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9 polar patternsBlackspade Acoustics UM17R

Multi-Pattern Tube Condenser Microphone

The UM17R is a multipattern tube condenser microphone made in the US by AMI. It is the premium edition of the company’s UM17, and differs from the UM17 in the following ways:

  • The Blackspade K17 capsule in the UM17 is swapped for a Thiersch M7, a Mylar-diaphragmmed M7 capsule made in Germany.
  • The Chinese shockmount is swapped for a custom-made Rycote shockmount.
  • The imported power supply from the UM17 is swapped for a supply designed and manufactured in the US by AMI. The UM17R will likely have a 9-pattern switch (rather than 11, as on the UM17).
  • The cable is upgraded to Gotham GAC-7, with Switchcraft connectors.

Like the UM17, the UM17R employs an amplifier circuit and transformer designed by AMI.

The transformer is a BV8LP, a smaller version of the BV8 transformer used in the Neumann U47.

The tube is a NOS EF732/5840, made by either Telefunken or Sylvania.

The UM17R ships with a Rycote shockmount, a power supply, Gotham cable, and a flight case. It is covered by a 5-year warranty.

Permalink: Blackspade Acoustics UM17R

The mic was released in 2011.


Pickup Patterns Pads & Filters
Omnidirectional (14 mV/Pa; 20 - 20,000 Hz)
Cardioid (14 mV/Pa; 20 - 20,000 Hz)
Bidirectional (14 mV/Pa; 20 - 20,000 Hz)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 25mm
Capsule diameter: 32mm
200 Ohms (Low) Max SPL: 132 dB
Self-noise: 17.0 dB(A)
Weight Length Max Diameter Interface(s)
775g (27.34oz) 245mm (9.65'') 44mm (1.73'')
  • 3-pin XLR male (1)
Power Specifications
  • Includes tube power supply

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