Digital Pianos Review
Yamaha DGX-670 Review: The Arranger With a Real Piano Inside
The DGX-670 is Yamaha's portable arranger piano: 88 GHS keys, the CFX concert grand sample, 630 voices, 263 accompaniment styles, a color display, a microphone input and USB audio recording with 256-note polyphony. This review covers who the combination suits, where the GHS action and weight hold it back, and how it compares with the Roland FP-E50 and Casio PX-S3100.
Our Verdict
Research Score 83/100The Yamaha DGX-670 is the arranger piano to buy if you want Yamaha's style library and CFX grand in one instrument with a screen, a mic input and recording. It is a complete home entertainment keyboard with a genuine piano at its core. The GHS action is the limit for a serious pianist, and the Roland FP-E50 has the better keyboard; the DGX-670 answers with more styles, a color display and a lower price.
Editorial research score based on published specifications and documented features, not a customer rating or lab test.
Yamaha
Yamaha DGX-670
Best for: Players who want one keyboard that is a piano, a backing band and a songwriting tool
Skip it if: you only play piano and want a better action for the money
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Listing verified: October 2026
Who Should Buy It
Buy it if
- You sing while you play and want a mic input with effects
- You use styles and backing tracks for practice or performance
- You want Yamaha's CFX sample with a huge voice library
Skip it if
- Touch matters most; the P-225 or Roland FP-30X play better
- You want a slim, light piano
- Menus and screens are not for you
Key Specifications
| Key Action | GHS (Graded Hammer Standard) |
| Sound Engine | Yamaha CFX stereo sample |
| Voices | 630 |
| Polyphony | 256 notes |
| Speakers | Built-in stereo |
| Bluetooth | Audio |
| USB | USB audio and MIDI; USB flash-drive recording |
| Pedals | Sustain footswitch included; LP-1B triple pedal optional |
| Weight | Not published for the piano alone |
| Form Factor | Portable arranger piano with color display |
What the DGX-670 Is
The DGX line is where Yamaha puts its PSR arranger technology on an 88-key weighted keyboard. The DGX-670 pairs the GHS action with the CFX stereo sample, 630 voices, 263 styles with the Adaptive Style feature that follows your dynamics, a color display, a microphone input, a six-track recorder and USB audio recording, all with 256-note polyphony. The listing confirms the voices, styles, CFX sample and the included footswitch and music rest; a stand and three-pedal unit are extra.
It is heavier and deeper than a plain portable because of the panel and speakers, and it is priced between the P-225 and P-525.
Action
GHS is the graded hammer action from the P-45 and Arius YDP-105 and YDP-146: heavier in the bass, lighter in the treble, plastic keys, two sensors, no escapement. It is a sound teaching action and a limit for an advancing pianist. Among arranger pianos it is comparable to the Casio PX-S3100's Smart Scaled action and a step behind the Roland FP-E50's PHA-4 Standard with escapement. Buyers who prioritize keys should weigh the Roland; buyers who prioritize styles will accept the GHS.
Piano Sound and the Voice Library
The CFX stereo sample gives the DGX-670 a convincing concert grand with natural resonance, and with 256-note polyphony it never drops notes even with a style running and two voices layered. The 630 voices cover Yamaha's full range of pianos, electric pianos, organs, strings, brass, guitars, basses, drums and synths, with Super Articulation voices that add playing nuances.
The 263 styles are the DGX-670's purpose: full rhythm sections in pop, rock, jazz, Latin, dance and more, with intros, variations, fills and endings. Adaptive Style shifts between variations according to how hard and how many notes you play, which makes the backing band feel responsive rather than mechanical.
Microphone, Recording and Connectivity
A microphone input with reverb and vocal harmony lets a singer perform through the keyboard's speakers or line outputs. The six-track MIDI recorder and USB audio recording to a flash drive capture songs complete with styles and vocals. Bluetooth audio streams a phone's music; USB carries audio and MIDI to a computer; line outputs feed a PA. Bluetooth MIDI is not included, so apps connect over the USB cable.
Speakers, Weight and Setup
The built-in stereo speakers are strong enough for a living room or a small gathering and carry the styles and vocals convincingly. The DGX-670 is heavy and deep for a portable; the listing's weight appears to include packaging, and Yamaha's specification puts the keyboard alone at roughly 47 pounds. The L-300 stand and LP-1B three-pedal unit are the matching accessories.
DGX-670 Against the Alternatives
Against the Roland FP-E50, the Roland has the better action and the ZEN-Core synth engine; the Yamaha has more styles, a color display, Adaptive Style and a lower price. Against the Casio PX-S3100, the Casio is slimmer, lighter and battery-capable; the Yamaha has the CFX sample, the display, the mic input and more polyphony. Against the Yamaha P-225, the P-225 is the better pure piano with the newer GHC action and VRM Lite; the DGX-670 is the better entertainment keyboard.
Buy the DGX-670 when styles, singing and recording are the point and the piano is one part of the whole.
Who Keeps It
Solo performers, worship musicians, songwriters and families who want one keyboard for everyone keep the DGX-670 for years because it does so much. Pianists who bought it for the CFX sample and never used the styles usually move to a P-225 or P-525 for the action. Decide which you are before buying.
Strengths and Limitations
Strengths
- 630 voices and 263 accompaniment styles with the CFX grand on top
- Color display and a full arranger workflow
- Microphone input with vocal effects and USB audio recording
- 256-note polyphony and Bluetooth audio
Limitations
- GHS is Yamaha's entry action
- Heavy and deep for a portable
- Menus run deep for a pure pianist
How We Scored It
Scores reflect published specifications, documented features and value against the alternatives below. They are editorial research scores, not laboratory measurements.
Alternatives to Consider
Roland FP-E50
Singer-songwriters and worship players who want Roland's piano action with a full arranger and a mic input
Read the Roland FP-E50 review →
Casio Privia PX-S3100
Players who want the PX-S1100's slim piano plus a full arranger and performance controls
Read the Casio Privia PX-S3100 review →
Yamaha P-225
Players who want Yamaha's flagship CFX tone in a slim portable with proper outputs
Read the Yamaha P-225 review →Head-to-Head Comparisons
- Roland FP-40 vs Yamaha DGX-670 Compare →
Questions Buyers Ask
Yamaha DGX-670
See the current listing, price and included accessories.
About This Review
Mandrillis Team
The Mandrillis editorial team researches and compares audio and music gear using manufacturer documentation, verified specs and real buyer feedback, so you can make a confident purchase without wading through marketing claims.
Read our full research methodology.