Sim2 C3X Lumis Host DLP Projector - March 12th, 2009

Sim2’s latest addition to the Grand Cinema family, the C3X Lumis Host 3-chip DLP projector, follows a different design concept. The projector and the processing circuits are separated, allowing for a more convenient connectivity for all sources, enabling the use of a single cable between the rack and the projector. The C3X Lumis Host projector is a 3-chip DLP design, featuring the latest 0.95″ DC4 DLP chipset from Texas Instruments.

Exceptional contrast ratio of up to 35.000:1 can be achieved, achieving a dramatic increase of black level performance. High end home cinema installations can now produce images of the most fantastic dynamic range available from DLP technology. The projector’s dimmable lamp allows for a full customisation of light intensity and black level, meeting the exact requirements of every custom home cinema. Sim2 C3X Lumis has a choice of three different lens options, allowing for a greater flexibility in the positioning of the projector. 

Sim2’s Host Module houses all processing electronics and can be positioned up to 250 m away from the projector itself. The Host incorporates video switching of six HDCP compliant sources and a LAN connection allows to remotely-control the projector with the use of any IP based control system. The Sim2 C3X Lumis Host projector is a true Italian masterpiece, elegantly integrating in most bespoke home cinema installations.


Filed under: Product Articles — admin @ 4:39 am

Delivering Bass in Home Cinemas - February 18th, 2009

Getting good bass in custom home cinema installations has traditionally been a hit-or-miss affair. Remedies for unacceptable situations typically included spending more money on subwoofers with a “better” driver and a bigger power amplifier. Very occasionally, some form of acoustic treatment has been employed, but most such acoustic panels were of little value at very low frequencies.

In stereo it was common to think single-mindedly of a sweet spot, and to arrange for everything to be optimum for a single listener. At low frequencies, a DSP equaliser can be used to reduce the audible excess of objectionable room resonances, thus delivering respectable bass to a single listener. However, the existence of the standing waves between and among the room boundaries ensures that other cinema seats experience different bass.

Delivering similarly good bass to everybody occupying the home cinema seating area means that the room resonances must be physically manipulated in a manner that reduces the point-to-point variations in sound pressure. Conventional acoustics attacks the problem with absorption, damping the resonances by draining energy from the offending modes, resulting in lowered pressure maxima and elevated minima. Low frequency absorption in home cinema installations is always a good idea, but it can be difficult. Traditional low-frequency absorbers were bulky devices, some of which are hostile to even progressive concepts of interior decor. They still exist, but there are some different bass-trap devices that are more elegant. The options fall into several categories, and the effectiveness of each depends on the home cinema designer’s knowledge, on where in the room to place the acoustical material or devices.

Filed under: Technical Articles — admin @ 6:51 am

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