Speaker Connections; D9 Pre-Amp - Diamond D9 & TDX TECHNOLOGY Owner's Manual

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
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