BG Radia BGX-4850 Review Mcalester OK
Oklahoma City, OK
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Oklahoma City, OK
BG Radia BGX-4850 Review
August 10, 2009 By Gary Altunian
Or: What happens when you put 48 Subwoofers in a wall
BG Radia and THX, with the BGX-4850, have developed a subwoofer system that neatly overcomes many of the acoustic problems with getting good bass in a room and produces deep, extended and well-distributed bass that sounds tight and solid with music and movie sources.
And they did it with 4-inch drivers. Ok, a lot of 4-inch drivers.
If I learned to play just one musical instrument, it would be the acoustic bass. I love bass—deep, solid, tight, extended bass. Soft, flabby bass just annoys me. So does so-called ‘“one-note bass.” If the bass isn’t right, nothing sounds good
For various reasons, getting good bass is one of the most difficult challenges in setting up a stereo or home theater system. For example, bass frequencies cause walls, floors and every object in a room to vibrate, and each of these things creates their own sound, coloring the sound of the bass. Bass frequencies also create room nodes, areas where sound waves collide to amplify or attenuate the bass at certain frequencies. This leads to uneven peaks and dips in bass response depending on your listening position.
Carefully chosen speaker and subwoofer placement is one solution, although it is difficult to achieve the best bass. Another solution, though often somewhat aesthetically unappealing, is room acoustic treatments.
Of course, there is another way...
How to Install 48 Subwoofers in a Wall
The BGX-4850 is designed as an in-wall subwoofer system, although an in-room option is in the works. The system consists of four SM-1250 subwoofer modules and an outboard amplifier, the BGA-2104, to power the modules. Each sub module has 12 4-inch drivers arranged in pairs that result in totally vibration-free performance, which is critical for in-wall installations. Each woofer is isolated in its own chamber.
These chambers are made of BMC (bulk molding compound), a strong, dense material widely used in automotive and electronics applications. BG Radia and THX claim that the 48 4-inch woofers have the equivalent surface area of two 18-inch woofers. Based on my listening tests, I can’t dispute their claim.
The woofers are arranged in pairs that face each other and thus cancel vibrations caused by the motion of the woofers. Vibrations are almost undetectable even when touching the metal frame that houses each bass module. Vibration-free performance is critical for room isolation and to prevent wall rattles.
The modules can be installed in existing walls or in new construction and are sized to fit in 3 .75-inch deep standard residential walls, with 16–inch, on-center stud spacing. BG Radia offers a 15–inch-wide grille for retrofit installations and a 7–inch-wide grille for new construction. Each grille is available in black or white and can be painted to match almost any room décor.
The BGA-2104 is an ICE-powered digital amp with 2 x 1100 watts and DSP equ...