JD Minuet:

• Positioning: Entry-level hybrid tube amplifier with built-in media player functionality.
• Description: Features a hybrid design combining tube preamp with solid-state power output, delivering 60W per channel with digital connectivity including USB and network inputs. Unlike the pure tube designs in the lineup, this model offers modern convenience features like Bluetooth and digital inputs while maintaining tube warmth.

JD-707A:

• Positioning: Mid-level pure tube integrated amplifier designed for traditional audiophile applications.
• Description: Delivers 23W per channel using 6L6GC power tubes in an ultra-linear Class AB1 configuration, providing classic tube warmth and dynamics. Compared to the hybrid Minuet, this model offers pure tube amplification throughout the signal path but with lower power output.

JD Serenade:

• Positioning: Mid-to-upper level tube integrated amplifier with enhanced power and modern connectivity.
• Description: Produces 30W per channel using EL34 power tubes with Bluetooth 5.0 and Apt-X HD support, offering more power than the 707A while maintaining pure tube design. The EL34 tubes provide a different sonic character compared to the 707A's 6L6GC tubes, typically offering more midrange warmth and musicality, while the integrated Bluetooth makes it more versatile than the 707A for modern sources.

HD88:

• Positioning: High-end tube power amplifier with advanced circuit design and multiple operating modes.
• Description: Features auto-bias KT88 tubes delivering 60W per channel with multiple amplifier modes including integrated, mono-biamp, and bridge configurations. Unlike the integrated amplifiers in the lineup, this model includes advanced features like automatic bias adjustment, nano-graphene heat dissipation technology, and the ability to bridge to 180W mono.

JD-90:

• Positioning: Flagship current-mode tube power amplifier representing the company's most advanced technology.
• Description: Employs proprietary current-mode circuit architecture with KT90 power tubes, eliminating traditional phase-split distortion while achieving exceptional 100dB signal-to-noise ratio. This groundbreaking design philosophy differs fundamentally from all other models in the lineup by using current-mode rather than voltage-mode amplification, resulting in wider bandwidth and lower distortion, though at 25W per channel it prioritizes sonic purity over raw power for the most discerning listeners.