Telefunken Elektroakustik AR-70-STEREO

Multi-Pattern Stereo Tube Condenser Microphone

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The R-F-T AR-70 STEREO is an advanced stereo version of the popular AR-51 tube condenser microphone.
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List Price: $3,525.00
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The R-F-T AR-70 STEREO is an advanced stereo version of the popular AR-51 tube condenser microphone.

The AR-70 STEREO is an advanced stereo version of the popular AR-51 tube condenser microphone. It features a matched pair of large diaphragm dual sided TK51D capsules, a New Old Stock (NOS) ECC81 vacuum tube, and a matched pair of German built Haufe T14/1 output transformers that are the same transformers found in ELA M 250/251, C12 and R-F-T AR-51 microphones.

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° 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° and set to the Figure 8 polar pattern.

One of the most unique ways to use the AR-70 STEREO is in "dual mono" mode, which can lead to all kinds of interesting textures for vocals. By running the outputs into two different microphone pre-amplifiers, the user can now have one capsule set up to sound its best on quieter passages in a vocal and the other for louder passages. If the user runs about 10dB more gain on the microphone pre-amplifier for the capsule that is set up to record quiet passages, then both outputs can be recorded separately and blended later; or a compression device can be used on the pre-amplifier that is set up for the quieter passages which will net about 12-15dB of gain reduction as the singer gets louder. These two outputs can be summed and the resulting signal will maintain a relatively constant level while being automatically combined for optimal capture of the performance.

TELEFUNKEN Elektroakustik AR-70 STEREO Includes:

  • M970AR Power Supply
  • M801 25 ft. Dual-Shielded TX-7 Tube Microphone Cable
  • M701 Elastic Shock Mount
  • FC70 Locking Flight Case
  • Wooden Microphone Box

TELEFUNKEN Elektroakustik AR-70 STEREO Specifications:

  • Type: Condenser Pressure Gradient
  • Capsule: TK-51D
  • Frequency Range: 20 Hz - 20 kHz
  • Polar Patterns: Omni, Carioid and Figure 8 with 6 intermediate stages on the top, cardioid on the bottom
  • Sensitivity: 13 mV/pa +/- 0.5 dB
  • THD @ 1 kHz at 1Pa: <.2% Per Channel
  • Output Impedance: <250 ohms
  • Maximum SPL: 128dB
  • S/N Ratio: 85.5dBA
  • Self Noise: 8.5dBA (Per Channel)
  • Tube Type: GE 6201
  • Power Type: Dedicated 2-channel power supply with slow-ramping filament voltage and polar pattern selector
  • Dimensions: 12" (305mm) length  1 3/4"(44.45mm) diameter
  • Weight: 30.5oz (866g)
  • Supply Current: 1mA (120V) 250mA (6V)
  • Connected Via: XLR-7 (F), XLR-3 (M) outputx2

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