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The Bag End INFRASUB-18 is a self powered subwoofer system employing a direct radiating 18" cone loudspeaker in a sealed enclosure and a 400 Watt power amplifier mounted to an aluminum plate on the back of the enclosure. The amplifier also includes a built in INFRA dual integrator providing a flat acoustical response down to 8 Hertz, well below the audible range of human hearing.
INFRA™ DESCRIPTION:
The INFRA ® driver is operated below resonance and flattened
with an
electrical boosting circuit, the INFRA® dual integrator. Below
resonance the INFRA® system exhibits predictable, uniform response
and
reproduces each note with the same emphasis, reducing the influence of
the resonances found in conventional above resonance bass systems. In
addition, the use of a low pass filter is eliminated (and with it the
associated long variable delay) and replaced with the INFRA ® dual
integrator with its short uniform delay.
Upon close listening, it is clear that the impression of power and
impact is greater with an INFRA ® system when compared to
conventional
bass systems. This is true even when the two systems will measure the
exact same SPL on a calibrated dB meter. This is because the INFRA
®
subwoofer maintains the bass energy in a tight packet, aligned with the
upper range signal, providing a greater body impact and a seamless
musical connection with the main loudspeakers.
Objectively, the INFRA ® system meets within the Time-Align®
specification and exhibits superior frequency and phase response.
Applications:
- Home Stereo
- Home Theater
- Project Studio
Specifications:
| Enclosure: |
3/4" MDF
|
Low Frequency Transducer:
|
EL-18P 18" Cone |
Amplifier Output Power:
|
400 Watts continuous sine wave |
INFRA Module:
| Patented 8 Hz dual integrator |
System Type:
| 3 cu. ft. Sealed box |
| Driver Nominal Impedance:
| 4 Ohms |
Input Connectors:
|
Left, Center, and Right channel line level RCA jacks
|
| Output Connectors: |
Left and Right speaker level spring terminals |
Hi-Pass Outputs:
| Left, Center and Right channel line level RCA jacks |
| Hi Pass Filter:
| 12dB per octave, -6dB at 95 Hz |
Frequency Response:
| +/- 3dB 8 Hz to 95 Hz (2 pi Steradians) |
Overload Protection:
| Preset threshold Concealment™ circuitry
|
Fuse:
| 6.3 Amp GDC time-lag |
Finish:
|
Black textured paint |
Grille:
|
Black nylon cloth on frame |
Magnetic Shield:
|
Low flux leakage |
Dimensions:
|
23.5"h x 21.5"w x 18.5"d
59.7 cm x 54 cm x 46.3 cm
|
Weight:
|
91 lbs. (41.05 kg) |
Shipping Dimensions:
|
30" x 27" x 23.5"
74.3 cm x 67.3 cm x 59.1 cm |
Shipping Weight:
|
103 lbs. (46.72 kg) |
For more information, click here [PDF] | 
