DB Drive OKUR A8 250.4D User manual

Due to continuous improvement of the product the Specifications are subject to change without notice.
A8 250.4D, A8 1750.1D, A8 2000.5
A8 250.4D
4 CHANNEL FULL RANGE CLASS D AMPLIFIER

Low Impedance Stability
A8 250.4D - 2 Ohm Stereo (4 Channel)
A8 1750.1D - 1 Ohm Mono
A8 2000.5 - 2 Ohm Stereo ( 5 Channel)
Bass Boost
For added low frequency performance the amplifiers are equipped with a variable 0dB-18dB
bass boost @ 45Hz
The “A8 Series” amplifiers include built-in variable crossovers. The crossover features
a variable frequency selection for precise 24dB per octave low pass filtering for all mono
amplifiers. The A8 250.4D offers an independent 12dB per octave High Pass and Low
Pass X-Over on channels 1&2 and a Selectable 12dB or 24dB per octave X-over on
channels 3&4. The A8 2000.5 offer a 12dB per octave slope for Channels 1-4 and a
24dB per octave slope for subwoofer channel.

A8 250.4D
4 CHANNEL FULL RANGE CLASS D AMPLIFIER

4 CHANNEL

A8 250.4D / A8 2000.5
A8 Series
A8 250.4D
A8 250.4D
A8 2000.5
1 Ohm Subwoofer

A8 250.4D A8 2000.5
A8 1750.1
The A8 250.4D ampli er is equippedwith a variable crossover network thatallows you to select the
crossover mode (Highpass—Full Range) and desired crossover point for channels 1 and 2. Channels 3
and 4 allow you to select between a Highpass 12db slope, a 12db Stereo Lowpass / Bandpass slope and a
mono 24db Lowpass / Bandpass slope.
For example if you wish to drive a pair of subwoofers on channels 3 and 4 in the bridged mode, you can
select the LP/BP mono switch setting on the ampli er to lter out the high frequencies with a 24db
slope. You will then need to adjust the Lowpass control to the desired frequency setting (make sure to
have the Highpass control set to 15Hz so that the Bandpass lter does not engage)This will only send
low frequencies to your subwoofers. If you wish to use the Bandpass crossover lter you mustset the x-
over switch to LP/BPstereo. Once the LP/BP stereo switch setting is selected you will use both the
Lowpass and Highpass controls to lter out the unwanted low and high frequencies to create the
desired Bandpass lter. (The Bandpass crossoveris available on only channels 3 and 4) To use the
Highpass lter select the x-over switch to the HP setting, this will lter out any unwanted low
frequencieswith a 12db slope.
Channel 3 & 4
Highpass Control
Channel 1 & 2
Highpass Control
Channel 3 & 4
Lowpass Control
Channel 3 & 4 Bandpass Control
when function is activated
24db/Oct Lowpass/Bandpass
Mono output
Channel 3 & 4
12db/Oct Lowpass/Bandpass
Stereo output
Channel 3 & 4
The A8 1750.1D is equipped with a state of the art 24db per octave Lowpass crossover network. A
be required.
Lowpass Filter
Sub Sonic Filter
Bass EQ
The A8 2000.5 ampli er is equipped with a built-in variable crossover networks allowing you to select
the crossover mode and desired crossover pointfor each the front, rear and subwoofer channels.
Channels 1and 2 allow you to select either the Highpass crossover which lters out any unwanted low
frequencies from reaching your speakers or Selecting the full setting turns o any crossover lter
function for channels 1 and 2.
Channels 3 and 4 allow you to select either the Highpass crossover which lters out any unwanted low
frequencies from reaching your speakers or Selecting the full setting turns o any crossover lter
function for channels 3 and 4.
Channel 5 has a variable Lowpass lter that lters out any unwanted high frequencies from reaching
your subwoofers. The bass boost feature allows you do boost the low end at 45Hz.
Channel 5 Lowpass Control
Channel 1 & 2
Highpass Control
Channel 3 & 4
Highpass Control

Peak @ 14.4V :
2ohm
Frequency Resp.
S/N Ra o (A-weight)
THD with 80k filter
Low Input Level
Crossover Freq.
Bass EQ
Bass Remote Capability
Input Voltage
A8 1750.1D
1 x 400 W
Rated @ 1 x 600 W @ 1 Ohm
1 x 750W
20Hz - 220Hz
>95dB
<0.5%
285mV - 6V
40Hz - 150Hz
0dB - 18dB @ 45Hz
Yes (Remote Included)
11.2V - 14.4V
1ohm
Dimensions
A8 250.4D
A8 1750.1D
A8 2000.5
Height
1.88in/47mm
1.88in/47mm
1.88in/47mm
Width
6.22in/158mm
6.22in/158mm
6.22in/158mm
Length
7.32in/186mm
7.32in/186mm
10.55in/268mm
Peak @ 14.4V :
4 ohms
Rated @
Frequency Resp.
S/N Ra o (A-weight)
THD with 80k filter
Low Input Level
Ch 1 & 2 High Pass Filter
Bass EQ
Bass Remote Capability
Input Voltage
A8 250.4D
4 x 150 W
4 x 125 W
20Hz - 28KHz
>95dB
<0.5%
285mV - 6V
50Hz - 3KHz
Ch 3 & 4 High Pass Filter 10Hz - 500Hz
Low Pass Filter 50Hz - 3KHz
0dB -
Yes (Remote Included)
18dB @ 45Hz
11.2V - 14.4V
4 x 250 W
A8 2000.5D
4 x 125 W / 1 x 600 W @ 2 Ohm
4 x 110 W / 1 x 485 W @ 2 Ohm
20Hz - 28KHz
>95dB
<0.5%
285mV - 6V
10Hz - 150Hz
10Hz - 150Hz
50Hz - 3KHz
0dB -
Yes (Oponal)
18dB @ 45Hz
11.2V - 14.4V
4 x 250 W
2 ohms