Order code: 1029
Gold-plated Switches
The signal from the pickups of an electric guitar or bass is so weak that poor-quality cables, cold joints and cheap contact materials ruin your sound. Switch contacts need to be made of special materials to permit loss-free switching of these low-level signals. All Lehle switchers feature special relays and slide switches with gold-plated contacts for totally reliable, absolutely zero-loss switching.
Voltage Internally Boosted to 30V
To exploit the dynamics of tube amplifiers to the full, the input voltage of Lehle products bearing this symbol is rectified from the power supply socket, then filtered, stabilized and boosted to 30V.
Adjustable Gain
Adjustment of volume or distortion using a gain controller is a vital feature in many situations. The gain controllers on the corresponding Lehle products feature black anodized aluminium knobs set back into the housing so that they can be easily fingertip rotated but keep their settings during performances and transportation.
Balanced Output
Equipped with a standard TRS-socket for balanced output signals if needed.
  • High-end preamp, buffer and booster
  • Discrete Class-A input stage
  • 130 dB dynamic range thanks to 30 V technology
  • Select between Buffer and Booster modes
  • Neutral, studio quality sound
  • Boost up to +18 dB
  • Balanced Output can be used as a DI-box, with phantom power

The LEHLE SUNDAY DRIVER II is a high-end preamp and DI box all in a conveniently compact format.
Its circuit is based on a discrete Class A circuit with JFET technology and provides two modes of operation, selected by a mode selector switch with gold-plated contacts: "D" stands for Driver: in this mode, your guitar signal is amplified, with absolutely no modification, at the input impedance of a guitar amp, efficiently eliminating losses on the route through leads and effects; the signal remains strong and clear, retaining its full dynamics.
The second setting "S" - as in Sunday - multiplies the input impedance by five, bringing out previously inaudible details and, as gain increases, giving your guitar a characteristic and unmistakable warmth that has given this preamp its name - the result is a sound as mellow as a sunny Sunday afternoon.
Even at the maximum +18 dB gain setting, the LEHLE SUNDAY DRIVER II always stays clean and absolutely free of background noise, thanks to its studio-standard overall dynamic range of 130 dB. 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 transformed to 30 V.
You can use it as a DI box on stage or as a high-end preamp in the studio as well: the output of the LEHLE SUNDAY DRIVER II can be tapped in balanced and the pedal be powered via phantom power.
Whether as a cable driver for stadium gigs, in complex effects setups, or as a recording preamp - with its broad output range of 20 to 100,000 Hz, the LEHLE SUNDAY DRIVER II can be used anywhere. And not just on Sundays.

Q: What is the effect of an impedance converter?
A: The sound will be freshened up and signal loss through long cable runs will be compensated.
Q: What is the benefit of a buffer/impedance converter before my effects chain? I heard about the SUNDAY DRIVER, but I am uncertain how this works and whether I need this for my pedal board.
A: A high impedance / HiZ signal can be weakened by an increasing number of FX pedals, even true bypass effects. The difference can be felt by connecting your instrument with a short cable directly to your amplifier and focus on the details in sound and dynamics.
Q: How can I compensate the signal loss on my effects board?
A: By using an impedance converter, which provides a high impedance input socket for the instrument signal and a low impedance output signal that is more resistent against loss.
Q: My doublebass pickup delivers a weak signal, can I increase the level without any coloration or distortion?
A: The SUNDAY DRIVER II can increase the signal gain up to 18dB without any loss or alteration of your original signal.
Weight 325 g
Length 90 mm / 3.5"
Width 92 mm / 3.6"
Overall height 37 mm / 1.5"
Supply voltage 9 - 15 V DC or phantom power
Current consumption 110 mA
Frequency range 20 Hz - 100 kHz (+/- 0.2 dB)
Total harmonic distortion 0.008 % (0 dBu, 1 kHz)
Input impedance D-mode 1 MΩ
Input impedance S-mode 5 MΩ
Max input level 7.7 V RMS / 20 dBu
Max output level 9.8 V RMS / 22 dBu
Max. gain 18 dB
Level noise floor -110 dBu (20 Hz - 20 kHz)
Gitarre & Bass 2020.02
Dirk Groll
This is really high end!
In the listening test, both devices fully deliver on all promises, scoring with the highest quality technology, practical features and the extremely clean sound transmission. This is really high end!
Bonedo 2019.12
Thomas Dill
Sophisticated switching circuits.
The pedals are made with high-quality components and sophisticated switching circuits, which certainly contributes to a stable guitar signal even in a long signal chain.
Bass Quarterly 2019.11
Alexander Kern
Extra headroom!
Once you've experienced this level of extra headroom, you’ll never want to play without it. Both the clean bass & effected signals sound noticeably fuller and multidimensional; with more detail, warmth, colour and balance.

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I have the following questions on the product LEHLE SUNDAY DRIVER II (Order code: 1029)
Joachim Joki Schaller
Tel +49 2855 850070