Dynaudio Sub 500 Piano Black.

We have 1 each of Dynaudio's Sub 500 Sub-Woofer for sale.  This unit was in my personal system. It's a Demo unit. 
The Dynaudio SUB 500 reproduces deep bass with a natural yet powerful balance. Its incredible low frequency response is due in part to the new 30 cm (12") long-throw woofer developed for this model, which also features an extremely rigid die-cast aluminium frame, geometrically optimized for optimum air flow, a large diameter aluminium voice coil and a powerful magnet system. The SUB 500 employs a 250W integrated amplifier module that also uses Dynaudio's advanced CEC (Cone Excursion Control) technology. The CEC circuitry continuously monitors the incoming signal to derive the most efficient power delivery, allowing the SUB to play deeper, louder and deliver higher dynamics with lower distortion than conventional subwoofer designs quoting even much higher power ratings.The anti-resonant driver is coupled to the cabinet on a stiff metal baffle that is itself fused to the rigid MDF cabinet through a sheet of special damping material. This multi-layered sandwich construction further minimizes resonance and the detrimental effects of such. The included remote control allows all subwoofer settings - phase, level, crossover frequency, and extended bass mode - to be both adjusted and stored right from the listening position.Four fully programmable presets each can store all parameter settings into the subwoofer memory, allowing for independent settings for music, movies, late night or party modes, for example, while allowing each to be simply recalled at the touch of a button. The memory functions are also able to be write-protected through a switch on the back panel so that they are not accidentally re-programmed.Almost all subwoofers require trips back-and-forth to the subwoofer during setup and tuning. The solutions on offer in the Dynaudio SUB 300 and SUB 500 models are extremely intuitive, as these models come supplied with a remote control handset through which all subwoofer parameters can be adjusted and set from there where it matters most: the listening position. In these models, output level, phase selection (0º, 90º, 180º, or 360º), crossover frequency selection (60 Hz, 80 Hz, 100 Hz or Flat), extended bass mode (On, Off) and memory presets (1, 2, 3, 4) are all under direct fingertip control.The four fully programmable presets on the remote can each store all parameter settings into the subwoofer memory. Therefore, it is easy to switch from settings ideally suited to a subtle music concert to those more tailored to a gut-wrenching action film. Recording engineers handle sub-bass in quite a different manner between these genres, requiring different settings for fully optimizing the playback of each. The presets can also be used to suit a particular listening scenario, e.g. to remain civil with the neighbors, one could also program in a preset suited for late night listening.

There is also a consideration to be made for better bass as opposed to strictly more bass. Dynaudio has paid great attention to matters affecting the quality of the low frequency response in the sub-bass region. One qualitative approach is to combine multiple subwoofers into a system to achieve an improved bass response. By incorporating multiple subwoofers in a system it is possible to precisely balance out the unavoidable bass nodes one would typically experience through utilizing a single subwoofer in any given room. Bass notes become less directional, and dynamic headroom is increased, even at extremely high sound pressure levels. With multiple subs, placement close to a wall poses no concern. When using multiple subwoofers in a system, a more controlled, more balanced and more precise sub-bass response is easily achieved, and a substantially larger quality-optimized "sweet spot" is realized.

Problems that even expensive electronic room-correction systems or elaborate room treatment could not solve are now easily correctable as well. The most common multiple-sub setup would consist of dual woofers - usually one each positioned adjacent to the left and right mains respectively up front, or one placed up front and another behind the listening area. Either setup will yield a much more balanced bass response when compared to a single sub installation in the same room. The Master/Slave function facilitates doing so in a very convenient manner.More ambitious systems can be easily comprised - such as 5.5 or even 7.7 multi-channel setups, for example. To facilitate the multiple-sub set-up, one subwoofer is defined as the "master" unit and another as the "slave" unit, where the settings for the master subwoofer will be automatically programmed into the slave. A single cable connects each subwoofer to the next, whereby all subwoofers in the chain will follow the settings of the master subwoofer without requiring individual adjustments to the slave units themselves.The EXT (extended bass mode) function is useful on material containing extreme sub-bass information. As there is very little source material available that will reach these low frequencies, the normal bass setting will provide full performance with most material and at the same time allow for very high sound levels.