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Casio PX-870 Privia Digital Piano - Black Bundle vs Yamaha DGX-670B, 88-Key Weighted Digital Piano

Updated August 2026 — Casio PX-870 Privia Digital Piano - Black Bundle leads on accessories and features.

The Casio PX-870 offers superior sound quality and a comprehensive learning bundle, while the Yamaha DGX-670B is more budget-friendly with extensive features. Ultimately, the Casio is the better choice for those seeking a traditional piano experience.

Why Casio PX-870 Privia Digital Piano - Black Bundle is better

Sound Quality

Casio features an award-winning AiR Sound Source.

Learning Bundle

Includes instructional materials and accessories.

Key Action

Tri-Sensor II Scaled Hammer Action for nuanced touch.

Why Yamaha DGX-670B, 88-Key Weighted Digital Piano is better

Price

Yamaha is approximately 17% cheaper.

Versatility

Offers 630 instrument voices and 263 styles.

Portability

Lighter and easier to move without a built-in stand.

Overall score

Casio PX-870 Privia Digital Piano - Black Bundle
88
Yamaha DGX-670B, 88-Key Weighted Digital Piano
75

Specifications

SpecCasio PX-870 Privia Digital Piano - Black BundleYamaha DGX-670B, 88-Key Weighted Digital Piano
Sound System40-watt, 4-speakerStandard stereo
Learning ToolsOnline lessons includedYou Are The Artist library
Key ActionTri-Sensor IIWeighted action
Finish OptionsBlack, Oak, WhiteBlack only
Recording2-track MIDI recorderBasic recording

Dimension comparison

Casio PX-870 Privia Digital Piano - Black BundleYamaha DGX-670B, 88-Key Weighted Digital Piano

Price Comparison

The Casio PX-870 Privia Digital Piano is priced at $899.00, while the Yamaha DGX-670B comes in at $749.99, making it about 17% cheaper than the Casio. This price difference may be significant for budget-conscious buyers or those looking for a solid instrument without breaking the bank. The Yamaha's lower price tag does not compromise its quality, as it offers a robust set of features that appeal to a wide range of players, from beginners to more advanced musicians.

Sound Quality

Both the Casio PX-870 and Yamaha DGX-670B provide impressive sound quality, yet they achieve it through different technologies. The Casio features an award-winning AiR Sound Source with a new four-layer stereo grand piano that includes realistic damper resonance. This results in a rich and dynamic sound, amplified by a powerful 40-watt, four-speaker system that fills the room with audio. On the other hand, the Yamaha utilizes CFX Stereo Sampling, which faithfully reproduces the sound of its flagship CFX Full Concert Grand. This results in rich tones and natural resonance, making both instruments excellent choices for sound quality, though the Casio may have a slight edge with its immersive audio experience.

Key Action and Feel

The Casio PX-870 offers authentic key feel with its 88 scaled, weighted hammer-action keys designed to simulate the touch of an acoustic piano. This feature is crucial for those who value expressiveness in their playing. The Yamaha DGX-670B also provides a weighted keyboard action that is heavier in the low keys and lighter in the high keys, which is particularly beneficial for practicing techniques. Both instruments deliver a realistic playing experience, but the Casio's Tri-Sensor II Scaled Hammer Action technology may offer a more nuanced touch for performance.

Features and Functionality

The Casio PX-870 is packed with features that cater to a variety of needs, including recording capabilities, a built-in music library with 60 songs, and the ability to connect two sets of headphones for quiet practice. It also includes a sliding key cover and a modern wooden cabinet. The Yamaha DGX-670B shines in its versatility, offering 630 instrument voices and 263 automatic accompaniment styles, allowing players to explore various music genres and styles. While the Casio focuses more on traditional piano features, the Yamaha provides extensive options for creative expression, making it ideal for those who enjoy experimenting with different sounds.

Design and Aesthetics

In terms of design, the Casio PX-870 boasts a stylish modern cabinet that complements any decor, available in black, oak, or white finishes. Its compact design is both elegant and functional, making it suitable for home use. The Yamaha DGX-670B, while also visually appealing, requires a separate furniture stand. Its sleek design appeals to users looking for a contemporary look but may lack the integrated furniture aesthetic offered by the Casio. Both pianos are attractive, but the Casio's bundled furniture bench adds value to its overall presentation.

Learning Features

For beginners, learning features can significantly enhance the piano experience. The Casio PX-870 comes with online lessons, an instructional book, and an instructional DVD, all included in its bundle. This makes it a comprehensive choice for new players looking for support in their learning journey. The Yamaha DGX-670B also caters to learners with its built-in microphone jack and digital vocal effects, allowing users to sing along while they play. It also provides access to the "You Are The Artist" library, which can aid in learning popular songs. Both instruments offer valuable learning tools, but the Casio's inclusive bundle may provide a more straightforward path for beginners.

Performance and Versatility

When it comes to performance, the Casio PX-870 is designed to deliver an authentic grand piano experience, suitable for concerts and performances. Its powerful sound projection system and rich tonal quality make it an excellent choice for both practice and professional use. The Yamaha DGX-670B, however, focuses on versatility, offering many voices and styles that allow players to experiment and adapt their performances to different contexts. While both instruments are capable of delivering high-quality performances, the Casio is more geared towards those seeking a traditional piano experience, whereas the Yamaha caters to a broader range of musical styles.

Which should you buy?

Choosing between the Casio PX-870 and the Yamaha DGX-670B ultimately depends on your specific needs and preferences. If you prioritize sound quality, authentic key feel, and an all-in-one bundle for learning, the Casio PX-870 is a compelling option, despite its higher price of $899.00. However, if you are looking for a more budget-friendly choice with a broader range of sounds and features, the Yamaha DGX-670B at $749.99 stands out as an excellent value. Each has its strengths, so consider what aspects are most important to you before making a decision.