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