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3. The completely digital 4-channel DSP-amplifier
The DA 428 is a completely digital 4-channel amplifier with 700 W @ 4 ohm output power
on each channel. This compact, light- weight 19"-2U device is equipped with
comprehensive DSP features like matrix router, 6 fully parametric equalizers, two
crossover networks, delay and dynamic processor per channel. All parameters as well as
user navigation can be managed using a simple 5-key navigation pad together with
4 rotary encoders. The sophisticated user interface is completed by a graphic LCD
display and 4 RGB LED`s informing about relevant operation parameters and state of the
single channels.
Factory and user presets may of cause be stored inside the unit, an SD- card reader is
implemented and can be used to easily transfer preset and system information to other
units. An preset editor software and various firmware add- ons are available as well.
On the inputs side are 4 analogue connections as well as 2 digital ports accepting
AES/EBU and SPDIF formats of 16 to 24 bit and 32 to 192 kHz sampling frequency.
4 link sockets, either carrying the signal applied to the inputs can be routed as
“processed” digital outputs carrying AES/EBU of 24 bit / 48 kHz. The designers also
implemented a module slot for future updates, i.e. connections to audio / control
networks, standard- fitted with module RSNC equipped with a RS232 connector and a
´normally closed´ contact feature. Global remote control is guaranteed using future
firmware upgrade modules, but even the standard version contains simple remote
features. Another important feature is the PFC controlled, audio-optimised wide-range
switched- mode power supply of the last generation.
The outside power connection was realised using a self- locking Neutrik PowerCon
connector, 4 Neutrik Speakon sockets (two are wired ´bi-amp´) ensure the connection to
the speaker systems. An extensive set of protective circuits and digital monitoring
components is included ´´rounding off´´ the professional features of this equipment.
The DA 428 is usable for stage monitor operation to system operation of passive
PA components or realisation of professional multi- channel systems within sound
installations.
4. The delivery status
The scope of delivery includes: 1x DA 428, 1x PowerCon-mains cable and
user manual
When you power up the DA 24 for the very first time the following default parameters in
the main menu are pre-set:
- „Preset 1“ is loaded
-
Sig. LED threshold is adjusted to -50 dB
-
User LED threshold is adjusted to 0 dB (0 dB = deactivated)
-
output levels are shown on the LCD display
-
input A and B are switched to analogue
-
a password is not entered
This User Manual corresponds to the software version V1.01 r35.
It is obvious in the menu item „Diagnostics“!
