AI-generated product photo — not official manufacturer imagery.
The Lamm LP1 Signature is a premium single-ended vacuum tube phono preamplifier designed for ultimate audio fidelity. It employs high-current pure class A operation from input to output with no loop feedback, utilizing high transconductance, super low-noise, high-current vacuum triodes in all amplification stages. It features three separate inputs: two for moving-coil (MC) cartridges and one for moving-magnet (MM), each MC input with a dedicated step-up transformer. The audibly neutral power supplies (one per channel) include full-wave vacuum rectifiers, choke-contained filters, vacuum tube high-voltage regulators, and solid-state low-voltage analog non-switching regulators for heaters. A custom-designed massive damping panel reduces mechanical vibrations for extended, coherent bass. Handcrafted with military-grade components like DALE resistors, ELECTROCUBE film capacitors, HAMMOND chokes, and gold-plated NEUTRIC connectors. It is listed under discontinued products on the manufacturer's site, with the company undergoing reorganization but planning to resume operations in early 2025.
Analog signal output specifications
Phono stage specifications
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
Estimated price (community-sourced)
Around — community and catalog average, updates slowly
Components that show up alongside the LP1 Signature in real systems. A verdict means the pair has been checked for compatibility and headroom — open it to see how the two get along.
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Tube Box DS3 B's signal-to-noise is 87 dB against the LP1 Signature's 81.5 dB, its output voltage 0.5V RMS against 0.4V RMS, and its weight 1.56 kg (3 lbs) against 18.84 kg (42 lbs). Both share mm gain (40 dB).
The Limetree Phono II's signal-to-noise is 82 dB against the LP1 Signature's 81.5 dB, its mc gain 66 dB against 70 dB, and its output voltage 0.5V RMS against 0.4V RMS. Both share mm gain (40 dB).
The KSP-7B's signal-to-noise is 100 dB against the LP1 Signature's 81.5 dB, its mc gain 60 dB against 70 dB, and its output voltage 12.0V RMS against 0.4V RMS. Both share mm gain (40 dB).
The Stealth's mc gain is 65 dB against the LP1 Signature's 70 dB, its output impedance 100Ω against 1500Ω, and its weight 8.2 kg (18 lbs) against 18.84 kg (42 lbs). Both share mm gain (40 dB).
Pro-Ject Audio Systems Tube Box DS2
The specs and the pairings above are open to everyone. Sign up and you get the system builder, the assistant, a compatibility check against the gear you already own, and a watch on this product so a price or pairing change reaches you.
Sign up free