Telefunken AR 70 Multipattern Condenser Microphone
The R-F-T AR-70 is an advanced stereo version of our popular
AR-51 tube condenser microphone. It features a matched pair of 1" dual
sided capsules (the same capsules found in the AR-51), a New Old Stock
ECC81 vacuum tube (the same tube found in the AR-51), and a matched pair
of European made custom wound T14/1 output transformers (the same
transformers found in ELA M 250/251 and AR-51 microphones) all in a
single, easy to setup system.
The AR-70 includes one fixed cardioid capsule on the bottom, and on
top, a capsule wired for remote multi polar pattern capabilities. This
allows the mic to perform multiple stereo recording techniques, as well
as a standard single channel monophonic recording. In stereo mode the
AR-70 can be set up in 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 mic 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 pick-up pattern.
One of the most unique ways to use the R-F-T AR-70 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 quiet 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 the performance.

Each R-F-T AR-70 microphone is supplied with a flight case,
custom 7pin cable, wooden mic box, Power Supply with remote polar
pattern selector, and when registered, a 4-Year fully transferable
Limited Warranty.
| Type | Condenser
Pressure Gradient |
| Capsule | Two dual sided gold sputtered
membranes |
| Frequency Range | 20Hz / 20kHz |
| Polar Pattern | Omni, Cardioid, Figure 8 with 6
intermediate stages |
| Sensitivity | 14MV/Pa = -37dB (0dB = 1v/Pa)
-10bD |
| Impedance | 200 ohms stock |
| SPL | 138 dB |
| Non Linear Distortion | Less than or equal to
0.5% at 100 dyne / cm sq |
| Equivalent Noise | 16 dB (a-weighted) |
| Tube Type | NOS ECC81 twin triode |
| Power | Dedicated Power Supply |
| Weight | 27oz (765g) |
| Size | 9 1/2" (241mm) length x 1 3/4"
(44.45mm) diameter |
| Extras | Modern Power Supply, Shock Mount,
Wooden Box |
Manufacturing
Recreating a Legendary Microphone
"Built
to a standard, not to a price."
The manufacturing process for Telefunken
products is
complex. Our R&D efforts have led us to
the conclusions
that we should do things the old fashioned
way. We avoid
cutting corners, in favor of recreating each
piece of
the classic design. Telefunken USA utilizes
original
manufacturing processes in order to match
original manufacturer
specifications.