Amplifiers
Industry-standard Power Amplifiers from 550W/channel to 1,200W/channel
We stock power amplifiers that are adequate for most public address requirements, which can be hired individually or as part of (or to extend) a packaged PA system.
d&b audiotechnik
d&b audiotechnik D12
Our premium PA systems use D12 amplifiers. The D12 combines state-of-the-art DSP with a high-performance power-supply and output stage to provide our d&b audiotechnik loudspeakers with the best audio performance available.
Connectors
Input Analogue CH A/CH B: 3-pin XLRF
Input impedance: 44 kΩ, electronically balanced
CMRR, 20 Hz - 20 kHz: >63 dB
Maximum Input Level: +25 dBu (+27 dBu @ 0 dBFS)
Link Analogue CH A/CH B: 3-pin XLRM, signal parallel to Input
Input Digital AES/EBU: 3-pin XLRF
Input impedance: 110 Ω, transformer balanced
Sampling: 48 kHz / 96 kHz/ 2 Ch/n
Synchronisation, Word Sync: PLL-locked to source (slave-mode)
Link Digital (Output): 3-pin XLRM
Electronically balanced
Analogue signal buffering (refresh)
Power Fail Relay (bypass)
Out A/B: NL4
Remote: 2 × RJ45 parallel
Service: D-SUB-9 (female)
Protection Circuits
Mains inrush current limiter
230V: 5A RMS
110/115V: 10A RMS
Speaker switch-on delay: ≅2S
Overvoltage protection: up to 400 VAC
Self-resetting overtemperature protection: 75°C/167°F
Output S/C / O/C protection: ±60 A peak
Overload protection amplifier circuit: SOA of the output stage
Audio Data (linear setting with subsonic filter)
Rated output power (THD + N 0.1%, both channels driven)
8Ω: 750W
4Ω: 1,200W
Frequency Response (-1 dB): 28 HZ - 40 kHz
Distortion
THD+N, 20 Hz - 20 kHz: <0.1%
IM (SMTPE), 20 Hz - 20 kHz: <0.1%
Signal to Noise (unweighted RMS): >110 dBr
Damping Factor (20 Hz - 1 kHz into 4Ω): >200
Crosstalk (20 Hz - 20 kHz): <-65 dBr
Digital Signal Processing
Sampling Rate: 96 kHz / 27-bit ADC / 24-bit DAC
Basic Delay: 0.3 mS
ADC dynamic: >110 dB
Input dynamic: >127 dB
DAC dynamic: >110 dB
Power Supply
Autosensing switched-mode, 115/230 V, 50 - 60 Hz
Mains connector: Neutrik PowerCON, 20A
Mains Voltage 115 V (min./nom./max.): 98/115/134 V
Mains Voltage 230 V (min./nom./max.): 195/230/265 V
Mains Fuse: 2 × 20 mm, 10A Time Lag (T)
Dimensions
Width: 19″ (483mm)
Height: 3U
Depth: 353 mm
Weight: 9.5 kg
D12 Hardware ManualQSC
In all other systems we use amplifiers manufactured by QSC, principally:
QSC PLX3102
QSC amplifiers sound great with Martin Audio Blackline speakers. The PLX3102 (2 × 900 watts into 4 Ohms) is outstanding.
Stereo (both channels driven)
8Ω FTC 20 Hz - 20 kHz 0.05% THD: 550W
8Ω EIA 1 kHz 0.1% THD : 600W
4Ω FTC 20 Hz - 20 kHz 0.05% THD: 900W
4Ω EIA 1 kHz 0.1% THD: 1,000W
2Ω EIA 1 kHz 1% THD: 1,550W
Bridge Mono
8Ω FTC 20 Hz - 20 kHz 0.1% THD: 1,900W
8Ω EIA 1 kHz 0.1% THD: 2,100W
4Ω 1 kHz 1% THD: 3,100W
Signal to Noise 20Hz - 20 kHz 0.05% THD: -107 dB
Input Sensitivity @ 8Ω: 1.23 Vrms
Voltage Gain @ 8Ω: 35 dB
Output Circuitry: 2-Step Class H
Power Requirements1: 4.75A
Distortion (SMTPE-IM): <0.02%
Distortion (typical)
1/8 rated power, 20 Hz - 20 kHz: <0.02%
Full rated power, 20 Hz - 20 kHz: <0.02%
Damping Factor: >500
Input impedance: 20kΩ Balanced
Input Clipping: 11 Vrms (+21 dBu)
Cooling: Variable-speed fan, rear to front airflow
Input Connectors: XLR/TRS jack
Output Connectors: NL4
Amplifer Protection: S/C, O/C thermal, infrasonic, ultrasonic, RF. Stable into reactive or mismatched loads.
Load Protection: On/off muting, DC-fault power-supply shutdown.
Width: 19″ (483mm)
Height: 2U
Depth: 379 mm
Weight: 9.5 kg
QSC PLX3602
The PLX3602 (2 × 1,100 watts into 4 Ohms) is the most powerful amplifier in the range.
Stereo (both channels driven)
8Ω FTC 20 Hz - 20 kHz 0.05% THD: 725W
8Ω EIA 1 kHz 0.1% THD : 775W
4Ω FTC 20 Hz - 20 kHz 0.05% THD: 1,100W
4Ω EIA 1 kHz 0.1% THD: 1,250W
2Ω EIA 1 kHz 1% THD: 1,800W
Bridge Mono
8Ω FTC 20 Hz - 20 kHz 0.1% THD: 2,500W
8Ω EIA 1 kHz 0.1% THD: 2,600W
4Ω 1 kHz 1% THD: 3,600W
Signal to Noise 20Hz - 20 kHz 0.05% THD: -107 dB
Input Sensitivity @ 8Ω: 1.23 Vrms
Voltage Gain @ 8Ω: 36 dB
Output Circuitry: 2-Step Class H
Power Requirements1: 5.75A
Distortion (SMTPE-IM): <0.02%
Distortion (typical)
1/8 rated power, 20 Hz - 20 kHz: <0.02%
Full rated power, 20 Hz - 20 kHz: <0.02%
Damping Factor: >500
Input impedance: 20kΩ Balanced
Input Clipping: 11 Vrms (+21 dBu)
Cooling: Variable-speed fan, rear to front airflow
Input Connectors: XLR/TRS jack
Output Connectors: NL4
Amplifer Protection: S/C, O/C, thermal, infrasonic, ultrasonic, RF. Stable into reactive or mismatched loads.
Load Protection: On/off muting, DC-fault power-supply shutdown.
Width: 19″ (483mm)
Height: 2U
Depth: 379 mm
Weight: 9.5 kg
QSC PLX1804
The PLX1804 - 2 × 900 watts into 4 Ohms - is much the same as the PLX3102, but without filters or 2Ω capability (and we never drive 2Ω loads anyway).
Stereo (both channels driven)
8Ω FTC 20 Hz - 20 kHz 0.05% THD: 550W
8Ω EIA 1 kHz 0.1% THD : 600W
4Ω FTC 20 Hz - 20 kHz 0.05% THD: 800W
4Ω EIA 1 kHz 0.1% THD: 900W
Signal to Noise 20Hz - 20 kHz 0.05% THD: -106 dB
Input Sensitivity @ 8Ω: 1.20 Vrms
Voltage Gain @ 8Ω: 35 dB
Output Circuitry: 2-Step Class H
Power Requirements1: 4.7A
Distortion (SMTPE-IM): <0.02%
Distortion (typical)
1/8 rated power, 20 Hz - 20 kHz: <0.02%
Full rated power, 20 Hz - 20 kHz: <0.02%
Damping Factor: >200
Input impedance: 20kΩ Balanced
Input Clipping: 5.5 Vrms (+15 dBu)
Cooling: Variable-speed fan, rear to front airflow
Input Connectors: XLR/TRS jack
Output Connectors: NL4
Amplifer Protection: S/C, O/C, thermal, infrasonic, ultrasonic, RF. Stable into reactive or mismatched loads.
Load Protection: On/off muting, DC-fault power-supply shutdown.
Width: 19″ (483mm)
Height: 2U
Depth: 279 mm
Weight: 5.9 kg
QSC GX7
A more recent addition to the QSC stable, the lightweight GX7 (2 × 1,000 watts into 4 Ohms) has one of the highest power‑to‑weight ratios in the industry.
Stereo Mode
8Ω, both channels driven, 1 kHz: 725W
8Ω, single channel driven, 1 kHz: 800W
4Ω both channels driven, 1 kHz: 1,000W
4Ω, single channel driven, 1 kHz: 1,200W
Signal to Noise 20Hz - 20 kHz: -100 dB
Input Sensitivity: 1.2 Vrms
Voltage Gain @ 8Ω: 36.1 dB
Output Circuitry: 2-Step Class H
Power Requirements1: 5.1A
Distortion (typical)
1 kHz, 1 dB below rated power, 8Ω: <0.02%
1 kHz, 1 dB below rated power, 8Ω: <0.05%
Damping Factor: 100
Input impedance: >20kΩ Balanced
Maximum Input Level: 16 Vrms (+24 dBu)
Cooling: Variable-speed fan, rear to front airflow
Input Connectors: XLR/TRS jack/Phono
Output Connectors: NL4, 1/4", binding posts
Amplifer and Load Protection: S/C, O/C, thermal, RF. Load protected against DC faults.
Width: 19″ (483mm)
Height: 2U
Depth: 257 mm
Weight: 9.5 kg
Width: 19″ (483mm)
Height: 2U
Depth: 257 mm
Weight: 7.5 kg
- 1/8 power, pink noise @ 4Ω, 230V.