Used Pair Funktion One F121 Bass Enclosures available.  They are ex-hire stock, in great condition inside and out. Regularly serviced and maintained. Selling to make room for our new stock. There are some cosmetic surface scratches etc to the boxes but all have been painted and restored to look great. They sound and operate superbly.


1 pair available. Price listed is for the pair


Wheel castors included!


Options: Choice of front grills (additional charges apply)


Offers Accepted?: Yes


Warranty: Standard GDS 6 Month Used Warranty


Manufacturers Description

The F121 provides outstanding bass performance from a moderately sized enclosure making it the bass of choice for many diverse applications.  Similar in output power to an F218, this single 21” version of the F221 can be used with virtually all Funktion One mid-high loudspeakers to great effect.  The advanced   loading and driver design of this high-efficiency product provides audiences and crowds around the world with stimulating and satisfying experiences.  The F121 comprises a horn-loaded and very robust Funktion One designed 21” driver with 6” voicecoil and Neodymium magnet.  Available in 4 Ohm or 8 Ohm versions with optional wheels, throat grill and pole mount.



  • Advanced Andrews' loading
  • High output from moderately sized enclosure
  • Funktion One designed driver with Neodymium magnet
  • New driver orientation provides improved cooling
  • Integral handles
  • Choice of 4Ω or 8Ω driver

Used Funktion One F121 Bass Enclosures (Very Good Condition)

£5,500.00 Regular Price
£4,500.00Sale Price
  • Driver 




    (1W at 1m)






    20 - 200Hz



    4Ω  or  8Ω


    *AES rated


    Frequency Response ± 3dB:

    40Hz - 250Hz


    72kg (159lbs)


    18mm Birch Ply


    2 x linked Speakon NL4


Product Rating

“By far the best service I’ve ever experienced. I was importing a product to Canada and the whole experience was quick, easy and seamless. These guys really care about running a good business. Not to mention the price was cheaper than the stores here even after importing. Definitely will do more business in the future.” 

—  Philip Manzon

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