Professional Amplifiers
HPD-900/1500
POWER
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HPD 900
Dual Channel Professional Power Amplifier
CHANNEL A CHANNEL B
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POWER
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CHANNEL A CHANNEL B
HPD 1500
Dual Channel Professional Power Amplifier
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BRIDGED INSTALLATION
APPLICATION 2
Output mode set to BRIDGED
From mixing console mono out
(Optional connection using 1/4" TRS connector)
Passive Speaker
NOTE:
1. The HPD Series Power Amplifiers will supply high power to speakers in BRIDGED Mode(Refer to
the Specification Chart on Page 5). Please verify that your speakers are capable of handling
such power to avoid possible damage!
2. The minimum impedance of HPD Series Power Amplifiers is 4 Ohm in BRIDGED Mode. Please
verify that the impedance of your speakers connected to the amplifiers are higher than that!
Input sensitivity set to match input signal level
McLELLAND LM Series Console Mixer
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2
APPLICATION 1
From mixing console Left and Right main out
(Optional connection using 1/4" TRS connectors)
Output mode set to STEREO
Passive Speakers
NOTE:
1. The HPD Series Power Amplifiers will supply high power to speakers in STEREO Mode(Refer to
the Specification Chart on Page 5). Please verify that your speakers are capable of handling
such power to avoid possible damage!
2. The minimum impedance of HPD Series Power Amplifiers is 2 Ohm in STEREO Mode. Please
verify that the impedance of your speakers connected to the amplifiers are higher than that!
Input sensitivity set to match input signal level
STEREO INSTALLATION
McLELLAND LM Series Console Mixer
Introduction
Congratulations on choosing McLELLAND HPD Series professional high power amplifier! The HPD
series power amplifier come with the Class AB design output circuitry and high-current toroidal
transformer to ensure generous energy reserves even at 2 ohm load, deliver a premium quality,
combine light weight and extremely high power, and plus even greater value.
Please take a few moments to read the entire manual, and be sure to retain this document for future
reference. Please read and observe all safety instructions detailed on each page.
Using the controls / Front Panel
1. Power: It is used to switch on/off the power amplifier. Press UP for ON position and press DOWN
for OFF position. Whenever the power amplifier is switched on, the POWER LED on front panel
will light on.
2. Volume Controls: These two rotary volume controls are used to separately adjust the output
volume of Channel A and Channel B. Turn them clockwise could raise the output volume and turn
them counter-clockwise could reduce the output volume. When in BRIDGED output mode, use
Channel A rotary volume control to adjust the BRIDGED output volume.
3. POWER LED indicator: It is used to indicate the working status of the amplifier. Whenever the
amplifier is switched on, the LED will light on.
4. Channel A & Channel B signal LED indicators: These LED indicators are used to indicate the
input status of Channel A and Channel B. Whenever an input signal is existed to the channels, the
corresponding LED will light on.
5. PROTECT LED indicator: It is used to indicate the status of protect function. The HPD series
high power amplifiers have totally five kinds of protections: Output DC offset protection, short
circuit protection, over temperature protection, clip limiting protection, and faulty load protection.
These protections will be automatically switched on if there is any faulty. Whenever the protection
is switched on the LED will light on.
6. BRIDGE LED indicator: It is used to indicate the working mode of the amplifier. The HPD series
high power amplifiers have two working modes including Stereo and Bridge. Whenever the
amplifier is switched to the Bridge working mode the LED will light on.
7. Channel A & Channel B Peak LED indicators: These LED indicators are used to indicate the
output level of the two channels. Whenever the output level reaches clip the corresponding LED
will light on.
POWER
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CHANNEL A CHANNEL B
HPD 1500
Dual Channel Professional Power Amplifier
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Performance Specifications:
HPD-900 HPD-1500
Power Output @ stereo 8 ohm load 260 W per channel 430 W per channel
Power Output @ stereo 4 ohm load 450 W per channel 800 W per channel
Power Output @ stereo 2 ohm load 680 W per channel 1100 W per channel
Power Output @ bridge 8 ohm load 900 W 1500 W
Power Output @ bridge 4 ohm load 1200 W 2000 W
THD < 0.05% < 0.05%
Input CMRR > 80 dB > 80 dB
S/N Ratio > 100 dB > 100 dB
Input Sensitivity Switchable 1.55V/0.775V Switchable 1.55V/0.775V
Input Impedance Unbalance 10K ohm/Balance 20K ohm Unbalance 10K ohm/Balance 20K ohm
Frequency Response 20 Hz - 20K Hz 20 Hz - 20K Hz
Gain 32 dB 35 dB
Damping Factor > 200 > 200
Ventilation Flow-through ventilation from front to back Flow-through ventilation from front to back
Cooling
Internal heat sinks with variable high-speed ultra-
quiet fans
Internal heat sinks with variable high-speed ultraquiet fans
Protection
Output DC offset protection, short circuit protection,
over temperature protection, clip limiting protection,
faulty load protection
Output DC offset protection, short circuit protection,
over temperature protection, clip limiting protection,
faulty load protection
Dimensions 483 mm (W) x 88 mm (H) x 360 mm (D) 483 mm (W) x 88 mm (H) x 360 mm (D)
Weight 13.6 kg 16.5 kg
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