Infinity Modulus II Home Theater Speaker System [AIG Archives]

      Date posted: September 12, 2008

Infinity Modulus II (black)

Sugg. Retail: $1995.95 (CAN)
Distributor: Erikson Consumer,
21000 Trans-Canadienne,
Baie D’Urfe, QC H9X 4B7
(800)-567-3275 FAX (514)-467-5507

From the Fall 2005 Audio Ideas Guide

Here we have a compact combination of four identical satellites, a centre channel, and a subwoofer, all compact and stylish, the sub remarkably small for its bass extension. According to the manual, “With their versatile design, the satellite speakers can be placed virtually anywhere on shelves or stands, or mounted on a wall using the supplied base.”

That base is swivel-mounted to the bottom of the speaker so that it can provide vertical stand or wall mounting easily, especially for anyone who has already run speaker cables through the walls to the appropriate locations. All are very stylish, with grey enclosure with silver accents on the baffle, which is very small.

The drivers use what Infinity calls Ceramic Metal Matrix Diaphragms (CMMDTM), which are “stiff, yet light, and have high internal damping (damping is a material’s ability to absorb energy).”

“To ensure that Modulus II loudspeakers will sound exceptional in even the most unexceptional listening environment, Infinity has developed the proprietary Room Adaptive Bass Optimization SystemTM.” Called RABOS for short, it involves a CD that can be used to provide a series of bass frequencies to calibrate the subwoofer below 80 Hz to operate smoothly in any room. RABOS has it own remote control with a built-in microphone and LED frequency display that allows the user user to calibrate the sub at the listening position in a half-hour or less. Another thing to note is that there are no speaker-level inputs, a pair of RCAs the only access. The subwoofer has a rotary control to set its frequency range, as well as one for level, both on the rear channel. A RABOS Template booklet, with 6 different calibration charts, allows one to measure the bass frequency response by noting the levels from 20 to 100 Hz and joining the dots during the calibration process. This is an innovative subwoofer tuning feature, essential in many rooms.
Infinity Modulus II (frequency response)
In our case, the subwoofer delivered exceptional performance, +/- 2 dB in its highest crossover setting, but more than 32 feet of length in my room to allow bass to develop its large wavelengths certainly helps. The other settings, mid and lowest, were also exceptional, the latter sacrificing a bit of level (which can easily be raised to match the satellites), but also very flat, as the bottom curve at left on the graph shows. Working with the satellites, the wide open curve seems ideal for my room, though there will be different tunes for different rooms, which is what RABOS is all about.

The measurement curves for the satellites show that they are voiced for smaller rooms, being a compact system, with a gentle rolloff in the top end to not be completely in your face in the highs. Interestingly enough, the centre channel’s midrange is somewhat flatter (shown below the satellites), so voice and other centre channel information should be well articulated. The centre also maintains excellent dispersion, like the satellites. So, though the system rolls off a bit in the upper midrange and highs, it has full extension to 20 kHz and the mating of subwoofer and satellites is virtually ideal. The irony of the large amount of engineering that developed RABOS is that it isn’t really needed in better rooms, the subwoofer providing (as seen) superb low end extension and smoothness. However, in difficult rooms it can provide the extra tweaking to make thesystem sound its best. I listened to the Modulus system with several components, including the Harman/Kardon receiver and Anthem multichannel preamplifier, and was impressed by the smooth and dynamic performance of the systems, as heard through the Infinity HT speakers. It had excellent transient response, a normal virtue of smaller drivers in compact enclosures, but especially true here because of the CMMD cone composition’s rigidity and freedom from distortion. And with an especially fine subwoofer, the Infinity Modulus II system ranks very high overall among compact home theatre speaker systems we have measured and auditioned.

Andrew Marshall

Infinity Modulus II

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