Casio Privia PX-870 – 88-Key Weighted Console vs Yamaha DGX-670B, 88-Key Weighted Digital Piano
Updated August 2026 — Casio Privia PX-870 – 88-Key Weighted Console wins on touch and sound, Yamaha DGX-670B, 88-Key Weighted Digital Piano wins on connectivity and value.
The Casio Privia PX-870 offers superior sound quality and authentic piano feel, while the Yamaha DGX-670B provides versatility and a lower price point. Choose based on your priorities.
Why Casio Privia PX-870 – 88-Key Weighted Console is better
Sound Quality
Privia uses AiR Sound Source for immersive grand piano sounds.
Touch and Feel
Privia features Tri-Sensor II keys for a more authentic experience.
Learning Features
Privia includes a 2-track MIDI recorder and duet mode.
Why Yamaha DGX-670B, 88-Key Weighted Digital Piano is better
Price
DGX-670B is $249 cheaper.
Variety
DGX-670B offers 630 instrument voices.
Connectivity
DGX-670B supports Yamaha music apps.
Overall score
Specifications
| Spec | Casio Privia PX-870 – 88-Key Weighted Console | Yamaha DGX-670B, 88-Key Weighted Digital Piano |
|---|---|---|
| Price | $999.00 | $749.99 |
| Keys | 88 | 88 |
| Speakers | 40W | N/A |
| Voices | 18 | 630 |
| Accompaniment | N/A | 263 styles |
Dimension comparison
Overview of the Casio Privia PX-870 and Yamaha DGX-670B
The Casio Privia PX-870 is priced at $999.00, while the Yamaha DGX-670B offers a lower price point of $749.99, making it about 17% cheaper. Both digital pianos cater to different user needs and preferences, but they share the common goal of delivering authentic piano experiences. This comparison will delve into their features, sound quality, and overall value to help you decide which model suits you best.
Key Features
The Casio Privia PX-870 boasts a rich set of features, including 88-key Tri-Sensor II Scaled Hammer Action keys and a powerful 40W sound system. In contrast, the Yamaha DGX-670B features 88 weighted keys as well, but emphasizes its variety with 630 instrument voices and 263 automatic accompaniment styles. While both instruments prioritize an authentic piano feel, the Privia’s focus is on delivering a concert grand experience, while the DGX-670B is designed for versatility and entertainment.
Sound Quality
Sound quality is a crucial factor in choosing a digital piano. The Casio Privia PX-870 utilizes the AiR Sound Source technology to produce immersive grand piano sounds with advanced resonance features. It has a powerful 4-speaker sound system that projects rich audio throughout any space. The Yamaha DGX-670B, on the other hand, uses CFX Stereo Sampling to replicate the sound of Yamaha’s flagship CFX Full Concert Grand. Both models provide excellent sound quality, but the Privia focuses on creating a fuller depth of sound, while the DGX-670B offers a broader variety of instrument sounds.
Touch and Feel
When it comes to touch and feel, the Casio Privia PX-870 features 88-key Tri-Sensor II Scaled Hammer Action keys that simulate the texture of ebony and ivory, providing a remarkable tactile experience. The Yamaha DGX-670B, however, has a weighted keyboard that adjusts the action from heavier in the low keys to lighter in the high keys, which is ideal for practicing or casual playing. While both models deliver excellent key action, the Privia may appeal more to those seeking a traditional piano feel.
Learning and Practice Features
The Casio Privia PX-870 is built for learning, featuring dual headphone jacks, a duet mode, and 60 built-in songs for practice. It also has a 2-track MIDI recorder to help users develop their skills. The Yamaha DGX-670B also offers a range of learning features, including the You Are The Artist library, which provides access to popular songs and sheet music, as well as a built-in microphone jack for vocal performances. Both models support learning, but the Privia is more focused on practice tools, whereas the DGX-670B emphasizes a wider array of engaging features.
Connectivity Options
Connectivity options are important for modern musicians, and both the Casio Privia PX-870 and Yamaha DGX-670B offer class-compliant USB-MIDI connectivity. This allows for easy plug-and-play compatibility with various devices. However, the DGX-670B stands out with its support for Yamaha music apps, enhancing the user experience through additional functionalities. While both models provide essential connectivity, the Yamaha DGX-670B may appeal more to tech-savvy users looking for expanded capabilities.
Design and Aesthetics
The design of the Casio Privia PX-870 is sleek and elegant, featuring a stylish console design that fits well in any modern setting. The sliding key cover adds to its aesthetic appeal, making it suitable for home decor. The Yamaha DGX-670B comes in a classic black finish and includes a music rest and sustain foot switch, but the stand is sold separately. While both models are visually appealing, the Privia offers a more sophisticated look that may attract those who value style in their musical instruments.
Price and Value
At $999.00, the Casio Privia PX-870 is positioned as a premium model, while the Yamaha DGX-670B is priced at $749.99, which is about $249 cheaper. This price difference may influence buyers who are looking for value without compromising on quality. Despite the lower price, the DGX-670B offers a wide range of features and sounds, making it an excellent choice for casual players or beginners. In contrast, the Privia may be more appealing to serious musicians or those seeking a more authentic piano experience.
Which should you buy?
Choosing between the Casio Privia PX-870 and the Yamaha DGX-670B ultimately depends on your specific needs and preferences. If you prioritize sound quality, authentic piano feel, and practice features, the Casio Privia PX-870 may be the better choice for you. However, if you are looking for a versatile instrument with a broader range of sounds and learning tools at a lower price point, the Yamaha DGX-670B could be more suitable. Both models offer exceptional value, but your decision should be guided by what features and characteristics matter most to you as a musician.

