Yamaha PX3 Power Amplifier

The versatile Yamaha PX3 power amplifier combines intelligent processing with high output power to meet the requirements of a vast range of sound reinforcement environments. 300W x 2 at 8Ω / 500W x 2 at 4Ω. 

FEATURES:

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

SPECIFICATION:

General

• Internal Sampling Frequency Rate: 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, 8Ω, 20Hz to 20kHz)
• S/N ratio: 100dB (A-weighted, 8Ω, Gain setting = +14dBu)
• Crosstalk: Less than -60dB (Half Power, 8Ω, 1kHz, Vol max input 150Ω 

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 Impedance: 20kΩ (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

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, 4Ω, Pink noise at all channels), 55W (4Ω, Idling)

Physical & Dimensions

• Height: 88mm 
• Width: 480mm
• Depth: 388mm
• Weight: 6.9kg

Manufacturer: Yamaha