Ascendo ASC-21SPPS The21 SUB Ascendo 21" PRO - Passive Sealed Subwoofer
A reference-tier component supplied by specification and private consultation, matched to your room, delivered and calibrated. We'll prepare a tailored proposal for you.
A proposal covers the component, professional installation and full calibration, matched to your room and priced as a finished result, not just the box.
Overview
THE 21 SUB PRO-PASSIVE SEALED
- PASSIVE
- SEALED
The21 SUB PRO PASSIVE SEALED is a jewel in the pool of subwoofers designed for the highly educated customer that is on the quest for the highest performance and understands how to differentiate sound quality. When this customer experiences the The21 SUB PRO PS unparalleled output and uncolored sound, the measured test results we publish translate perfectly to realized performance. ASCENDO’s policy is to be completely transparent and publish measurements done by independently certified third-party labs to provide factual data, thereby enabling informed, educated decisions. The The21 SUB PRO subwoofer is so far above and beyond the competition in every aspect; refined musicality, tightness, and output levels suitable for a 21"" driver. It is also engineered to operate perfectly in sync (in phase) with our Infrasonic subwoofers; The24 PRO, The32 PRO, The50 PRO, The80 PRO when there is a desire to reproduce movie content below 20Hz with the same authority, precision, and musicality.
Compared to conventional subwoofer motor concepts, the ultra-modern double-gap motor of this custom-made 21" driver with two outer and two inner voice-coils enables more linear travel and much faster directional changes with higher sound power and significantly lower power compression.
Specifications
|
Speaker type |
21-inch forward-firing, dual gap motor structure with 2 inner and 2 outer voice coiles, neodymium motor. |
|
Xmax |
18 mm excursion each direction (36 mm linear), voice coil remaining in homogeneous magnetic field, linear and lowest distortion |
|
Passive | Active |
Passive |
|
Recommended amplifiers |
1Ch DSP + Amplifier are required. Min. recommended amplifier: 109 Vrms, 154 Vpk, 27,3 A; equivalent to 3000W@4Ω with correct RMS & Peak limiting & compression settings. |
|
Recommended ASCENDO amplifiers |
(With additional external 1CH DSP: AIA2-6004), DSP4-10K2 |
|
Principle |
Sealed |
|
SPL (peak / half space 2 pi) |
Measurement data |
|
Frequency range |
Measurement data |
|
Efficiency |
97 dB / 1W/m |
|
Power handling |
4000 W |
|
Impedance |
4 Ω |
|
Air volume displacement |
2,88 L / in comparison 21" standard cinema subwoofer 1,76 L |
|
Directivity horizontal x vertical in Deg° |
360° |
|
Input Terminal |
Neutrik |
|
Enclosure |
Internally braced birch ply and MDF |
|
Width |
23,62 " | 600 mm |
|
Hight |
43,31 " | 1100 mm |
|
Hight with feet |
44,29 " | 1125 mm |
|
Depth without grille |
14,57 " | 370 mm |
|
Depth with plug |
14,57 " | 370 mm |
|
Weight |
112,44 lbs | 51kg |
|
Finish |
Structural paint black |
|
Custom colour options |
Piano lacquer, colour of choice, matt or other finishes upon request |
|
Shape customisation |
Upon request |
|
Mounting |
Floor standing with feet |
The21 SUB PRO ACTIVE SEALED is supplied with a front cover as standard
Technical modifications subject to change without further notice
Equipment is only half the science. The room is the other half.
A reference component like this only performs in an acoustically engineered, light-controlled space. Discover how Dominion designs and builds uncompromised private cinemas around elite hardware, engineered as architecture.
Discover DominionSpecifications
Indicative: a full specification is prepared for your room. Request the datasheet
How a reference commission works
Enquire
Tell us about your room and what you want to achieve. No obligation.
Private consultation
A specialist reviews your space, in person or online, and what you want to achieve.
Specification & proposal
We match the component and its setup to your room, and prepare a tailored proposal.
Delivery & calibration
White-glove installation and on-site calibration to reference, supported locally.
Enquire about this product
Tell us a little about your room and we'll prepare a tailored proposal, or arrange a private demonstration.