Stella
™
-4 :
Installation Loudspeaker
PRELIMINARY PRODUCT INFORMATION
Industrial Series
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.
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.
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.
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 required method for delivering balanced audio
and DC power to the Stella‑4 is with the Stella‑188
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).
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.
Operating Frequency Range
100 Hz – 22 kHz
Frequency Response, Free Field
115 Hz – 20 kHz ±4 dB
Maximum Peak SPL
108 dB (free field, measured with music and referred to 1 meter)
Phase Response
250 Hz – 18 kHz ±30
°
Coverage
60
°
(3 kHz – 13 kHz ±10
°
); 120
°
(below 2 kHz)
Transducer
One 4" cone driver
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 k
Ω
balanced 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 pro15 dBV (5.6 V rms,
8.0 V peak) into 600
Ω
to produce maximum peak SPL over the
operating bandwidth of the loudspeaker
Current Draw
1.5 A average; 3.3 A peak
Noise Floor
<20 dB A weighted
Dimensions
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
Weight
5.0 lbs (2.27 kg)
Stella-188 external power supply required
Preliminary Specifications
6.33
[161mm]
5.32
[135mm]
2.00
[51mm]
2.00
[51mm]
5.39
[137mm]
Also available in white and custom colors
Stella‑4 — 04.161.004.02 C
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
www.meyersound.com
European Office:
Meyer Sound Lab. GmbH
Carl Zeiss Strasse 13
56751 Polch, Germany
Made by Meyer Sound Laboratories
Berkeley, California USA
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