Lii Audio F21" Full Range Speaker Driver
21 Inch High Efficiency Wideband Driver for Large enclosure, Open Baffle and Tube Amplifiers
2550 USD per pair
Contact us to get a quote with shipping:
contact@liiaudiohifi.com
Less, but bigger.
When scale matters but you want to keep the simplicity and the clarity of a full-range system for you Hi-Fi listening sessions.
The Lii Audio F21 is a 21“ inch wideband driver designed for high efficiency loudspeaker systems and low power tube amplifiers.
It delivers a very large sense of scale with a warm and rich sound textures in the medium section, a soft high tone, and a deep and punchy bass part.
Unlike conventional multi-way systems, it preserves phase integrity and avoids the fragmentation introduced by crossovers.
The result allows the listener to dig into the sense of scale and immersion without compromise.
The sound feels bigger than real, without being restricted. It is one of a kind in the full-range market.
Considering it’s wide frequency range it can accomodate a wide variety of music genre.
With a sensitivity of 98 dB, it pairs exceptionally well with single ended tube amplifiers such as 300B & 2A3.
Designed for open baffles or large enclosures, it can be used alone or combined in a multi way system that will need careful matching.
Rather than adding complexity through multiple drivers, DSP or heavy crossover networks, we focus on coherence, phase integrity and high efficiency.
Additional drivers can be used when necessary, but always with the goal of preserving a natural and unified presentation.
Design Philosophy:
This driver is designed for coherence, phase integrity and musical realism rather than absolute bandwidth or flat laboratory measurements.
Features:
- 21 inch field coil driver
- High efficiency (98 dB)
- Y38 Neodymium Aerospace magnet
- Wideband response (28 Hz – 20 kHz)
- EPS foam diaphragm for natural tonal balance
- No crossover required for full range operation
Applications:
- Open baffle speaker systems
- Large enclosures
- Tube amplifier systems (300B, 2A3,)
- High efficiency audio systems
Measurements:
Frequency response measured at 1 meter with 2.83V input in open baffle configuration.
Performance will vary depending on enclosure design, room acoustics and system integration.
Technical Specifications
Type: Full Range Speaker Driver
Diameter: 21 inch
Resonant Frequency (Fs)
28 Hz
Frequency Response
28 Hz – 20,000 Hz
Sensitivity (SPL)
98 dB (1W/1m)
Qts
0.53
Nominal Impedance
8 Ω
Max Power
150 W
Driver Construction:
Cone: EPS foam diaphragm
Surround: Fabric (DuPont)
Magnet System:
Y38 NeodymiumAerospace magnet
Magnet flux : 20500 Gauss
Net Weight
18 Kg
Installation Notes
Optimized for open baffle, horn, or high-efficiency enclosures
Built for audiophile systems – delivering unmatched scale, depth, and realism
