QSC Audio PL6.0II, PL3.8x, PL3.4, PL4.0 User Manual
With an unequaled reputation for sound quality
and reliability, the PowerLight® Series is a range
of advanced-technology professional audio amplifiers
designed for touring professionals. PowerLights
feature QSC’s exclusive PowerLight technology
for extraordinary audio performance, reliability
and reduced weight. Four models offer a range of power
from 725 to 3,500 watts per channel, allowing you to
choose the right power for your special application.
With PowerLight technology, PowerLight amplifiers take
your sound to a whole new level. Not only does it
give you tighter bass and clean transparent highs,
PowerLight also cuts waste heat and boosts reliability.
PowerLight is a revolutionary switching power supply
technology that provides ample current to the audio
power circuitry by charging the supply rails 230,000
times a second though an ultra-low impedance circuit.
So unlike amplifiers that use conventional supplies, the
audio signal is never starved prematurely and remains
crisp and clean.
PowerLight Series
Professional Power Amplifiers
PL3.4 | PL3.8x | PL4.0 | PL6.0II
Features
PowerLight Series amplifiers also boast a set of useful
features. Individually selectable clip limiters lower
distortion and protect speakers, and a standby mode
allows remote AC control.
PowerLight Power Amplifiers
Watts per channel
Model 8Ω 4Ω 2Ω*
PL3.4 725 1150 1700
PL3.8x Ch 1 900 1400 2400
PL3.8x Ch 2 450 800 1400
PL4.0 900 1400 2000
PL6.0II 1150 2050 3500
20 Hz – 20 kHz, 0.1% THD *1 kHz, 1% THD
PowerLight is a registered trademark of QSC Audio Products, Inc.
• PowerLight switching technology—for improved audio performance
• High efficiency, Class H linear output circuit lowers AC current consumption
and cooling requirements by 40% or more (on selected models)
• DataPort for remote computer control
• User defeatable clip limiter reduces distortion, protects speakers
• Advanced thermal management system for superior cooling
• Detented gain controls with 2 dB steps for easy resetting
• Comprehensive LED status arrays
• Variable speed fan for quiet operation
• Remote AC power control
• DC, subsonic audio, and thermal overload protection
• Neutrik “Combo” (XLR & 1/4") and barrier balanced input connectors
• 3 year warranty plus optional 3 year extended service contract
PowerLight Series
PL3.4 PL3.8x PL4.0 PL6.0II
Stereo Mode (both channels driven) Continuous average output power per channel
Ch 1 Ch 2
8Ω / FTC 20 Hz - 20 kHz / 0.1% THD 725 W 900 W 450 W 900 W 1150 W
8Ω / EIA 1 kHz / 0.1% THD 750 W − − 1000 W 1300 W
4Ω / FTC 20 Hz - 20 kHz / 0.1% THD 1150 W 1400 W 800 W 1400 W 2050 W
4Ω / EIA 1 kHz / 0.1% THD 1225 W − − 1600 W 2200 W
2Ω / EIA 1 kHz / 1% THD 1700 W 2400 W 1400 W 2000 W 3500 W
Bridge Mono Mode
8Ω / FTC 20 Hz - 20 kHz / 0.1% THD 2300 W − 2800 W 4400 W
4Ω / EIA 1 kHz / 1% THD 3400 W − 4000 W 7000 W
Distortion (SMPTE-IM) < 0.05% < 0.01% < 0.05% < 0.02%
THD (typical)
below rated power. 1.0 kHz and below. full rated power
Damping Factor (1 kHz and below) > 500 > 500 > 500 > 2000
Signal to Noise (20 Hz - 20 kHz) 108 dB 105 dB 105 dB 107 dB
Input Sensitivity at 8
Voltage Gain 80x (38 dB) 80x (38 dB) 49x (34 dB) 80x (38 dB) 40x (32 dB)
Output Circuitry Class H (3-tier) Class H (3-tier) Class H (2-tier) Class H (3-tier) Class H (4-tier)
Cooling (Variable speed fans, rear-to-front air flow) Single fan Single fan Single fan Four fans
Weight (net) 30 lbs (13.6 kg) 30 lbs (13.6 kg) 30 lbs (13.6 kg) 53 lbs (24 kg)
120 V Current Consumption 11.5 A 15.2 A 15.2 A 16 A
(1/8 Power Pink Noise at 4
Multiply current by 0.5 for 230 V units
Connectors (each channel) Input: Neutrik “Combo” XLR + 1/4" / TRS input and barrier strip Output: “Touch proof” binding posts
Frequency Response 20 Hz – 20 kHz / ±0.15 dB
PL 6.0II: 2 Hz - 50 kHz / +0, -3 dB
PL3.4 and PL4.0: 5 Hz – 60 kHz / +0, -3 dB
PL3.8: 8 Hz – 100 kHz / +0, -3 dB
Input Impedance 10k ohm unbalanced / 20k ohm balanced
Amplifier Protection Full short circuit, open circuit, thermal, ultrasonic, RF protection. Stable into reactive or mismatched loads
Controls Front: AC switch / Ch.1 and Ch.2 gain knobs / Ch.1 and Ch.2 clip limiter switches
Rear: Parallel - Stereo - Bridge switch / Remote AC Control terminal strip
Load Protection On/off muting / DC-fault power supply shutdown
Indicators Prot: Red LED / Standby: Yellow LED / Power- On: Green LED /
Clip: Red LED / Signal: Green LED / Level -10 dB: Yellow LED / Level -20 dB: Yellow LED (each channel)
Power Requirements 120 / 230 Vac / 50 - 60 Hz
Power Connectors 30 A twist lock (PL3.8x, PL4.0, PL6.0II) / 15 A edison (PL3.4)
Export versions have removable IEC connectors
Dimensions 19.0" (48.3 cm) rack mounting (all models) / 17.9" (45.5 cm) deep behind front mounting rails (all models)
Overall depth on PL 6.0
* at 0.2% THD; ** EIA 1.0% THD 1 kHz
4Ω to 8Ω 20 Hz - 20 kHz, 10 dB 0.01% 0.01% 0.01% 0.06%
Ω 0.96 1.08 1.24 1.06 2.40
Ω)
II 19.5" Height: 5.25" (13.3 cm) 3 RU
Specifications
Specifications subject to change without notice.
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
PowerLight Spec Sheet 02/08/06
qscaudio.com
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