REL S/510 Serie S Subwoofer



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SKU: S/510 Category:


S/510 takes REL’s compact-medium chassis concept to reference-like levels of performance and does so with style, power and incredible speed. It delivers incredible levels of all ‘round performance. S/510 allows those with less space, or when pairing with high-end speakers that are slightly less robust to have a perfect dance partner when the S/812 is simply too much of a great thing.

Compact Package

For S/510, every aspect of the previous generation’s inner workings was examined without regard to its critical and customer-driven success. REL turned a fresh eye to power requirements, driver improvements, and specialty filters, upgrading each to extract all the extra performance possible. All this alongside the cabinet refinements necessary for those upgrades to emerge cleanly. This latest S range is a triumphant development that has exceeded every expectation of REL’s design team.

The requirements were for far stronger deep bass output between 20-35 Hz, vastly improved theatre dynamics, and an even more open and spacious sound field which benefits both music and film. REL turned to their NextGen3 amplifier (tuned to 500 watts with substantial reserves of power), added a light film of carbon fibre to the rear of the driver to handle the extra power, and developed two new sets of custom filters to extract the utmost in brute force and spaciousness. Finally, they imbued the S/510 with the ability to be stacked in 4- or 6-unit line arrays, just like their reference models.

S/510’s Bass Engine

S/510 required upgrades to its ContinuousCast™ Alloy Cone to allow it to survive its massive power upgrades. To permit its thin, aluminium cone to survive 500 watts and incredibly long-stroke, REL added an ultra-lightweight backing of pure carbon fibre strategically placed over portions of the rear surface of the cone. This produces two benefits; it strengthens and stiffens the cone and also eliminates reversion, wherein the back wave inside the cabinet is now prevented from interfering with the main launch of bass into the room. The result is more accurate and far louder deep bass.

Superprogressive™ Passive Radiator

REL’s uniquely tuned passive radiators use special suspensions, now with an additional 8mm of linear travel, to produce performance unlike conventional subwoofers. The new SuperProgressive™ passive radiator produces extremely long travel allowing for very loud output while retaining the variable stiffness of its suspension. This allows it to act like a sealed box compact 12” design at low volumes and a high output 14” design at its limit.

NextGen3 Amplifier

At 500 watts the NextGen3 amplifier is borrowed from REL’s former flagship model and produces huge reservoirs of power and current. The 20%+ increase in power (the previous version was 400 watts) is needed to deliver the high output levels needed for modern theatre, as well as to produce the extremely deep bass in a high-end 2-channel system. This increase in power is necessitated by the development on the musical front of an all-new circuit termed PerfectFilter™ that balances both frequency extremes.

PerfectFilter performs two seemingly disparate qualities; extending the strong, even response of the extreme low end of bass frequencies while simultaneously opening up air and delicacy in the middle and high frequencies of one’s system. Additionally, REL has applied customized PureTheatre™ filters to allow S/510 to keep up with modern theatre effects without breaking a sweat.

Key Features

  • Front-firing active woofer, down-firing passive radiator
  • New PerfectFilter™ delivers increased output and deeper bass
  • 10″ long-throw ContinuousCast™ alloy active driver with added carbon fibre backing for increased stiffness
  • 12″ passive radiator with additional 8mm travel over old
  • 20Hz at -6dB in-room response
  • 500 watts (RMS) NextGen3 Class D amplifier
  • Wireless capability with optional AirShip transmitter
  • Stackable up to 3 units high for ultimate line array performance


Type: Front-firing active woofer, down-firing passive radiator
Driver: 10″ (250mm) long-throw, die-cast aluminium chassis
Passive Radiator: 12″ (300mm)
Low-Frequency Extention: 20Hz at -6 dB
Inputs: High-Level Neutrik Speakon, Low-Level stereo RCA, LFE RCA, LFE XLR
Outputs: Hi Level Neutrik Speakon, LFE RCA, LFE XLR
Power Output: 500 watts (RMS)
Amplifier Type: NextGen3 Class D
Wireless Capability: REL AirShip system sold separately
Dimensions (WxHxD): 400 x 410 x 464 mm
Weight: 31.7 kg

Critic Reviews

“Updated and more powerful design that brings depth and a high level of subtlety – a great addition to any hi-fi setup” Click for full review