Lehle Sunday Driver Manuel utilisateur
Lehle Sunday Driver
Operating instructions
www.lehle.com
Lehle GmbH • Grenzstr. 153 • D-46562 Voerde • Germany • Tel +49 (0) 2855 850070
Dear Musician!
Thank you for purchasing the Lehle Sunday Driver!
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 comprises only the very best
components. Every assembly of your Lehle Sunday Driver has
been made and tested in Germany.
Your Lehle Sunday Driver 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:
I wish you the very greatest pleasure and success using your Lehle
Sunday Driver!
Burkhard Georg Lehle
Contents
Introduction............................................................................................................................... 2
Technical data ........................................................................................................................... 3
General description ................................................................................................................... 4
Typical uses
- Lehle Sunday Driver as a cable driver............................................................................ 8
- Lehle Sunday Driver as a line driver .............................................................................. 9
- Lehle Sunday Driver as a booster ................................................................................ 11
- Lehle Sunday Driver as a switch-in booster .................................................................. 12
- Lehle Sunday Driver as a recording preamp ................................................................ 14
- Lehle Sunday Driver as a recording preamp combined with the Lehle P-Split II............... 15
- Lehle Sunday Driver as a preamp for mixer inputs........................................................ 17
1
The Lehle Sunday Driver is equally suitable for
preamplification of both electric and acoustic in-
struments. This preamp allows electric guitars and
basses, acoustic guitars, and also other stringed
instruments of any type (e.g. violins, cellos and
double basses) to show their full sound coloration.
The Lehle Sunday Driver is a handy, compact-
format high end preamp. Equipped with modern
JFET circuitry, the Lehle Sunday Driver features
two alternative modes of operation: in mode D for
“Driver“ (switcher pressed), the incoming signal is
amplified totally neutral, i.e., with absolutely no
modification, to eliminate the signal losses which
can occur as a result of long cable runs and ef-
fects cascades. The signal is kept strong and clear,
and retains its full dynamics. Mode S for “Sunday“
(switcher not pressed) features a quadrupled input
impedance; previously hidden details now sud-
denly become audible and, as gain increases, the
sound takes on the unmistakable, characteristic
warmth that gives the Lehle Sunday Driver
its name a sound as mellow as a warm Sunday
afternoon! There is no signal distortion at any
time, and the signal remains clean even at the
maximum gain setting of 15 dB and thanks to
its studio-quality signal-to-noise ratio of more
than -100 dB, the Lehle Sunday Driver is totally
free of background noise. A high-quality switch
featuring gold-plated contacts is used to select the
required mode.
To permit exploitation of the dynamics of tube
amplifiers to the full, the input voltage is rectified,
filtered, stabilized and then doubled to 18V after
the power-supply socket.
The compact format of the Lehle Sunday Driver
opens up a large range of potential applications
for this new preamp: it can be used, for example,
as a cable driver for large stages, or in complex
effects set-ups. In the studio, it is used, thanks to its
wide transmission range of 20 to 100,000 Hz, as
a recording preamp. The Lehle Sunday Driver
is universally utilizable, whether operating as a
battery-powered stand-alone device, or integrated
into an existing pedal board and not just Sundays,
any other day, too...!
2
Technical data
Weight: 356 g (without Battery)
Length: 9 cm
Width: 9.2 cm
Overall height: 3.9 cm
Voltage range: 9 - 20 V AC or DC, or 9V PP3 battery
Max. power take-up: 9 mA
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: -103 dB at 1 kHz , 0 dBU (A-weighted)
Max. level: 5.7 V RMS (approx. 17 dBU)
Max. gain: 15 dB
3
General description
4
1. Input socket
Connect your instrument to this socket.
The Lehle Sunday Driver processes signals
from electric and acoustic stringed instruments,
such as electric guitars and basses, western
guitars, classical guitars and all kinds of stringed
instruments. This new, compact preamp has no
trouble balancing out low signal levels, and elimi-
nating sound losses caused by long cables and
treble pickups.
Note: In battery mode, the battery circuit is auto-
matically activated when a cable is connected to
the input socket so always ”pull the plug” when
you’ve finished your session, or are taking a
longer break!
2. S/D-selector switch
Use this switch to select the mode you want.
This gold plated-contact switch enables you to
change between the two sound modes. Mode
D for ”Driver” (switcher pressed) selects neutral
amplification, and the incoming signal is ampli-
fied at the input impedance of a guitar amp, of 1
MOhm, efficiently eliminating sound losses caused
by long cables and/or effects cascades. The signal
remains strong and clear, and retains its dynam-
ics. In mode S for ”Sunday” (switcher not pressed),
the input impedance is multiplied by four, to 4
MOhm, making previously unsuspected details
suddenly audible and imparting an unmistakable
and characteristic warmth to the sound when the
gain knob is turned up.
3. Output socket
Connect your target device here.
For instance, an amplifier, a mixer panel, a stage-
box or a soundcard.
4. External power supply
Connect a power-pack for a voltage of 9 to 20 V
here, when needed.
The Lehle Sunday Driver can be operated op-
tionally with a 9 V PP3 (”block”) battery or from an
external power supply, which should provide not
less than 9 and not more than 20 Volts. Polarity is
not important here, and both AC and DC sources
can be used. The supply voltage is internally recti-
fied, filtered, stabilized and then doubled to 18
V. A connector for the Lehle Sunday Driver’s
power-supply socket is included in the pack; if
5
desired, this connector can also be soldered on to
your power-pack mains cable.
The cover must be unscrewed and removed to
permit installation of a 9V (PP3) ”block” battery. To
do this, simply unscrew the four screws holding the
cover, and draw the cover off.
Note: The Lehle Sunday Driver automatically
switches via a gold-plated-contact relay to battery
operation if power supply voltage drops below 9
Volt. So always make sure that the Lehle Sunday
Driver has a charged battery if you want the extra
security of knowing that it will continue to operate
trouble-free even if the power supply fails.
5. Gain controller
Use the gain controller to adjust the intensity of
the preamp from a slight ”refresh sound” level up
to a powerful boost.
The gain control knob consists of black anodized
aluminium and is recessed into the housing. It
can be easily turned by placing your fingertip in
the top depression, with the great advantage that,
thanks to the recessed design, the setting cannot
be inadvertently disturbed on stage or during
transportation. The Lehle Sunday Driver with its
JFET-based circuitry performs two functions simul-
taneously, reducing signal impedance, on the one
hand, and boosting the signal, on the other.
The Lehle Sunday Driver as an impedance
converter:
When the gain controller is at the left-hand stop
(in the ”0” or ”seven o’clock” position), it operates
purely as an impedance converter. With the knob
in this position, the sound is refreshed, in order to
compensate for sound losses that can occur when
long cables or effects cascades are used.
The Lehle Sunday Driver as a booster:
A buffer starts to amplify the signal when the
gain controller is turned further in the clockwise
direction. Tube amplifiers, preamps and distortion
pedals can thus be driven slightly beyond the limit.
To make sure that the resultant overdrive distortion
sounds harmonious, the Lehle Sunday Driver
in ”S” mode amplifies less treble as “Boost” rises.
The result can range from a pleasant sound, with
no shrillness, up to a silky warm, harmonious
overdrive distortion on tube amplifiers.
6. Base and fixing
You can use the fixing screws supplied with the
6
Lehle Sunday Driver to fix it to a base plate (or
to a pedal board, for example).
Tip: in case you prefer a velcro solution for your
pedalboard we recommend to write down the
serial number of the pedal before covering it for
eventual support matters.
Thanks to its ready-to-go fixing system, the Lehle
Sunday Driver can be mounted without difficulty
on a base plate.
To do this, undo the four housing screws and de-
tach the cover. Then fix the device base to a base
plate using the two screws, the washers and the
spacers supplied. Replace the cover and tighten
the four housing screws - done!
Typical uses
The Lehle Sunday Driver’s universal proper-
ties make it equally suitable for live use on stage
and in the concert hall, and for studio recording
sessions. The following few pages show a number
of typical applications in which the Lehle Sunday
Driver is a rational addition to your gear!
7
Live
Long cable runs and complex effects cascades on
stage or in the concert hall can cause sound losses
from the signal. Where electric guitars are used
with tube amplifiers, an additional boost is often
necessary, to generate a harmonious distortion.
The Lehle Sunday Driver is designed to
perform both tasks perfectly.
The Lehle Sunday Driver as a cable driver
The use of long connecting-cable runs on stage
involves the danger of significant and audible
losses of sound quality. You can eliminate such
losses by positioning the Lehle Sunday Driver
as a cable driver in the signal path directly after
your instrument. The Lehle Sunday Driver has
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