The SD-2 amp loudspeaker is a powered version of the SD-2 loudspeaker system that combines exceptionallyaccurate reproduction with high SPL output in a very compact enclosure. The SD-2 amp uses a proprietary 12 inch cone low frequency driver mounted in a vented enclosure with carrying handles, four aircraft pan fittings (two on top, tow on bottom) and one 35mm tube stand adaptor. The high frequency unit is a 3 inch diaphragm high frequency compression driver couple to a in house designed 90°x 40°CD horn. A unique Active Speaker Output, (ASO) allows the user to connect a slave unit (SD-2) to the SD-2 amp.

Key features 
  • High power
  • Self powered
  • Monitor & FOH presets
  • Ethernet Networking
  • PC remote controlled

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Frequency response (1):   55Hz - 20'000Hz

Phase response:   350Hz - 10KHz +/- 45°

Maximum peak SPL (2):   133dB

Directivity:  H 90° x V 40°


Low frequency:     1x 12", long excursion, ferrofluid cooled

High frequency:    1x 3" diaphragm. compression driver, ferrofluid cooled, loaded with 90° x 40° CD horn


Output power (low1) (5):   1'250W 

Output power (low2) (5):   1'250W 

THD, DIM, SMPTE:   <0,05%

Audio Input 

Type:   Analog Differential balanced input circuit

Connectors:    Female XLR; Male XLR loop

Nominal impedance:   10K Ohm

AC Power 

Connectors:   Female PowerCon, in; Male PowerCon loop

Input voltage:   115V - 230V nominal +/- 10%


Sampling rate:   96 Khz

Basic delay:   0.76 ms

Dynamic range:   115dB

Remote / Network 

Type: Ethernet

Connectors:    RJ45 female, RJ45 loop


Cabinet Size (WxHxD):   400 x 600 x 365 mm 

Cabinet finish:   18mm plywood, black epoxy painted, other colours on request

Rigging:   Aircraft Rigging points, top and bottom

Protective grill:   Removable perforated 1,6mm steel, grey foam cover inside

Weight:   32Kg


Elements & Accessories 
  • SUB3-amp
  • SUB400-amp
  • SUB800-amp



(1) Frequency response: +/- 3dB, measured at 3 meters, on axis, half-space conditions -  MLSSA 1/3 octave

(2) Max peak SPL: Measured with music referred to 1 meter

(3) Crossover: Acoustical crossover frequency - at these frequency, transducers produce equal sound pressure level

(4) AES: Power handling is measured under AES standard conditions

(5) Power AMPS: Amplifier RMS output power per channel into 2 ohms, both channel driven