DB Drive APM 250.4D Manual de usuario

Due to continuous improvement of the product the Specifications are subject to change without notice.

APM 250.4D, AMP 300.2D

Low Impedance Stability

APM 250.4D - 2 Ohm Stereo (4 Channel)

APM 300.2D- 2 Ohm Stereo ( 2 Channel)

Bass Boost

For added low frequency performance the amplifiers are equipped with a variable 0dB-12dB

bass boost @ 45Hz

Conformal Coating

The internal components of APM amplfiers have been coated with a marine grade

protective coating that shield them from the elements. This asures optimal performance

in even the most rigourous enviroments. Although the amplifier is protected agaist the

elements , it does not make the amplfier 100% water resistant. Special care must be

taken when chosing a mounting location to asure that it does not end sumerged under

water.

The “APM Marine” amplifiers include built-in variable crossovers. The APM 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 APM 300.2 offers a

12dB per octave slope when set to either Low or high pass settings.

Variable Crossover

Due to the smaller foot print of the amplifier, external fusing is required.

Power Fusing

APM 250.4D

4 CHANNEL FULL RANGE CLASS D MARINE AMPLIFIER

4 CHANNEL

2 CHANNEL

APM 250.4D

APM 300.2D

“APM 250.4D”

APM 250.4D APM 300.2D

The APM 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

.epolsssapdnaB/ssapwoLbd42onom

For example if you wish to drive a pair of subwoofers on channels 3 and 4 in the br acuoy,edomdegdi n

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 -xehttestsumuoyretl

over switch to LP/BPstereo. Once the LP/BP stereo switch setting is selected youwill use both the

Lowpass and Highpass controls to lter out the unwanted low and high frequencies to create the

desired Bandpass ehtesuoT)4dna3slennahcylnonoelbaliavasirevossorcssapdnaBehT(.retl

Highpass lter select the x-over switch to the HP setting, this will lter out any unwanted low

frequencies with 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 amplier is equipped with a built-in variable crossover networks allowing you to select

the crossover mode and desired crossover poin required to properly tune your set-up.

allo

s you to lter out any unwanted low

Frequencies from being reproduced by your subwoofers.

Frequencies from reaching your speakers or Selecting the Low pass function elimates high

APM 300.2D

The high pass crossover

Low Pass Control High Pass Control

Selectable Crossover

Dimensions

APM 250.4D

APM 300.2D

Height

1.88in/47mm

Width

6.22in/158mm

Length

7.32in/186mm

Peak @ 14.4V :

4 ohms

Frequency Resp.

S/N Ratio (A-weight)

THD with 80k ﬁlter

Low Input Level

Ch 1 & 2 HighPass Filter

Bass EQ

Input Voltage

APM 250.4D

4 x 150 W

20Hz - 28KHz

>95dB

<0.5%

50Hz - 3KHz

Ch 3 & 4 HighPass Filter 10Hz - 500Hz

Low Pass Filter 50Hz - 3KHz

0dB - 18dB @ 45Hz

11.2V - 14.4V

4 x 250 W

APM 300.2D

20Hz - 28KHz

>95dB

<0.5%

0dB - 18dB @ 45Hz

11.2V - 14.4V

2 ohms 2 x 450 W

2 x 300 W

210Mv - 6V 210Mv - 6V

N/A

15Hz - 150Hz

30Hz - 150Hz

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