All models

• Very light weight ("02" models, 21 lbs/9.5 kg, "04" models 13 lbs/5.9 kg).
• Cooling design exhausts hot air out the front, keeping the rack cool. Flow-through heat sinks require no filters that could become clogged.
• Front panel LED power, clip, -10 dB, and signal present indicators for system monitoring and troubleshooting. 02 models also feature bridge and parallel mode LED indicators.
• Speakon® NL-4 output connectors provide a positive-locking speaker connection. Ch 1 output uses all 4 wires for single-cable connection to bi-amplified speakers.
• 21-position front-panel gain controls for precise, repeatable amplifier adjustment.
• Balanced XLR inputs with parallel TRS connectors accommodate all common input connectors and support loop-through operation.
• Patented PowerLight power supply technology with other patents pending.

04 models

• Value combined with uncompromised PLX technology, quality and performance for applications that don't require bridged or 2 ohm stereo operation.
• Two models with power ratings up to 900 watts per channel @ 4 ohms.
• Clip limiting protects speakers; thermal limiting maintains operation even during abnormal overloads.

02 models

• Speakon® NL4 and binding post outputs.
• 100 Hz high pass and low pass filters for bi-amping subwoofer and satellite systems without the need for an external crossover.
• Switchable/defeatable 33 Hz infrasonic filters protect woofers from over-excursion damage.
• Switchable/defeatable clip limiters.
• Four models with power ratings up to 1800 watts per channel @ 2 ohms, 3600 watts bridged @ 4 ohms.

Watts per channel
	Stereo (per Kanal)			Mono (bridged)
	8 ohms	4 ohms	2 ohms	4 ohms
PLX1104	325	550	-	-
PLX1804	600	900	-	-
PLX1802	330	575	900	1800
PLX2502	450	750	1250	2500
PLX3102	600	1000	1550	3100
PLX3602	775	1250	1800	3600

 

Two ways to get PLX2 performance

The "02" models (PLX1802, PLX2502, PLX3102 and PLX3602) are the right choice for users who need to drive up to four loudspeakers from each amplifier channel (2 ohm loading), or when extremely high power bridge mono operation is required. These models feature built-in subwoofer processing, filter switches, and front panel indications of bridge mono status.

The compact "04" models (PLX1104, PLX1804) bring the same performance and technology, plus even greater value, to applications that don't require bridged or 2 ohm operation. Designed to power one or two speakers from each amplifier channel (4 ohm minimum loading), these models offer a simplified feature set while retaining genuine, uncompromised PLX performance and technology. Weighing just 13 pounds (5.9 kg) these "plug-and-play" amplifiers are perfect for ultra-portable rigs, as well as reference-quality playback.

Mechanical

PLX2 series amplifiers have the refined, rugged good looks usually associated with high performance racing cars, competition bikes, professional power tools, and high power machinery. A solid, cast-aluminum front panel adds professional style to any rack while also acting as an integral I-beam, rigidly tying the chassis together for years of on-the-road reliability.

Additional mechanical touches such as the side stiffening rails, rear rack ears and cable tie anchor points attest to QSC's years of experience and attention to detail. QSC has even designed the integrated front handles so the amplifier slides into a rack without scraping the installers fingers on the rack sides. The exterior appearance of PLX2 amplifiers conveys what's inside - simply and truly, 13 to 21 pounds of the most advanced professional power amp on the planet.

PowerLight Technology

PowerLight switchmode technology replaces a large, heavy AC transformer (typically 20 lbs. / 9 kg) with a highly efficient and lighter-weight active design. Conventional AC transformers provide 100 or 120 energy pulses per second, the PowerLight supply delivers 190,000 to 230,000 pulses per second. More pulses make it easier to provide on-demand power for the amplifier's output section. The power supply doesn't "sag" so bass notes stay full and powerful while the high end remains crisp and clean.

Audio Quality

PLX2 audio power circuitry achieves performance normally associated with studio reference amplifiers. In order to reduce crossover distortion, precision bias tracking makes minute adjustments as amplifier temperature changes. The benefit is cleaner high-frequency and more consistent sound no matter how hard the amplifier is driven. The higher power models use QSC-exclusive class H output circuitry, a form of audio "turbocharging" that increases maximum power without affecting the basic audio quality.

PLX2 04 Models: PLX1804 and PLX1104

The compact PLX1804 and PLX1104 bring the same performance and technology as the rest of the PLX2 Series, plus even greater value, to applications that don't require bridged or 2 ohm operation. Designed to power one or two speakers from each amplifier channel (4 ohm minimum loading), these models offer a simplified feature set while retaining genuine, uncompromised PLX performance and technology. Weighing just 13 pounds (5.9 kg), the "plug-and-play" PLX1804 and PLX1104 are perfect for ultra-portable rigs, as well as reference-quality playback.

PLX2 02 Models: PLX1802, PLX2502, PLX3102 and PLX3602

The PLX2 series is a range of premium quality, high-power amplifiers designed for the most demanding live performance uses. Built on the third generation of QSC PowerLight technology, PLX2 amplifiers combine light weight, superlative audio quality and proven QSC reliability.

The models PLX1802, PLX2502, PLX3102, PLX3602 are an excellent choice for users who need to drive up to four loudspeakers from each amplifier channel (2 ohm loading), or when extremely high power bridge mono operation is required. The PLX2 02 models feature built-in subwoofer processing, filter switches, and front panel indications of bridge mono status.

Model	Stereo Watts per channel			Bridged watts
PLX2	8 ohms*	4 ohms*	2 ohms**	4 ohms**
PLX 1104	325	550	-	-
PLX 1804	600	900	-	-
PLX 1802	330	575	900	1800
PLX 2502	450	750	1250	2500
PLX 3102	600	1000	1550	3100
PLX 3602	775	1250	1800	3600

 

• * 1 kHz, 0.1% THD, both channels driven
• ** 1 kHz, 1% THD, both channels driven

 

TECHNICAL DATA	PLX1802	PLX2502	PLX3102	PLX3602
	02 Modelle
	STEREO MODE, both channels driven *
8 Ohm FTC 20 Hz - 20 kHz 0.05% THD EIA 1 kHz 0.1% THD	320 W 330 W	425 W 450 W	550 W 600 W	725 W 775 W
4 Ohm FTC 20 Hz - 20 kHz 0.05% THD EIA 1 kHz 0.1% THD	525 W 575 W	675 W 750 W	900 W 1000 W	1100 W 1250 W
2 Ohm EIA 1 kHz 1% THD	900 W	1250 W	1550 W	1800 W
	BRIDGE MONO MODE *
8 Ohm 20 Hz-20 kHz 0.1% THD EIA 1 kHz 0.1% THD	1100 W 1200 W	1400 W 1500 W	1900 W 2100 W	2500 W 2600 W
4 Ohm 1 kHz 1% THD	1800 W	2500 W	3100 W	3600 W
Signal to Noise (20 Hz - 20 kHz)	-107 dB	-106 dB	-107 dB	-107 dB
Input sensitivity @ 8 Ohm	1.28 Vrms	1.15 Vrms	1.23 Vrms	1.25 Vrms
Gain @ 8 Ohm	32 dB	34 dB	35 dB	36 dB
Output Circuitry	AB	Class H 2-tier	Class H 2-tier	Class H 2-tier
Distortion(SMPTE-IM)	Less than 0.02%
Typical distortion  1/8 rated power, 20 Hz-20 kHz Full rated power, 20 Hz-20 kHz	Less than 0.02% Less than 0.02%
Frequency Reponse	20 Hz-20 kHz, -0.5 dB
Damping Factor	Greater than 500
Input Impedance	20k Ohm balanced  10k Ohm unbalanced
Input-Clipping	11 Vrms (+21 dBu)
Cooling	Variable speed fan
Input Connectors, each channel	3-pin XLR & 1/4" TRS balanced
Input Connectors, each channel	Neutrik® NL4 Speakon® and touch proof binding posts
Rear panel switches	Input Configuration: Bridge/Stereo/Parallel Clip-Limiter each channel Filter (pro channel): Top 100 Hz HPF/Full/Sub 100 Hz LPF & 33 Hz HPF/Full (Lowcutfilter)
Front Panel Controls	Detented Gain Attenuator: 0 to ∞ dB Power On/Off
Front Panel Indicators	Clip: Red LED -10: Green LED Signal (-35 dB): Green LED Power: Blue LED Parallel: Amber LED Bridge Mono: Amber LED
Amplifier Protection	Full short circuit, open circuit, thermal, infrasonic, untrasonic, and RF protection. Stable into reactive or mismatched loads
Load Protection	On/off Muting, DC fault power supply shutdown
Infrasonic	-3 dB, 5 Hz
DC fault	Power Supply Shutdown
Ultrasonic	-3 dB, 85 kHz
Short Circuit	Cutback
Thermal	Muting at 90° C
Over Current	Active Clip Limiting
High Line	Standard +15%, Maximal +25%
Low Line	-33%
Dimensions Height Width Depth  To rear panels	8.9 cm, 2 HE 19” 48.3 cm (19”) 32.6 cm 37.9 cm
Weight	9.5 kg net 11.8 kg shipping
Agency Approvals	CCC, CB, CE, FCC, KETI, cUL, UL

* CE Versions may have up to 12% (0,5dBw) less power due to special construction to meet EN61000 AC harmonic limits

Technical Data	PLX1104	PLX1804
	04 Models
8 Ohm Stereo FTC 20 Hz - 20 kHz 0.05% THD EIA 1 kHz 0.1% THD	310 W 325 W	550 W 600 W
4 Ohm Stereo   FTC 20 Hz - 20 kHz 0.05% THD EIA 1 kHz 0.1% THD	500 W 550 W	800 W 900 W
Signal to Noise (20 Hz - 20 kHz)	-106 dB	-106 dB
Input Sensitivity @ 8 Ohm	1.18 Vrms	1.20 Vrms
Gain @ 8 Ohm	32.5 dB	35 dB
Output Circuitry	AB	Class H 2-tier
Distortion (SMPTE-IM)	Less than 0.02%
Typical Distortion  1/8 rated power, 20 Hz-20 kHz Full rated power, 20 Hz-20 kHz	Less than 0.02% Less than 0.02%
Frequency Response	20 Hz-20 kHz, -0.5 dB
Damping Factor	Greater than 200
Input Impedance	20k Ohm balanced 10k Ohm unbalanced
Input clipping	5.5 Vrms (+15 dBu)
Cooling	Variable speed fan, rear to front air flow
Input connectors, each channel	3-pin XLR and 1/4 TRS balanced
Output connectors, each channel	Neutrik® NL4 Speakon®
Rear panel switches	Circuit Breaker
Front panel controls	Detented gain attenuator: 0 to ∞ dB Power On/Off
Fron panel indicators	Clip: Red LED -10: Green LED Signal (-35 dB): Green LED Power: Blue LED
Amplifier protection	Full short circuit, open circuit, thermal, ultrasonic, and RF protection.
Load protection	On/off Muting, DC fault power supply shutdown
Infrasonic	-3 dB, 8 Hz	-3 dB, 6 Hz
DC fault	Power supply shutdown
Ultrasonic	-3 dB, 120 kHz	-3 dB, 80 kHz
Short Circuit	Muting
Thermal	Limiting at 85° C, Muting at 90° C
Over current	Active Clip Limiting AC circuit breaker
High line	Standard +15%, Maximal +25%
Low line	-40%
Dimensions Height Width Depth	8.9 cm, 2 HE 19” 48.3 cm (19”) 22.7 cm 27.9 cm
Weight	5.9 kg net 8.2 kg shipping
Agency approvals	CCC, CB, CE, FCC, KETI, cUL, UL

* CE Versions may have up to 12% (0,5dBw) less power due to special construction to meet EN-61000 AC harmonic limits

• PLX Amplifier Series User Manual, multilingual (4175 kB)
• PLX Amplifier Series Spec Sheet, English (356 kB)
• PLX2 Series Amplfiers Review, FOH Magazine 06/2006, English (299 kB)
• PLX1804 CAD File (DXF) (529 kB)
• PLX2402 CAD File (DXF) (40 kB)
• PLX3102 CAD File (DXF) (614 kB)
• PLX3602 CAD File (DXF) (613 kB)
• PLX1802 CAD File (DXF) (614 kB)

Review of the PLX2 Series in FOH Magazine 06/2006. Read the Review (PDF 299 kB)

Amp Selector Tool: Which Amplifier Is Best For My Speakers?

To get the best sonic performance from your loudspeakers, QSC recommends that you power them with an amplifier that is rated for at least two times the loudspeaker's continuous power rating or equal to the loudspeaker's program power rating. This amplifier selector will help you choose a QSC amplifier that can provide maximum performance for even the most demanding audio program material.

• Use the online Version of the amp selector on qscaudio.com
• Download the offline version (v1.8, 30.11.2010). This version runs locally on your computer and does not require an Internet connection.