Mastering-grade stepped Pultec EQ with an API 2520 gain stage. The Pultec EQM-1A3-SS is the solid-state version of the EQM-1A3 mastering EQ. Boost and cut pots are replaced with 21-position Elma switches (bandwidth 11-position), with full-range progressive-taper steps: 0.5 dB for the first half of rotation, then larger. The gain stage is a genuine API 2520 op-amp driving a Triad output transformer.
Why customers choose it
Who it is for
Mastering and mix-bus engineers who want repeatable Pultec moves with a punchy solid-state flavour.
Specifications
| Type | Program Equalizer (mastering) |
|---|---|
| Amplifier | API 2520 solid state, Triad output transformer |
| Format | 2U / 19 in |
| Low shelf boost | 20, 30, 60, 100 Hz shelf boost, 0 – 13.5 dB |
| Low shelf cut | 20, 30, 60, 100 Hz shelf attenuate, 0 – 17.5 dB |
| High peak boost | 3, 4, 5, 8, 10, 12, 16 kHz peak boost, 0 – 18 dB |
| High shelf cut | 5, 10, 20 kHz shelf attenuate, 0 – 16 dB |
| Input Impedance | ~600 Ohms |
| Output Impedance | ~50 Ohms |
| Noise | Below -80 dBm |
| Distortion | ≤ 0.15% at 10 dBm into 600 Ohms |
| Amplifier response | 20 Hz to 20 kHz; +0, -1 dB ref 1 kHz including input/output transformers |
| Output Level | +21 dBm maximum |
| Finish | Brushed aluminium |
| Built | By hand, to order, in Fort Collins, Colorado |
| Controls | Stepped (mastering) |
Good to know
- Rack-mount unit for a standard 19-inch rack.
- Hand-built to order by Pulse Techniques in Fort Collins, Colorado.
- Pultec controls interact: when boost and cut are used together, the effective step size changes.
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