The Yamaha  XMV4140 power amplifier can operate in both high-impedance (70V/100V line) or low-impedance (4Ω/8Ω) modes simultaneously, eliminating the need for additional equipment, as well as streamlining the installation process.

Installed sound applications often demand both high and low impedance connectivity in the same venue, requiring separate, dedicated amplifiers or an external transformer. 

Model: XMV4140 Specifications
Output Power	1kHz, THD+N = 1% (20 ms Burst) 4Ω:140W x 4 8Ω:140W x 4 4Ω/ Double Power Mode:280W x 2 8Ω/ Double Power Mode:280W x 2
High impedance
100V line	125W x 4 / 80 Ω
70V line	125W x 4 / 40 Ω
Voltage Gain
RL=8Ω	28.7dB
RL=8Ω / Double Power Mode	31.7dB
100V	38.2dB
70V	35.2dB
Input Sensitivity
RL=8Ω	+4dBu
S/N Ratio
A-weighted	≥ 100dB
Power Consumption
1/8 power (4 Ω pink noise)	150W
Idle (4 Ω)	37W
Standby	18.5W
THD+N	1kHz, half power: ≤ 0.2%
Frequency Response	RL=8Ω, 100V/70V, Po=1W, 20Hz - 20kHz 0dB, ±1.0dB
Crosstalk	1kHz, half power, 8 Ω, Att. max, input 150 Ω shunt :≤ -60dB
Maximum Input Level	+24dBu
Input Impedance	20kΩ (balanced), 10k Ω (unbalanced)
Connectors
Analog Input	Euroblock x 2 (6P, balanced)
Digital Input / Output	RJ45 x 2 (YDIF IN / OUT)
Speaker Output	Barrier strip x 4 pairs
Network	RJ45 x 1
Remote, Fault Output	Euroblock (3P) x 1
AC IN	AC Inlet x 1
Protection circuit
Load Protection	POWER switch on/off: Output mute, DC-fault: Power supply shuts down, Clip limiting
Amplifier Protection	Thermal: Output mute (heatsink temp ≥90°C) (Restored automatically), Overcurrent: Output mute (Restored automatically), Low load impedance: Output mute (Restored automatically)
Power Supply Protection	Thermal: Amplifier shuts down automatically (heatsink temp ≥100°C) , Integrated power: Gain reduction (Restored automatically)
Cooling Fan	3-Speed fan x 2, front-to-back airflow
Power Requirements	100V, 120V, 230V-240V; 50Hz/60Hz
Dimensions
W	480mm (18.9")
H	88mm (3.5")
D	422mm (16.6")
Weight	8.1kg (17.9lbs)