The LM 503PA mono blocks 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.
The matching LM 512CA Preamplifier is listed separately. Photo shows all matching units together.
– Single ended design
– Pure class A
– Point-to-point wiring
– High quality components
Input stage: 1x 310A
Rectifier: 1x 5U3C
Drivers: 1x 300B
Power stage: 1x 845 “Single-ended” and Class A amplifier
Output power:24W ( RMS ) single-ended Class A
Output impedance: 4Ω, 8Ω, 16Ω
Inputs: 1x RCA, 1x XLR per stage
Input sensitivity :1000 mV
Input impedance: 100 kΩ
Frequency range: 15Hz to 35 kHz, -1.5dB
Harmonic Distortion THD: 1% (1kHz)
S/N ratio: 87 dB
Vacuum Tube set: 1x 845 LM, 1x 300B FM, 1x 310A LM, 1x 5U3C
Power supply: AC, 220 V ± 5% / 50 Hz
Power consumption: 290 W per stage
Dimensions: 287×574×279mm (W×D×H)
Weight: 32 kg