The i.Flex15B bass reflex system with its 15-inch long-stroke loudspeaker serves as a bass support for PA systems of all kinds


  • • fixed installation for any kind of PA-System
  • • Sub- and Lo Extension for all kind of speakers

Subwoofer i.Flex15B

The i.Flex15B is a bass-reflex system and was specially designed to be combined with the other models of the AD-Systems i.flex-Series. It extends the frequency range of the i.flex models to the lowest range of 38 Hz and withstands a continuous power of 750 W/3.000 W (RMS / peak).

The i.Flex15B has powerful, low distortion features and offers natural reproduction. It necessitates the use of an external active crossover.

The enclosures are made from birch polywood and are painted impact-proof. The front is protected by a rugged grille. It is also covered with interchangeable acoustic foam. Option: passive X-Over for i.Flex15B


• Fixed installation for any kind of PA-System
• Sub- and Lo Extension for all kind of speakers


• 15“ long excursion woofer with 4“ voice coil
• Power handling: 750 Watt RMS | 3,000 Watt Peak
• Compact, elegant, highly efficient design

See other speakers from the i.Flex-Series

Get an overview of other subwoofer solutions from our company. If you have any questions, please do not hesitate to contact us. Actual prices for the i.Flex15B subwoofer as well as the current product catalog are available on request.

15 mm birch polywood with structure paintg
Basic layout
bass-reflex tuning
Protective Grille
1.5 mm grille, covered with acoustic foam
15“ long excursion woofer with 4“ voice coil,
Frequency Response
42 Hz–250 Hz
Power handling RMS | peak
750 W RMS | 3,000 W Peak
Nominal Impedance
8 Ω
Dispersion pattern
94 dB
130 dB | peak | 1 m
NL4: 2+/2-
Dimensions (w x h x d)
450 x 500 x 580 mm
net weight
29 kg
100V transformer,
special paint RAL colours

iFlex15B – Accessories

Optional equipment: 70V/100V, Outdoor Finish, RAL Colours