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IM1.5 Insert Machine

The IM1.5 1U 19 inch insert machine is ideal for the most demanding studios. The IM1.5 serves as an entirely transparent passive insert machine, and it also features bypassable active circuitry for functions such as input gain, mid/side processing, parallel processing, and stepped output gain. Utilizing our renowned analog circuitry, the IM1.5 includes 1 stereo input, 1 stereo output, and 4 stereo inserts (following the analog Tascam DB25 standard). Thanks to sealed relays, all inputs, outputs, and inserts remain fully passive, ensuring no alteration of sound during electronic switching.

The exceptionally transparent active input and output gains offer a gain range of +/- 5.5dB in 0.5dB steps. The blend circuit on insert 1 features two separate controls for wet and dry, allowing for fully independent gain blending and level matched AB'ing. Insert 2 is fully passive. Inserts 3/4 can operate in passive or mid/side mode,. Additionally, the MS width can be adjusted from -6.5dB to +3.5dB.

Key functions

  • Connect up to 4 stereo analog processors and process to your liking, the centrepiece for the most demanding studios.
  • All inputs, outputs and inserts switching employ sealed relays, ensuring a fully passive signal path.
  • 1 stereo input (XLR), 4 stereo inserts (analog DB25 standard), 1 stereo output (XLR).
  • Transparant active input and output gains, blend/parallel and mid/side processing.

Availability and prices

  • Leadtime: approx 3 weeks after order
  • Price (no added options): 2500 euro excluding 21% VAT and shipment.
Technical information


  • 1 stereo input with bypass-able stepped active gain (+/-5.5db)


  • insert 1 with bypassable parallel processing (seperate wet/dry) on insert 1
  • Insert 2 is passive
  • insert 3 / 4 with bypassable mid/side and width control

* All inserts follow the analog Tascam DB25 standard, click here for more information.


  • 1 stereo output with global insert bypass and active gain *

* The default output stepped attenuator is set to 0.5dB or 0.25dB per step with a max gain range of +/- 5.5dB or +/- 2.75dB.
* It's also possible to order the IM2.1 with a selectable gain-range of 0.25/0.5dB per step with a small toggle switch above the gain attenuator. 
* A potmeter with a gain range of +/-10dB is also possible. This functionallity can also be used as a bypass gain compensation.


  • Input and output with goldplated neutrik XLR's
  • Inserts with goldplated DB25 analog tascam standard.

  • Maximum gain passive: >+24dBu
  • Maximum gain active stages: +24dBu
  • Noise level passive: >118dB(a)
  • Noise level active: >116dB(a)
  • Stereo crosstalk: >110dB(a)
  • Stereo crosstalk mid/side: ~80dB(a)
  • THD passive: 0.00042% (AD/DA limitations)
  • THD active: 0.00045%

  • Input voltage 100 to 240VAC 50/60HZ. (external PSU)
  • Power consumption minimum 3 watt maximum 20 watt
  • Unit size: 1u 19 inch, depth 25cm
  • Weight: approx 2kg