Descripción
The AR-70 is an advanced stereo version of the popular AR-51 tube condenser microphone, capable of X/Y, Mid-Side and dual mono recording configurations.
Microphone Design
The AR-70 Stereo includes one fixed cardioid capsule on the bottom, and on top, a capsule wired for remote multi-polar pattern capabilities. This allows the microphone to perform multiple stereo recording techniques, as well as a standard single channel monophonic recording, all in one package. In stereo mode, the AR-70 Stereo can be set up in a standard X/Y configuration, with each capsule orientated 90 degrees away from each other, resulting in a perfectly co-incidental pair. With the option of the multi-pattern functionality of the top capsule, the microphone can also be used in Mid-Side (M/S) technique, where the lower capsule is fixed in cardioid, and the upper capsule is rotated 90 degrees and set to the Figure 8 polar pattern.
Construction
The AR-70 Stereo’s rotating steel headgrille mesh and brass base ring are finished in 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 grey protective coating.
Technical Specifications
Type Stereo Pressure Gradient Condenser
Capsule TK51D – 26.5 mm Edge Terminated Diaphragm
Tube Type NOS 12AT7WA
Transformer Haufe T14/1
Polar Pattern Top Capsule – 9-Pattern Variable including Omnidirectional, Cardioid, Bidirectional
Bottom Capsule – Cardioid
Frequency Range 20 Hz – 20 kHz, ± 3 dB
Sensitivity 13 mV/Pa ± 1 dB
THD at 1kHZ at 1Pa (Amplifier) < 0.2% (Per Channel)
Output Impedance 250 Ω
Maximum SPL (for 1% THD) 128 dB
S/N Ratio 85.5 dBA
Self Noise (Amplifier) 8.5 dBA (Per Channel)
Dimensions 305 mm L x 46 mm Dia
Weight 866 g
Current Draw from Mains 95 mA
Power Supply M 970AR – 7 Pin Female XLR Input, Two 3 Pin Male XLR Outputs, Polar Pattern Selector
Cable M 801 – 25 ft Accusound TX-7 Cable, 7 Pin Male & Female XLR’s
Wooden Box WB70AR
Flight Case FC70 – Vintage Style Locking Combination Flight Case
