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REL Reference: No. 25 Subwoofer


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REL Reference: No. 25 Subwoofer
No. 25
Reference Series

No. 25 commemorates and celebrates REL Acoustics' quarter century of building the finest sub bass systems, while pointing to the future and their next 25 years as it employs their most advanced design, engineering and craftsmanship.

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 their 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.

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 their design team goes to to deliver the finest subwoofer extant, fully fitting of the title No. 25.

Technical 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
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
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
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

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Availability Retail (inc. 20% VAT)
£ 6,500.00
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