Set Amplifiers

  • Line Magnetic LM-212PA

    Line Magnetic LM-212PA

    Mono Power Amplifier

    The LM-212PA mono power amplifier is Line Magnetic’s flagship, using a massive 212 tube in a single ended design and complete with an ingenious lifting/retracting function that protects the tube for accidental damage when not in use.

    The input stage tube is a 310A, specially manufactured for and by Line Magnetic. Rectification is performed by a 274B and a 300B works as the driver tube.

    Nothing but top grade components are used in the LM-212PA mono power amplifier, such as American RTX Multicap capacitors, Danish Jensen capacitors, German Mundorf MCap capacitors, NCC capacitors, Nichicon capacitors, Kiwame capacitors, a Motorola high current rectifier bridge and Panasonic relays.

    Bias for the 212 tube is easily adjusted using the top mounted ampere meter. The 300B driver bias is controlled by an auto-bias circuit and does not need to be adjusted.

    Some Highlights
    – Single-ended design
    – Class A amplifier
    – Point-to-point wiring
    – High quality components

    Tubes used in this amplifier
    Input stage: 1x 310A
    Driver: 1x 300B
    Rectifier: 1x 274B
    Power stage: 1x 212

    Features
    Hand-made construction with the finest point-to-point wiring
    SoftStart and time-delay circuit – 30 seconds
    Specially designed EI transformers for power supply and output
    212 tube protection mechanism

    Tubes supplied Common replacements
    300B 300A, 4300B
    310A Soviet Union/om12C, WE310A
    274B 5R4GY, 5X4G
    212 ML-212E

    Specifications
    Class A amplifier – 1x32W
    THD: 1% (1kHz)
    Signal/Noise ratio: 87dB
    Frequency response: 15-35,000 Hz (-1.5 dB)
    Sensitivity: 1000 mV
    Input Impedance: 100KΩ (RCA), 600Ω (XLR)
    Load impedance: 4/8/16Ω

    Connectors
    2x Line input RCA
    1x Line input XLR
    1x Screw terminals compatible with banana plugs

    Dimensions: W 300 x H 600 x D 575 mm
    Weight: 60 Kg
    Finish: Silver

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  • Line Magnetic LM-503PA

    Line Magnetic LM-503PA

    DUAL Mono-block Audio Power Amplifier

    The LM-503PA mono blocs has been created from an original design of Western Electric. It uses a single ended 845 output stage with Full Music 300B drivers. Pre-amplifier stage use a special Line Magnetic tube, the 310A.

    The rectifier tube is a 5U3C and the power line is filtered by two special chokes. User bias controls for 300B and 845 are used for bias adjustment with a specific vu meter to allow you to monitor bias with ease.

    Features:

    Point to point hand soldering circuit, the whole machine adopts single copper soldering.
    Using high-grade special craft and high quality wide range of EI type single-ended output transformer.
    Use 1 high-power Toroidal power transformer per channel.
    Preamp stage using the company design and development of 310A vacuum tubes, promote use 300B level.
    Power stage using one 845 vacuum tubes do class A single-ended power amplifier.
    Power tube current tuning knob and current display meter.
    The input has sound balance transformer input and RCA input selection.
    High voltage delay when turn on.
    Set up big negative feedback loop and small loop negative feedback, to adapt to the different requirements of listening.
    Convenient installation drawing plug-in valve cage cover.
    Voice is soft, pure and smooth, suitable for appreciation of various types of music.

    Specification:
    Power output: 24W +24W(Single-ended class a working condition)
    THD: 1%(1kHZ)
    Frequency response: 15 hz ~ 35 kHZ (1.5 dB)
    S/N Ratio: 87db
    Input Impedance: 100kΩ
    Output Impedance: 4 Ω, 8 Ω, 16 Ω
    Input Sensitivity: 1000 mV
    Vacuum Tube: (310A x 1, 300B x 1, 845 x 1, 5U3C x 1) * 2
    Power supply: AC 220V (+-5%) (50Hz)
    Power Consumption: 290w
    Working conditions: temperature: 0 ℃ to 40 ℃ Moisture: 20% ~ 80%
    Storage conditions: temperature: – 20 ℃ ~ 70 ℃ Moisture: 20% ~ 90%

    TUBES
    Input stage: 1x 310A
    Rectifier: 1x 5U3C
    Drivers: 1x 300B
    Power stage: 1x 845 “Single-ended” and Class A amplifier

    Bias control is accessible on top of the amplifier panel with true ampere meter.
    Selector NFB min/max
    Analog inputs: 1x XLR et 1 RCA
    Load impedance for HP to connect: 4/8/16ΩS
    SoftStart and time-delay circuit. (30 seconds)
    Two EI output transformers with wide bandwidth are applied

    Metal and removable tube guard cage

    Dimension: W 287 x D 574 x H 279) mm x 2
    Net Weight: 32kg x 2 = 64kg
    Gross Weight: 34kg x 2 = 68kg

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  • Line Magnetic LM-513PA

    Line Magnetic LM-513PA

    Dual Mono-Block Power Amplifier Pair

    === DISCONTINUED ===

    The mono amplifier LM-513PA is a Push Pull amplifier with 4x 845 tubes in pure Class A amplification and delivers 1x160W. The use of high-quality components (Multicap, Philips BC filter, Motorola…) hand-made with the finest point-to-point wiring the most part is the guarantee of exemplary reliability.

    Two pieces of Toroid power transformers with high power output are used for better power control and allocation.

    Specification:
    Power output: 160W (MAX)
    THD: 1% (1kHZ)
    Frequency response: 15 hz ~ 35 kHZ (-1.5 dB)
    S/N Ratio: 87 db
    Input Impedance: 100 k Ω (RCA) 600 (Balance)
    Output impedance: 4 Ω, 8 Ω, 16 Ω
    Input Sensitivity: 1000 mV
    Tube:12AX7x1、310Ax1、300B x1、845 x 4
    Power Consumption: 600 w

    Dimensions & Weight
    PRODUCT                              W 447 x H 347 x D 497 mm / 74 Kg
    PACKAGING                             W 610 x H 490 x D 580 mm / 80 Kg
    Net weight: 80kgx2 = 160KG

    Power supply voltage: ～220V±5%（50Hz）
    Working conditions: temperature: 0 ℃ to 40 ℃ Moisture: 20% ~ 80%
    Storage conditions: temperature: – 20 ℃ ~ 70 ℃ Moisture: 20% ~ 90%

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