RBH UNRIVALED 21 – 21" Passive Subwoofer + DA-2602DSP Amplifier

RBH UNRIVALED 21 – 21″ Subwoofer + DA-2602DSP Amplifier

Experience the raw power of true infrasonic performance. If you haven't felt high output infrasonic frequencies, you owe it to yourself to experience the UNRIVALED 21. With an anechoic frequency response down to 10Hz, single digit in-room frequencies are possible. Pioneering G.A.D.S., the UNRIVALED 21 needs a lot of mass to control the raw power of the driver. The results are incredibly tight and accurate reproduction with incredible in-room response. Immerse yourself in the movie with definitive power.

• (1) 21″ (533mm) Long-Throw Sandwiched Carbon Fiber Cone, Stacked Neo-Mag Woofer
• 2000-4000 Watts Recommended Power; includes calibrated RBH DA-2602DSP amplifier, 4000 Watts in bridged mode
• 10-100Hz (±0.5dB) Frequency Response
• Double walled, internally braced heavy-duty HDF cabinet
• 371 lbs (168.3 kg) Weight
• 4Ω Impedance
• 92dB Sensitivity
• Made in USA
• 10 Year Limited Warranty (with registration within 90 days) / 3 Year Limited Warranty – Amplifier (with registration within 90 days)

Highlights & Key Technologies

The UNRIVALED Difference
UNRIVALED is a pursuit by RBH Sound to make the best even better; to make a speaker system with the best technology, best build quality, and top tier internal components. RBH can convert any product in their line to UNRIVALED standards on request.

Award Winning Performance
The UNRIVALED 21 was named Best Infrasonic Subwoofer by Audioholics in 2023 and Best Extreme Subwoofer by Home Theater Review in 2024. You will be astounded at the depth and realism this powerhouse subwoofer will bring to your viewing and listening adventures in cinema and two-channel experiences. It is a surprisingly useful size you will be happy to find space for.

21 Inch Carbon Fiber Woofer
The 21″ proprietary driver was co-engineered by RBH Sound and Pierce Audio. The groundbreaking, low-distortion design made exclusively for RBH features a sandwiched carbon fiber cone, shorting cap, copper sleeve and custom machine work, motivated by a series of stacked neodymium magnet cylinders in the motor structure. Pierce Audio, a privately held company, has built precision subwoofer and speaker drivers by hand in the Pacific Northwest since 2004. They innovate and engineer the highest quality and resilient subwoofer and speaker drivers for most any application. This long throw 21″ driver delivers unbelievable low frequency output.

Measured Output
A 21-inch carbon fiber cone motivated by stacked neodymium magnet cylinders, all housed in a heavily braced HDF cabinet, equals earth and soul shaking performance you have to hear and feel to comprehend. Sonic impact, clarity and low-end extension arrive at levels RBH has not attained from any of their solo-driver subwoofers during their long history, until now. With a CTA 2010 rating of 94.3dB at 10Hz, the low distortion and high output will invigorate with any soundtrack you throw at it. An incredibly linear response throughout the bandwidth delivers accurate reproduction.

G.A.D.S. (patent pending)
On select, sealed only, speaker systems, RBH's new G.A.D.S. (granular acoustic damping system) technology is employed. Not only does it have mass loading effects, which can further improve the rigidity of the cabinet, it is also an excellent acoustic absorber. The marvel of this technology is while the granular particulates may occupy a significant amount of space in the enclosure, the impact on the total volume is negligibly affected, therefore the tuning of the box is near unaffected. Granular Acoustic Damping System offers mass loading benefits to keep the cabinet stable with high powered drivers, while offering acoustic absorption at the lowest of frequencies.

Damping Materials
Wool is an excellent acoustic absorber. It has a greater density and absorptive ability over polyfill. It is the material of choice for any sealed enclosures or chambers. For ported enclosures, cabinets are lined with high quality 1 inch foam which is a terrific absorber and ensures nothing is projected out of the ports.

R.A.D. Technology (Rubberized Aluminum Dampener)
Each UNRIVALED speaker cabinet is internally lined with an anti-resonance material. This material is made from rubber and aluminum and is adhered to the internal walls of the speaker. Effectively, it adds to the absorption of unwanted vibrations.

Internally Wired with Kimber Kable
As part of the no compromise that RBH pledges with UNRIVALED systems, Kimber wire is utilized with their tried and true braided geometry which further improves crosstalk rejection and external influences.

R.D.A.P. (Resonance Damping Acrylic Polymer)
To further the performance of the speaker (as well as cosmetics), side panels made from acrylic polymer solid surface, which has a density similar to granite, can drastically improve the rigidity of the speaker, which substantially reduces cabinet resonance providing several benefits including: reducing smearing, improved imaging, improved soundstage, tightened response, and improved clarity.

Included RBH DA-2602DSP Amplifier
Each UNRIVALED 21 subwoofer is mated with a custom calibrated RBH DA-2602DSP amplifier able to achieve 4000 watts in bridged mode. RBH DA Subwoofer Amplifiers provide the power needed for deep accurate bass, whether powering a subwoofer in a home theater room or a dedicated music listening environment, and make it easy to add deep, clean, and powerful bass to any audio system when mated with a passive subwoofer or biampable tower speaker. They incorporate parametric EQ and shelving filters that allow you to custom-tune the bass in your room for the very best performance, and the robust power supply and Class D output stages provide enough power to drive the most demanding subwoofers, with optimized presets for all RBH in-wall and freestanding subwoofer products.

Cabinet, Grille & Outriggers
The subwoofer is built into a double walled, internally braced heavy-duty High Density Fiberboard (HDF) cabinet, individually hand assembled and tested, cabinet made in USA of High Density Fiberboard (HDF). It is supported by premium heavy duty outriggers, and a magnetic beauty-baffle and fabric grille are included.

Details & Specifications

MODEL INFORMATION
Model Name: UNRIVALED 21
Series: UNRIVALED
System Type: Freestanding Subwoofer
Installation Type: Freestanding
Sold per single

DRIVE UNITS
(1) 21″ (533mm) Carbon Fiber Cone, Stacked Neo-Mag Woofer
Design: Sandwiched carbon fiber cone with shorting cap, copper sleeve and custom machine work; stacked neodymium magnet cylinders in the motor structure
Co-engineered by RBH Sound and Pierce Audio

PERFORMANCE
Frequency Response: 10-100Hz (±0.5dB)
Sensitivity: 92dB
SPL Output: 123dB
Impedance: 4Ω
Power Handling: 4000 Watts
Recommended Power: 2000-4000 Watts
RBH DSP Sub Amplifier: 4000 Watts (RBH DA-2602DSP in bridged mode)
Crossover Frequencies: Variable
Crossover Slope: 6-48dB/Octave

CTA 2010 MEASUREMENTS (@2m GROUND PLANE)
10 Hz: 94.3 dB
12.5 Hz: 100.7 dB
14 Hz: 103.8 dB
16 Hz: 108.5 dB
20 Hz: 115.3 dB
25 Hz: 120.2 dB
31.5 Hz: 123.1 dB
40 Hz: 122.5 dB
50 Hz: 121.7 dB
63 Hz: 121.4 dB
80 Hz: 121.7 dB
100 Hz: 122.2 dB

FEATURES
XLR Input/Output, Variable Phase

CABINET & FINISH
Enclosure: HDF; double walled, internally braced heavy-duty construction
Acoustic Damping: G.A.D.S. (Granular Acoustic Damping System); wool; rubber and aluminum anti-resonance lining
Internal Wiring: Kimber Kable
Finish: Satin Black or White
Grille: Magnetic beauty-baffle and fabric grille included; black fabric, magnetically attached
Outriggers: Premium heavy duty outriggers

FINISHED DIMENSIONS
27-1/4″ H x 43″ W x 21″ D (692 x 1092 x 533mm)

WEIGHT
371 lbs (168.3 kg)

ORIGIN & WARRANTY
Made in USA
Designed, Engineered, Tested and Assembled in USA from American and imported parts
Warranty: 10 Year Limited Warranty (with registration within 90 days) / 3 Year Limited Warranty – Amplifier (with registration within 90 days)

DA-2602DSP – INCLUDED AMPLIFIER
Model Name: DA-2602DSP
Series: DA Series Subwoofer Amplifiers
Amplifier Type: High Efficiency Class D w/ DSP
DSP Module: 2-channel DSP 24bit/96khz
Number of Channels: 2
Power Output Per Channel @ 8 Ohms: 2x 1300 Watts
Power Output Per Channel @ 4 Ohms: 2x 2600 Watts
Power Output Bridged @ 8 Ohms: 1x 2600 Watts
THD% 1/8 RMS: <0.05%
Frequency Response: 10Hz - 1kHz (+/- 0.5dB) with variable Low & High Pass Filters
Damping Factor: >300
Equalizer: 30 Band Parametric Equalizer (PEQ)
Adjustable Low Pass Crossover: Customizable In software
Adjustable Slope: Customizable In software
Phase Control: 0,180 Degrees. Adjustable Delay in software
Input Connectors: XLR, (RCA with Adapter)
Output Connectors: Binding Post, Speakon
Input Impedance: Balanced: 20K Ohms
Cooling System: Low noise, Variable speed fans; air flows front to rear
Protection: DC protection, Undervoltage protection, Smart overheat management, Soft startup protection, Output overload protection, Input/Output Limiters (DSP adjustable)
Power Supply: AC 100 - 240V ~ 50/60Hz
Dimensions (WxHxD): 19" x 3.875" x 11.5" (483 x 98.5 x 292mm)
Rack Space: 2 U Rack Space
Weight: 15.4 lbs (7.0 kg)
Warranty: 3 Year Limited Warranty (with registration within 90 days)