Funktion-One speaker is directional controlled thereby enabling the amount of loss to a minimum and famous, there are now more than ever proved to audiences around the world shocked dynamic Funktion-One low-frequency speakers.
The Funktion-One speaker is well-known for its directional control to minimize energy loss. Now there are more facts to prove to audiences all over the world the unprecedented shock of the Funktion-One low-frequency speaker. Tony Andrews first developed and widely used 21" low frequency unit in 1980 with another industry leader, Precision Devices, and added it to the low frequency part of the highly valued Flashlight system design, which became a lot of touring performances that year. Groups including Pink Floyd Band and Dire Straits Band selected performance amplification equipment. Until recently, Funktion-One understood the need for touring performances and used the most advanced materials, and then used the original 21" unit speaker concept to make 21" low-frequency speakers again It is launched. It uses neodymium magnets to replace the previous ceramic magnets to reduce the weight of the driver from 28.5kg to 11.5kg, making the feasibility of dual 21" low frequency speakers realized. Funktion-One is designed with a sturdy dual 6" tone. The ring 21" driver has an unbelievable input power, which enables the F221 to output particularly efficient high-intensity and fast-reacting, yet realistic, highest-level low-frequency sound.
F221 can choose 4Ω or 8Ω driver version, and equipped with pulley and copper net for purchase.
characteristic:
• Well-tested horn load design, and new adjustments
• Funktion-One design driver
•Integrated handle
• Face mesh options
• Optional part of sinking pulley hole, convenient for stacking during transportation
driver | Frequency band | Sensitivity (1w@1m) | Recommended power amplifier (Rms)* | Nominal impedance |
2×21" | 20-200Hz | 107dB | 1500W | 2×4Ω, total 2Ω or 2×8Ω, 4Ω in total |
*AES standard
Frequency response ±3dB: | 40Hz-250Hz |
weight: | 130kg (288lbs) |
structure: | 18mm birch compression board |
interface: | 2×Speakon NL4 (One driver connects to 1+/1-, the other driver connects to 2+/2-) |

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