2 channel mic/instrument/line tube/hybrid preamp in 19" 1U rack format
Design concept: (tube) pentode hybrid preamp, transformer input and output
2 channels: 1 Berliner’s and 1 Creamer’s channel
Switchable input impedance (for mic input only): 900Ohm, 10kOhm, 2.4kOhm
Instrument (DI) input impedance: 3.9MOhm (Berliner side) and 2.2MOhm (Creamer side)
Output mode: Transformer or solid state balanced driver
Low/high frequency shelving boost, corner frequency varies (see manuals)
Frequency response: 10Hz-50kHz +/- 3dB
Maximum gain: 76dB/50dB (mic/instrument), Berliner side; 74dB/48db (mic/instrument), Creamer side
Gain control range (Berliner side only): 36.7dB (for mic input, Pad switch adds another 10dB)
Harmonic distortion: <1% before clipping level (Berliner), <2% (Creamer), quickly decreases if driven less.
Maximum output level: 32dBu
Minimum output load: 600Ohm
Connectors: XLR mic and output, balanced only
Instrument input: 1/4” unbalanced, mono
Power consumption: 40W
All supply voltages regulated (including heater)
285V Plate voltage for huge headroom
Gold plated printed circuit boards with a double copper layer.
Gold plated tube sockets
The Beamer can be ordered with Ni-Fe alloy or pure Steel output transformers:
Beamer A: 2 Ni-Fe alloy core output transformers
Beamer B: 2 pure Steel core output transformers (the choice of most people)
Beamer AB: Ch1 with Ni-Fe transformer, Ch2 with pure Steel.
Please specify mains voltage when ordering: 115VAC or 220-240VAC.