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©2005 Diamond Audio Technology. All Rights Reserved
©2005 Diamond Audio Technology. All Rights Reserved
Amp Current Draw...
The following basic formula can be used as a quick guide to determine the total
amperage draw of a mobile audio system. This formula is based on a 50% amplifier
efficiency rating. Diamond Audio D9 amplifiers are actually much more efficient than
that, but others may be less.
Formula:
Total amplifier rated RMS power x 2 = Total Input Wattage
Total Input Wattage/Battery Voltage = Current Draw (Amps)
Examples:
A D9 800.4 amplifier has 4 channels at 100 Watts per channel RMS into 4 Ohms
totaling 400 Watts. Work the formula as follows:
400 Watts x 2 = 800 W
800 W/13.8 V = 58 A Total Current Draw
A D9 800.2 driven to a 4 ohm mono load has 800 Watts RMS of output, it's current
draw is figured this way:
800 Watts x 2 = 1600 W
1600 W/13.8 V = 115.9 A Total Current Draw
Note: If you are installing multiple amplifiers, add up the total current draw for all of
them and choose the appropriate gauge based on the grand total.
SPEAKER CONNECTIONS
Diamond Audio recommends using speaker wire of at least 16Êgauge. Lay out the wire in
the vehicle from the individual speaker locations to the amplifier(s). Observe safe wiring
precautions.
D9 Amplifiers will accept speaker wire up to 10Êgauge directly. Locate the speaker
terminal block on the end of the amplifier. Strip approximately 1/2Êinch of insulation
from the wire, insert the wire into the terminal, and tighten the Allen screw. Repeat for all
speaker wires. Please observe recommended minimum speaker impedances to prevent
possible damage.
Banana Jacks can be inserted into the speaker block. Remove the set screw completely
and insert the Banana Jack into the end of the block.
D9 PRE-AMP
One design focus of the new D9 series amplifiers is to become a new benchmark in
mobile audio amplifier performance. The D9 amplifiers are capable of extremely low
distortion (THD) and noise performance levels that rival or surpass the finest home and
professional audio amplifiers.
The filter circuitry on the D9 amplifier has been designed to be completely isolated from
the audio signal path unless engaged. As a default, there is no filtration or signal
processing engaged, this allows for the most accurate amplification of the signal
possible.
The D9 amplifier does feature second-order 12 dB/oct. Highpass, Lowpass, and Subsonic
Butterworth filters that are fully adjustable from 10 Hz to 5 kHz. These filters can be
engaged independently to suit any systems needs.
When engaged, these filter networks sum to a flat response at their -3dB break points.
This results in a smooth and seamless transition from one frequency band to the next.
Butterworth filters provide maximally flat frequency responses when compared to other
filter structures
