Questions? Call Us:

Audio Engineering Assoc A840
Active Studio Ribbon Microphone

OUR PART #:  A840

With the A840, AEA introduces the active version of its award-winning R84 microphone.
Learn More
Our Price: $1,553.00
List Price: $1,725.00
You save 10%!
Write the first review.

Full Compass offers free ground shipping on thousands of stock and non-stock (special order) items for orders placed on this web site and shipping in the continental US (48 states).

Learn More

Free Shipping


We guarantee to match pricing on the products we sell for new, identical and immediately available products if you see them offered at a lower price. Please contact us if you find a lower price before purchasing.

Learn More

Low Price


Audio Engineering Assoc A840
Usually ships in 7-14 business days.
Need it sooner? Call us!

Similar Products

With the A840, AEA introduces the active version of its award-winning R84 microphone. The A840 flatters strings, woodwinds, drums, piano, voice, and much more with the ease and grace that only a Big Ribbon mic can deliver.

Now with phantom power, you now have a lot more flexibility in your choice of preamps because you no longer require the quiet gain that passive ribbons need so much of. The A840 also shares many of the characteristics of its granddaddy, the A440, but is much more economically priced. Because the A840 shares the same Big Ribbon as the rest of AEA's product line you'll achieve a sound with the A840 that is smooth, natural and free of any of the uncomfortable resonances that shorter ribbons and condensers can exhibit. The result is a sound that many engineers say sounds astonishly close to what your ear hears when you're actually standing in the studio because the R84 doesn't color the sound with a lot of its own characteristics. Because the A840 has significantly less proximity effect than the A440, the A840 makes an excellent spot mic as it is optimized to be positioned within 12" of the sound source without bass distortion.

The A840 makes all of this available in a single package: the signal strength and flexibility of active electronics combined with the luxurious warmth of a Big Ribbon all wrapped up in a much more affordable package. No studio is complete without a pair of A840's.

The microphone package includes a three meter cloth covered Accusound and an AEA vertical case for proper shipping and storage.


  • High output
  • Compatibility with any preamp and input impedance
  • Low self noise of 17.5 dB(A)
  • Fast, accurate transient reproduction
  • High SPL capability of 141dB
  • Single-diaphragm with well-controlled, native figure-8 polar pattern
  • Wide-band response from below 20Hz to beyond 20kHz


  • Operating Principle: Velocity microphone
  • Frequency Response: 20Hz to 20kHz
  • Powering: P48 phantom power, 7mA
  • Maximum SPL: 141 dB SPL with a 1kohm load for <1% THD
  • Output Sensitivity: -44dB V/Pa 1Pa=94dB SPL
  • Output Impedance: 92 ohms broadband
  • Recommended Load: 1.0kohm or greater
  • Polarity: Pin 2 high for positive pressure on front of microphone
  • Connector: XLR-3M wired to a captive 3 meter Accusound cable
  • Polar Pattern: Native bi-directional pattern
    Horizontal: Level changes with angle, frequency response is consistent, -35dB null at 90°/270°
    Vertical: Level changes with angle, reduced HF response above and below 0°/180° axis, -35dB null at 90°/270°
  • Transducer Element
    Ribbon Thickness: 1.8µ (0.0000018m) of pure aluminum
    Ribbon Width: 4.7mm
    Ribbon Length: 59.7mm
  • Accessories Included:
    Custom vertical storage & transport case
    Captive three meter, cloth covered, Accusound audiophile cable
  • Limited Warranty: One year parts and labor, shipping not included
  • Mic Dimensions: 11.6" x 3.9" x 2.5"
  • Mic Weight: 1.875 lbs with 3m Accusound cable
  • Case Dimensions: 16" x 7" x 6.4"
  • Weight: 3.7 lbs with mic & cable in case

To be the first to review this item, click here.

Add to Cart

We're sorry, only of this item available

Call a Sales Pro at 800-356-5844 for more information

© 2017 Full Compass Systems, LTD  9770 Silicon Prairie Parkway, Madison, WI 53593  All rights reserved.

We are not responsible for typographical errors in pricing or product specification
inaccuracies in our catalog or web site. Prices are subject to change without notice.