presents a solution worthy of go-to racks around the world. Its design was finalized after a year of study and coordinating with Polish studios; the result is a passive EQ based on coils, resistors, and capacitors combined with a dual-tube amplification circuit. With the addition of Carnill input and output transformers, the LC-EQP is poised to deliver clarity as well as musical tube character.

It features four bands, configured as two boost bands and two cut bands, each with up to 18 dB of gain change. The low boost and cut bands are shelving filters with six frequency options per band. The high boost band is a bell-type filter offering Q control and 11 frequency selections, while the high cut band is a shelving filter with six frequency choices. The LC-EQP also provides a true bypass function with an "on" LED indicator, balanced XLR I/O, and a voltage selector switch.

Carefully Designed
More than a year of careful research and the positive results of tests and consultations with Polish recording studios helped WesAudio complete this musically distinctive and high-quality sound equalizer.
Clean and Clear
The sound of the LC-EQP can be described as clean and clear with a tube nature, an ideal EQ for single tracks and stereo mixes.
Input Circuitry
The input system is based on a Carnhill linear transformer, which matches input impedance. The LC-EQP's input impedance is over 1.5 kilohms. As a result, it does not load the signal source by which it is controlled.
Output Circuitry
The EQ section introduces a high attenuation of more than 25 dB. The signal-restoring amplifier is a tube system based on two triodes, and it has been designed without feedback to avoid distorting transients. Thanks to a Carnhill transformer, the output is symmetrical and low impedance. Plus, the anode and heat voltage are stabilized.
Passive EQ
The equalization block is a passive system based on coils, resistors, and capacitors.
EQ Bands
  • Low Boost (Shelf): Up to +18 dB at 20, 30, 60, 100, 120, or 250 Hz
  • Low Cut (Shelf): Up to -18 dB at 20, 30, 60, 100, 120, or 250 Hz
  • High Boost (Bell): Up to +18 dB at 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 16, or 20 kHz
  • High Cut (Shelf): Up to -18 dB at 2, 4, 6, 12, 16, or 20 kHz
  • Bandwidth: Adjustable for high-boost band
True Bypass
An "EQ In" switch offers true bypass operation. A corresponding LED lights red to indicate "On" mode.
Sturdy Chassis
The 2 RU housing is made from 1.5mm stainless steel, whereas the panel is 4mm-thick aluminum. It utilizes balanced XLR jacks for the input and output.

WesAudio LC-EQP Specs

Filter Type
Passive, Semi-Parametric
Number of Channels
1
Tubes
12AX7 and 12AU7
Inputs
1 x XLR 3-Pin Female Balanced Line Input (Locking)
Outputs
1 x XLR 3-Pin Male Balanced Line Output
Input Impedance
>1.5 Kilohms
Output Impedance
150 Ohms
Maximum Output Level
+22 dBu (0.8% THD)
Frequency Bands
Low Boost (Shelf): 20, 30, 60, 100, 120, or 250 Hz
Low Cut (Shelf): 20, 30, 60, 100, 120, or 250 Hz
High Boost (Bell): 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 16, or 20 kHz
High Cut (Shelf): 2, 4, 6, 12, 16, or 20 kHz
Range (Boost/Cut)
Low Boost: Up to +18 dB
Low Cut: Up to -18 dB
High Boost: Up to +18 dB
High Cut: Up to -18 dB
Gain
0 dB (±0.5 dB)
Frequency Response
5 Hz to 65 kHz (-3 dB)
Signal-to-Noise Ratio
90 dB
Power Requirements
115 VAC, 60 Hz
230 VAC, 50 Hz
Construction Material
Chassis: 0.1" / 1.5 mm Stainless Steel
Front Panel: 0.2" / 4 mm Aluminum
Rack Height
2 RU
Dimensions
19.0 x 3.5 x 9.3" / 48.3 x 8.8 x 23.7 cm
Weight
15.4 lb / 7 kg

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