LINE MAGNETIC LM-503 PA , de superieure mono buizen eindversterkers van LINE MAGNETIC

De beroemde WESTERN ELECTRIC 310A buis heeft een tweede leven gekregen in een perfecte copie van het origineel.

De combinatie  310A, 300B en 845 is onovertroffen!

These monoblock power amplifiers practically are the split of famous LM-219IA's power amp section into single channel units, also build-up on famous Western Electric 310A vacuum tube revitalized by LM as base of  perfect classical Western Electric tube combination 310/300B/845, in single-ended circuitry, hand-built with extreme attention to detail,  fully point-to-point wired, with highest quality components, in perfect  first-rate craftsmanship, put into solid and rigid enclosures and full of technical finesse.

All of this sophisticated traditional technology has only one target, the play-back of any sound source feed to it in a fantastic natural sound, build-up finest, mind-benders of amplifier, regarding power, finesse, bass response, inner resolution, clean treble. these amps do it all, really extremely well - combined with matching speakers play-back in the real sense of High-end HiFi, being pure, smooth and natural as the original for various types of music appreciation, re-broadcasting the charm of music, the singer's feelings as well as classic musical sense and so on, letting  people concentrate on music only with all what is in and nothing else. In this sense the amps really are monsters.

This result beside others is reached with the following feature highlights:

  • Re-Vitalization of famous Western Electric 310A vacuum tube as base of  perfect classical Western Electric tube combination 310A/300B/845

  • Single-Ended design

  • Mono block design

  • Point to point wiring throughout

  • Inputs selectable, 1x RCA, 1x XLR

  • High quality power transformer specifically developed for this machines

  • Special processed EI type  broadband output transformer

  • Tube 310A based on Western Electric design, re-developed by LM especial for this amp

  • 845 Class A single-ended tube for  power amplification

  • Speaker outputs 4, 8, and 16 Ω

  • High-end dual analog output level meter in each monoblock

  • External BIAS adjustment via built in meters

  • BIAS Fine Adjustment individual for each Tube in Final Stage

  • Peripheral push tube and power tube current tuning knob with current display

  • Finest capacitors, resistors, signal cables and so on available

  • Perfect  installation of wires and cables

  • High power-on and mute delay function of approx. 30 seconds

  • Detachable tube protection cage

  • Heavy-duty and rigid enclosure



Output power:

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Input sensitivity:

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24W ( RMS ) single-ended Class A per stage

4Ω, 8Ω, 16Ω

1x RCA, 1x XLR per stage

1000 mV

100 kΩ

15Hz to 35 kHz, -1.5dB

1% (1kHz)

87 dB

1x 845 LM, 1x 300B FM, 1x 310A LM, 1x 5U3C

AC, 220 V ± 5% / 50 Hz, other voltages please ask

290 W per stage

0 to 40°C, Humidity 20 to 80%

-20 to 70°C, Humidity 20 to 90%

287×574×279mm (W×D×H)

32 kg per stage


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