Lehle Sunday Driver II specifications

• 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 circuit of Lehle Sunday Driver II

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.

Technical datas

Weight 325 g

Length 3.55“

Width 3.6“

Overall height 1.45“

Supply voltage 9-15 V DC

Current consumption 110mA

Max input level (with power supply) +20dBu

Max output level (with power supply) +22dBu

Level noise floor -110 dBu (20 Hz - 20 kHz)

Total harmonic distortion 0.008 % (0 dBu, 1 kHz)

Frequency range 20 Hz – 100 kHz

Input impedance D-mode 1 MΩ

Input impedance S-mode 5 MΩ

Output impedance 220 Ω

Max gain 18dB