(Based on 
Upgraded styling and specification with the exclusive ART pickup system.
The CPX series has always placed emphasis on playability, stylish medium jumbo body profile and cutting edge electronics. The Yamaha CPX700II-12 Medium-Jumbo 12-String Cutaway Acoustic-Electric Guitar offers upgraded cosmetics, solid Sitka spruce top, revamped A.R.T. preamp, and the same exceptional playability.
CPX Soundhole: Round
CPX’s conventional round soundhole focuses the midrange, while controlling bass, for a direct, powerful sound.
The more traditional CPX is great for any purpose – from acoustic use at home or in the studio to full- on stage performance. Powerful, musical acoustic tone and great playability sit perfectly with natural, controllable plugged-in sound while subtler new finishes stop short of APX’s modern looks but offer more personality than traditional acoustic guitars.
CPX Body Depth:
95 -115mm (3 3/4”- 4 1/2” )
With an exclusive Medium-jumbo body, CPX guitars boast powerful, rich bass combined with smooth, delicate highs and sweet mid-range for an open, modern voice. Non-scalloped X-type bracing ensures a powerful yet controlled tone that allows the guitar to deliver strong, rich acoustic sounds while still remaining clear and usable on-stage.
A.R.T. (Acoustic Resonance Transducer) technology
Yamaha electric acoustic guitars have consistently used piezo pickups to reproduce the pure sounds of the acoustic guitar. But piezo pickups tended to overreact to changes in attack, which in turn caused distortion. To achieve ideal playability, we had to improve the way that these dynamics were controlled.
To provide a solution to this issue, the new pickup was designed with a multilayer structure consisting of six layers of different materials. This dampens excessive vibration from the soundboard while picking up small resonances to achieve ideal sensitivity and outstanding dynamic balance. Also, because the pickup is fitted directly beneath the soundboard, it functions as a transducer attached to the body.
System 64
System 64 is an original preamp system newly designed and developed by Yamaha’s guitar development team. The 1-way system incorporates two contact pickups mounted inside of the body underneath the saddle. Best matching between guitar and pickup was obtained through numerous trials using a number of voice variations in order to produce the most authentic acoustic tone possible. The system is powered by easy to obtain AA-size batteries that provide a stable power supply for improved sound quality. The system also includes a high-precision tuner.
Based on 
