Crystal 4

55 US $ per pair

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

Pure Expression in a Compact Form

Designed for purist audio lovers, the Crystal 4" Full-Range Driver by Lii Audio brings refined musicality and high sensitivity to compact speaker builds. The lightweight paper cone is engineered for natural tone, fast transient response, and an open midrange — making it an ideal choice for nearfield listening, small full-range enclosures, and high-efficiency systems.

At just 4 inches in diameter, the Crystal delivers surprising presence and clarity, with a sensitivity of 93.5 dB and smooth performance across the critical midband. The precision-balanced motor design and low moving mass (just 3.2 grams) allow this driver to track fine details effortlessly, while maintaining dynamic punch and musical coherence.

Whether you're crafting a desktop HiFi system, building a minimalist full-range tower, or exploring open baffle designs, the Crystal 4" offers a revealing, uncolored sound that thrives on low-watt amplification and direct signal paths—no crossover needed.

Key Features

4" Paper Cone Full-Range Driver tuned for tonal purity and fast response
Natural Midrange Focus — ideal for vocals, acoustic instruments, and critical listening
High Sensitivity: 93.5 dB SPL — excellent match for low-watt tube or solid-state amps
Low Le (0.03 mH) for open high-frequency performance
No Crossover Needed — pure and direct signal transfer
Perfect for Nearfield, Desktop, or Compact Cabinet Designs

Technical Specifications (Thiele-Small Parameters)

Resonant Frequency (Fs)
114 Hz

Mechanical Resonance (Fo)
81.6 Hz

Vas
3.41 Liters

Re (DC Resistance)
7.6 Ω

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

Qms
4.49

Qes
0.87

Qts
0.72

Sd (Cone Area)
58 cm²

Cms (Compliance)
0.812 mm/N

Mms (Moving Mass)
3.2 g

Mmd (Diaphragm Mass)
1.985 g

Rms (Mechanical Loss)
0.79

Le (Voice Coil Inductance)
0.03 mH

Power Handling
30 Watts

Application Notes

Best suited for single-driver systems, desktop HiFi
Performs beautifully with low-power tube amps, Class A, or high-efficiency solid-state designs
No crossover required — preserving clarity and signal integrity
Sold as a matched stereo pair