Meyer Sound Portable Speaker Stella 4 User Manual

PRELIMINARY PRODUCT INFORMATION  
Industrial Series  
Stella -4 : Installation Loudspeaker  
6.33  
[161mm]  
2.00  
5.39  
[51mm]  
[137mm]  
Also available in white and custom colors  
5.32  
[135mm]  
2.00  
[51mm]  
The Stella‑4 installation loudspeaker is a self‑  
powered loudspeaker engineered primarily for  
use in installations of Meyer Sound’s Constellation  
electroacoustic architecture. The Stella‑4 is housed  
in an aluminum die cast enclosure with a heatsink  
on the back, and is designed to be easily mounted  
on ceilings or walls with mounting accessories  
available from Meyer Sound and third‑party  
manufacturers.  
Balanced audio and DC power are fed to the  
Stella‑4 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.  
external power supply. The single‑space 19‑inch  
rack unit 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 con‑  
venience. Each of the eight channel outputs can  
deliver DC power to a single Stella‑4 loudspeaker  
at cable lengths of up to 300 feet with just 1 dB of  
loss in peak SPL, using 18 AWG wire, or to up to  
two Stella‑4 loudspeakers with limited cable runs  
of 150 feet (also with 18 AWG).  
Offering exceptional performance for a self‑  
powered loudspeaker of its size, the Stella‑4’s  
single 4‑inch cone transducer is capable of  
producing a maximum peak SPL of 108 dB at one  
meter over a wide frequency range of 100 Hz  
to 22 kHz. The Stella‑4 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‑4 offers  
simplified installation for the multichannel output  
of Constellation systems or other installation  
applications.  
The MMB‑Stella4 bracket enables mounting the  
Stella‑4 onto a wall, ceiling, or single‑gang  
electrical back box. The bracket can also be used  
with third‑party mounting options, such as those  
available from OmniMount®. Like the MMB‑Stella4  
bracket, the MAMB‑Stella4 adjustable bracket  
enables mounting the Stella‑4 onto a wall, ceiling,  
or single‑gang electrical back box; however,  
the MAMB‑Stella4 bracket allows the Stella‑4's  
position to be adjusted by up to 45 degrees in  
any direction.  
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‑4 loudspeakers. The Stella‑4's amplifier  
and signal processing circuits are designed to  
tolerate supply 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 required method for delivering balanced audio  
and DC power to the Stella‑4 is with the Stella‑188  
Preliminary Specifications  
Made by Meyer Sound Laboratories  
Berkeley, California USA  
European Office:  
Meyer Sound Lab. GmbH  
Carl Zeiss Strasse 13  
56751 Polch, Germany  
Operating Frequency Range  
Frequency Response, Free Field  
100 Hz – 22 kHz  
115 Hz – 20 kHz ±4 dB  
C
US  
Maximum Peak SPL  
Phase Response  
108 dB (free field, measured with music and referred to 1 meter)  
250 Hz – 18 kHz ±30  
°
Coverage  
Transducer  
Voltage Requirement  
Audio/Power Connector  
Input Impedance  
60 (3 kHz – 13 kHz ±10 ); 120 (below 2 kHz)  
°
°
°
One 4" cone driver  
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  
Stella‑4 — 04.161.004.02 C  
Copyright © 2007  
Meyer Sound Laboratories Inc.  
All rights reserved  
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  
1.5 A average; 3.3 A peak  
<20 dB A weighted  
5.39" (front OD) x 6.33" (max OD) x 5.32" D  
137 mm (front OD) x 161 mm (max OD) x 135 mm D  
5.0 lbs (2.27 kg)  
meyer sound laboratories inc.  
2832 San Pablo Avenue  
Berkeley, CA 94702  
Current Draw  
Noise Floor  
Dimensions  
T: +1 510 486.1166  
F: +1 510 486.8356  
Weight  
Stella-188 external power supply required  
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