AR-51 Tube Microphone

AR-51

The large diaphragm, multi-pattern TELEFUNKEN AR-51 was created to bring the classic circuit of the ELA M 251E and C12 into a new, more affordable microphone. Featuring edge terminated TK51D capsule, a European NOS (New Old Stock) ECC81 / 12AT7 vacuum tube and newly manufactured Haufe T14/1 output transformer, the AR-51 captures the same clarity as its predecessors and provides similar sonic characteristics, with its own unique distinctions.

In use, the AR-51 is a fantastic utility microphone. Its smooth mid-range, open top end, and solid, well-balanced low frequency translation make it a great choice on anything from vocals to drums and percussion to acoustic guitar to saxophone. With 9 variable polar patterns, the AR-51 has both versatility and superior accuracy in recreating your sound source as natural as it sounds.

The AR-51 features the same amplifier electronics of the Austrian designed C12 and ELA M 251E microphones and pairs them with a dual sided, 26.5 mm large diaphragm TK51D capsule. At the core of the R-F-T AR-51 amplifier is a NOS ECC81 / 12AT7 vacuum tube, which is coupled with the same German built Haufe T14/1 output transformer found in the C12 and ELA M 251E.

The AR-51’s steel headgrille mesh and brass base ring are finished in black nickel plating, giving the microphone a unique look and vibe. The aluminum body tube is finished in a grey protective hard coat and is engraved with the microphone model name and serial number. An antique nickel plated TELEFUNKEN diamond logo badge is featured on the front of the microphone. The power supply is also finished in a black protective coating.

Each AR-51 microphone comes complete with M 901 power supply, M 801 25’ dual-shielded TX-7 tube microphone cable, M701 elastic shockmount and wooden microphone box.

Type Pressure Gradient Condenser
Capsule TK51D - 26.5 mm Edge Terminated Diaphragm
Tube Type National 12AT7WA (NOS)
Transformer Haufe T14/1
Polar Pattern 9-Pattern Variable including Omnidirectional, Cardioid and Bidirectional
Frequency Range 20 Hz - 20 kHz, ± 3 dB
Sensitivity 13 mV/Pa, ± 1 dB
THD at 1kHZ at 1Pa (Amplifier) < 0.2%
Output Impedance 250 Ω
Maximum SPL (for 1% THD) 128 dB
S/N Ratio 86 dBA
Self Noise (Amplifier) 8dBA
Dimensions 240 mm L x 46 mm Dia
Weight 769 g
Power Supply M 901 - 7 Pin Female XLR Input, 3 Pin Male XLR Output, Polar Pattern Selector
Cable M 801 - 25 ft Accusound TX-7 Cable, 7 Pin Male & Female XLR's
Wood Box WB01
Flight Case HC01 - Hard Shell Protective Case (not included), FC10S for Stereo Set