This is easily the best sub I've ever heard. I used it in a system with planar speakers and it integrated perfectly with no lag behind the quick planars. The bass sounded so uniform that I could've sworn it came right out of the speakers themselves and not a single sub in the corner.
I had an opportunity to transition to a high quality flee watt system and I have no need for the sub any more. It was used for literally a couple weeks. The sub will come in the factory box, in the factory packaging with the factory Nuetric Cable, Power Cord and Manual--Just like new. The full two year warranty follows the sub. Write me with any questions.
From the Website:
R-528 represents the final step-up in the Serie R range and, as is REL tradition, embodies the largest model with superlative depth, scale and slam. Numbers do not tell the full story here, as the weight and power of R-528 at full output is prodigious indeed. The R-528 receives a Heavy 12™ active bass-engine coupled to a VariCone™ 12” carbon Fibre ABR passive radiator producing the equivalent of a 16” driver in an even larger cabinet. The digital power amplifier employed produces an effortless 500 watts with the aforementioned components means the R-528 is capable of underpinning speakers with quality low-frequency extension that cost ten times its own price. The R-528 is all about speed and detail as reproduced by the Heavy 12™ active driver, which is actually the fastest diver in the series with the best impulse response. Naturally, its capabilities suggest careful pairing, although it is capable of filling even grand salons with powerful, clean, fast and extended deep bass.