Sontronics SIGMA Active Ribbon Microphone


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MSRP: $839.00 $719.00 Save : $120.00 (14%)
Availability: Temporarily Out Of Stock - Order Now!
MSRP: $839.00 $719.00 Save : $120.00 (14%)
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  • Description
  • Specifications
  • Reviews
  • Warranty
  • More Info

The SIGMA is a fusion of modern technology and vintage style. The SIGMA’s speciality is to recreate the silky, rich tones that we heard from those old recordings, but without the ‘pops’ and ‘crackles’. Punchy low and mid frequency responses, combined with an ultra-smooth high frequency roll-off, produce a very natural image, almost making the instrument or vocal sound like it is in the room with you.

The SIGMA is phantom powered and its output is actively balanced which means, unlike most transformer-based ribbon microphones, it does not suffer from impedance mismatching problems and low output sensitivity. In fact, it is as easy to use as any other Sontronics condenser microphone – just plug it into your preamp and play! The circuit design delivers some of the lowest self-noise figures of any ribbon microphone on the market and the aluminium ribbon element itself is less than 2 microns thick, all of which goes to make a very accurate and responsive microphone.

Apart from its good looks, the unique shockmount system is extremely effective and allows the microphone to be placed close to the source with complete isolation from noise transmitted through the mic stand. The applications for SIGMA are truly varied, but Broadcast, Vocal, Acoustic and Orchestral Instruments and Drums and Percussion are a few options you should consider.


    •  Response: 20Hz - 20KHz
    •  Sensitivity: 12mV/Pa -38dB ±1dB (0dB=1V/Pa 1000Hz)
    •  Polar Pattern: Figure 8
    •  Impedance: <=150 Ohms
    •  Equivalent Noise Level: 14dB(A-weighted)
    •  Max SPL for 0.5% THD @ 1000Hz: 135dB
    •  Power Source: Phantom power 48V±4V
    •  Connector: 3pin XLR

Things You Will Get:

  • Microphone
  • Shockmount
  • Case
Series Sigma Series
Model SIGMA Active Ribbon Microphone


by PowerReviews
SontronicsSIGMA Active Ribbon Microphone

(based on 1 review)

Reviewed by 1 customer

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i wish i kept this one

By kloztar

from boyle heights

About Me Experienced

Verified Reviewer


  • Gritty
  • Unique


  • Limited Functions
  • Pricey

Best Uses

  • Acoustics guitars
  • Bu bright fem vox
  • Harmonica
  • Mandolin
  • Professional Recording

Comments about Sontronics SIGMA Active Ribbon Microphone:

i bought it from sam ash out of the glass cabinet and was very impressed with construction, weight, appearence. good looking mics allways push artists. i used it on 9 songs for the album i was working then returned it then have regreted it ever since. awesome for recording harmonicas, violins, mandolins, 2nd vox bu female vox. an average pre can run the mic, i returned to get a pair of fat head ribbons but made a big mistake. this is a good mic for specific applications.

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SIGMA Active Ribbon Microphone

Lifetime warranty on all microphones and cables. The ST-POP filter is not covered by a lifetime guarantee but is covered by a two-year replacement guarantee. However, all other terms and conditions of the lifetime guarantee apply.

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