21” Passive Band-Pass Subwoofer

Created for ultimate electro acoustical performance, BASSO21t delivers very high SPL levels and efficiency in a medium format enclosure. Applications have a very wide range of possibilities, since it can be chosen to be "the sub" of portable, regional touring or installed solutions with limited budget, or extreme SPL solutions for touring or club installations that combine arrangements multiple units.

▪ High output 5th order Band-Pass design
▪ Premium European High Efficiency custom IDEA 21” transducer
▪ Dual Neutrik NL4 connectors
▪ 8 Ohm Passive
▪ Rugged and durable 18 mm birch plywood construction and finish
▪ Durable paint coating process, available in standard textured black or white
▪ Optional RAL colors (on demand)
▪ Four integrated handles and two 36 mm pole cups (V/H)
▪ Compatible rigging accessories (optional) for stacked and flown configurations with VOA systems

▪ High SPL A/V, portable professional sound reinforcement and touring
▪ Flown subwoofer in fixed installations for concert venues and sports arenas
▪ Main or distributed subwoofer system in Pubs, Lounges, Bars and clubs
▪ “Infra” extension for BASSO Series LF sections
▪ Broadcast Studios and Screening rooms

Many key factors are to be considered when configuring the subwoofer section of a loudspeaker system to perfectly match each application: size/weight, logistic and operational setups, SPL needs, LF extension, cost limitations, as well as sound engineer preferences (depending on different the type and size of the event) or audio program characteristics and regional style taste for subwoofer mixes.
BASSO Series models allow the user to choose the most adequate subwoofer for any given situation from within a family of products with common finish, design solutions and performance philosophy as well as shared rigging and transport accessories.
BASSO21t is a 21″ subwoofer that has been designed to deliver high SPL levels and efficiency out of a medium format enclosure delivering serious power density.
The 5th Order Band-Pass design together with the premium-quality European 21″ woofer deliver serious SPL with maximum impact in the 50 to 100 Hz octave and the extended sub range of 39 Hz allows for Infra extension application into any system.
BASSO21t features four integrated handles and two 35 mm pole mount sockets for vertical and horizontal set-ups.BASSO21t is compatible with optional BASSO rigging frames for ground-stacked configurations. Optional wheels kit is also available.

Type 21″ High Performance Direct Radiation Professional Subwoofer
Enclosure design Symmetrical air mass loading 5th order Band-Pass
Transducers 1 x 21″ High performance woofer
RMS Power Handling * 1 500 W
Nominal Impedance 8 Ohm
SPL (Continuous/Peak) 132 / 138 dB SPL
Frequency Response (-10 dB) 39 – 150 Hz
Dimensions (W x H x D)
900 x 600 x 850 mm (35.4 x 23.6 x 33.5 inch)
81 Kg (178.5 lbs)
2 x Neutrik SpeakON NL-4 in Parallel
Subwoofer Signal
Parallel Signal
Construction 18 mm Birch Plywood
Grille 2 mm perforated weatherized steel with protective foam
Finish Durable IDEA proprietary Aquaforce High Resistance paint coating process
Handles 4 integrated handles
Wheels 4 optional wheels
Feet/Skates 2 skates (H)
Rigging system Compatible with BASSO rigging accessories (optional)
Installation Two 36 mm Pole mount sockets (H/V)
Accesories BASSO rigging structure (RS-BASSO-L) for stacked/flown configurations
Rigging frame (RF-900)
Rigging frame (RF-9060) for VOA and EVO flown-sub set-ups
35 mm pole (K&M-21338)
Wheels (WH-04)

* IEC filtered pink noise with a 6dB crest factor, 2 hours.