Crystal 6

232 US $ per pair

Contact us to get a quote with shipping at contact@liiaudiohifi.com

Premium Alnico Driver | 2024 Edition

Lii Audio proudly introduces the Crystal-6 a refined 6.5-inch full-range driver that blends tradition with innovation. This special edition features a new cobalt-based Alnico 5 magnetic circuit, inspired by classic horn-era horseshoe structures, delivering a dense magnetic field.

With a remarkable 94 dB sensitivity, the Crystal-6 is easily driven by low-power tube amps, SETs, or minimalist solid-state systems. Despite its compact size, it produces a natural, emotionally engaging sound with rich midrange texture, sparkling highs, and articulate bass in properly tuned enclosures.

This unit shines in nearfield listening, bookshelf speaker systems, open-baffle builds, or single-driver cabinets — especially for those who favor vocal clarity and instrumental realism. Violin, piano, and acoustic instruments are rendered with depth and delicacy, making it a high-value choice for purist HiFi builds.

Key Features

6.5" Full-Range Driver with vintage-style cobalt Alnico horseshoe magnet
Celebrating Lii Audio’s 17th Anniversary
High sensitivity: 94 dB — ideal for low-watt tube and Class A systems
Rich, textured midrange — especially suited for vocals and strings
Open and extended frequency response with excellent detail and natural decay
Designed for bookshelf cabinets, open baffles, and wide-baffle enclosures
No crossover required — pure signal, pure tone

Technical Specifications

Resonant Frequency (Fs)
65 Hz

Frequency Response
65 Hz – 20,000 Hz

Vas
27.5 L

Re (DC Resistance)
3.2 Ohms

Sensitivity (SPL)
94 dB (1W/1m)

Qms
3.75

Qes
0.530

Qts
0.464

Sd (Cone Area)
227 cm²

Cms (Compliance)
978.5 mm/N

Mms (Moving Mass)
6.107 g

Mmd (Diaphragm Mass)
5.144 KG

Rms (Mechanical Loss)
Info ?

Le (Voice Coil Diameter)
25 mm

Nominal Impedance
8 Ohms

Max Power
40 W

Xmax
6 mm

Bl
3.314 T·m

Voice Coil Diameter
25 mm

Magnet Diameter / Material
135 mm / Ceramic Y35

Nominal Diameter
211 mm

Installation Notes

The Crystal-6 is a raw driver unit designed for integration into custom enclosures.
Performs best in small back-loaded horns, reflex cabinets, or open baffle setups.
No crossover required—pure signal, maximum coherence.
Sold as a matched stereo pair.