Line Magnetic LM-216IA Plus Integrated Amplifier

The Line Magnetic LM-216IA Plus is a push-pull tube integrated amplifier that draws 2×45 watts from four KT88 tubes thanks to a revised output stage.

Why the LM-216IA Plus?

The Plus is the revised version of the LM-216IA – the same handcraft from Nanjing, but with a reworked power supply and output stage for more power reserves. If you like the sound of the original but want a bit more control into more demanding speaker loads, this is the one.

What you hear

45 watts per channel from four KT88 tubes, noticeably more headroom than the base model, the same warm basic character with point-to-point wiring and a bias control with a genuine ammeter on top.

Who is the LM-216IA Plus for? (and who it isn't)

For anyone who likes the LM-216IA but runs somewhat more powerful or lower-impedance speakers. Straight talk: stepping up to the Plus pays off above all with speakers that have a demanding impedance curve – with simple 8-ohm speakers you'll barely hear the difference.

Our verdict

More power reserves at the same price as the base model – a consistent, sensible evolution.

Technical specifications

• Circuit design: tube integrated amplifier, push-pull, Class AB
• Output power: 2× 45 W
• Tube complement: 4× KT88, 2× 12AU7, 2× 6H6P (double diode)
• Frequency response: 10 Hz – 50 kHz (-1.5 dB)
• THD: 1% (1 kHz)
• Signal-to-noise ratio: 87 dB (A-weighted)
• Input sensitivity: 340 mV
• Input impedance: 100 kΩ
• Speaker outputs: 4 Ω / 8 Ω
• Power consumption: 240 W
• Dimensions (W×H×D): 376 × 191.5 × 345 mm
• Weight: 19.6 kg

Frequently asked questions

What's the difference between the LM-216IA Plus and the LM-216IA?

The power supply and output stage are reworked, and power rises from 38 to 45 watts per channel. On the outside, the two units are practically identical.

Does the LM-216IA Plus have a headphone output?

No, for tube sound over headphones the LM-MINI 84IA from the same range is the better choice.

How many pairs of speakers can I connect?

One pair via the binding posts with a 4- or 8-ohm connection. For two pairs in parallel, we're happy to check the total impedance with you beforehand.

Does the amplifier need a break-in period?

Yes, like any tube amplifier the sound settles in over the first hours of operation – this is normal.

Why buy the LM-216IA Plus at HD Zürisee?

Since 1997 we've been guiding customers through the world of tubes and helping you find the right speakers and cables for your setup. Get in touch by phone, WhatsApp or email – we'll advise you.

Pairs well with

For the right speaker choice, it's worth taking a look at our speaker collection.