The THE21 Sub PRO ACTIVE 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 AS’s 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 AS 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; THE24/32/50/80 SUB PRO SEALED 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.
Enormous power is achieved with the integrated powerful DSP and amplifier unit. The immensely powerful 3kW amplifier and even more powerful 6kW Power-supply handle any musical or movie attack with ease.
Specification
General
Speaker Type: 21” forward-firing, dual gap motor structure with 2 inner and 2 outer voice coiles, neodymium motor
XMAX: 17.5 mm excursion each direction (35 mm linear), voice coil remaining in homogeneous magnetic field, linear and lower distortion
Principle: Sealed
Passive | Active: Active, built in DSP Amplifier
Measured Data
SPL Peak (Peak / Half Space 2pi): Measured Data 139 dB @ 63 Hz
Frequency Range: Measured Data (Without DSP) 55 Hz - 500 Hz / -3 dB 28 Hz - 500 Hz / -12 dB
Directivity Horizontal x Vertical in deg°: 360°
Max Linear Air Volume Displacement: 1.54 US. liq. gal. | 5.82 L
Power Specifications & Features
Output Power: 3000 W
Power Supply Requirements: 100-240 VAC, 50-60 Hz (Operating: 90-265 VAC)
Power Consumption
230 VAC - 1/8 rated power (4 Ohm)
3.2 A / 490 W
120 VAC - 1/8 rated power (4 Ohm)
6.2 A / 490 W
Idle: 0.5 A / 61 W
Automatic Power Off
Trigger
Connections
Input: 1 x XLR Balanced
Output: 1 x XLR Balanced Link
Power: Neutrik powerCON True 1 in-out
Communications: 2 x RJ45 / Daisy Chain
Signal Processing & Control
Protection Features: Turn-on transients, Over-heating, DC, RF, Short-circuit, mismatched loads, ICL™, PMS™
Controller: OCS Software Control
Converter: High Performance 96 kHz / 24 bits AD/DA converters, 64 bit double-precision 96 kHz DSP process
Input IIR EQ Section: Gain, Mute, Phase inversion, Delay (up to 116 ms, 40 m), 10 EQ filters (Parametric, Shelving, LP, HP, BP, SB, AP)
Dimensions & Weight
Dimensions (W/H/D) mm (Without Grille): 600 | 1125 | 370 (Height without feet: 1100) (Depth with plug: 400)
Dimensions (W/H/D) inch (Without Grille): 23 5/8 | 44 1/4 | 14 4/7 (Height without feet: 43 1/3) (Depth with plug: 15 3/4)
Packing Dimensions (W/H/D) mm: 700 | 1250 | 500
Packing Dimensions (W/H/D) inch: 27 5/9 | 49 1/5 | 19 2/3
Weight: 127.87 lbs | 58 kg
Gross Weight: 147.71 lbs | 67 kg
Design & Mounting
Enclosure: Internally braced MDF
Finish: Structural paint black
Mounting: Floorstanding with feet
Grille: The THE21 SUB PRO ACTIVE SEALED is supplied with a front cover as standard
The THE21 Sub PRO ACTIVE 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 AS’s 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 AS 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; THE24/32/50/80 SUB PRO SEALED 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.
Enormous power is achieved with the integrated powerful DSP and amplifier unit. The immensely powerful 3kW amplifier and even more powerful 6kW Power-supply handle any musical or movie attack with ease.
Specification
General
Speaker Type: 21” forward-firing, dual gap motor structure with 2 inner and 2 outer voice coiles, neodymium motor
XMAX: 17.5 mm excursion each direction (35 mm linear), voice coil remaining in homogeneous magnetic field, linear and lower distortion
Principle: Sealed
Passive | Active: Active, built in DSP Amplifier
Measured Data
SPL Peak (Peak / Half Space 2pi): Measured Data 139 dB @ 63 Hz
Frequency Range: Measured Data (Without DSP) 55 Hz - 500 Hz / -3 dB 28 Hz - 500 Hz / -12 dB
Directivity Horizontal x Vertical in deg°: 360°
Max Linear Air Volume Displacement: 1.54 US. liq. gal. | 5.82 L
Power Specifications & Features
Output Power: 3000 W
Power Supply Requirements: 100-240 VAC, 50-60 Hz (Operating: 90-265 VAC)
Power Consumption
230 VAC - 1/8 rated power (4 Ohm)
3.2 A / 490 W
120 VAC - 1/8 rated power (4 Ohm)
6.2 A / 490 W
Idle: 0.5 A / 61 W
Automatic Power Off
Trigger
Connections
Input: 1 x XLR Balanced
Output: 1 x XLR Balanced Link
Power: Neutrik powerCON True 1 in-out
Communications: 2 x RJ45 / Daisy Chain
Signal Processing & Control
Protection Features: Turn-on transients, Over-heating, DC, RF, Short-circuit, mismatched loads, ICL™, PMS™
Controller: OCS Software Control
Converter: High Performance 96 kHz / 24 bits AD/DA converters, 64 bit double-precision 96 kHz DSP process
Input IIR EQ Section: Gain, Mute, Phase inversion, Delay (up to 116 ms, 40 m), 10 EQ filters (Parametric, Shelving, LP, HP, BP, SB, AP)
Dimensions & Weight
Dimensions (W/H/D) mm (Without Grille): 600 | 1125 | 370 (Height without feet: 1100) (Depth with plug: 400)
Dimensions (W/H/D) inch (Without Grille): 23 5/8 | 44 1/4 | 14 4/7 (Height without feet: 43 1/3) (Depth with plug: 15 3/4)
Packing Dimensions (W/H/D) mm: 700 | 1250 | 500
Packing Dimensions (W/H/D) inch: 27 5/9 | 49 1/5 | 19 2/3
Weight: 127.87 lbs | 58 kg
Gross Weight: 147.71 lbs | 67 kg
Design & Mounting
Enclosure: Internally braced MDF
Finish: Structural paint black
Mounting: Floorstanding with feet
Grille: The THE21 SUB PRO ACTIVE SEALED is supplied with a front cover as standard
Image 1 of 5
Image 2 of 5
Image 3 of 5
Image 4 of 5
Image 5 of 5