Yamaha P4500 Dual-Channel Amplifier (720 Watts x 2)

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Yamaha P4500 Dual-Channel Amplifier (720 Watts x 2)
zZounds Gear Experts Say...
Three output modes provide flexibility. Comprehensive protection. Yamaha's EEEengine.

The "P" Series provides the user with excellent cost per watt value, building on that cost performance with efficient power consumption. Utilizing Yamaha's new EEEngine technology, these amplifiers deliver outstanding sound quality with remarkable efficiency. All of this power and performance comes in a compact 2-space rack-mount size that makes installation and transport easy. If you need transparent amplification with excellent reliability and superior performance, give the new "P" Series a close look.

Power/Efficiency
Power rating for the P1600 is 230 watts per channel into 4 ohms. Yamaha's new EEEngine (Energy Efficient Engine) consumes power efficiently, which allows the amplifier to produce the same amount of output power with about half the input power required. The EEEngine outperforms other efficiency-enhancing schemes like drive voltage switching, pulse-width modulation and switching series regulators - without degrading sound quality.

Three Output Modes Provide Flexibility
In the normal stereo mode, separate input signals are routed to each channel with independent L/R signal control. An extra margin of flexibility is provided in parallel mode, which feeds a single input signal to both channels while maintaining independent L/R signal control. Bridged mono mode can be used for extra high power. The P1600 pumps out 460 watts in bridged mono, into 8-ohm loads.

Quality Sound
Transparent amplification without sound coloration is supplied with a frequency response… read more of 10Hz to 50 kHz. A high damping factor of >200 provides excellent bass response and total harmonic distrortion is
Comprehensive Protection
All 3 models offer comprehensive protection designed to prevent accidental damage to the amplifier itself and any connected speakers. Power ON muting suppresses the outputs until the amplifier circuitry has stabilized. To keep the operating temperature stable, all three models are equipped with ultra-quiet variable speed cooling fans. Added protection is supplied with heat oversink protection, noise filtering, a PC limiter for short circuit protection, and an attenuator security cover to protect level settings.

Input/Output
Input attenuators are 31-position, dB-calibrated and allow independent L/R adjustment with smooth, noise-free control. Balanced XLR jacks, a barrier strip and balanced 1/4 in. phone jacks accommodate input connections. Five-way binding posts provide solid, reliable speaker connections.

Yamaha's EEEengine
By means of switching drive system, Yamaha's EEEngine technology reduces AC power requirements and heat loss while maintaining output power and sound quality. Input power is supplied through a high-efficiency current buffer. During low requirement periods, it transparently switches the input power on and off automatically as needed. As the signal becomes large, an independently responding auxiliary power line supplies the additional power, as required. The output isn't compromised because the auxiliary power line is driven by the power supply voltage, that can maintain the maximum output to the speaker load. The amplifiers make more efficient use of the AC power than conventional amplifier technology. With EEEngine technology, the electric company will wonder how you're doing it. read less

P1600 P3200 P4500
Power Output Level 20Hz-20kHz THD+N=0.05% 8/Stereo 160W+160W 340W+340W 460W+460W
4/Stereo 200W+200 W 440W+440W 620W+620W
8/Bridge 400W 880W 1240W
1kHz
THD+N=0.05% 8/Stereo 175W+175W 370W+370W 520W+520W
4/Stereo 230W + 230W 520W + 520W 720W + 720W
8/Bridge 460W 1040W 1440W
1kHz, 20 ms, nonclip Stereo
RL=2 350W+350W
950W+950W 1300W+1300W
Power Bandwidth Half power 10Hz-40kHz (THD+N = 0.01%)
THD + N 20Hz-20kHz,
Half power 4-8/Stereo
8/Bridge 0.05%
Frequency Response 10Hz - 50kHz, +0, -1dB
Intermoduration Distortion 60Hz: 7kHz, 4:1, Half power 4-8/Stereo
8/Bridge 0.05%
Channel Separation Half power RL = 8
ATT. max input 600 shunt 65dB, 20Hz-20kHz
75dB, 1kHz
Residual Noise ATT. min 12.7kHz LPF
IHFA network - 75dB- 75dB
S/N Ratio 101dB 104dB 105dB
Damping Factor 200, RL = 8, f =1 kHz
Slew Rate 8 full swing Stereo
Bridge ± 30V / micro seconds
± 50V / micro seconds
Sensitivity (ATT. max.) +1.2dB +4.2dB +5.7dB
Voltage Gain (ATT max.) 32.1dB
Input Impedance 30k (Balance), 15k (Unbalance)
Controls Front panel POWER switch, Attenuator (31 position dB calibrated)
Rear panel MODE switch (STEREO/BRIDGE/PARALLEL)
Connectors Input Barrier strip terminal,XLR-3-31 type, 1/4 phone (balance)
Output 5 way binding post
Indicators POWER, TEMP (HEATSINK TEMP 85 ÁC), PROTECTION, CLIP X 2, SIGNAL X 2
Protection Circuits POWER switch on/off mute, DC detection, TEMP (heatsink temp 95 ÁC)
PC Limiter RL = 1
Fan Circuit Low speed (50 ÁC), variable, high speed (70 ÁC)
Power Requirements USA & Canadian models
European model
AT models 120V, 60Hz
230V, 50/60Hz
240V, 50/60 Hz
Power Consumption 200W / 250VA 400W / 500VA 500W / 650VA
Dimensions ( W x H x D) 18 7/8 x 4 1/16 x 17 15/16 in.
Panel height 88 mm; depth behind front panel 405.6mm
Weight: 26.5 lbs.

For support or warranty questions, please contact the manufacturer:
Phone: 714-522-9011
Web: https://usa.yamaha.com/support
OWNER'S MANUAL

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