Yamaha RX-V650 보충 설명서 - 페이지 38

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Created for audio purists, by audio purists.

Anyone familiar with the Yamaha name knows that we have always been dedicated to providing "natural

sound" in its truest sense — audio reproduction that sounds as close as possible to the real thing. Given our

success with other digital products and having the most advanced digital technology at hand, our engineers

decided to focus on creating a truly superb digital amplifier — one that would utilize the benefits of digital

technology without its drawbacks to deliver incredibly accurate and pure natural sound. The result is the

MX-D1. Prepare to be amazed and delighted.

MX-D1

Power Engine Chipset

To overcome the limitations of

conventional digital amplifiers, Yamaha

developed its own Power Engine chipset,

which enables the MX-D1 to achieve high

levels of sound

quality and power,

as well as low power

consumption and

YDA133 Modulator LSI and

compact size.

YDA134 Power MOS-FET Drive LSI

Constant Gain PLL Modulator Circuit

This circuit eliminates the dependency of

the output signal on power voltage

fluctuation by using the YDA133

modulator LSI, which combines a PLL

circuit with a modulator circuit.

Cross Feedback Loop Circuit

The digital pulse output is fed back by the

Cross Feedback Loop, improving the

linearity of the output stage and of the

modulator circuit. This achieves superior

low distortion characteristics and high

dynamic range.

Custom Installation Compatibility

Using the MX-D1 in a custom installation is facilitated by its RS-232C interface for bi-directional control, ID

setting for a multi-channel amplifier system and trigger in/out daisy chain connection for synchronized power

switching via Through and Power modes.

Stereo Digital Power Amplifier

Advanced Analog Feedback

The 352.8kHz carrier signal is removed by the

fc 30kHz output LC filter, and forwarded

negative feedback is added to achieve

amplification over a wide bandwidth of 100kHz

and with a high damping factor (over 200),

without load impedance dependency.

Active Power Control System

This system detects the output current to

control the voltage limiter value in order to

independently control the continuous

maximum output and dynamic power, making

it possible to continually provide maximum

performance.

Monaural Independent Construction

Separate chambers provide higher efficiency and

ensure that there is no chance of electronic

interference degrading performance.

Other Notable Features

High-Speed Protection Circuits

1/A

Direct Drive High-Efficiency Power Supply

and Magnetic Coupling Rectification Circuit

Highest Quality Parts and Extensive

Vibration Damping

LC filter of resonance point

Rl is more

Before Analog Feedback

RL is less

After Analog Feedback

-3dB

Frequency (Hz)

30kHz

100kHz

MX-D1 Main Specifications

[AUDIO SECTION] • Min. RMS Output Power (8

ohms , 1 kHz, 0.1% THD): 500 W + 500 W

• Dynamic Power/Channel (by IHF Dynamic

Headroom measuring method): 1,000 W (2 ohms) /

1,000 W (4 ohms) / 850 W (6 ohms) / 700 W (8

ohms) • Dynamic Headroom: 3 dB (4 ohms) / 2.3

dB (6 ohms) / 1.5 dB (8 ohms) • Damping Factor

(1 kHz, 8 ohms): 200 • Input Sensitivity/Impedance

(500 W/8 ohms, Unbalanced; Balanced): 1.3 V/25

k-ohms; 2.2 V/10 k-ohms • Frequency Response: 1

Hz-100 kHz ±3 dB • Total Harmonic Distortion

(Unbalanced; Balanced to Sp Out, 1 kHz, 10 W/8

ohms, 20 kHz LPF): 0.002% • Signal-to-Noise Ratio

(IHF-A-Network, Unbalanced/Balanced, S: 1.3 V,

Input Shorted, 20 kHz LPF): 120 dB • Residual

Noise (IHF-A-Network, Unbalanced/Balanced, 20

kHz LPF): 63 µV • Channel Separation (1 kHz,

Unbalanced/Balanced, Input 5.1 k-ohms Shorted):

100 dB • Muting: –

[GENERAL] • Standby Power Consumption: Less

than 0.1 W • Dimensions (W x H x D): 17-1/8" x

2-15/16" x 17-3/16" • Weight: 22.9 lbs.

YPC-

Passive Controller (Option)

The YPC-1, a Passive Controller unit,

provides input selection and volume control.

With a black finish that matches the MX-D1,

this unit is available as an option.

• -1dB (-100dB) gang error high quality

continuously variable attenuator with brass case

• Low-resistance rotary relector switch • Extra-

thick (1/2"), Aluminum-extruded, Yamaha

traditional piano finish front panel and side panels

• Point-controlled, anti-resonance feet • 9-7/16"

x 2-15/16" x 10-5/16" (W x H x D) • 7.5 lbs.