With the linear 16-bit single DAC device, the independent left and right digital filters had an irregular configuration. It also featured a powerful power supply unit with even lower impedance and variable output allowing remote control operation, and electric analog volume control with direct connection to the power amplifier. In addition to the VM Stabilizer, a copper-plated steel plate attached to the back of the audio board and developed based on the VMA vibration modulation analysis method to determine the effects of vibrations during CD playback on sound quality, its features like a double bottom structure and cast iron heavy insulator gave it a high frame rigidity that helped produce a clear sound image and massive bass. Standardizing the basic platform with a focus on the control system, this model led to the establishment of a rational approach to further raising the design quality of high end CD Players. This was a high grade unit that was the first to incorporate Yamaha’s two original LSIs and played a major role in the development of the high performance, low cost CD Player. Apart from the mini-component body size and omission of a 10-key pad it was functionally comparable to a high-end model and contributed heavily to the explosive popularity and market expansion of the CD.
The linear 16-bit DAC device became Yamaha’s first ladder type (single). With one-chip digital filtering and up to two times oversampling, the latter in particular achieved better sound quality and reliability while simultaneously reducing the cost.
One of the LSIs was the YM3511 for servo-control, and the other was the YM2201 for digital signal demodulation and processing. The CD-X1 featured two original LSIs developed and manufactured in-house, significantly reducing the total number of parts in the player to about one-third the conventional amount and becoming Yamaha’s trump card in offering the lowest price in the industry.
The first CD Player to sell for under 100,000 yen, a major benchmark on the road to full-scale commercial acceptance, was the CD-X1, introduced in 1983 for 99,800 yen.
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The main reason was that the hardware and software were still expensive. Nevertheless the CD-1a became a long-selling item, Yamaha’s flagship product for three years.Īfter initially generating tremendous expectations, the CD went into a slump once the first wave of demand had passed. Lasting only one year, the original CD-1 was short-lived, but with CD still in its early stages of development this shows that both manufacturers and consumers were still struggling with the new technology. In terms of sound quality, the DAC device and low-pass filter (still a high grade analog filter rather than a digital filter at the time) were reworked, delivering Yamaha’s characteristic richly musical expressiveness and helping to change people’s preconceptions that "CD sound has no personality." In terms of its functions, the electric opener’s key tray and sub-display for memory play usage, major features of the original CD-1, had been removed, and in response to the demands of the market the new unit now featured 10 keys, a headphone jack and a new look for the display panel. Maintaining all the good points of the CD-1 that had earned it such a good reputation, its degree of perfection was raised with improved stability and reliability of operation, common problems for manufacturers of the earliest CD Players. The CD-1a was introduced in 1983 as an upgraded version of the CD-1.
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