Yamaha A-670 Desktop Stereo Amplifier
- 1x Analog audio input (stereo)
- Subwoofer pre-out
- Headphone jack
- Control Cable input for standby & volume control with a CD-NT670
- 70 W + 70 W (6 ohms, 1 kHz, 10% THD)
- 5-way speaker binding posts (stereo)
Natural PWM type digital power amp, providing natural and high-grade sound
The A-670 is an amplifier that thoroughly performs the essential function of an amp, which is signal amplification, and ensures refined sound quality. In order to vividly portray everything from the delicate nuance of music to energy-filled dynamism, a digital power amp that creates high power and strong drivability with strong maximum output of 65 watts/channel, is built into the component. Natural PWM type digital modulation with an extremely simple circuit configuration provides both natural, uncoloured sound quality as well as high efficiency. And the low-pass filter of the latter part of the power amp, which significantly influences the sound quality, is a large coil made of low-loss, low-distortion OFC (oxygen-free copper) wire material. This simultaneously maintains the freshness of high-resolution sound sources, while enhancing the power of the bass and ensuring warmth in the mid and high frequency sounds—all to deliver the best quality sound reproduction, rich in musicality.
High sound quality parts preserve the purity of the sound
To prevent corrosion, all input and output jacks are gold-plated. High sound quality parts have been installed throughout, including the large gold plated terminals compatible with banana plugs for the speaker outputs, in order to preserve the purity of sound.
Subwoofer output for extra bass power
This premain amp also features a special output jack that allows you to directly connect a subwoofer to the amp-providing the extra impact of a powerful bass, and filling your room with even more dynamic sound.