Power amplifiers mono — Lamm Industries ML2.2

The ML2.2 is a celebrated single-ended triode monoblock power amplifier from Lamm Industries, a well-established American manufacturer known for accomplished, distinctive hybrid and tube electronics engineering, built with a substantial input impedance. The ML2.2 represents Lamm's most storied statement in monoblock power amplifier engineering.

Key specs that matter

Input sensitivity is 850mV, with input impedance at a substantial 41,000 ohms on both balanced and single-ended connections. Output impedance is a low 1.68 ohms at 6 ohms load. Output power is a modest 20W into both 8 and 4 ohms - a classic single-ended triode figure reflecting the celebrated topology's inherent power limitations. Gain is 19.97dBu. Frequency response spans 3Hz to 80,000Hz within plus-or-minus 3dB. Weight is 36.8kg, reflecting serious internal transformer engineering.

Sound and use context

Expect the exceptionally rich, harmonically textured character single-ended triode amplification is broadly celebrated for among discerning enthusiasts, with the modest 20W-per-channel output demanding notably efficient loudspeaker partners.

Pairing

The modest 20W-per-channel output pairs best with notably efficient loudspeakers - typically 95dB sensitivity or higher - to achieve satisfying dynamic headroom.

Alternatives

Lamm's own ML3 Signature offers a related flagship-tier monoblock alternative within the same broader catalogue.