Lehle Parallel M, Parallel L Operating Instructions Manual

Lehle Parallel M

Operating instructions

Lehle Gitarrentechnik • Im Hundsbusch 11 • D-46562 Voerde • Tel [phone]

www.lehle.com

Dear Musician!

Thank you for purchasing the Lehle Parallel M!
I have been building units that switch, split and route signals with
no technical compromises and with maximum musical fidelity since

1999. Your new Lehle Parallel M comprises only the very best
components. Every assembly of your Lehle Parallel M has been
made and tested in Germany.
Your Lehle Parallel M is of extremely robust design and construc­tion, to make sure that you get absolutely years and years of enjoy­ment from it. If you should nonetheless have a problem, or simply a
question, just mail me or a member of the Lehle team at:
[e-mail]

I wish you the very greatest pleasure and success using your Lehle
Parallel M!

Burkhard Georg Lehle

1

Contents

Introduction ...............................................................................................................................2

Technical data ...........................................................................................................................3

General description ...................................................................................................................4

Typical uses

- Lehle Parallel M for parallel effect loops ........................................................................9

- Using the Lehle Parallel M to insert effects into the effects loop of an amplifier................11

- Using the Lehle Parallel M to mix two input signals .......................................................13

- Using the Lehle Parallel M to mix two pick-ups from one instrument ............................... 15

- Using the Lehle Parallel M as a active DI box ................................................................17

Signal flow chart of the Lehle Parallel M ................................................................................ 18

2

The Lehle Parallel M is a compact and versatile
line mixer to meet demanding tonal standards.
The Lehle Parallel M mixes the signals from
effect units into the original signal, either before
the amp or inserted into its effects loop. Send
and return levels, as well as the mix ratio to the
original signal can be adjusted separately using
the respective controller. The send and return
paths can, of course, be operated both balanced
and unbalanced. The great dynamic range of
the Lehle Parallel M makes it possible to mix
into the guitar signal a 19” studio effect with its
low-impedance line level, for example, or to insert
effects pedals level-adjusted via the amp’s effects
loop.
Thanks to their JFET technology, the Lehle Par-
allel M’s inputs can handle both high-impedance
signals from electric guitars and basses or acoustic
instruments, and low-impedance signals from

keyboards and active electric guitars and basses
with a broad output range extending from 20 to
100,000 Hz.
To exploit the dynamics of tube amplifiers to the
full, the input voltage is rectified from the power
supply socket, then filtered, stabilized and doubled
to 18V.
The Lehle Parallel is available in two versions,
the Parallel L, featuring a True-Bypass switch
with gold-plated contacts, and the Parallel M, a
straight mixer.

3

Technical data

Weight: 521 g (without battery)
Length: 10 cm (3.9”)
Width: 12,2 cm (4.8”)
Overall height: 3,9 cm (1.5”)
Voltage range: 9 - 20 V AC or DC, or 9V PP3 battery
Max. power take-up: 37 mA with battery, 63 mA with an extern. power supply
Frequency response: 20 Hz - 100 kHz
Distortion: 0,003 % at 1kHz, 0 dBU
Impedance, Input: 1 MOhm
Impedance, Return: 1 MOhm
Impedance, Output: 100 Ohm
Impedance, Send: 100 Ohm
Signal-to-noise ratio: -91dB at 1kHz, 0 dBU (A-weighted)
Max. level: 5,3 V RMS (approx. 16 dBU)
Max. gain/ loss Send and Return: +/- 15 dB

4

General Description

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