TECH 21 SansAmp RPM 1U Rackmount Preamplifier with Parametric EQ

TECH 21 SansAmp RPM 1U Rackmount Preamplifier with Parametric EQ

TECH 21 SansAmp RPM 1U Rackmount Preamplifier with Parametric EQ

B&H # TERPM MFR # RPM
TECH 21 SansAmp RPM 1U Rackmount Preamplifier with Parametric EQ

TECH 21 SansAmp RPM 1U Rackmount Preamplifier with Parametric EQ

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Product Highlights

  • SansAmp Pedal Tone in 1RU
  • Designed for Live and Recording Purposes
  • Drive, Blend, and Parametric EQ
  • 2x XLR & 2x 1/4" Outputs
  • Effects Loop
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  • 1Description

Adapted from SansAmp's Acoustic DI pedal, the RPM from Tech21 is a 1U rackmount preamp featuring a parametric EQ. It's suitable for both live and recording purposes. While the unit was designed with guitarists in mind to provide amp-like tones in amplifier-free situations, it can also be used with acoustic and electric basses, outboard synths, or any instrument with a 1/4" output jack.

The RPM offers a drive control, a blend knob (for mixing processed and unprocessed signals), and a comprehensive parametric EQ. Look to the rear of the preamp and you'll notice the ability to output both effected and uneffected signals via pairs of XLR and 1/4" jacks. Additionally, the unit boasts an effects loop with 1/4" connections for send and return.

It is also possible to daisy chain this unit to other SansAmp rackmount modules and control the initiation of each one through the use of a footswitch (available separately).

Drive and Blend Knobs
Adjust the amount of gain and overdrive as you see fit, then blend in dry signal to taste.
Parametric EQ
With the bass and treble knobs affecting 80 Hz and 3.2 kHz respectively, boost or attenuate these frequencies by ±12 dB with the twist of your fingers. You can also manipulate the midrange of a signal, though these specific frequencies are selectable through a dedicated mid shift knob. Thus, in using this EQ, you can achieve many different tones, from hollowed and shrill to thick and growling.
Input/Output Options
The RPM sports 2x 1/4" inputs, one of which offers a switchable -20 dB pad for bringing the signal down to line level. The preamp also features 2x XLR outputs and 2x 1/4" outputs for a very specific purpose: one individual output will port dry signal, while the other will handle processed sound. This is the case for both the XLR and 1/4" pairs. You may find this useful should you wish to record both effected and uneffected signals, or if you wish to utilize more blending opportunities when connecting into a PA. Additionally, both sets of outputs have their own front-panel knobs assigned to them: Level controls the 1/4" outs, while the eponymous XLR knob controls the other set.
Effects Loop
The RPM boasts an effects loop that is switchable between 50/50% and 100% mix modes. 100% mode will apply the effects loop to 100% of the outgoing signal, while 50/50 mode will halve that value. This is much like a blend knob for your effects loop, only with two static positions: fully effected, and half effected/half uneffected.
In the Box
TECH 21 SansAmp RPM 1U Rackmount Preamplifier with Parametric EQ
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
    Input Specifications
    Input Impedances Input 1: 4.7 MOhm
    Input 2: 1 MOhm
    Audio Input Levels Input 1: 1 VRMS max
    Input 2: 1 VRMS or 10 V max, with -20 dB pad engaged
    Input Connections 1x 1/4" Instrument
    1x 1/4" Instrument or Line Level
    Output Specifications
    Output Impedances 1/4" Phone: 1 kOhm min
    XLR: 600 Ohms min
    Output Level XLR: Switchable to -20 dB or 0 dB range
    Maximum Output Level +10 dB or better
    Processing
    Effects Loop 1x 1/4" Send: 1 kOhm min, 20 dB
    1x 1/4" Return: 100 kOhms min, -20 dB
    Front Panel I/O & Controls 1x 1/4" Instrument Input
    DRIVE: Adjusts overall amount of gain and overdrive
    MID SHIFT: Selects center frequency of Mid Control, with a sweep of 170 Hz to 3 kHz
    MID: Active tone control, cut or boost ±12 dB
    BASS: Active tone control, ±12 dB cut or boost at 80 Hz
    TREBLE: Active tone control, ±12 dB cut or boost at 3.2 kHz
    BLEND: Controls mix of dry signal and SansAmp circuitry
    XLR: Controls level of XLR Outputs
    LEVEL: Adjusts overall level of SansAmp Output
    Rear Panel I/O & Controls 1x 1/4" Input, 0 dB or -20 dB
    1x 1/4" Send Jack
    1x 1/4" Return Jack
    1x 1/4" Effected Output
    1x 1/4" Dry Output (No SansAmp processing)
    1x 1/4" Footswitch Input
    1x 1/4" Footswitch Output (for use with other SansAmp RPMs or RBIs)
    1x XLR Affected Output
    1x XLR Dry Output (No SansAmp processing)
    1x Mix 50/50 Switch: Feeds either all or half the signal into the effects loop before SansAmp processing
    2x Level Switches: Sets range signal between line level and instrument level
    Frequency Response Low Frequency: 10 Hz
    High Frequency: 20 kHz
    Power & Other Parameters
    AC Input Power Voltage 100 V, 117 V, 230 V, 250 V
    AC Input Frequency 50/60 Hz
    Enclosure Aluminum and Steel, Fully Shielded
    Dimensions (W x H x D) 19.0 x 1.75 x 5.25" / 483 x 44.5 x 133 mm
    Overall Depth: 6.25" / 152 mm
    Weight 5 lb / 2.3 kg

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