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Advanced Audio CM800T Tube Condenser Microphone

Large diaphragm, three-pattern tube condenser microphone modeled after the C800G featuring a 32mm double-diaphragm K67-type capsule and Class A single stage tube circuit

Product Description

The Advanced Audio CM800T is a large diaphragm, 3-pattern tube condenser microphone producing the presence lift heard from the original C800G - favorite of many hip hop and rap artists. The capsule is a double-sided, dual back-plate 32mm K67 type capsule with a HF rise similar to the original capsule utilized in the C800G. The circuit is designed around a military spec'd GE/JAN 5654W tube which is configured the same way as the C800G circuit that used a 6AU6a tube.

The 6AU6a tube was first used in mantle radios sold in the early 60s. The 5654W is of a higher quality and features a more consistent build than the "pedestrian" 6AU6a. The 5654w tube also generates less heat than the 6AU6a, so no cooling device is required.

The combination of the K67 capsule response coupled to a pentode tube configured as a triode with no de-emphasis; provides the bright and articulate sound of the C800g.

A -10 dB pad can be used for close miking of drums, percussion and instrument amps. This gives the CM800T >6 dB more headroom than the C800G. A 100 Hz switchable rumble (HP filter) is accessible at the rear of the microphone.

Advanced Audio were also able to add a Figure 8 polar pattern option which the C800G does not have, while still keeping the passive cardioid.


  • 32mm double-diaphragm K67-type capsule
  • Selectable omni, cardioid and figure-eight pickup patterns
  • Class “A” single stage tube circuit coupled to a high quality dual bobbin transformer featuring bi-metal laminations that can handle the presence rise of K67 style capsule.
  • 100 Hz switchable roll-off (rumble filter)
  • Switched -10 dB pad
  • Noise: <14 db (A-weighted)
  • Distortion: <1% @ 128 dB without pad and 138 dB with pad
  • Output: >10 dBu with <0.5% distortion 20 Hz - 20 kHz
  • Robust shock-mount
  • Aluminum road case, regulated power supply and 7 pin gold plated Neutrik cable

Product Specifications

Condition New
Package Contents C800T mic, shock mount, regulated power supply, 7-pin gold-plated Neutrik cable, and aluminum road case
Tube or Solid State Tube
Transducer Type Condenser
Polar Pattern Bi-Directional / Figure-Eight, Cardioid, Omni-Directional
Number of Microphones Single Microphone
Impedance <200 Ohms (load impedance <1.2 kOhms)
Frequency Range 20 Hz - 20 kHz
input_pad -10 dB
Filters 100 Hz roll-off

Product Reviews

5 out of 5 stars.
Review Count (1)

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I bought this mic after hearing a blind shootout on gearslutz with a C800G and the Golden Age replica. In my opinion, the CM800T was clearly head and shoulders above both. I purchased it immediately and it gets used on vocals over my U87 and C12 clone. I can’t say enough good things about this mic. At this price point, it can’t be beat for that modern vocal sound.

By Chris on January 24, 2021

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I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
Matthew R.
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In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
Phil T.
The speed of delivery exceeded my expectations! I was VERY pleased that my shipment arrived in time for a scheduled vocal tracking session. The packing insured that my order arrived safely. And the sales staff responded quickly to questions regarding the product.
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