Dateq DDA-2300 Installation And Operation Manual - Page 6

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AMPLIFIER OPERATION GUIDANCE

Setup

Before operating the DDA-x300 series ampliﬁer, check the mains supply voltage and connect the IEC inlet to the

mains power supply using the power lead supplied (or equivalent). Ensure that the cooling vents at front and rear are

not covered or obstructed in any way with adequate space for air-ﬂow through the unit.

Each side of the DDA-4300 series ampliﬁer can be operated as an independent pair of channels or as a single com-

bined output in Bridge mode. Set the mode using the selector switch for the relevant pair of channels (rear panel 7).

Bridge mode oﬀers the option of operating the DDA-4300 as a stereo ampliﬁer into 2 larger 8 speakers. It is also

possible to operate one side in Bridge mode to create 1 high output channel with the other side in stereo, which can

be useful to power a large sub and a pair of satellite speakers (left + right).

Stereo mode

Connect Left and Right speakers to Channel 1 and Channel 2 outputs via the SPK (rear panel 2, 3) . For SPK wiring,

connect + and - wires to pins 1+ and 1-. Ensure that the combined load on each channel is no lower than 40 (for

speakers in parallel, 8 + 8 = 4 ) Connect line level Left and Right inputs to the CH 1 and CH 2 XLR inputs ( rear

panel 6, 8)

Parallel mode

Connect the speakers to the speaker outputs as described above but both outputs will only receive a mono signal from

the CH 1 XLR input ( rear panel 8) and is controlled by CH1 volume control ( front panel 1)

Bridge mode

Bridge mode is diﬀerent to the other 2 modes in that it combines both output channels to a single mono output. This

mode enables double the power to a single speaker output compared with Stereo or Parallel modes. The diﬀerence is

that the speaker load must be no lower than 8 , whether a single speaker or combined load. Bridge mode can be

useful especially when driving a large, high power subwoofer. Connect speaker(s) to the Channel 1 SPK output.

Connect the "+" speaker wire to ampliﬁer 1+ (rear panel 3) and the "—" speaker wire to ampliﬁer 2+ (rear panel 3).

Incorrect speaker wiring can damage the ampliﬁer! Bridge output receives a mono signal from CH 1 XLR input (rear

panel 8) and is controlled by CH 1 volume control (front panel 1)

Operation

With channel gain controls (front panel 1, 5) turned fully down (anti-clockwise), switch on the power (front panel 6) and

the LED POWER indicator will light. Playing the input signal into the connected channel inputs, gradually increase the

relevant gain controls (only CH 1 will have an eﬀect in Bridge mode). The ampliﬁed signal should be heard through the

speakers and the SIG indicators (front panel 2, 4) should respond to the audio output. Increase the volume controls to

the required level. Alongside the SIG indicators are CLIP indicators, which should only light very brieﬂy on the loudest

transients or spikes in the audio. If the CLIP LEDs light for more than a fraction of a second at a time, the volume

controls should be turned down or input signal will need to be reduced.

Before powering down, turn down the volume controls to avoid loud pops or noises through the speaker.