Yamaha PX3 Dual Channel Power Amplifier

Part of Yamaha’s PX series, the PX3 is a dual channel power amplifier designed for a wide range of sound reinforcement applications.

This amp is equipped with Power Boost Mode, which combines the power output from two channels into one so you can enjoy higher single-channel power levels to drive high power handling speakers as necessary (the number of channels available is halved).

Yamaha PX3 Features

• Dual Channel Power Amplifier
• Designed for a wide range of sound reinforcement applications
• Set up your sound effortlessly, without the need for outboard gear
• Newly developed Class-D amplifier engine with a custom LSI
• Flexible onboard PEQ, crossover, filters, delay, and limiter functions
• Utilities for safe and secure operation
• 2x 300W at 8Ω
• 2x 500W at 4Ω
• Yamaha Speaker presets

• PX3 Dual Channel Power Amplifier1
• USB cover1
• Owner's Manual1
• Specification sheet1
• AC cable (2.0m)1

• 100V models (Output power; 1kHz Non-clip 20msec Burst Both channels driven)
  • 8Ω: 300Wx2
  • 4Ω: 500Wx2
  • 2Ω: 300Wx2
  • 8Ω/Power Boost Mode: 600Wx1
  • 4Ω/Power Boost Mode:1000Wx1
• 120V models (Output power; 1kHz Non-clip 20msec Burst Both channels driven
  • 8Ω: 300Wx2
  • 4Ω: 500Wx2
  • 2Ω: 300Wx2
  • 8Ω/Power Boost Mode: 600Wx1
  • 4Ω/Power Boost Mode:1000Wx1
• 220V-240V models (Output power; 1kHz Non-clip 20msec Burst Both channels driven)
  • 8Ω: 300Wx2
  • 4Ω: 500Wx2
  • 2Ω: 300Wx2
  • 8Ω/Power Boost Mode: 600Wx1
  • 4Ω/Power Boost Mode:1000Wx1
• Sampling frequency rate (Internal)48kHz
• A/D D/A ConvertersAD/DA: 24-bit linear, 128 times over sampling
• Total harmonic distortion0.1% (1kHz, 10W), 0.3% (1kHz, Half power)
• Frequency response±1.0dB (1W, 8Ω, 20Hz to 20kHz)
• S/N Ratio100dB (A-weighted, 8Ω, Gain setting = +14dBu)
• CrosstalkLess than -60dB (Half Power, 8Ω, 1kHz, Vol max input 150Ω shunt)
• Voltage Gain/Sensitivity
  • 8Ω Volume max: 32.0dB/+4.1dBu (Gain setting: 32dB), 26.0dB/+10.1dBu (Gain setting: 26dB), 32.1dB/+4dBu (Gain setting: +4dBu), 22.1dB/+14dBu (Gain setting: +14dBu)
  • 8Ω Volume max /Power Boost mode: 35.0dB/+4.1dBu (Gain setting: 32dB), 29.0dB/+10.1dBu (Gain setting: 26dB), 35.1dB/+4dBu (Gain setting: +4dBu), 25.1dB/+14dBu (Gain setting: +14dBu)
• Maximum input voltage+24dBu
• Input impedance20kΩ (Balance), 10kΩ (Unbalance)
• I/O Connectors
  • Speaker output ports: Neutrik speakON NL4 x2, Binding post x2 pairs, 1/4" PHONE(TS) x2
  • Line Input: XLR-3-31 x2, 1/4 "PHONE(TRS) x2
  • Others: USB 2.0 Standard-A Connector (Female) for Save/Load, Speaker preset update, Firmware update with USB memory; AC inlet x1 with AC cord clamp
• IndicatorsPOWER x1 (Green), ALERT x1 (Red), USB x1 (Green), PROTECT x2 (Red), CLIP/LIMIT x2 (Red), SIGNAL x2 (Green); Auto LED off feature
• ProcessorsInput summing; D-CONTOUR(FOH/MAIN, MONITOR, OFF); Delay(0 - 74msec); HPF/LPF(cutoff frequency 20Hz~20kHz with polarity control); Speaker Processor(6 band PEQ + Limiter + Delay)
• Latency1.5 msec (Analog Input to Speakers)
• Presets8 user amplifier presets (Factory preset: Speaker presets for Yamaha passive speakers)
• Protection circuit
  • Load protection : POWER switch on/off: Output mute; Output voltage protection: Over voltage limiter, user configurable by wattage and speaker preset; DC-fault: Power Supply shutdown (NOT restored automatically)
  • Amplifier protection : Thermal: Output limiter (Restored automatically) → Output mute (Restored automatically); Over current: Output mute (Restored automatically); Over voltage: Output limiter (Restored automatically); Integrated Power Limit: Output limiter (Restored automatically)
  • Power supply protection : Thermal: Output limiter (Restored automatically) → Power supply shutdown; Over voltage: Power supply shutdown; Over current: Power supply shutdown
• Amplifier classClass D, Balanced output circuit (BTL)
• Cooling16 step variable speed fan x 2, front to rear airflow
• Power requirementsDepending on area of purchase; 100V 50Hz/60Hz, 120V 60Hz, 220V-240V 50Hz/60Hz *Verified as operating at rated power voltage +/- 10% voltage.
• Power consumption160W (1/8 MAX power, 4Ω, Pink noise at all channels), 55W (4Ω, Idling)
• Dimensions (WxHxD)18-7/8 x 3-7/16 (2U) x 15-2/8 inches (480 x 88 x 388mm)
• Net weight15.21 lbs (6.9 kg)
• Operating Temperature 0°C to +40°C
• Storage Temperature-20°C to +60°C

More about Yamaha's PX Power Amplifiers

Low noise, reliable protection, and outstanding sound make the PX Series from Yamaha the ideal power amplifiers for sound reinforcement and installations. These power amps deliver maximum output power to speakers, while their intelligent processing functionality protects the signal quality.

PX offers flexible onboard crossover, filters, delay, limiter and PEQ (fixed preset) functions. Amp Mode lets you easily configure the system by selecting the input and output routing of up to 15 pattern types. Choose from two setup modes depending on your application’s needs or your operator’s experience level: Basic is great for novices, while Advanced is ideal for users who want precise control over every part of their sound. Eight programmable presets allow instant recall that can be saved to a USB thumb drive and shared with other PX units.

Save even more setup time with PX’s built-in Config Wizard. Select the appropriate filter and crossover for each speaker, and this tool will automatically optimize speaker settings that match your configuration. Config Wizard also features presets for each of Yamaha’s passive speaker series (such as CBR, Club, Installation, and VXS/VXC series). An advanced mode allows more detailed configuration of parameters such as input routing, input sensitivity, amp gain, and speaker impedance.

The PX Series boasts a Class-D amplifier engine that features a single-chip architecture that concentrates all the necessary functions into a single custom LSI chip. The engine’s PLL technology controls transfer characteristics in real time. Yamaha’s intelligent D-CONTOUR multi-band dynamic processing enables consistent clarity and high-quality sound for either front-of-house or monitor configurations.