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EBS STANLEY CLARKE - User Manual

EBS STANLEY CLARKE
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USERS MANUAL
EBS STANLEY CLARKE PREAMP
www.ebssweden.comwww.ebssweden.com
EBS STANLEY CLARKE
SIGNATURE ACOUSTIC PREAMP
USERS MANUAL
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Summary

Channel Controls, Switches & Outputs

MID Controls

Controls the gain and frequency for the mid-range frequencies on both channels.

MASTER Volume Control

Adjusts the overall output volume for the main output jack.

BASS Filter

A shelving type filter for adjusting bass frequencies with a wide gain range.

PHASE Switch

Inverts the phase of the A channel's signal when needed.

MUTE FOOT SWITCH

Mutes all outputs except the FX Send, useful for silent changes.

ELECTRET FUNCTION

Switch for using Electret pickups on the A channel (INPUT).

Reference Guide

FILTER TYPE Selection

Selects between High Pass or Notch filter functions for the preamplifier.

SOURCE Input Selection

Sets the input source for channel B to 1/4" or XLR.

GAIN Adjustment

Controls the input signal level for optimal signal processing.

TREBLE Filter

A shelving filter for adjusting treble and upper mid-range frequencies.

FILTER Control

Works with TYPE switch to adjust High Pass or Notch filter frequency.

A;B FOOT SWITCH

Selects between input channels A, B, or A+B.

TUNER OUT

Output taken at FX send, active when Mute is on, for tuner connection.

FX LOOP

Allows connection of external effects in parallel mode via TRS cable.

MASTER OUTPUT

The main output jack for connecting to an amplifier or power amplifier.

CHANNEL B INPUT

Direct input for channel B or both A+B when A+B switch is inner.

A+B INPUT MIX

Manages input signal routing between channels A, B, and A+B.

A CHANNEL INPUT

High impedance, low noise instrument input for channel A.

Connections and Features

MIC INPUT

Input for +48V Phantom microphones on channel B.

BALANCED OUTPUT

Sends a balanced output signal after equalization.

SPEAKER SIMULATION

Adds an emulated speaker simulation to the balanced output.

GND LIFT Switch

Eliminates ground noise and hum by disconnecting the ground.

AUXILIARY INPUT

Input for monitoring with headphones, volume adjusted by source.

PHONES OUTPUT

Jack for connecting headphones for silent practice.

DC INPUT

Connection point for the 9V DC power supply.

Technical Specifications

Channel Specifications

Details input impedance, gain, and filter characteristics.

Common Features

Details for effects loop, outputs, and inputs.

Auxiliary Information

Covers power requirements, dimensions, and weight.

Overview

The EBS Stanley Clarke Signature Acoustic Preamp is a versatile and high-quality preamplifier designed for acoustic instruments, offering a comprehensive suite of controls for shaping your sound. This device is engineered to provide exceptional clarity, presence, and ambiance, making it suitable for both live performance and studio recording.

Function Description:

At its core, the EBS Stanley Clarke Preamp is a two-channel acoustic preamplifier, allowing for the simultaneous connection and processing of two different instruments or a single instrument with two distinct pickup systems. Each channel (A and B) is equipped with independent controls for gain, bass, mid-range, and treble, providing extensive sound-sculpting capabilities.

The preamp features a MIC INPUT (XLR) with +48V phantom power, enabling the use of condenser microphones for channel B. This is particularly useful for capturing the natural acoustic sound of an instrument. The INPUT for channel A is a low-noise, high-impedance instrument input, ideal for passive or active pickups.

A key feature is the FILTER section on each channel, which can be set to either High Pass (HP) or Notch mode. The High Pass filter helps to remove unwanted low-end rumble, while the Notch filter is invaluable for eliminating feedback frequencies. The TYPE switch determines the function of the filter knob, with HP being the default.

The BALANCED OUTPUT (XLR) provides a high-quality 'line box' signal, suitable for connecting directly to PA mixing consoles, studio recording units, or broadcast equipment. This output is designed with high noise immunity and is unaffected by the master volume knob, ensuring a consistent signal level to the front-of-house or recording engineer. An additional SIM switch allows for the engagement of an emulated speaker simulation on the balanced output, adding a cabinet-like character to the sound. The GND LIFT switch helps eliminate ground noise and hum by disconnecting the ground from the balanced output when needed.

For monitoring and practice, the preamp includes a PHONES output for silent practicing and an AUX IN for connecting external audio sources like an MP3 player. The volume for the headphones is controlled by the master knob, while the Aux In level should be adjusted at the source.

The TUNER OUT provides a convenient connection for an external tuner. This output is taken from the FX send and becomes active when the mute function is engaged, allowing for silent tuning.

An FX LOOP is also integrated, allowing users to insert external effects pedals in parallel mode. This loop uses a TRS cable, where the ring acts as the SEND and the tip as the RETURN, offering flexibility in effects routing.

Usage Features:

The preamp is designed for intuitive and flexible use, catering to various performance and recording scenarios.

Channel Controls:

  • VOLUME: Controls the overall output volume of the master output jack. The balanced output (XLR) remains unaffected by this control.
  • BASS: A 'shelving' type filter with a wide gain range, identical on both channels, allowing for boosting or cutting low frequencies.
  • MID: Two knobs work in conjunction. The left knob selects a frequency, and the right knob boosts or cuts the gain within that chosen frequency range. These controls are identical on both channels, providing precise mid-range shaping.
  • TREBLE: A shelving type filter that controls higher mids and treble registers, adding presence and ambiance to the sound. Identical on both channels.
  • GAIN: Adjusts the input signal level for each channel. The optimal level is achieved when the peak LED (red for channel A, yellow for channel B) flashes when playing hard, indicating a correctly set gain for proper signal processing.
  • PHASE: This switch inverts the phase of channel A, which can be useful for resolving phase issues when blending multiple pickups or microphones.
  • ELECTRET FUNCTION: This switch should generally be set to OFF. It is only engaged when using an Electret pickup on channel A (INPUT).
  • SOURCE: For channel B, this switch selects the input source between the 1/4" CH B Input or the XLR MIC Input.

Foot Switches:

  • MUTE FOOT SWITCH: Mutes both the balanced outputs and the master output, allowing for silent instrument changes or tuning. The FX Send remains active during mute.
  • A/B FOOT SWITCH: This versatile switch offers different functionalities depending on its position:
    • OUTER Position: When only the A input (INPUT) is used, this position selects between channel A or channel B. If the XLR input or B channel 1/4" jack is used simultaneously, B selects this source.
    • INNER Position: When only the A input is used, this position selects between channel A or channel A in series with channel B. If the B channel input jack or XLR is used for channel B, both channels are mixed together, and the A/B foot switch has no effect. This allows for blending two signals or using two channels in series for more complex tone shaping.

Connectivity:

  • INPUT (A): Low noise, high impedance instrument input for channel A.
  • CH B INPUT: Direct 1/4" input for channel B.
  • MIC INPUT (XLR): For condenser microphones with +48V phantom power for channel B.
  • TUNER OUT: Dedicated output for connecting a tuner.
  • FX LOOP (SEND/RETURN): For integrating external effects pedals in parallel.
  • OUTPUT: Master output jack for connecting to an amplifier or power amplifier.
  • BALANCED OUTPUT (XLR): Professional balanced output for PA systems or recording.
  • AUX IN: 3.5mm input for external audio sources.
  • PHONES: Headphone output for silent practice.
  • DC INPUT: Power supply connection (9V DC, 1000 mA).

Maintenance Features:

The EBS Stanley Clarke Preamp is built with professional-grade components, ensuring reliability and durability. While specific maintenance instructions are not detailed in the provided manual, general best practices for electronic devices apply:

  • Power Supply: Always use the supplied 9V DC, 1000 mA power supply to ensure proper operation and prevent damage.
  • Cleaning: Keep the unit clean and free from dust and debris. Use a soft, dry cloth for cleaning. Avoid liquid cleaners that could seep into the electronics.
  • Environmental Protection: Protect the device from extreme temperatures, humidity, and direct sunlight.
  • Cable Management: Use high-quality cables and ensure they are properly connected to prevent signal loss or damage to the jacks.
  • Storage: When not in use, store the preamp in a safe place, preferably in a protective case, to prevent physical damage.

The robust design and comprehensive feature set of the EBS Stanley Clarke Signature Acoustic Preamp make it a powerful tool for any acoustic musician seeking precise control over their sound and reliable performance in various professional environments.

EBS STANLEY CLARKE Specifications

General IconGeneral
TypeBass Amplifier
Solid State/TubeSolid State
Number of Channels1
Inputs1 x 1/4"
Effects LoopYes
Impedance4 ohms
Outputs1 x XLR
Footswitch I/OYes
Frequency Response20 Hz - 20 kHz
EQ4-band EQ with semi-parametric mid control

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