SPS-1 Stereo Preamp

Something for Everyone

Since its introduction in 1993, Pendulum's SPS-1 has been recognized as the world leader in sound quality and flexibility for processing your acoustic instruments in true stereo. With two channels of fully parametric EQ and studio-quality mic preamps, the SPS-1 can easily adapt to any combination of instrument pickups, internal mics, or external mics.

Use the SPS-1 with our two pickup preamp modules (Pickup/Pickup or Pickup/Mic) to individually process two pickups or a pickup and an internal mic in stereo. Or, blend two pickups in Channel 1 with an external instrument or vocal mic in Channel 2. Run a single or two pickup instrument into each channel. Hang a stereo pair of studio mics out in front of your instrument and go direct to DAT or multitrack. Use it as two channels of parametric EQ during mixdown. The choice is up to you.

And all this flexibility comes with no sacrifice in sound quality. We've still got the cleanest, quietest, warmest all-analog signal path in the business. It's the reason that Pendulum is the choice of serious acoustic players, both on stage and in the studio. Just look at the features we've stuffed into a single rack space!

Specifications

Main Preamp Unit

Module/Mic Input: 3-pin XLR, balanced
Line In: 1/4" phone jack, unbalanced, 10Kohm
Insert: 1/4" stereo jack, tip=send, ring=return
Mic Preamp:  EIN less than -128 dBu, 50dB gain
Frequency Response: +0/-1 dB, 20 - 20,000 Hz
Distortion: THD less than 0.007% at 0 dBu
Output Noise: EQ out, unity gain: less than - 93 dBu, EQ in, set flat: less than - 88 dBu
Maximum Output: +21 dBu, unbalanced, +27 dBu, balanced
Channel Outputs: 1/4" phone jack, TRS balanced, 600 ohm
Master Outputs: XLR, balanced, pin 2 in phase, 600 ohm
Monitor Outputs: 1/4" phone jack, unbalanced, 600 ohm
Effects Sends: 1/4" phone jack, unbalanced, 600 ohm
Effect Returns: 1/4" phone jack, unbalanced, 10Kohm
Tuner Output: 1/4" phone jack, unbalanced, 10Kohm
Phones: 1/4" stereo phone jack, 100 ohm
Metering: Signal (green): -20 dBu; Peak(red): +14 dBu
Equalizer: Three band fully parametric, ± 15 dB boost/cut
Lo: 35 - 880Hz, 0.1 to 1.0 octave (Q=10 to 1)
Mid: 180Hz - 4.2kHz, 0.3 to 1.0 oct. (Q=3 to 1)
Hi : 0.84 to 19kHz, 0.3 to 1.0 oct. (Q=3 to 1)
Phantom Power: +48 Vdc applied to pins 2 and 3
Foot Switch: 1/4" TRS phone jack, 10 mA current loop
Power: 120 VAC, 10 Watts

Preamp Modules

Input (Piezo or Magnetic): 10 Mohm, unbalanced
Input (mini-mic): 15Kohm, unbalanced, +9 Vdc power to mic
Maximum Input Level: +15.5 dBu (4.6 Vrms)
Input Noise: EIN less than -113 dBu, input shorted
Frequency Response: +0/-1 dB, 20 - 20,000 Hz
Distortion: THD less than 0.01% at 0 dBu
Gain: 0 to +20 dB, adjustable
Output: Balanced, 3-pin mini-connector

Dimensions

Preamp Module: 1.1" x 2.2" x 1.0", excluding input plug
Main Preamp Unit: 1.75" x 19" x 8" (1 rack space), 6 lbs
Foot Switch: 4.3" x 2.3" x 1.2"

Preamp Modules

Notes:
0dBu = 0.775 Vrms
All noise measurements are unweighted, 20 - 20,000 Hz bandwidth
All Specifications are subject to change without notice