ttp-equiv="Content-Type" content="text/html; charset=utf-8"> Four Audio - HD2

Loudspeaker Management System HD2

For crystal clear audio from your loudspeaker system, Four Audio provides a loudspeaker management system with yet unheard audio performance, freely combinable IIR and FIR equalization and separate precision peak and RMS limiters in each output.

Download our flyer for an overview here

HD2 Module to be integrated in loudspeaker cabinets

Available I/O options
1 in 2 out
1 in 4 out
2 in 4 out
2 in 8 out
3 in 8 out

Features

96 kHz / 48 bit processing
ADC inputs configurable to provide 4 normal or 2 dual range inputs with extended dynamic range
1 AES/EBU digital input
1 I²S I/O provides an interface to Cobranet, Ethersound, ADAT, etc.
Sample rate converter for input rates <> 96 kHz
8 analog outputs
1 AES/EBU digital output
Configurable and programmable via Ethernet and RS232 interface
Windows remote software provided

Optional hardware extensions

AES/EBU extension for additional 8 channel digital I/O
ADAT extension for 8 channel digital I/O

Signal Processing

IIR filters: up to 96 fully parametric high precision filters freely configurable
IIR crossover filters with 6-60 dB/octave
FIR filters: 1 provided for each output channel
Mixed linear and minimum phase equalization possible
Max. frequency resolution: 3 Hz
Separate limiter thresholds for amps (peak and RMS) and loudspeakers (peak and temp.)
Interface to Monkey Forest for FIR filter and limiter calculation

Audio Performance

Max. input level	+28, +21, or +15 dBu (selectable)
Max. output level	+18 dBu
Frequency response (-0.5 dB)	4 up to 45 kHz
Dynamic ranges
ADC	> 130 dB (dual range mode) 118 dB (single range mode)
DAC	121 dB
Overall	121 dB (dual range mode)
THD (1 kHz)
ADC	-113 dB (+4 dBu) -105 dB (0 dBFS)
DAC	-110 dB (+4 dBu) -102 dB (+18 dBu)
All values ref. 20 Hz - 20 kHz, linear weighting