Stanley Clarke Signature Preamp

Stanley Clarke Signature Preamp

The EBS Stanley Clarke Signature Acoustic Preamp is designed to overcome the challenges of amplifying acoustic instruments like the upright bass, offering superior sound quality, powerful filters, and essential features.

Engineered and designed by EBS in collaboration with legendary bass player and composer Stanley Clarke, this 2-channel preamp is built exclusively with premium components.
Operating at a professional mixing console signal level, the preamp provides ample headroom and superior signal quality, making it ideal for use with any power amp. Its design is perfectly suited to handle the complex sonic characteristics of an upright bass.

Each of the two channels features an input gain control and a versatile EQ strip with bass, mids (where you select the frequency range with one knob and boost or cut with another), and treble. Both channels include a unique control knob that acts as either a high-pass or notch filter, selectable by a switch, to prevent unwanted feedback and tailor the sound to your instrument and room acoustics.

With 10 MΩ input impedance on both channels, the preamp works with passive, active, or high-impedance piezo pickups. The A channel supports Electret pickups via a dedicated switch. The B channel accepts a 48V phantom-powered or passive dynamic/condenser microphone through an XLR input, with a switch to select between XLR and 1/4″ inputs. You can switch between channels or blend them, for example, to mix bow and pizzicato playing styles. To address possible phase issues when blending inputs, a Phase Inverter switch is included on channel A.

Important: Newer models have a phantom power on/off switch. On original versions, phantom power is always on. Do not connect microphones sensitive to 48V, such as passive ribbon mics, to the XLR input on older models. Instead, use the 1/4″ input on channel B to avoid damage.

Additional features include an effects loop (serial or parallel, requiring a Y-split insert cable), a tuner output, and a balanced XLR output for studio-quality signal to front-of-house or recording devices. The balanced output works with a speaker simulator and includes a ground lift to eliminate hum. The aux input and professional-grade headphone output make practicing and learning easier.

This pedal is also suitable for other acoustic or electric instruments, covering a wide and complex frequency range. Electric bass players may benefit from the dual channels for individual EQ settings and smooth switching between instruments during gigs.

Features

Preamp Channels

2-channel analog preamp (A/B or A+B)

Signal Quality

Operates with Studio-grade signal quality

Input Impedance

10 Mohm Impedance inputs (both channels)

Filters

Individual High Pass/Notch Filter for each channel

Microphone Input

XLR microphone-input with Phantom Power (channel B)

Pickup Support

Electret pickup support (channel A)

Tuner Output

Yes

Effects Loop

Effects Loop (serial/parallel)

Balanced Output

With Speaker Simulator and Ground Lift

Aux Input & Headphones

Aux Input and professional-grade headphones output

Power Supply

Dedicated 9V DC Power Supply included

Specs

Channel Specifications: Input Impedance

10 Mohms, 22 pF

Gain

Gain Range -∞ / +30 dB, Gain Peak LED (ch A = RED, B = yellow) +10 dBv, Frequency Response +0 / -3 dB 20 – 20,000 Hz

Bass Filter

Type Shelving, Gain Range +/- 15 dB @ 40 Hz

Mid Filter

Type Bandpass Filter, Gain Range +/- 13 dB, Frequency Range 70 – 2,500 Hz, Q 0.8

Treble Filter

Type Shelving, Gain Range +/- 15 dB @ 10 kHz

HP Filter

Type 12 dB/octave High Pass, Frequency Range 20 (off) – 450 Hz

Notch Filter

Type Bandpass Notch, Frequency Range 70 – 2,200 Hz, Q 7, Attenuation 7 dB (typically)

Electret Power (Channel A)

5V, 2mA

Common Features: Effects Loop

Loop Signal Level -10 dBv (nominal), Gain Unity (1:1), Output Impedance 2 kohms, Input Impedance 100 kohms, Modes Serial or Parallel

Phones Out

Recommended Impedance 32 – 200 ohms

Aux Input

Input Impedance 20 kohms, Nominal Level -10 dBv

Output

Output Impedance 1 kohms, Signal Level 0 dBv (nominal)

Balanced Output

Output Level -20 dBv (nominal), XLR Connections 1-GND, 2-Hot, 3-Cold, Options Gnd Lift, SPKR Sim

Balanced Input (Channel B)

Input Level -30 dBv (nominal), XLR Connections 1-GND, 2-Hot, 3-Cold, 48V Phantom Yes

Auxiliary Info

Power Requirements Idle 500mA @ 9V, Max 800mA @ 9V (with headphones at max output level)

Dimensions (WxDxH)

max 168 x 124 x 53 mm / 6.6″ x 4.9″ x 2.1″

Weight

660 g (1.5 lbs.)

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