Line Magnetic LM-33LP Tube Phono Preamplifier

The Line Magnetic LM-33LP is a tube phono preamplifier for MM and MC cartridges with three ECC803S tubes.

Why the LM-33LP?

A completely separate power supply chassis keeps hum and interference away from the sensitive phono signal. German coupling capacitors and Japanese Nichicon and Rubycon filter capacitors handle the fine work in the signal path – a level of component effort you don't find everywhere in an external phono stage at this price point.

What you hear

A typically warm tube phono sound with a tangible sense of space. A switch lets you adapt the preamp to high- or low-output cartridges, instead of settling for a single fixed gain factor.

Who is the LM-33LP for? (and who it isn't)

For turntable fans looking for an external phono stage instead of the built-in solution in their amplifier. Straight talk: without a turntable and a matching cartridge, even the best phono stage won't get you anywhere – feel free to talk to us about choosing a system.

Our verdict

A serious external phono stage with tube technology at a fair price.

Technical specifications

• Inputs: MM/MC, switchable high/low output
• Tube complement: 3× ECC803S (gain), 1× 6Z4 (rectifier in the power supply)
• Design: two-piece, separate power supply chassis
• Colour: black
• Connections: RCA input and output on the preamp chassis

Note: exact figures for gain factor, input impedance/capacitance, dimensions and weight are not publicly documented by the manufacturer – we'll add them once they're available from the distributor.

Frequently asked questions

Does the LM-33LP suit MC cartridges?

Yes, the high/low output switch lets it adapt to MC cartridges of different sensitivities, as well as to MM cartridges.

Does the phono stage need a break-in period?

Yes, as is usual with tube equipment, the sound settles in over the first hours of operation.

Does the LM-33LP come in one or two chassis?

In two chassis – the preamp and power supply are separated for better noise rejection.

What colours are available?

The manufacturer offers black and silver; we carry the black version.

Why buy the LM-33LP at HD Zürisee?

We advise you on the right combination of cartridge, turntable and phono stage – drawing on years of experience in our own shop.

Pairs well with

Take a look at our turntable collection and our cartridges for the right combination.