Meyer Sound Portable Speaker Stella 8c User Manual

PRELIMINARY PRODUCT INFORMATION  
Industrial Series  
Stella-8C : Ceiling Mount Installation Loudspeaker  
1.40  
[35.56mm]  
8.72  
[221.49mm]  
7.95  
[202.06mm]  
11.25  
[285.75mm]  
Ø0.22  
[Ø5.50mm]  
6.29  
[159.83mm]  
5.47  
[138.86mm]  
Ø13.23  
[Ø336.02mm]  
Also available in black and custom colors  
(backbox not included)  
11.66  
[296.16mm]  
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).  
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.  
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.  
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 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.  
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  
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  
Preliminary Specifications  
Stella‑8C — 04.162.004.01 A  
Copyright © 2007  
Meyer Sound Laboratories Inc.  
All rights reserved  
Operating Frequency Range  
Frequency Response, Free Field  
Maximum Peak SPL  
Phase Response  
100 Hz – 22 kHz  
115 Hz – 20 kHz ±4 dB  
117 dB (free field, measured with music and referred to 1 meter)  
2 kHz – 18 kHz ±45  
°
Coverage  
Transducers  
Voltage Requirement  
Audio/Power Connector  
Input Impedance  
100  
°
One 8" coaxial cone driver, one 0.75" metal dome tweeter  
12–18 V DC  
Single 5‑pin Phoenix (3 pins for audio, 2 pins for DC power)  
20 kΩ balanced internal isolation (Iso‑Input) transformer  
+6 dBV (2.0 V rms, 2.8 V peak) continuous average is typically  
the onset of limiting for noise and music  
Nominal Input Sensitivity  
Input Level  
Audio source must be capable of producing +15 dBV (5.6 V rms,  
8.0 V peak) into 600 Ω to produce maximum peak SPL over the  
operating bandwidth of the loudspeaker  
meyer sound laboratories inc.  
2832 San Pablo Avenue  
Berkeley, CA 94702  
Current Draw  
Noise Floor  
Dimensions  
3.1 A average; 6.3 A peak  
<20 dB A weighted  
11.66" (front) x 5.47" (depth without grille)  
296.16 mm (front) x 138.86 mm (depth without grille)  
9.0 lbs (4.1 kg) without backbox  
T: +1 510 486.1166  
F: +1 510 486.8356  
Weight  
Stella-188 external power supply required  
 

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