Crafted with a revolutionary body design, the 
RGX A2  is perhaps the most comfortable guitar I've ever strapped on. Weighing  in at a ghostly five pounds, six ounces, it's easier on the shoulder  than my winter coat. It has amazing resonance that translates into  endless sustain, and it sports some very futuristic cosmetic and  functional enhancements. A low-mid price tag and never-failing Yamaha  precision craftsmanship make it a hell of an axe that's within reach for  almost any serious player.
 
Get up, stand up!
Call me a wimp, but lately I do most of my practicing sitting down.  I've even been tempted to sit down at gigs (though propriety has  prevented me). The problem is a nagging pain in the shoulder from that  nine pounds of wood and metal hanging there. I keep fit but, even so,  decades of enduring guitar drag have only made me more sensitive. That's  why this 
RGX A2 was such a breath of fresh air. It practically floated up out of the case and danced in my hands.
 I immediately strapped it on and was truly inspired by its vibrant  resonance. I played it acoustically for ten minutes before plugging in.  It was immediately obvious that this is one of those rare instruments  that really brings the music out of me. And after standing around  playing it for over an hour . . . miracle of miracles, no shoulder pain!  Wahoo!
 
A.I.R.-borne tone
 Yamaha calls their new design an Alternative Internal Resonance body.  Though they're secretive with the details, it's apparently a very  heavily routed, essentially semi-hollow design using a super-resonant  tone wood with a high-tech synthetic top. Both the top and back are  radiused so there are no hard edges digging into your ribs or forearm.
As I hoped, that lively acoustic resonance translated into miles of  smooth sustain when I plugged into my half stack and cranked 'er up to  11. The Yamaha alnico soapbar humbuckers not only look cool, they sound  cool. Designed for modern sounds with lots of higher harmonic sparkle,  they crank out bold bass and a slightly attenuated midrange. They even  passed my acid-test-for-tone with flying colors when I switched to the  clean channel, dialed off the treble, and got into some serious jazz  riffs. The tone was full-bodied and bold with no boominess or muffled  sound. Bravo!
 
Operational excellence
Looking at the back of the 
RGX A2,  I noticed a 9V battery compartment and thought at first it must have  active electronics. But I took the battery out and the guitar worked  fine. The battery just powers green and blue LEDs on either side of the  recessed translucent surround for the volume knob--a very cool cosmetic  touch.
What looks like the tone knob is, in fact, a three-position pickup  selector. When the bridge pickup is selected, a blue LED illuminates the  bridge side of the knob surround. When both pickups are selected the  blue light is joined by a green one on the neck side. The green light  illuminates alone when the forward pickup is selected. This makes for an  eerie look on a dark stage and is also handy for knowing at a glance  which pickups are activated. The absence of a tone knob can be easily  compensated for by using the tone controls on your amp.
The 
RGX A2's  cylindrical die-cast tuners feel ultrastable. And you don't have to  worry about them going out of tune if bumped. The unique Yamaha  string-through-body bridge is definitely the best-looking design I've  seen. It features individual saddles that are fully adjustable for  height and intonation without having all their screws and springs  hanging out. They make most other bridges look inside out.
 The rosewood fretboard on a bolt-on maple neck with a tight joint  features large frets for easier runs and silky feel. This one was set up  perfectly when I got it and the action was super-low with minimal  buzzing.
 
Lavish looks
The design lines on the top; white soapbar pickups; white finish with gray back; and two-tone, 3-D headstock give the 
RGX A2  modern, high-tech visual appeal. The lighted volume-knob surround;  futuristic tuners, knobs, and bridge; and smooth saddles complete the  effect, making this guitar a true knockout to behold.
 On its Lank report card, I give the 
RGX A2  an "A" for tone, "A" for playability, "A" for looks, "A+" for value,  and extra credit for incredibly light comfort. Mikey definitely likes  it!
 
Sidebar:
 - Alternative Internal Resonance body
 
- Bolt-on maple neck
 
- Rosewood fretboard
 
- Dual Yamaha alnico soapbar humbuckers
 
- Die-cast cylindrical tuners
 
- Die-cast volume and pickup selector knobs
 
- LEDs on volume knob surround
 
- White/aircraft gray finish
 
- 25-1/2" scale
 
- 5 lbs., 6 oz.
 
Bass player? Read: 
Yamaha RBX4 A2 Four-String Electric Bass Guitar Review
By Mikey Lank
MusiciansFriend.com