14
PD3000
Quick Start Guide
15
strain relief clamp
sleeve
tip
sleeve
(ground/shield)
Unbalanced ¼" TS connector
tip
(signal)
Outputs
Your PD amplifier requires speakON twist-locking professional speaker connectors. These professional speaker connectors were developed specially for driving high-
powered speakers. The connectors snap in securely, prevent electric shock, and ensure correct polarity.
The CHANNEL A output contains output pins for both CHANNEL A (1+/1-) and CHANNEL B (2+/2-), so that both channels, if desired, can be sent out simultaneously on a
single 4-pole speaker cable.
The CHANNEL B output, on the other hand, has pin outs for CHANNEL B only (1+/1-).
◊
◊
Whenever possible, use thick and short speaker cables to minimize power loss.
3.3 Connecting to mains
Always connect your PD amplifier to the voltage specified on the rear of the device. Connecting the amp to an incorrect voltage can permanently damage your amp.
Before powering up the amplifier, double-check all connections and fully lower the gain setting.
strain relief clamp
sleeve
ring
tip
sleeve
ground/shield
For connection of balanced and unbalanced plugs,
ring and sleeve have to be bridged at the stereo plug.
Balanced ¼" TRS connector
ring
cold (-ve)
tip
hot (+ve)
1-
2-
2+
1+
1-
2-
2+
1+
front view
rear view
Professional speaker connector
(compatible with Neutrik speakON connectors)
Maximum recommended cable length for
Cable Size
2 ohm
4 ohm
8 ohm
AWG
mm2
meter
feet
meter
feet
meter
feet
12
2.0
9
30
18
60
36
120
10
2.6
15
50
30
100
60
150
(9)
BALANCED INPUTS (¼" connections)
accept audio inputs for each channel from audio cables with ¼" TRS connectors (balanced) or ¼" TS
connectors (unbalanced).
BALANCED INPUTS (XLR connections)
accept balanced audio inputs for each channel from audio cables with XLR connectors.
NOTE:
The XLR and ¼" connections in the BALANCED INPUTS section are physically linked, and users can use this physical connection to route a copy of the input
signal to an additional amplifier. For example, a signal coming in to Channel A through the XLR connection can be split and routed back out over Channel A’s ¼"
TRS connection.
(10)
XOVER
switch chooses between three crossover modes: FULL RANGE, LF (low frequency crossover) and HF (high frequency crossover). In LF mode, the unit
amplifies only the low frequencies below 100 Hz. In HF mode, the unit only amplifies the high frequencies above 100 Hz. LF and HF modes are typically used in
bi-amping applications.
(11)
MODE
switch selects between MONO and STEREO operation modes:
•
Stereo
: Inputs A and B are amplified individually and are separately available on SPEAKER OUTPUTS A and B.
•
Mono
: Input A is amplified and available on both SPEAKER OUTPUTS A and B. Input B is disabled.
NOTE:
Attenuation of SPEAKER OUTPUTS A and B is individual in both modes on the front panel through the CH A/CH B attenuation knobs.
3. Installation
3.1 Rack mounting
Your PD amplifier fits into a 19" rack and requires two rack units. Install into the rack using four attaching screws and washers for the front panel. Consider reinforcing
the back panel using rack accessories (supplied with rack), especially if you will be taking the PD on the road. Make sure enough cool air reaches the rack, especially
when other rack equipment emanates a lot of heat. The PD amplifiers circulate heat from the front to the rear vents to relieve heat inside the rack enclosure.
If you are installing multiple power amplifiers into a 19" rack, add filled panels in the empty rack spaces to avoid circulation of hot air.
Fan speed adjusts automatically to assure safe operation. Never block ventilation openings. Should internal temperature reach extreme values, the unit will shut down
automatically, and resume operation when cooled down.
3.2 Connections
Audio inputs
Each channel input uses either XLR or ¼" jacks. The XLR jacks can accept balanced XLR connections, while the ¼" jacks can accept both balanced ¼" TRS connectors
and unbalanced ¼" TS connectors. To deploy XLR connectors for unbalanced signals, bridge pins 1 and 3; mono ¼" TS connectors do not require any alteration to carry
unbalanced signals.
When working with balanced signals, please make sure to exclusively use balanced cables.
One unbalanced cable in the signal chain can change a balanced signal into an unbalanced signal.
output
For unbalanced use, pin 1 and pin 3
have to be bridged
1 = ground/shield
2 = hot (+ve)
3 = cold (-ve)
input
1
2
3
1
2
3
Balanced use with XLR connectors
