The Pultec EQH-2 Program Equalizer is a vintage single-channel, tube-powered program equalizer known for its transparent sound and ability to shape low-end and high-frequency content. It offers a more compact alternative to the Pultec EQP-1A.
The EQH-2 was originally introduced in 1956, as a compact option to the 3U model EQP-1. The low-frequency boost/atten curves are identical to those of the EQP-1A and the high-frequency peak boost frequency centers are comparable to those of the EQP-1A. The EQH-2 has fixed bandwidth for the high-frequency peak boost and a fixed high-frequency attenuation frequency of 10 kHz. The line amp is the same minimalist class A output stage as used in the MEQ-5. Many engineers, among them well-known L.A./Nashville engineer/producer Dave Cobb and Michael Dumas, believe it provides a more transparent sound than the EQP-1A/EQP-1A3.
Pultec EQH-2 Program Equalizer Features
- Tube-driven gain stage: A passive EQ circuit is followed by a Class A tube makeup amplifier to restore the signal level lost during equalization. The tube complement includes 1 x 12AX7, 1 x 6AQ5, and 1 x 6X4.
- Transparent sonic signature: The EQH-2 uses the same Class A output stage as the MEQ-5, giving it a more transparent sound than the EQP-1A.
- Two-band equalization: It features a low-frequency shelf and a high-frequency peak boost.
- Simultaneous boost and attenuation: Like other Pultec EQs, the EQH-2 allows engineers to boost and cut the same frequency range simultaneously. This "Pultec trick" is achieved through the interaction of the separate boost and attenuate controls, creating unique tonal curves.
- Continuously variable controls: All boost and attenuate controls are continuously variable, enabling smooth adjustments without noise or steps in level.
- In-out key: A key switch allows for A/B testing of the equalized and unequalized signal without clicks or level changes.
Pultec EQH-2 Program Equalizer Specifications
- Low Shelf Boost: 20, 30, 60, 100 CPS, 0 – 13.5 dB
- Low Shelf Attenuate: 20, 30, 60, 100 CPS, 0 – 17.5 dB
- High Peak Boost: 3, 5, 8, 10, 12 KCS peak boost, 0 – 18 dB
- High Shelf Attenuate: 10 KCS, 0 – 16 dB
- Input Transformer: 600 Ohms
- Output Transformer: 600 Ohms
- Noise: Below -75 dBm
- Distortion: ≤ 0.15% at +10 dBm into 600 Ohms
- Amplifier: Flat, 20 CPS to 20 KCS, +0 / -1 dB, ref 1 KCS
- Tubes: 1 each 12AX7, 6AQ5, 6X4
Pultec EQH-2 Program Equalizer Includes
- Pultec EQH-2 Program Equalizer
- Power Cable
- Manufacturer Warranty
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