Bag End INFRA-MX2

Feb 17, 2004 12:00 PM, Editors

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Bag End’s newest generation of bass signal processors—the INFRA-MX2—offers numerous new features, including improved grounding scheme, use of surface-mount technology, included improved power supply with improved error tolerance, able to produce a flat response down to 8 Hz and an improved graphic design.

The dual-processor technology operates a subwoofer below resonance without the use of lowpass filters, eliminating filter delay, impedance bumps and other irregularities. In the INFRA technology, the electrical signal goes through the INFRA electronics before the power amplifier, as it would with a conventional electronic crossover. Inside the INFRA electronics, a slope is applied to the signal by the use of dual integrators lifting the low frequencies by 12 dB per octave.

The INFRA loudspeaker is placed in a small enclosure providing a relatively high system resonance for a subwoofer. The system's response without the INFRA electronic drive will rise at 12 dB per octave up to its resonance frequency and then flatten out until the woofer reaches its upper limit. When INFRA drive is applied, the 12 dB per octave roll-off of the cabinet combines with the 12dB per octave lift of the electronics to form a flat frequency response down to the lowest point set on the INFRA electronics, which can be as low at 8 Hz. Above resonance, the loudspeaker would normally respond flat up into the midrange. With INFRA drive, the dual integrators roll-off at 12 dB per octave from the system resonance or the point where the speaker would normally run out flat.

There are no lowpass filters in INFRA technology. Therefore, there is no filter delay. Below resonance, the impedance, cone excursion and dampening factor are uniform and predictable. Thus, the reaction time, controllability and the ultimate fidelity of the loudspeaker are improved. The spatial offset between the INFRA system and the upper-range loudspeakers is minimized, providing a seamless match.

"The result is a conveniently sized subwoofer with a highly musical and precise extended low-frequency capability," commented James P. Wischmeyer, Bag End president. "To boil it all down to one concise phrase, INFRA technology makes a bass system simpler, smaller and—at the same time—makes it sound better."

Suggested retail price for the INFRA-MX2 processor is $1,390. For more information, visit www.bagend.com. For more new product announcements, visit mixonline.com/products_new_products/index.htm.






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