Line Magnetic LM-805IA MKII Integrated Amplifier

The Line Magnetic LM-805IA MKII is a single-ended tube integrated amplifier with 805 and 300B tubes and 2×48 watts of output power.

Why the LM-805IA MKII?

Single-ended circuits with the large 805 transmitter tube are considered the pinnacle discipline of tube amplifier building. The MKII version combines it with 300B driver tubes to create one of the more elaborate amplifiers in the range – the specialist press credits Line Magnetic with a build quality "finished to an extremely high standard, period" (Christiaan Punter, HiFi-Advice, 2018).

What you hear

One review describes the 805IA's sound as "noticeably smoother right from the start" than some other models in the range (HiFi-Advice, Christiaan Punter, 2018) – a soft, punchy tone without the initial harshness tube amplifiers sometimes show.

Who is the LM-805IA MKII for? (and who it isn't)

For listeners willing to plan for weight (53.5 kg) and floor space in exchange for single-ended 805 sound. Straight talk: at 48 watts into 4/8/16 Ω, it's no powerhouse for difficult loads, but a sonic artist for efficient to medium-sensitivity speakers.

Our verdict

Elaborate single-ended technology with a rich presence, praised by the specialist press in no uncertain terms.

Technical specifications

• Circuit design: tube integrated amplifier, single-ended, Class A
• Output power: 2× 48 W
• Tube complement: 2× 805, 2× 300B, 2× 12AX7, 2× 12BH7
• Frequency response: 20 Hz – 45 kHz (-3 dB)
• THD: 1% (1 kHz)
• Signal-to-noise ratio: 87 dB (A-weighted)
• Input sensitivity: 200 mV (line) / 590 mV (Pre-In)
• Input impedance: 100 kΩ
• Speaker outputs: 4 Ω / 8 Ω / 16 Ω
• Power consumption: 490 W
• Dimensions (W×H×D): 432 × 279 × 465 mm
• Weight: 53.5 kg

Frequently asked questions

What's the difference between the MKII and the original LM-805IA?

The MKII version runs a reworked driver stage and delivers slightly more power – according to the specialist press, the sound is smoother right from the start than some of the older single-ended versions.

Does the LM-805IA MKII have a headphone output?

No, a headphone output is not documented.

How heavy is the LM-805IA MKII?

53.5 kg – plan for suitable help with transport and setup.

Does it need a lot of power when running?

Power consumption is 490 watts, typical for a single-ended unit in this class.

Why buy the LM-805IA MKII at HD Zürisee?

With a unit in this class, advice matters: we help you choose speakers, with setup and delivery on-site in the Lake Zurich region.

Pairs well with

You'll find efficient speakers in our speaker collection – get in touch for a targeted recommendation.