Lehle Sunday Driver SW Operating instructions

Lehle Sunday Driver SW

Operating instructions

Lehle GmbH • Grenzstr. 153 • D-46562 Voerde • Germany • Tel [phone]

www.lehle.com

Dear Musician!

Thank you for purchasing the Lehle Sunday Driver SW!
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 Sunday Driver SW comprises only the very
best components. Every assembly of your Lehle Sunday Driver
SW has been made and tested in Germany.
Your Lehle Sunday Driver SW 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
Sunday Driver SW!

Burkhard Georg Lehle

Contents

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

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

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

Typical uses

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Signal flow chart of the Lehle

Sunday Driver SW

Sunday Driver SW

Sunday Driver SW

Sunday Driver SW

Sunday Driver SW

Sunday Driver SW

Sunday Driver SW

as a cable driver ..................................................................... 9

as a line driver ...................................................................... 10

as a switch-in booster ............................................................ 12

as a recording preamp .......................................................... 13

as a recording preamp combined with the Lehle P-Split II ......... 15

as a preamp for mixer inputs ................................................. 17

................................................................... 18

1

The Lehle Sunday Driver SW is a compact­format high-end preamp for all types of electrical
and acoustic instruments - a preamp that enables
electric guitars and basses, acoustic guitars, and
also other stringed instruments (such as violins,
cellos and double basses) to realize all of their
musical potential.

The Lehle Sunday Driver SW, with its high­quality JFET technology, provides two operating
modes. In mode D for “Driver” (switcher pressed),
the input signal is amplified with zero modifica­tion, to eliminate the signal loss that long cable
routings and/or effects chains can cause. The
signal remains powerful and clear, and retains
its dynamics. Mode S for “Sunday” (switcher not
pressed) multiplies the input impedance by four,
bringing out previously inaudible details and, as
gain increases, imparting to the guitar a cha­racteristic and unmistakable warmth. There is
no distortion at any stage, and the signal always
stays clean, even at a maximum gain setting of 15
dB. Thanks to its studio-standard signal-to-noise
ratio of better than -100 dB, the Lehle Sunday
Driver SW is totally free of background noise. To

2

exploit the dynamics of tube amplifiers to the full,
the input voltage is also rectified from the power
supply socket, then filtered, stabilized and doubled
to 18V.
In OFF status, the Lehle Sunday Driver SW
provides two different modes of operation - in TB
for “True Bypass” mode, the input and output are
linked with zero losses to one another via a switch
with gold-plated contacts. TB mode is the best
option for a small setup with short cable routings
and with a treble booster or a classical fuzz pedal
is looped in after the Lehle Sunday Driver SW.
The line driver function, located at the start of the
train or in an effect chain, is the better solution
for long cables and for complex effect board
configurations. Switch the Lehle Sunday Driver
SW to TS for “True Sound” mode, and it is active
as a buffer, without amplifying or modifying the
signal in any way. In this mode, the Lehle Sun-
day Driver SW operates as a totally neutral line
driver. The Bypass mode option enables the Lehle
Sunday Driver SW to integrate ideally into any
setup, whether as a battery-operated stand-alone
unit, or in an existing pedal board, not only on a
sunday, but any other weekday, too.

Technical data

Weight: 378 g (without battery)
Length: 9 cm
Width: 9.6 cm
Overall height: 4.8 cm
Voltage range: 9 - 20 V AC or DC, or 9V PP3 battery
Max. power battery take-up: 9 mA (OFF), 28 mA (ON)
Frequency response: 20 Hz - 100 kHz (in mode D)
Distortion: 0.001 % at 1kHz, 0 dBU
Impedance, Input D: 1 MOhm
Impedance, Input S: 4 MOhm
Impedance, Output: 150 Ohm
Signal-to-noise ratio: -105 dB at 1kHz, 0 dBU (A-weighted)
Max. level: 5.7 V RMS (approx. 17 dBU)
Max. gain: 15 dB

3

General description

4