hellomans@yahoo.com
PLEASE TELL ME WHAT YOU THINK.
Sweetwater, TX 79556
United States
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's M2200 and M1100, simply twice as effective as any other
commercially available sub-bass solution. BGW "plug 'n play" subwoofer systems seemlessly
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. Two critically acclaimed BGW GTA
output modules, housed in a custom 144 cfm, servo-controlled fan enclosure, provide 1900 Watts
of continuous power, almost 3 horse 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" MDF composite, with 2" MDF forming the baffle, while
the M1100 uses Baltic birch plywood. Generous porting reduces distortion and power compression.
Both enclosures are tuned to 30 Hz. Ample internal bracing further stiffens the enclosure and
eliminates resonances. The amplifier/processor assembly is housed in a separate chamber on the
recessed back panel. For safety, protective corners and 14 gauge steel speaker grills are included on
all models.
Protection
BGW self powered subwoofer systems have several
major types of protection features unobtainable with
conventional systems. The processor board common to
both units 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 the M2200 and M1100 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 avalible 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.
After more that a year of field experience, BGW Engineers added an additional limiter circuit before
the filters to prevent operator misuse. This limiter prevents excessive signals from reaching the filters
and destroying their bandpass characteristics.
Benefits
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.
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."
Both models also include 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. Go for the Best... Go for BGW.
Warranty: The entire system is covered to the end user for one year from date of sale. Speakers
are covered for defects in manufacturing . Prolonged use at excessively high sound pressure levels
can result in permanent hearing loss and damage to the loudspeaker drivers.
M2200
Power ...................... 2800 Watts IHF
............................ 1900 Watts Continuous
Amplifier Class ............ AB+B (low quiescent)
Usable Frequency Response .. 25Hz to 180Hz
Maximum output (1m) ........ >130dB SPL above 40Hz
Electronic Crossover ....... SwitchSet(TM) 24dB/octave
(LinkwitzRiley filters) frequencies selectable at
63, 71, 80, 89, 100, 112,
125, 140, 160, and 180Hz
Summing Amp ................ Electronically sums dual
inputs to mono
High Pass Output ........... Post-summing amp single
ended output on barrier
strip, follows crossover
setting
Sensitivity ................ Adjustable from -10dBm to
+16dBm (0.245V to 5.0V)
with hi-rel locking shaft
control
Input Limiting ............. Active above +16dBm
Remote Power-On ............ Contact closure or 15VDC,
opto-isolated
Power Requirements ......... 50-60Hz, 100-120 VAC,
30 Amps max, 16 Amps
nominal; or 220-240 VAC
16 Amps, 8 Amps nominal,
with universal voltage
transformer
Cabinet Construction ....... 1-inch MDF, 2-inch MDF
baffle, texture coat painted
finish with stackable corner
protectors
Grille ..................... 14 gauge perforated steel
Electronics Module ......... 26 x 23 INCHES, with two
72CFM fans mounted over
amplifier heatsink
Fan Control ................ Variable speed, off at idle
Dimensions
Inches (HxWxD) .......... 35.00 x 42.75 x 31.00
Centimeters (HxWxD) ..... 88.9 x 108.6 x 78.7
Net Weight ................. 376 lbs (177 kg)
M1100
Power ...................... 1400 Watts IHF
............................ 950 Watts Continuous
Amplifier Class ............ AB+B (low quiescent)
Usable Frequency Response .. 25Hz to 180Hz
Maximum output (1m) ........ >124dB SPL above 40Hz
Electronic Crossover ....... SwitchSet(TM) 24dB/octave
(LinkwitzRiley filters) frequencies selectable at
63, 71, 80, 89, 100, 112,
125, 140, 160, and 180Hz
Summing Amp ................ Electronically sums dual
inputs to mono
High Pass Output ........... Post-summing amp single
ended output on barrier
strip, follows crossover
setting
Sensitivity ................ Adjustable from -10dBm to
+16dBm (0.245V to 5.0V)
with hi-rel locking shaft
control
Input Limiting ............. Active above +16dBm
Remote Power-On ............ Contact closure or 15VDC,
opto-isolated
Power Requirements ......... 50-60Hz, 100-120 VAC,
15 Amps max, 8 Amps
nominal; or 220-240 VAC
8 Amps, 4 Amps nominal,
with universal voltage
transformer
Cabinet Construction ....... 3/4-inch void free baltic
birch plywood, carpet wrapped
with stacking corner protectors
Grille ..................... 14 gauge perforated steel
Electronics Module ......... 19 x 19 INCHES, with
72CFM fan mounted over
amplifier heatsink
Fan Control ................ Variable speed, off at idle
Dimensions
Inches (HxWxD) .......... 27.875 x 32.75 x 28.6
Centimeters (HxWxD) ..... 70.8 x 83.2 x 72.7
Net Weight ................. 190 lbs (81.7 kg)
