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Introduction

Why a specific Booster for bass instruments? The reasons are obvious: the 
frequency range of bass instruments goes from very deep fundamentals 
(e.g. 30.87 Hz for low B or 41.20 Hz for low E on an electric bass) to very 
high overtones that have a crucial impact on the timbre of the bass instru-
ment even though they are approaching the upper limits of the audible 
spectrum (from 18 Hz to 20 kHz). On top of this, bass instruments have a 
characteristic attack with a very steep initial transient followed by a weak 
electrical signal. 

These characteristics of bass signals make enormous demands on the 
electronics, with the result that the handling of bass signals by most 
equipment is unsatisfactory and inconsistent in quality. Only equipment 
specifically designed for the purpose is able to handle such a demanding 
signal pattern adequately.  

Functions and applications overview

- The Basswitch Classic Boost used as a booster

The primary application field of the Basswitch is the one as booster with 
an adjustable EQ. Used as such the Basswitch Classic Boost puts at your 
disposal a louder tone and/or a second sound setting for your instrument 
at the push of a footswitch. 

Note: The Gain control has a volume cut and boost function to allow 
a perfect match of the desired tone levels.

- The Basswitch Classic Boost as a high-end preamp 

The Basswitch Classic Boost features a high-end preamp and a 3-band 
EQ specifically designed for bass instruments and featuring bass, mids, 
and treble controls. As a stand-alone preamp, the Basswitch Classic 

Boost can drive a power amp, an active monitor, an active bass speaker  
cabinet or an in-ear monitoring system.   

Additional features

- Lehle “True Sound Technology” (for details please consult the chapter 

“Tech Talk”). 

- Specially designed to protect the controls from damage and to prevent 

inadvertent changes to the settings.

- The design of the housing permits easy installation: the ultra-flat base 

and removable rubber feet allow the unit to be securely attached to the 
pedal-board using Velcro or similar. 

Description

1. Input IN

Connect your first instrument here.

This is the standard input for all instruments. The input is designed to 
accept active and passive instruments. 

2. Output OUT

Connect your bass amp or power amplifier or active monitor here.

If the Basswitch Classic Boost is used in its function as booster upstream 
of a bass amp, it should be in “straight through” mode (LED lights white) 
when the settings for the basic sound are made on the amplifier. Only af-
ter that the tone for solos, a second sound or a second instrument should 
be set on the Basswitch Classic Boost. 
If the Basswitch Classic Boost is used as a preamp upstream of a power 
amp to drive a power amp, an active monitor, an active bass speaker 

With the Basswitch Classic Boost you have purchased a super compact 
high-end bass preamp gently voiced for passive P, JJ and PJ type basses 
that gives you the confidence to be adequately prepared for any situation, 
be it in a live performance or in a recording studio.

When developing the Basswitch Classic Boost we focused on the needs and 
wishes of the professional bass player who is not willing to compromise 
on either sound or the technical quality of the equipment. The Basswitch 
Classic Boost is manufactured, assembled and tested in Germany to the 
highest quality standards using only the best brand components available 
to ensure optimal treatment of the electrical signal from your instrument.

Please take your time to read this user manual carefully before you start 
using your Basswitch Classic Boost. You will find lots of useful information 
on the pedal and the various ways it can be used. Keep this user manual 

carefully so that you can consult it at any time.

Your Basswitch Classic Boost package contains the following items:
 

- Basswitch Classic Boost

 

- User manual

Please check that all these items are there as soon as you unpack. Should 
something be missing, please contact your authorised dealer.

The Basswitch Classic Boost is built to last, but if you nonetheless experi-
ence problems or have any questions do not hesitate to contact us. 

I wish you every success with your Basswitch Classic Boost.      

 

 

                         

        

Yours, 

Jacques Ruppert

Summary

Introduction 2
Description 2
Tech Talk 

3

Technical data 

4

2

Congratulations!

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