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Designed to be the workhorse of the class,  SRP 400 has a rigid aluminium pressured die cast enclosure.  Compact it may seem, it delivers powerful and puchy sound to make sure you capture all the transients and dynaimics, details and balance in your mix.  




Many finds it compact enough to travel along with.  The custom waveguide gives much wider sweetspot  for you to work in even the toughest environment.  Gurantee the same clean and accurate sound anywhere you go. 



  • Rigid pressure die-cast aluminium enclosure with non-parallel edges : Clean, Fast, Neutral ; No Colouration, no building-up 
  • 4.5" Curv® cone woofer ; 1" silk dome tweeter
  • Torodial transformer power sulpply for transient response with low noise
  • 25 W + 25 W  Class AB Bi-amplifier 
  • XLR, TRS Inputs
  • High, Low shelving EQs


Sonodyne SRP 400 - 4.5" Active Studio Reference Monitor

SRP 350/400/500 Colours
SRP 20x Colours
  • Enclosure Pressure Die-cast Aluminium ; Vented, Front-firing aerodynamic port
    HF Driver 26 mm (1") Silk Dome with custom waveguide, Magnetically shielded
    LF Driver 115 mm (4.5") Curv® Cone, Magnetically shielded
    HF Amplifier before clipping 25 W Class AB
    LF Amplifier before clipping 25 W Class AB
    Amplifier THD @ Rated Power < 0.1%
    Max SPL @ 1 m 100 dB
    Frequency Response 75 Hz – 22 kHz (±2 dB)
    Usable Frequency Response (-10 dB) 65 Hz – 25 kHz
    Crossover Frequency 3.0 kHz
    CMRR > 65 dB
    Inputs Balanced XLR, TRS
    Input Level (for 90 dB SPL @ 1 m) -2 dBu
    SNR @ Unity Gain > 90 dB (full output)
    Gain Control Range -∞ – +6 dB, 0 dB at center
    Controls (Front) Power, Gain
    Controls (Rear) Bass Tilt, Treble Tilt
    Bass Roll-off 100 Hz, 6 dB/octave
    Inidicator Power On/Off
    Protections Over Current, Overheat, RFI, On/Off Transients
    Pwer Consumption 70 VA max.
    Power Requirements 230 VAC, ±10 %, 50 Hz
    Dimensions 160 mm (H) x 232 mm (W) x 155 mm (D)
    Net Weight 4.4 kg
    Wall Mount Bracket SRP WB1
    Mounting Options 2 x M6 (rear) ; 4 x M6 (base)
  • Wall Mount Brackets  -  SRP WB1

    Carrying Bag  -  On special request

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