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BidirectionalSontronics Delta

Bidirectional Active Ribbon Microphone

The Sontronics Delta is a 48V Phantom-powered ribbon microphone designed primarily for live sound use.

The Delta is closely related to the Sontronics Sigma, with major differences including a wider body shape, added protection around the ribbon assembly, and more colored frequency response. Like many ribbon mics, the Delta has a smooth high frequency rolloff. The Delta also features a noticeable rolloff of low frequencies beginning around 100 Hz as well as a slight bump at 2 kHz.

Sontronics markets the Delta as an ideal choice for electric guitar amplifiers. Reviewers tend to agree, finding the Delta provides a nice alternative to the more traditional dynamic mics often used for guitar amps.

MusicRadar, 2009

…like all ribbon mics it’s not what you’d consider an all-rounder, so it should be purchased to complement the condensers and dynamics in your mic collection rather than replace them.

SoundOnSound, 2010-04

I found myself favoring the Delta on the gentler clean sounds, but the C414 [B-ULS] on the distorted high-gain Soldano [guitar amp]… I’d think that anyone going for a more classic rock sound would find the Delta to deliver admirably.

The Delta ships in a padded aluminum flightcase and comes with the same unique shockmount included with the Sontronics Sigma.

Permalink: Sontronics Delta

The mic was released in 2009.


Frequency Response - BidirectionalClick Graph to Compare!
Delta Bidirectional Frequency Response Chart
Pickup Patterns Pads & Filters
Bidirectional (11 mV/Pa; 20 - 15,000)
Ribbon Construction Impedance SPL/Noise
150 Ohms (Low) Max SPL: 135 dB
Self-noise: 14.0 dB(A)
Weight Length Max Diameter Interface(s)
270g (9.52oz) 72mm (2.83'') n/a
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48v

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