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REL No25 Subwoofer

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Reference Defined

BEAUTY, POWER & SPEED

No. 25 combines the power of an ultra-reliable 1,000 watt amplifier, with a lightweight and perfectly balanced carbon fibre 15” driver. All this is controlled by our legendary filter sets and proprietary crossovers with 2 separate parametric equalizers permitting remarkably flat in-room response, while maintaining the speed and resolution for which modern RELs have become known.

We want our customers to enjoy all this performance without being limited to only a few room locations, so we built-in our legendary LongBow™ wireless receivers into every No. 25. This design utilizes zero compression, resulting in stunning dynamics and bass extension without being tethered to a cable, while delivering sound quality comparable to our competitor’s hardwired designs. It’s just another example of how we strive to offer complete and thoughtful solutions.

Functional Curves

CLARITY FROM STRENGTH & ELEGANCE

No. 25 marks a new standard in cabinet execution, both for its physical beauty and the manner in which it manages the critical backwave propagating from the rear surface of the massive 15″ carbon fibre piston at its heart. The shape of No. 25 is designed to disturb and cancel much of the incredible force created by the inward stroke as No. 25 reloads for your music or film’s next set of demands. It is necessary to keep this backwave as silent as possible, while allowing the driver to “breathe” without compressing dynamics. The curvilinear cabinet walls deflect, diffuse and dissipate these waves into smaller cross plane waves. Minimizing rear waves that eventually emerge as comb filtering — noise that cancels the primary bass — is what creates clear, purposeful bass that strides into a room with tremendous energy and clarity.

Comprised of 30mm thick (about 1 1/8″) Australian MDF, transected by hardwood spars that break up common mode resonances within the top surface of the cabinet and down its sidewalls, our bracing is not unlike the spars in a ship’s hull. Some may view this as excessive, but these are the lengths our design team goes to to deliver the finest subwoofer extant, fully fitting of the title No. 25.

Reproducing Perfection

NATURAL FLOOR TO CEILING BASS

When we experience bass in real time out in the world, it occurs with height to it. It strikes our sinuses, it kicks at our chest cavities, it rumbles along the floor conveying power authority and majesty. Our Reference Line Arrays permits bass to emerge more naturally, adding a height component in how it propagates throughout the room. The bottom unit reinforces the deepest overtones, creeping and rumbling across the floor to produce room shake. The middle location provides crisp attack and articulation of kick drums or any transient-based event. The unit imparts the flutter and shimmer of all manner of instruments floating in air. Making Reference Line Arrays the Holy Grail of the REL experience and is only available with our Reference products.

Since 90 percent of the energy produced by a system resides in the bass regions, Reference Line Arrays are the magic element missing from so many otherwise state of the art systems. This air, transparency and, of course, effortless power that Reference Line Arrays convey can’t be imagined, it can only be experienced in person.

Agile Power

SCALABLE BASS, FROM WHISPERS TO BOOM

It takes huge power to invest the No. 25 with the shattering dynamics of which it is capable. The rugged beast of a 1,000 watt NextGen3 amplifier that powers No. 25 has already proven itself in the field in one of our previous designs, making us comfortable with not only its startling sonic performance but also its reliability.

However, No. 25 is no mere exercise in excess, but rather a thorough exposition in the art of rendering sub bass, totally, completely and with great deftness in tonality, expression and dynamics. It is this ability to not merely play loud, but to bring to life the contrast between loud and soft passages that makes REL owners so passionate about our designs. After all, dynamics are not merely the ability to play loud, but to bring to life the contrast between loud and soft passages in music or film. Ultimately, this is what makes the No. 25 the addiction it quickly becomes.

Rigid Speed

A CARBON FIBRE CORE

No. 25 has a heart of pure carbon, as we opted for a cone material that is stronger than steel, yet incredibly light. Carefully woven from pure carbon fibre, No. 25’s 15” cone structure weighs 70% less than a 10” cone of just two years ago. This combination of incredibly light weight coupled to remarkable structural integrity is what gives No. 25 its combination of speed and power.

Yet another benefit of the weight reduction strategy we employ is that it permits near-perfect dynamic balancing of the driver, yielding ideal behavior throughout its incredible 4” of fore-and-aft stroke.

Specifications
TYPE Closed box, front firing driver
ACTIVE DRIVER SIZE & MATERIAL 15 in., 380mm long throw, carbon fibre cone with inverted carbon fibre center cap
PASSIVE RADIATOR SIZE & MATERIAL N/A
LOW FREQUENCY EXTENTION -6dB at 15 Hz
INPUT CONNECTORS High Level Neutrik Speakon, Low Level stereo RCA, LFE RCA, LFE XLR
OUTPUT CONNECTORS High Level, Low Level RCA, Balanced XLR, Daisy Chain Outputs
POWER OUTPUT 1,000 watts (RMS) Ultra High-Current Power Supply
AMPLIFIER TYPE NextGen3 Class D
WIRELESS CAPABILITY Longbow (Optional) Zero Compression Individual discrete D/A and A/D Encoders
Protection System
FULLY ELECTRONIC SET SAFE Yes
D.C. FAULT Yes
OUTPUT SHORT Yes
MAINS INPUT VOLTAGE 220-240 volts, 110-120 volts for certain markets
FUSES 7 Amp semi delay 230 volts operation, 15 Amp semi delay 115 volts operation
Dimensions
W X H X D 29 x 21.3 x 30 in. (736.5 x 540 x 762 mm)
NET WEIGHT 168 lbs. (76 kg)
FINISH Piano Black Lacquer 12 coats
Supplied Accessories
MAINS LEAD Yes
NEUTRIK SPEAKON Yes
INTERCONNECT Yes
USERS MANUAL Yes

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REL No25 Subwoofer




Nintronics offers generous trade in prices to help make your next upgrade as seamless as possible, while greatly reducing the overall price of your purchase. Depending upon the items involved, Nintronics will be happy to send out one of our nationwide installation engineers to collect your traded in items and unbox, setup and calibrate your new equipment.

REL No25 Subwoofer

"Please include age, condition, make, model and serial numbers of the units you wish to trade in. Please note if you have the original accessories, boxes, invoice etc... This will help with increasing your trade in value."




Nintronics Ltd, Unit 7, Martinfield Business Centre, Welwyn Garden City, AL7 1HG
Tel: 01707 320788 Email: sales@nintronics.co.uk

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