Perfect for any source demanding smooth top end and big powerful bottom end response. The controls reminiscent of the classic Pultec EQP-1A.

Bypass switch

SPA690 all discrete legendary amp blocks

Differential balance input transformer

Balance output transformer

Double-wide module fits in standard 500 series rack slots configuration mechanically and electrically

Input Impedance:
600 ohms balance

Output Impedance:
600 ohms balance

Frequency Response:
+/- 0.5dB to 50KHz

Output Signal to Noise:
-95dB or greater

THD + Noise:
.01% @ 1KHz/+4dBu

Hi Mid Band Controls:
Frequency switch selects: 4K, 8K, 12K, 16K, 20KCS
-16dB cut level

Mid Band Peak Controls:
Frequency switch selects: 1K, 2K, 3K, 4K, 5K, 8K, 10K, 12K, 16KCS
Bandwidth control
+14dB boost level

Lo Band Shelf Controls:
Frequency switch selects: 20Hz, 30Hz, 60Hz, 90Hz, 120Hz
-16dB cut level
+14dB boost level