Tender Specification: PS-850

Passive subwoofer with 2 × 18" chassis with vented design.

The system is equipped with two high performance 18" long excursion chassis with 4" voice coil and water-resistant cones.
The enclosure is made of multiplex birch plywood with a particularly resistant polyurethane coating. 
The front grille is backed with acoustically transparent foam and powder coated in the same colour as the enclosure.
The subwoofer is equipped with the following fittings: one M20 thread for a distance rod, four slots for an rigging system and two catches for an optional front panel. The system also has two fittings for an optional wheel board and four handles on each side. A transportation cover is additionally available.
The subwoofer is suitable for use in vertical, horizontal or endfired bass arrays, as well as in cardioid setups. The enclosure has two mating slots on the top and two rubber skids on the bottom for building a vertical array.
Two recessed Speakon connectors are located on the front as well as on the back of the enclosure.
For operation, a system amplifier with the correct speaker preset is required. With these amplifiers the beam characteristics of a sub-array can also be electronically controlled in real time using a PC and free control software.

Electroacoustic Features
Acoustic design 		direct radiating, vented design
Components			2 × 18" long excursion chassis with 4" voice coil, water-resistant cones
Power rating (nominal)[1] 	2000 W
Maximum SPL[2] 			142 dB
Cut-off frequency[3] 		27 Hz
Nominal impedance 		4 Ohm

Mechanical Features
Enclosure 			multiplex birch plywood
Protection grille 		hexagonal perforated steel grille, powder coated in enclosure colour, backed by acoustically transparent foam
Fittings 			1 × M20 thread for distance rod, 4 × slot for rigging system, 2 × catches for front panels
Connections 			2 × Neutrik NL4 Speakon, recessed on the rear; 2 × Neutrik NL4 Speakon, recessed on the front for cardioid setups
Finish 				scratchproof polyurethane coating, black
Dimensions (W x H x D)		1200 × 600 × 900 mm
Weight[4] 			120/110 kg with/without rigging system
Transport wheels 		2 × fittings for optional wheel board
Handles 			4 × handles on each side
Miscellaneous 			2 × rubber skids on bottom, 2 × mating slots on top, 1 × fitting for cable strain relief on rear panel


[1] according to IEC-60268-5 long term
[2] peak, 20 ms with bandpass filtered pink noise according to IEC 60268-2, at one octave above the lower limit of the frequency range
[3] -10 dB under anechoic half space conditions with speaker preset
[4] net weight without optional equipment


Manufacturer: Fohhn Audio AG
Model: PS-850