Lehle Sunday Driver Operating instructions

Lehle Sunday Driver

Operating instructions

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

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: [e-mail]

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 instruments. 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, compactformat 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 effects 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 suddenly 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