YAMAHA PX8 เครื่องขยายเสียง 2x 800W at 8Ω, 2x 1050W at 4Ω, Class-D amplifier, PEQ, crossover, filters, delay, and limiter functions, 2U
2x 800W at 8Ω
2x 1050W at 4Ω
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
Specs.
100V models
Output power; 1kHz Non-clip 20msec Burst Both channels driven 8Ω 800W x 2
4Ω 1050W x 2
2Ω 600W x 2
120V models
Output power; 1kHz Non-clip 20msec Burst Both channels driven 8Ω 800W x 2
4Ω 1050W x 2
2Ω 600W x 2
220V-240V models
Output power; 1kHz Non-clip 20msec Burst Both channels driven 8Ω 800W x 2
4Ω 1050W x 2
2Ω 600W x 2
General specifications
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, 8Ω, 20Hz to 20kHz)
S/N ratio 101dB (A-weighted, 8Ω, Gain setting = +14dBu)
Crosstalk Less than -60dB (Half Power, 8Ω, 1kHz, Vol max input 150Ω shunt)
Voltage Gain/Sensitivity 8Ω Volume max 32.0dB/+8.3dBu (Gain setting: 32dB), 26.0dB/+14.3dBu (Gain setting: 26dB), 36.3dB/+4dBu (Gain setting: +4dBu), 26.3dB/+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 280W (1/8 MAX power, 4Ω, Pink noise at all channels), 60W (4Ω, Idling)
Dimensions W 480mm (18-7/8")
H 88mm (3-7/16"): 2U
D 388mm (15-2/8")
Net weight 7.2 kg (15.87 lbs)
Accessories USB cover, Owner's Manual, Specification sheet, AC cable (2.0m) x 1
Others Operating Temperature: 0°C to +40°C, Storage temperature: -20°C to +60°C
