The EQP-500X provides the signature sonic character of Pultec EQs but with the increased punch and tighter low-end of a solid-state design, leveraging an API 2520 op-amp and original-spec Triad transformers to deliver reliable, high-fidelity sound for tracking and mixing. In the early 1970s, after condensing the classic 3U model EQP-1A into the 2U form-factor model EQP-1A3, Pulse introduced a solid-state line amp version of the EQP-1A3. These units have exactly the same front end (input transformer and passive EQ section) but utilize a solid-state opamp (genuine API 2520) gain stage driving a Triad output transformer. Many users of this version of the Pultec describe them as “more punchy” and having “a tighter low end” than the tube version. Pulse has taken this proven design to the next stage by packing them into the 500-series form factor as the EQP-500X module. These may come in a smaller package, but don’t be fooled! These EQs deliver all of the punch, mojo and sonic impact of their full-sized counterparts.

• Solid-state design: Instead of the vacuum tubes found in some classic Pultec units, this version uses an API 2520 op-amp for a tighter low-end and clear tone, with very low noise.
• Classic Pultec sound: Despite its modern components, it maintains the musicality and depth that has made Pultec EQs legendary.
• Passive EQ circuit: The unit's EQ section uses a passive circuit with an active solid-state gain stage for makeup gain.
• "Pultec trick": The separate boost and cut controls for the low band allow for the classic Pultec technique of simultaneous boost and attenuation, which creates a resonant peak and a gentle notch. This is effective for sculpting the low end of kick drums and bass.
• Bandwidth control: A variable control allows for shaping the Q of the high-frequency boost, from a sharp to a broad curve.

• Low Shelf Boost: 30, 40, 70, 100 CPS, 0 – 13.5 dB
• Low Shelf Attenuate: 30, 40, 70, 100 CPS, 0 – 17.5 dB
• High Peak Boost: 1, 2, 3, 4, 5, 8, 10, 12, 16 KCS, 0 – 18 dB; 5, 10 KCS shelf boost, 0 – 14 dB
• High Shelf Attenuate: 5, 10, 20 KCS, 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: 20 CPS to 20 KCS; +0, -1 dB ref 1 KCS including input/output xfmrs
• Output Level: +21 dBm maximum

• Pultec EQP-500X 500-Series Program Equalizer
• Manufacturer Warranty