Yamaha PX3 8 Ohm 300W Channel Stereo Class D Amplifier

The versatile PX series power amplifiers lineup combines intelligent processing with high output power to meet the requirements of a vast range of sound reinforcement environments. 300W x 2 at 8 ohms / 500W x 2 at 4 ohms.

Key Features

• 2x 300W at 8 ohms
• 2x 500W at 4 ohms
• Newly developed Class-D amplifier engine with a custom LSI
• Flexible onboard PEQ, crossover, filters, delay, and limiter functions
• Yamaha Speaker presets
• Utlities for safe and secure operation

Technical Specifications

100V models
Output power; 1kHz Non-clip 20msec Burst Both channels driven
8 ohms:
300W x 2
4 ohms:
500W x 2
2 ohms:
300W x 2
8 ohms/Power Boost Mode:
600W x 1
4 ohms/Power Boost Mode:
1000W x 1
120V models
Output power; 1kHz Non-clip 20msec Burst Both channels driven
8 ohms:
300W x 2
4 ohms:
500W x 2
2 ohms:
300W x 2
8 ohms/Power Boost Mode:
600W x 1
4 ohms/Power Boost Mode:
1000W x 1
220V-240V models
Output power; 1kHz Non-clip 20msec Burst Both channels driven
8 ohms:
300W x 2
4 ohms:
500W x 2
2 ohms:
300W x 2
8 ohms/Power Boost Mode:
600W x 1
4 ohms/Power Boost Mode:
1000W x 1
Sampling frequency rate
Internal:
48kHz
A/D D/A Converters:
AD/DA: 24-bit linear, 128 times over sampling
Total harmonic distortion:
0.1% (1kHz, 10W), 0.3% (1kHz, Half power)
Frequency response:
±1.0dB (1W, 8 ohms, 20Hz to 20kHz)
S/N ratio:
100dB (A-weighted, 8 ohms, Gain setting = +14dBu)
Crosstalk:
Less than -60dB (Half Power, 8 ohms, 1kHz, Vol max input 150 ohms shunt)
Voltage Gain/Sensitivity
8 ohms 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)
8 ohms 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 impedance:
20k ohms (Balance), 10k ohms (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
Indicators:
POWER x1 (Green), ALERT x1 (Red), USB x1 (Green), PROTECT x2 (Red), CLIP/LIMIT x2 (Red), SIGNAL x2 (Green); Auto LED off feature
Processors:
Input 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)
Latency:
1.5 msec (Analog Input to Speakers)
Presets:
8 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 class:
Class D, Balanced output circuit (BTL)
Cooling:
16 step variable speed fan x 2, front to rear airflow
Power requirements:
Depending on area of purchase; 100V 50Hz/60Hz, 120V 60Hz, 220V-240V 50Hz/60Hz *Verified as operating at rated power voltage +/- 10% voltage.
Power consumption:
160W (1/8 MAX power, 4 ohms, Pink noise at all channels), 55W (4 ohms, Idling)
Dimensions W x H x D:
480mm (18-7/8") x 88mm (3-7/16"): 2U x 388mm (15-2/8")
Net weight:
6.9 kg (15.21 lbs)
Accessories:
USB cover, Owner's Manual, Specification sheet, AC cable (2.0m) x 1
Others:
Operating Temperature: 0 Degrees Celcius to +40 Degrees Celcius, Storage temperature: -20 Degrees Celcius to +60 Degrees Celcius