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The Yamaha PX3 Stereo Power Amplifier delivers 300W at 8 Ohms in a lightweight chassis and is suitable for a wide variety of sound-reinforcement applications. Part of the company's PX Series of power amplifiers, it features a Class-D engine with a single custom LSI chip, and uses PLL technology for higher efficiency and lower noise. The Power-Boost mode combines the power output from two channels into one, achieving significantly higher single-channel power levels (the number of channels available is then halved).
The on-board DSP functions include a PEQ, a delay, a crossover, and a limiter. They also allow for detailed configuration of parameters such as input & output routing, input sensitivity, amp gain, and speaker impedance. The D-Control multi-band dynamic processor delivers a clear and consistent sound at any output level by shaping the frequency response of each speaker for either front-of-house or monitor configurations.
The Configuration Wizard helps save time during setup by assigning optimized speaker settings that match your system configuration. It can be used in basic mode for quick setup or advanced mode for more precise control over DSP parameters. You can store up to eight presets, which can be saved to a USB drive for use with other amplifiers and setups.
For secure operation, the panel-locking function ensures that your settings remain safe. With its sturdy frame and carrying handle, the PX3 is built to withstand extended road use.
Class-D amplifier engine with single custom LSI chip and PLL technology
Power Boost Mode combines the power output from two channels into one
Configuration Wizard allows for configuration of the system by assigning optimized speaker settings which can be saved as presets
Digital routing of inputs & output (dual, parallel, single & SUM)
DSP functions include PEQ, crossover, filters, delay & limiter, accessed via an LCD display
D-Contour multi-band dynamic processing shapes the frequency response of speakers for specific applications
Basic mode for quick setup and Advanced mode for more precise control
Flexible connectivity with XLR & 1/4" TRS inputs and binding post, SpeakON & 1/4" TS outputs
Presets can be saved to USB drive for use with other amplifiers and setups
Panel-locking function to keep settings safe
Two 16-step variable-speed fans
In the Box
Yamaha PX3 Stereo Power Amplifier (300W at 8 Ohms)
AC Power Cord
Limited 3-Year Warranty
Table of Contents
300 W per channel at 8 Ohms
500 W per channel at 4 Ohms
300 W per channel at 2 Ohms
600 W one channel at 8 Ohms / Power Boost Mode
1000 W one channel at 4 Ohms / Power Boost Mode
Class-D, balanced output circuit (BLT)
THD + N
0.1% at 1 kHz, 10 W
0.3% at 1 kHz, half power
20 Hz to 20 kHz, ±1.0 dB (1 W at 8 Ohms)
≤ -60 dB
Voltage Gain / Sensitivity
At 8 Ohms, Maximum Volume:
32.0 dB / +4.1 dBu (Gain Setting: 32 dB)
26.0 dB / +10.1 dBu (Gain Setting: 26 dB)
32.1 dB / +4 dBu (Gain Setting: 4 dB)
22.1 dB / +14 dBu (Gain Setting: 14 dB)
At 8 Ohms, Maximum Volume, Power Boost Mode:
35.0 dB / +4.1 dBu (Gain Setting: 32 dB)
29.0 dB / +10.1 dBu (Gain Setting: 26 dB)
35.1 dB / +4 dBu (Gain Setting: 4 dB)
25.1 dB / +14 dBu (Gain Setting: 14 dB)
2 x 16-step variable-speed fan (front-to-rear flow)
Maximum Input Voltage
20 kOhms (Balanced)
10 kOhms (Unbalanced)
A/D: 24-bit linear, 128 times over-sampling
D/A: 24-bit linear, 128 times over-sampling
D-contour: FOH / MAIN
Delay: 0 to 74 ms
HPF / LPF: cutoff frequency 20 Hz to 20 kHz with polarity control
Speaker Processor: 6-band PEQ / limiter / delay
1.5 ms (analog input to speaker)
8 user presets
Speaker presets for Yamaha passive speakers
2 x XLR-3-31
2 x 1/4 TRS
2 x Neutrik SpeakOn NL4
2 x pairs of binding posts
2 x 1/4" TS
1 x AC inlet with AC cord clamp
1 x USB 2.0 type-A (female)
AC Power Requirements
120 V / 60 Hz
160 W at 4 Ohms, 1/8 maximum power
55 W at 4 Ohms, Idle