Product Info

BGW... 30 Years of Innovation.

Systems Approach...
Since 1971, BGW has been dedicated to excellence in professional audio amplifier design. Since Universal's Sensurround and the disco craze, BGW has been shaking audiences. Our products offer the best possible reliability and sound quality - a true engineer's amplifier. The tradition continues with BGW's introduction of the complete sub-bass solution.

Demands for high level sub-bass place enormous requirements on separate system components. Typical subwoofer systems display mismatched load impedances, wasted power in cabling, and inadequate protection schemes, often resulting in failure of drivers. BGW recognized the need for a complete systems solution. The results are BGW M2200 and M1100 self powered subwoofer systems, simply twice as effective as any other commercially available sub-bass solution. BGW "plug 'n play" subwoofer systems seamlessly integrate into any existing installation, to create an awesome musical experience.

Conservative Design
BGW Engineers started with our largest Grand Touring Amplifier, the GTA. This 78 pound monster is an ideal power source for subwoofers with its enormous stored energy capacity of 340 joules, and peak output current capability of 37 amperes per channel. One critically acclaimed BGW GTA output module, housed in a custom servo-controlled fan enclosure, provide 950 Watts of continuous power.

The speakers used in both models were designed especially for this application. Each 15" driver uses a 4 ohm, copper edge wound voice coil. Two speakers are driven in parallel from each GTA amplifier module to optimize amplifier to speaker power transfer. The drivers are rated at 600 watts each, matching the available amplifier power of 1400 watts IHF per module. A special rubber surround and rugged spider result in exceptional excursion capability. Following BGW's long tradition of modular designs, the 16 pound magnetic structure is attached to the cast aluminum speaker basket with three bolts, allowing for quick replacement of the entire moving assembly. There is no need to replace the entire speaker, or send drivers out for re-coning.

The M2200 enclosure is fabricated using 1-inch MDF with 2-inch MDF baffle. It comes with a texture coat painted finish standard and with stackable corner protectors. A castor plate, rear cover and Baltic birch construction with carpeted finish are standard on the touring version - the model M2200T. The M1100 enclosure is fabricated using Baltic birch plywood in a carpeted finish also with stackable corner protectors. Lik the M2200T, the M1100T comes standard with a castor wheel front cover and rear cover plate. Generous porting reduces distortionand power compression. All enclosures are tuned to 30Hz. Ample internal bracing further stiffens the enclosure and eliminates resonances. The amplifier/processor assembly is housed in a separate chamber on the recessed black panel. For safety, protective corners and a 14 gauge steel speaker grills are included on all models.

We've Got you Covered
BGW self powered subwoofer systems have several major types of protection features unobtainable with conventional systems. The processor board includes a clipping eliminator circuit, excursion limiter circuit, additional limiter circuit, fixed high pass, and adjustable low pass filters.

The clipping eliminator circuit prevents square waves from reaching the speakers and causing voice coil overheating. The circuit is capable of handling input levels up to 16dBm.

The excursion limiter integrates the voltage applied to the speakers during each musical transient and reduces the gain instantaneously once the speaker's excursion limit is reached.

Ported enclosures are used in all BGW subwoofer systems. All ported boxes have the characteristic of unloading the drivers below their cut-off frequency. When unloading occurs, the speaker cones can be ripped right out of their baskets. BGW uses a steep, fixed frequency, high pass filter to prevent out of band (subsonic) signals from reaching the drivers and damaging them. This filter is a 4 pole design with a Q of 1.3, which provides 3dB of boost and 24dB/octave slope.

To allow a wide range of speaker systems to work well with BGW self powered subwoofer systems, we have provided a choice of 10 adjustable low pass filter frequencies from 63 - 180Hz on 1/6 octave ISO centers. The compliment to the high pass filter is available on the units terminal strip, as a single ended output. Exact and repeatable selection is provided using sliding step switches located on the processor panel. The M2200 and M1100 also include an additional limiter circuit before these filters in order to prevent operator misuse. This limiter prevents excessive signals from reaching the filters and destroying their bandpass characteristics.

Active is Just Plain Better
By eliminating long speaker cables, high damping factors are preserved, and power loss in cabling is eliminated. For example, with 100 feet of 12 gauge, 2 conductor speaker cable, the damping factor is reduced from 250 (8ohm load) to 22! To maintain a damping factor of 50, number 5 wire would be required! Clearly the advantages of putting the amplifier in the speaker cabinet can make a major difference in the overall sound quality.

The benefits of bi-amplification in a multi-way audio system can be stunning, with a tremendous improvement in the headroom of the amplifier powering the midrange speakers, and a wonderful clarity as the midrange speakers do not have to struggle to reproduce the lowest frequencies along with the highest. The Linkwitz/Reilly characteristic crossover results in an even splice between subwoofer and mains in critical locations throughout the room.

Installation of BGW self powered subwoofer systems is simplified through the use of summing amplifier inputs. Balanced, line level, wideband signals from the system's stereo mixer are connected via XLR type connectors, making it "plug-and-play."

The M2200 and M1100 also includes a high powered relay for remote control of system power. A remote mounted LED can be used for a power-on indicator as well.

You Deserve a Great Performance
No matter what your application, if your performance is critical, then you deserve BGW Power. No other manufacturer gives you as much acoustical power for the money as BGW... relied upon throughout the world.

Like Nothing Else
There is nothing else on the market that can compare to the BGW M2200 and M1100 self powered subwoofer systems. Their performance whether in cinemas (THX approved), nightclubs, studios, theme parks, churches or touring rigs is unparalleled and their price is much less expensive than piecing out the components separately.

BGW... 30 Years of Innovation.

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Effective October 20, 2003, BGW Systems has been acquired by Amplifier Technologies, Inc. All engineering, design, manufacturing, sales, marketing and administration will now be handled by Amplifier Technologies, Inc. All correspondence/inquiries regarding The New BGW should be made to:

Amplifier Technologies, Inc.,
1749 Chapin Road
Montebello, California 90640.
Phone: 323-278-0001
Fax: 323-278-0083
Email: