Pultec EQM-1S3 Matched Pair

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Mastering Pultec EQ featuring 0.5dB stepped controls and additional high shelf frequencies

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The Pultec EQM-1S3 Matched Pair includes two EQM-1S3 Mastering EQ with reduced boost and cut and stepped controls and carefully matched components for stereo compatibility.
The Pultec EQM-1S3 Matched Pair is a modern adaptation of the rare EQP-1S3 specifically designed for mastering applications by Dr Steve Jackson and using only original-spec components to deliver the same sound of vintage units. As such, it boasts stepped controls throughout with 0.5 dB of cut or boost for each step, allowing for precise setting and easy recalls. The cut and boost for each band has also been reduced to up to 10 dB instead of the 16dB found on the original units.
This modern iteration of the Pultec EQ provides the same sonic signature as the original EQP-1A such as its silky smooth top end and huge and tight bass. However, the EQM-1S3 includes different EQ curves and more frequency points offering small tonal differences and added flexibility.
Using a two-band passive design with separate boost and cut controls the EQM-1S3 is particularly musical and allows you to create a resonant shelf curve, boosting an area while keeping any of the unwanted frequency build-ups under control. Used in mastering, these curves provide a powerful way to add weight to a song without boxiness or increase presence or air without the song ever sounding harsh. The HF band also gives you more frequency points with the first 9 frequencies working as a peak and the last two being shelves. This difference is notable as peaks might often be more preferable than shelves to avoid lifting unwanted frequencies. The different frequency points are:

Low Shelf Boost/Cut: 30kcs 40kcs, 70kcs and 100kcs
High Bell Boost:1kcs, 2kcs, 3kcs, 4kcs, 5kcs, 6kcs, 8kcs, 10kcs, 12kcs
High Shelf Boost: 5kcs, 10kcs
High Shelf Cut: 5kc, 10kc, 20kc

The EQM-1S3 boasts the same gain makeup architecture as the EQP-1A, with a valve-driven push-pull design placed after the EQ to compensate for the loss of volume associated with passive EQs and keeping an incredibly low noise floor.
Pultec EQM1-S3 Matched Pair Main Features:

Boost, cut, or both – it all sounds great
Imbue your tracks with the stuff of legend
Thank Pultec for decades of amazing recordings
Single-channel, two-band equalizer built exactly like the original, legendary Pultec units
Combines the vintage character of original Pultecs with the reliability of modern design
Incredibly low noise floor for a pure sound
Bandwidth control lets you decide how wide a range you’re sculpting
Separate boost and cut controls provide additional creative potential
Precise stepped controls for accurate recall
More selectable frequencies than the Pultec EQM-1A3

Specifications:

Low shelf boost: +10 dB in .5 dB steps @ 30, 40, 70, 100 Hz
Low shelf attenuate: -10 dB in .5 dB steps @ 30, 40, 70, 100 Hz
Mid/high peak boost: +10 dB in .5 dB steps@ 1, 2, 3, 4, 5, 6, 8, 10, 12 kHz
High shelf boost: +8 dB db in .5 dB steps @ 5, 10 kHz
High shelf attenuate: -10 dB in .5 dB steps @ 5, 10, 20 kHz
Precision mastering-grade 21-position boost/cut rotary switches
Input impedance: ~600 ohms
Output impedance: ~50 ohms
Noise: 92 dB below +10 dBm
Distortion: ≤ 0.15% at +10 dBm into 600 ohms
Amplifier: Flat, 20 Hz to 20 kHz, +/- 0.5 dB
Tubes: 1 each – 12AU7, 12AX7, 6X4

Brand

Pulse Techniques

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