Lehle Sunday Driver II Preamp, Buffer, Booster & DI Box

The Lehle Sunday Driver II is a high–end preamp, buffer, booster and DI box built around a discrete Class A JFET circuit with studio–grade 130 dB dynamic range. A gold–plated mode selector switch toggles between two operational modes: 'D' for Driver mode amplifies the guitar signal with no colouration at guitar–amp input impedance, maintaining full dynamics while eliminating signal loss across cables and pedals. 'S' mode multiplies input impedance by five, revealing previously hidden detail and adding the characteristic warmth that gives this preamp its name – mellow and musical as a Sunday afternoon.

Maximum gain reaches +18 dB with zero background noise, achieved by rectifying, filtering and stabilising input voltage to 30 V from the power supply socket to fully exploit tube amplifier dynamics. The balanced output functions as a professional DI box and accepts phantom power for flexible stage and studio use. Frequency response spans 20 Hz to 100,000 Hz, delivering extended bandwidth far beyond standard audio range. The compact enclosure houses gold–plated contacts throughout the signal path, ensuring reliability whether used as a cable driver for large venues, a recording preamp, or within complex pedalboard signal chains.

Features

• Discrete Class A JFET preamp circuit with 130 dB dynamic range
• 30 V internal voltage rail for maximum headroom and tube amp compatibility
• Dual mode operation: Driver buffer and Sunday preamp with 5x impedance
• Boost range up to +18 dB with zero background noise or distortion
• Frequency response from 20 Hz to 100,000 Hz for extended bandwidth
• Balanced output with phantom power capability for DI box operation
• Gold–plated mode selector switch and signal path contacts throughout
• Compact format houses studio–standard preamp and buffer in single pedal