Lehle Sunday Driver SW Operating instructions

Lehle Sunday Driver SW

Operating instructions

<![if ! IE]>

<![endif]>www.lehle.com

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

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
- Lehle Sunday Driver SW as a cable driver......................................................................	9
- Lehle Sunday Driver SW as a line driver.......................................................................	10
- Lehle Sunday Driver SW as a switch-in booster.............................................................	12
- Lehle Sunday Driver SW as a recording preamp...........................................................	13
- Lehle Sunday Driver SW as a recording preamp combined with the Lehle P-Split II.........	15
- Lehle Sunday Driver SW as a preamp for mixer inputs..................................................	17
Signal flow chart of the Lehle Sunday Driver SW...................................................................	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

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 Sunday 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.

2

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