The Firenze-KS8 is a compact, self-powered, weather resistant subwoofer providing an exceptional peak output of 148 dB SPL. The KS8 features IPAL® technology, including a powerful amplifier module, a differential pressure sensor, a “zero latency” DSP and two 21” specifically designed high-efficiency transducers.

The Firenze-KS8 is also integrated in the simulation software EASE Focus to give endless possibilities of configurations like cardioid, virtual arc, and/or whatever the venue will require.



Type : Active subwoofer 

Transducers : 2x 21” Neodymium magnet woofer with 5.31” voice coil 

Frequency Response (1) : 25 Hz – 120 Hz (-6 dB)   

Maximum SPL (2) : 148 dB peak

Coverage : Omni   

Connectors : Analog, AES3 and Remote control: Easy-grip metal locking LK25 connector (MIL C 5015 and VG95234 spec.) 

Control : Remote control with dedicated PC software via Ethernet 


Built-in DSP : Input gain, delay up to 2 s, Full parametric IIR filters (Peaking, Shelving, Hi/Lo pass, Hi/Lo Butterworth), 

                      FIR filter for digital beam steering Level and Temperature remote monitoring 


Type : Switching-mode, class D with IPAL® technology 

Output power : 8500 W @ 1 Ω 

Power consumption : 400 VA 

Protections : Over Temp. (Power Limiting – Thermal Shutdown), Short Circuit/Overload Output Protection, Power Limiting, 

                     Clip Limiter/Permanent Signal Limiter, High Frequency Protection

Operating range : 100-240V AC, 50-60 Hz with PFC

Mains connector : powerCON with link inlet


Dimensions (W x H x D) : 1420 x 600 x 775 mm (55.90 x 23.6 x 30.5 in) 

Weight : 148 kg (326.3 lb) 

Material : Wood

Color : Black, Custom RAL 


IP Rating : Speaker Box: IP45 / Electronics: IP65 

Notes for data:

(1) With dedicated preset

(2) Maximum SPL is calculated using a signal with crest factor 4 (12dB) measured at 8 m then scaled at 1 m

New materials and design are introduced into existing products without previous notice.