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About this product
Overview & specifications
The Yamaha PX5 Power Amplifier is a two-channel Class-D amp for the engineer who wants the speaker processing built into the rack rather than bolted on as a separate box. It delivers 500 watts a side into 8 ohms and 800 watts a side into 4 ohms, with crossover, EQ, delay and limiting handled on board. In a plain black two-unit chassis weighing 6.9 kilograms, it is the piece that turns a pair of passive cabinets into a tuned system.
500 watts a side into 8 ohms, 800 into 4
Each channel puts out 500 watts into 8 ohms or 800 watts into 4 ohms. Bridge the pair in Power Boost mode and you get a single channel of 800 watts into 8 ohms or 1,400 watts into 4 ohms for driving a sub. The output stage is Class D with a balanced BTL circuit, frequency response is flat within 1 dB from 20 Hz to 20 kHz, and the signal-to-noise ratio is 100 dB A-weighted.
D-CONTOUR and a full speaker processor
Yamaha's D-CONTOUR multi-band dynamic processing sits on the inputs with FOH/MAIN, MONITOR and OFF settings, shaping the low end differently depending on whether the cabinet is out front or on the floor as a wedge. Behind it is a proper speaker processor with a 6-band parametric EQ, a limiter and delay, plus high-pass and low-pass filters adjustable from 20 Hz to 20 kHz with polarity control. Delay runs from 0 to 74 milliseconds and total latency from analogue input to speaker is 1.5 milliseconds.
Presets for Yamaha passive cabinets
Factory presets are loaded for Yamaha's passive speakers, so a CBR, Club or VXS/VXC box gets the right crossover, EQ and limiting without you measuring anything. There are eight user preset slots on top of that for your own rigs. The over-voltage limiter can be configured by wattage or by speaker preset, which keeps a cheaper cabinet safe when it is hanging off an amp this size.
Connections and gain settings
Outputs are two Neutrik speakON NL4 sockets, two pairs of binding posts and two quarter-inch TS jacks, so it wires into anything from a touring loom to a bar install. Input impedance is 20 kilohms balanced or 10 kilohms unbalanced, maximum input is +24 dBu, and gain can be set to 32 dB, 26 dB, +4 dBu or +14 dBu sensitivity to match whatever mixer or DSP is feeding it.
Protection, cooling and status at a glance
Thermal, over-voltage and over-current faults shut the power supply down, while a DC fault holds it off until you intervene, so a failed driver does not take the amp with it. Two 16-step variable-speed fans push air front to rear and stay quiet at low load. Front-panel LEDs show power, alert, USB, protect, clip/limit and signal per channel, with an auto LED-off feature for dark stages. Power draw is 55 watts idling and 230 watts at one-eighth power, and a 2-metre AC cable and USB cover come in the box.
Specifications
The finer details
Specifications
| Brand | Yamaha |
|---|---|
| Model | PX5 |
| Included | USB cover, Owner's Manual, Specification sheet, AC cable (2.0m) x 1 |
| Strings | Operating Temperature: 0°C to +40°C, Storage temperature: -20°C to +60°C |
| 100V models | 1000W x 2 |
| 2Ω | 500W x 2 |
| 8Ω/Power Boost Mode | 800W x 1 |
| 4Ω/Power Boost Mode | 1400W x 1 |
| 120V models | 1000W x 2 |
| 220V-240V models | 1000W x 2 |
| 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 shunt) |
| Voltage Gain/Sensitivity | 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 | Neutrik speakON NL4 x2, Binding post x2 pairs, 1/4" PHONE(TS) x2 |
| Indicators | POWER x1 (Green), ALERT x1 (Red), USB x1 (Green), PROTECT x2 (Red), CLIP/LIMIT x2 (Red), SIGNAL x2 (Green); Auto LED off feature |
| Latency | 1.5 msec (Analog Input to Speakers) |
| Presets | 8 user amplifier presets (Factory preset: Speaker presets for Yamaha passive speakers) |
| 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 | 230W (1/8 MAX power, 4Ω, Pink noise at all channels), 55W (4Ω, Idling) |
| Dimensions | 480mm (18-7/8") |
| Net weight | 6.9 kg (15.21 lbs) |
| Colour | Power Amplifier |