OUR CHOICE OF FREQUENCY.

Constellation Phoenix

The choice to specify a low-frequency cutoff at 48 Hz for a dialogue channel in a Dolby 5.1 system, although seemingly oversized with respect to the canonical requirements of the human voice, represents a deliberate and technically sound design decision.

As correctly noted, the lowest fundamental of the male voice in the spoken register typically lies around 85 Hz, below which vocal information is generally not encoded in the center channels of a Dolby mix. However, it is essential to consider that the perception of vocal intelligibility does not depend solely on the fundamentals, but also — and in some cases primarily — on how the lower harmonics and transient components are handled by the playback system.

Technical Data

Low Frequency Load 

Vented NRS 

Configuration 

3-ways 

Drivers

1 tweeter 38mm T38Waveguide

1 woofer 130mm Paper Compound

Sensitivity 

90 dB SPL normalized to 1 m / 2.83 Vrms / decorrelated L/R

pink noise ITU-R BS 1116-1 I compliant listening room

Low Frequency

45 Hz @ -3dB referred to C4 WETS

Rated Impedance 

Modulus 4 Ω (min 3.9) Argument ± 36°

Acoustic Environment & Amplification

Listening Distance 

Optimum speaker-listener distance > 2 m

Listening Layout 

A carpeted floor in front of the speakers is recommended

Side and Back Walls 

Should be at least 1m away from the speaker front baffle

Suggested Amplifier

120W/4Ω 8minimum 3.9)

Argument +/- 36° 

Cabinet & Dimension

Cabinet

Solid walnut and HDF.

Size & Weight

210 x 530 x 390 mm (H x W x D) / 8 Kg