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DA 428
Digital functionality:
The K.M.E. DA 428
and DA 230 are fully digital multi-channel ampli-
fiers with comprehensive DSP features and four
(DA 230: two) Class D amplifier channels of the
newest generation. The DSP functions contain
matrix router, six fully parametric equalizers, two
crossover networks, high-/low-pass filter, delay,
dynamic processor with compressor/Peak RMS
limiter, gain control fixed or variable, and polarity.
All parameters as well as user navigation can be
managed using a simple 5-key navigation pad to-
gether with 4 rotary encoders. The sophisticated
user interface is completed by a graphic LCD dis-
play and 4 RGB LEDs informing about relevant
operation parameters, preset names and state of
the single channels. Practice oriented control fea-
tures make also complex adjustments on the de-
vice like preset settings easy. All settings can be
locked in different levels via the lock function and
can be saved from unwanted changed by entering
a password. Permanent monitoring of all relevant
parameters including log book functions like using
and power hour meter make it a perfect device for
rental companies.
The storage medium:
In the amplifier is also im-
plemented a SD card reader in the front, this inter-
face enables to transfer K.M.E. preset files or firm-
ware updates (later software updates) saved on an
SD card efficiently to other devices. The internal
storage is devided into the free-programmable user
sector and the fixed factory sector.
The software:
By means of an editor software
you can create independently your own presets
quickly on the computer, save this K.M.E. preset
files on a SD card and transfer it to the DA 428.
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SD-card reader
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4 RGB LED’s
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4 rotary encoders
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LCD display
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navigation pad
6
mains-connector & fuse,
ground-free switch
7
signal inputs (XLR):
4 x line-in, 4 x link-out
(max. 4 x analogue or 2 x digital
and 2 x analogue)
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speaker output
4 x Speakon NL4
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module slot (serial RS232)
DIGITAL CONTROLLER AMPLIFIER
DA 428
DA 230
Electronic
max. output power @ 4 / 8 Ohm
4 x 700 W / 400 W
2 x 1500 W / 750 W
Amplifier
four fully digital amplifiers with high efficiency,
about 90 %
two fully digital amplifiers with high efficiency,
about 90 %
Frequency range
20 Hz - 20 kHz
S/N ratio (A-weighted/unweighted)
100 dB / 95 dB
Input sensitivity
analog 0 dB (775 mV)/ digital -12 dBFS/ with clean output channel, adjustable
Crosstalk @ 1 kHz
> 90 dB
Damping factor @ 1 kHz
> 500
THD @ 1 kHz
< 0,5 %
Voltage gain @ 4 / 8 Ohm
36 dB
40 dB
Slew rate, V/µs internal
> 70
Slew time, µs/V internal
<1,5
Features
per channel: gain, digital crossovers, subsonic filter, parametric EQs, dynamic processor, polarity, delay, matrix router
Protective circuits
for single channels: short circuit, DC on output, impedance undercut
for the device: under- / overvoltage, temperature, overload
Power consumption
2500 W
2600 W
Power requirements
90 -250 Volt / 50 - 60 Hz, PowerCon In
Operation modes
stereo, mono, 4-channel (free routable)
stereo, mono, 2-channel (free routable)
Control panel
ground free, navigation pad, 4 rotary encoders, 4 RGB LEDs, LCD-display, SD-card reader
Connectors
line-in 4 x XLR, link-out 4 x XLR electrically balanced
(max. 4 x analogue or 2 x digital & 2 x analogue);
speaker output 4 x Speakon NL 4; RSNC-module
line-in 2 x XLR, link-out 2 x XLR electronically balanced
(max. 2 x analogue or 1 x digital & 1 x analogue);
speaker output 2 x Speakon NL 4; RSNC-module
Processor
DSP
24 bit, 48 MHz clock
Unit delay
<1,5 ms
Sampling
24 bit
Digital input
AES/EBU & S/PDIF with format- / sample rate converter (max. 192 kHz)
Digital link (link / procedded out)
same as input / 24 Bit, 48kHz, AES/EBU
Preset memory
internal: 12 presets, additional presets on SD card
Dimensions (WxHxD) mm
483 x 88 x 375
Weight (kg)
8,5
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