uniK 04

Professional Active Reference 4" Studio Monitors

Our active uniK 04 reference studio monitors deliver drastically improved sound distribution with high transparency compared to other speakers of this level. The sound system has been optimized for both phase and level and has been engineered in Germany following extensive tests and measurements. As the smallest model of our uniK series, the uniK 04 pair features many of the distinctive elements of its larger siblings like a special mechanical design that provides an exceptionally rich sound without any unwanted resonance. Just don't get fooled by the remarkable small size, your pair of uniK 04 will be an important part of your recording studio very quickly!


  • 2-way, 1 speaker with amplifier, 1 speaker passive
  • Active Studio Monitor Speaker
  • 1" silk dome tweeter (HF driver)
  • 4" kevlar curved cone (Magnetic shielding Type) LF driver
  • Output Power: 50W
  • Frequency Response: 55Hz-20kHz -10dB SPL
  • 27kOhm Input Impedance
  • 5.7kHz Crossover Point
  • SPL: 82dB ?3dB @1W / 1M bei 300. 400. 500. 600 Hz
  • Related Noise Power: 15W (THD1%, 4ohm load, 1kHz)
  • Input Sensitivity: 135mV@1W; 525mV@15W (1kHz)
  • 2x TRS1/4" balanced / unbalanced inputs
  • Output R+ / R- for right passive speaker
  • blue LED display (power)
  • dimensions / piece: 150 x 210 x 160 mm
  • weight: 2,45 kg (active) / 2,1 kg (passive)

Reviews and Testimonials

Here are selected reviews of uniK 04:


Dr Derek Williams, creator of the iPad Sibelius Wizard, is using a pair of uniK 04 for his work - "When I switched the uniK's on, it was as though a veil had been lifted from the sound the first time I listened."



Danish website Tweak.dk contains a detailed positive review for our uniK 04 - you can find the complete review (with a score of 98% and an Editors Choice award) here.



The 2012 "Best of Workshops" issue of RecMag (Germany) features a uniK 04 review by Lennart Jeschke: "The ESI systems makes a good overall sound impression." / "They are a good choice as secondary monitor for mixing and mastering or as control speaker in broadcasting."


If you are interested in adding a review to this list, do not hesitate and contact us.