Search Microphones

Share This Page

TNC Audio ACM-3

Pricing & Availability

  • MSRP: n/a


Reviews & News

ACM-3 Documentation

BidirectionalTNC Audio ACM-3

Bidirectional Ribbon Microphone

The ACM-3 is a passive ribbon microphone modeled externally after the Royer R-121 (although built with much simpler parts). It is manufactured in China by the Shanghai Silver Flute Sound Company; see their RM3.

Despite the radically different headbasket shapes, the ACM-3 and ACM-2 are the same microphone underneath. Both utilize a 2-micron, 45mm aluminum ribbon suspended between Neodymium magnets.

The headbasket is lined with a very fine-mesh screen. A second layer of blast protection (or third, if you count the slotted case) is mounted to the ribbon motor, as in the ACM-2.

The mic ships in a padded wooden case with a low-quality plastic mic clip that sheds flashing when the mic is inserted.

The TNC Audio ACM-3 is also known as: ACM3.

The mic was released in 2008.


Frequency Response - BidirectionalClick Graph to Compare!
ACM-3 Bidirectional Frequency Response Chart
Pickup Patterns Pads & Filters
Bidirectional (2.2 mV/Pa; 30 - 18,000 Hz)
Ribbon Construction Impedance SPL/Noise
200 Ohms (Low) Max SPL: 137 dB
Weight Length Max Diameter Interface(s)
n/a 159mm (6.26'') 24mm (0.94'')
  • 3-pin XLR male (1)
Power Specifications

Did we get anything wrong on this page? Please let us know!