The Sound of Style Page 8

Bench Test: "The Sound of Style"

By Tom Nousaine

Infinity Total Solutions TSS-4000 Mirage Omnisat V2 series Polk Audio RM30
FREQUENCY RESPONSE (at 2 meters)
front left/right 124 Hz to 15.4 kHz ±2.9 dB 63 Hz to 13.8 kHz ±9.5 dB 92 Hz to 14.4 kHz ±4.1 dB
center 115 Hz to 15.1 kHz ±3.1 dB 89 Hz to 11.8 kHz ±6.3 dB 92 Hz to 15.1 kHz ±3.6 dB
surround 143 Hz to 15.2 kHz ±3.3 dB 90 Hz to 16.3 kHz ±7.9 dB 127 Hz to 12.2 kHz ±3.5 dB
subwoofer 43 to 134 Hz ±2.1 dB 31 to 101 Hz ±2.0 dB 36 to 113 Hz ±2.1 dB
SENSITIVITY (SPL at 1 meter with 2.83 volts of pink-noise input)
front left/right 87 dB 88 dB 91 dB
center 87 dB 83 dB 91 dB
surround 87 dB 82 dB 87 dB
IMPEDANCE (minimum/nominal)
front left/right 3.8/5 ohms 4.0/6 ohms 3.0/5 ohms
center 3.8/5 ohms 3.2/5 ohms 3.0/5 ohms
surround 4.0/6 ohms 4.4/6 ohms 3.5/6 ohms
BASS LIMITS (lowest frequency and maximum SPL with limit of 10% distortion at 2 meters in a large room)
front left/right 80 Hz at 73 dB 80 Hz at 89 dB 80 Hz at 90 dB
center 80 Hz at 73 dB 80 Hz at 88 dB 80 Hz at 90 dB
surround 80 Hz at 67 dB 80 Hz at 71 dB 100 Hz at 76 dB
subwoofer 25 Hz at 87 dB 20 Hz at 82 dB 25 Hz at 82 dB
average SPL from 25 to 62 Hz 98 dB 104 dB 100 dB
maximum SPL 107 dB at 62 Hz 109 dB at 62 Hz 107 dB at 62 Hz
bandwidth uniformity 91% 95% 94%

All of the curves in the frequency-response graphs are weighted to reflect how sound arrives at a listener's ears with normal speaker placement. The curve for the left/right front channels reflects response averaged over a ±30° window, with double weight at 30° (the most typical listening angle). The center-channel curve reflects response averaged over ±45°, with double weight directly on-axis of the primary listener. The surround-channel curve shows response averaged over ±60°, with double weight at 60° because most sound from these speakers will reach the listener after reflection from room walls. Each subwoofer's bass limits were measured with it set to maximum bandwidth and placed in the optimal corner of a 7,500-cubic-foot room. In a smaller room users can expect 2 to 3 Hz deeper extension and up to 3 dB higher sound-pressure level (SPL).

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