Meyer Sound Stella-8C User manual

Stella
™-8C : Ceiling Mount Installation Loudspeaker
PRELIMINARY PRODUCT INFORMATION Industrial Series
The Stella‑8C ceiling mount installation
loudspeaker is a self‑powered loudspeaker
engineered primarily for use in Meyer Sound’s
Constellation electroacoustic architecture.
Housed in an aluminum die cast enclosure
with a heatsink on the back, the Stella‑8C can
be flush‑mounted in ceilings and walls with
standard backboxes for 8‑inch drivers (with a
minimum depth of 6.5 inches).
The Stella‑8C delivers similar acoustical
performance as the Stella‑4 and Stella‑4C
loudspeakers, but with expanded output
capability and wider coverage. The unit's 8‑inch
coaxial cone and 0.75‑inch tweeter transducers
can produce a maximum peak SPL of 117 dB
at one meter over a wide frequency range
of 100 Hz to 22 kHz. The Stella‑8C contains
amplification and signal processing onboard
and exhibits the same low distortion, high
intelligibility, and flat frequency and phase
response for which Meyer Sound products are
known. As a self‑powered loudspeaker, the
Stella‑8C offers simplified installation for the
multichannel output of Constellation systems or
other installation applications.
Balanced audio and DC power are fed to the
Stella‑8C from a 5‑pin Phoenix connector on its
rear panel. Meyer Sound's patented Iso‑Input™
transformer‑isolated differential input circuit
yields a high common mode signal rejection
ratio (CMRR). Powering the unit from a unipolar
12 to 18 V DC external power source reduces
induced noise significantly, while the use of
a low voltage supply eliminates the need for
wiring conduits.
The required method for delivering balanced
audio and DC power to the Stella‑8C is with the
Stella‑188 external power supply. The single‑
space 19‑inch rack unit can accommodate up to
eight Stella‑8Cs (one per channel output). The
Stella‑188 receives eight channels of balanced
audio from its 25‑pin D‑sub connector and
routes the audio, along with 18 V of DC power,
to its 5‑pin Phoenix output connectors for
greater wiring convenience. Cable runs to the
Stella‑8C of up to 150 feet are possible with just
1 dB of loss in peak SPL using 18 AWG wire.
The use of composite multiconductor cables
(such as Belden®1502R) allows a single cable
to carry both audio and DC power from the
Stella‑188 to the Stella‑8C. The Stella‑8C
amplifier and signal processing circuits are
designed to tolerate voltage drops of up to
30 percent, thereby accommodating light‑gauge
cables and long cable runs. Internal energy
storage circuits minimize the system's peak‑
to‑average current demands, ensuring efficient
use of the Stella‑188's 18 V DC output.
Stella‑8C — 04.162.004.01 A
Copyright © 2007
Meyer Sound Laboratories Inc.
All rights reserved
meyer sound laboratories inc.
2832 San Pablo Avenue
Berkeley, CA 94702
T: +1 510 486.1166
F: +1 510 486.8356
[email protected]
www.meyersound.com
Ø13.23
[Ø336.02mm]
11.25
[285.75mm]
7.95
[202.06mm]
Ø0.22
[Ø5.50mm]
8.72
[221.49mm]
6.29
[159.83mm]
1.40
[35.56mm]
5.47
[138.86mm]
11.66
[296.16mm]
Operating Frequency Range 100 Hz – 22 kHz
Frequency Response, Free Field 115 Hz – 20 kHz ±4 dB
Maximum Peak SPL 117 dB (free field, measured with music and referred to 1 meter)
Phase Response 2 kHz – 18 kHz ±45°
Coverage 100°
Transducers One 8" coaxial cone driver, one 0.75" metal dome tweeter
Voltage Requirement 12–18 V DC
Audio/Power Connector Single 5‑pin Phoenix (3 pins for audio, 2 pins for DC power)
Input Impedance 20 kΩbalanced internal isolation (Iso‑Input) transformer
Nominal Input Sensitivity +6 dBV (2.0 V rms, 2.8 V peak) continuous average is typically
the onset of limiting for noise and music
Input Level Audio source must be capable of producing +15 dBV (5.6 V rms,
8.0 V peak) into 600 Ωto produce maximum peak SPL over the
operating bandwidth of the loudspeaker
Current Draw 3.1 A average; 6.3 A peak
Noise Floor <20 dB A weighted
Dimensions 11.66" (front) x 5.47" (depth without grille)
296.16 mm (front) x 138.86 mm (depth without grille)
Weight 9.0 lbs (4.1 kg) without backbox
Stella-188 external power supply required
Preliminary Specifications
Also available in black and custom colors
(backbox not included)