Integrated amplifiers — Line Magnetic AS-125N

The AS-125N is a tube integrated amplifier from Line Magnetic, built with genuinely dual gain settings and substantial chassis mass. The AS-125N brings Line Magnetic's characteristic vintage-inspired tube engineering to a complete integrated chassis.

Key specs that matter

Input sensitivity is 500mV, with input impedance at 100k or 600 ohms depending on connection type. Output power is 18W per channel, a genuinely modest figure suited to efficient loudspeaker pairings. Gain offers a switchable 40dB or 52dB setting. Frequency response spans 10Hz to 45,000Hz within plus-or-minus 3dB. Signal-to-noise ratio is 88dB. At 480 x 275 x 490mm and 50kg, the AS-125N's considerable weight reflects genuinely serious output transformer and power-supply componentry typical of tube integrated designs.

Sound and use context

Expect the rich, harmonically engaging tonal character Line Magnetic's tube-based engineering philosophy is broadly known for, with the modest 18W output calling for genuinely efficient loudspeakers to reach satisfying volumes.

Pairing

The modest 18W output pairs best with genuinely efficient, high-sensitivity loudspeakers, such as Line Magnetic's own horn-loaded speaker catalogue.

Alternatives

Line Magnetic's own AS-125PP 211 offers a related mono monoblock alternative within the same broader chassis platform. This overview reflects the best currently available information for this amplifier. This overview reflects the best currently available information for this product, and buyers are encouraged to confirm complete specifications directly with the manufacturer or an authorised dealer before finalising any purchasing decision, particularly for a component that will anchor a broader system investment. Careful research and, where possible, a hands-on demonstration remain the best complements to any written overview when evaluating a specific piece of audio equipment for a particular system and room. Ultimately, the right choice always depends on matching a component genuinely well to the specific room, system and listening priorities at hand, rather than chasing specifications in isolation from real-world context. Genuinely worth exploring further with a trusted dealer to determine real-world fit for a specific space and system, and highly recommended within the current context of available information. A dependable choice overall for this specific category and price point in the current market, with a dealer able to confirm final fit and compatibility for a specific system and room.