iSK TRM-11 Studio Vacuum Tube Microphone

The iSK TRM-11 Tube Condenser Microphone is a professional vacuum tube recording mic.

By: on 10 May 2016
I have only used the TRM-11 for a short time. I also own 2 beesneez mics as well, these are an early Arabella and a custom one that have the same capsule and electronics as the $2000 plus US ..MICS. Well the TRM-11 stands up to these mics, its more hi fi sounding, in a good way that is it has a nice top end and plenty of range thru the frequencies and its clean sounding too. Very impressive mic indeed and it looks great too. I have only one wish and that is that Swamp stocked the same valve they use in the 2B Beauty US version, so I could try it in this mic. But hey its fantastic no complaints.

By: on 15 August 2014
This microphone comes as part of a bundle which includes: a hard carry case, microphone power supply, microphone cables, shock-mount and pop-screen filter. This microphone, when paired with any good preamp, is going to sound absolutely incredible. It produces a beautiful warm vocal sound, with extreme clarity, and provides a very natural sound. When looking for any microphone, the most important thing to me is that the microphone is able to pick up my natural voice, this microphone ֠which I use primarily for vocals, and some acoustic guitar recording sessions, does this perfectly! I upgraded from a Rode NT1-A which is considered a studio standard, and I can say the word upgrade because for my style, the iSK TRM 11 microphone is able to capture a much warmer, smoother vocal performance! Here is a link to my debut single ԓecret PlaceԠwhich uses the iSK TRM 11 -

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iSK TRM11 Studio Vacuum Tube Microphone

Engineered for Excellence
The iSK team have engineered the TRM11 to be a high performance vacuum tube condenser mic with an extremely flat response, delivering pristine accuracy and vocal clarity to match it's smooth looks. Unlike budget counterparts on the market, the TRM11 incorporates high-quality WIMA capacitors and a dual-bobbin transformer coupled output. The result is gives it a slightly 'darker' sound, less susceptible to sibilance and top-end harshness.

Featuring a 34mm patented pure gold-coated dual-sided large diaphragm capsule, the TRM11 boasts high sensitivity, low noise, and a wide dynamic range. Combined with all the functionality you would expect from a great tube microphone, such as a low cut filter and attenuation pad, the TRM is suited to vocals, but can be a great sounding microphone for just about any studio situation.

Style and Sound Come Together
The first thing you notice with this mic is the space-age looking spherical capsule. The TRM11 really stands out among other microphones in looks. But that's not all. The microphone features an interchangeable housing, with white and stylish metallic blue options available to really catch the eye.

9 Selectable Pick Up Patterns
The selectable pick up patterns makes the TRM11 a very versatile tube microphone. It can be used with confidence in a wide variety of applications from studio recording and broadcasting to live performances.

Vacuum Tube
The large vacuum tube within the TRM11 preamp generates a warm low-mid tone, ideal for vocal recordings. Being highly sensitive, the TRM11 can be used to record full range sounds from greater distances. Suited for use as overhead drum kit mics, as well as recording dialogue in television and film.

Item Includes:
- 1x microphone
- 1x blue mic body
- 1x white mic body
- 1x shock mount
- 1x kit case
- 1x power supply unit
- 1x 7pin XLR cable - 7m


  • 9 Selectable Pick Up Patterns
  • Vacuum Tube (Valve Mic)
  • Low-shelf switch
  • 10dB pad
  • Large pick up range


  • Ultrathin ?34mm pure gold coated dual-sided large diaphragm capsule
  • Frequency Response: 20hz - 20khz
  • Polar Pattern: uni/bi/omni-directional
  • Sensitivity: -34dB/ +/-2dB (0dB=1V/Pa at 1khz)
  • Output Impedance: 50Ω±30% (at 1kHz)
  • Load Impedance: ≥1000Ω
  • Self Noise: 81dB/80dB/79dB
  • Max Input SPL: 135dB (at 1kHz≤1% T.H.D)
  • S/N Ratio: 81dB/80dB/79dB
  • Electrical Current: 3mA
  • Tube Model: 12Ax7

Frequency Response diagrams

Custom Label: TRM11


Shipping Weight: 6.1000