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Ultima Voice2

Owner’s Manual

SPECIFICATIONS

Specifications Value Definition

Sensitivity 89.0 dB SPL with 2.83 V @ 1m (4 π

anechoic)

Indicates the amount of power the associated power amplifier must deliver to

drive the loudspeaker at reasonable volume levels. Conservatively-rated

specifications indicate high sensitivity, meaning that a massive power

amplifier is not required to drive Revel loudspeakers to reasonable volume

levels in large listening spaces.

Impedance 6.0 Ω (nominal)

3.6 Ω (minimum @ 90 Hz)

Indicates whether the loudspeaker presents a “difficult” or “easy” load on the

associated power amplifier. Combined with moderate phase angles, a

minimal impedance specification of 3.6 Ω allows a reasonably designed

power amplifier to drive Revel loudspeakers.

Filter Network Three-way, high-order acoustic response

@ 235Hz and 2 kHz

Indicates the acoustical characteristics of the filter network. Steep filters

indicate an optimized filter network that produces minimal acoustical

interference, low distortion, and expansive dynamic range.

Frequency Range - 3 dB from 60 Hz to 45 KHz Describes the low frequency and high frequency at which the loudspeaker

system amplitude response is 3 dB lower than the average level, when mea-

sured in a 4π anechoic chamber. While the -3 dB frequencies are the industry

standard for specifying frequency range, Low Frequency Extension is a more

useful specification for comparing the low-bass output capabilities of

loudspeakers.

In-Room Response Relative to

Target Response

±0.5 dB from 65 Hz to 18 kHz Indicates sound quality in context with other specifications. A breakthrough

measurement, this specification closely correlates to sound quality in a single

curve—a long-standing goal of loudspeaker engineers. In-room response is

measured through the use of large anechoic chambers. The loudspeaker’s

response is measured every 10 degrees, horizontally and vertically, for a total

of 72 response measurements. The in-room response curve is a prediction of

how the loudspeaker would measure in a typical room. Research and

observation reveals that ubiquitous on-axis response curves cannot

distinguish between two loudspeakers with radically different sound qualities.

Listening Window Response ±1.0 dB from 65 Hz to 20 kHz Indicates the on-axis response of the loudspeaker. An improved on-axis

measurement, this specification reduces the visual confusion of inaudible

interference. It retains full accuracy without using “spectral smoothing,”

which results in significant data loss.

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Revel Voice 2 Manuel d'utilisateur Page 25

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