
ERSTMSERIES.
IN-WALL LOUDSPEAKERS.
With the revolutionary, patented Ceramic Metal 
Matrix Diaphragm (CMMDTM) technology of Infinity’s 
finest bookshelf and floorstanding loudspeakers 
and a simplified mounting system. Infinity’s ERS 
Series is a compelling choice for exceptional 
whole-house and surround sound home theater 
applications, and ideal for use with today's plasma, 
LCD and DLP television displays.
Infinity’s CMMD transducer cones deliver rich, 
resonance-free performance across their entire 
frequency range.The result is sonic accuracy 
without distortion that delivers all the excitement 
of your favorite music and film soundtracks.
With unobtrusive paintable grilles and baffles and 
a mounting system that ensures easy installation, 
the ERS Series is the in-wall solution that music 
and film enthusiasts have been waiting for.
Outstanding performance from speakers that don’t 
stand out in a room. ERS from Infinity.
THE LATEST EMBODIMENT 
OFAPOWERFUL HERITAGE.
CERAMIC METAL MATRIX DIAPHRAGMS.
Ceramic Metal Matrix Diaphragms reveal all the 
nuances of today’s music and film recordings by 
virtually eliminating unwanted resonances. 
The key is a ceramic compound called alumina. 
Three times as stiff as titanium – and 85 times 
stiffer than felted paper – alumina is deepanodized to an aluminum core to create a 
three-layer sandwich. CMMD adds bass impact 
to each ERS model, and delivers open, detailed 
and clean mid and high frequencies.
Magnified cross 
section of 
CMMD
alumina layers.
EASY TO INSTALL.
The ERS models feature 
mounting clamps that 
swing out to securely grip 
your wall from the inside. 
Because they need not be 
mounted to a stud, the ERS speakers can be 
placed for optimal sonic performance and 
installation ease.
ROUGH-IN FRAMES.
Optional rough-in frames are available for use 
in new-construction installations before drywall 
is installed.
SPECIFICATIONS: ERS 210  ERS HV250 ERS 110 ERS 110DT ERS 310
Frequency Range 47Hz – 22kHz (±3dB) 45Hz – 22kHz (±3dB) 47Hz – 22kHz (±3dB) 47Hz – 22kHz (±3dB) 45Hz – 22kHz (±3dB)
Recommended  10 – 125 watts 10 – 125 watts 10 – 125 watts 10 – 130 watts total 10 – 135 watts 
Amplifier Power Range (65 WPC)
Sensitivity 89dB 89dB 89db 88dB, both 89dB 
(2.83V @ 1 meter) channels driven
Nominal Impedance 8 ohms 8 ohms 8 ohms 8 ohms per input 8 ohms
Crossover Frequency 2,300Hz; 24dB/octave 2,600Hz; 12dB/octave 2,300Hz;24dB/octave 2,400Hz; 12dB/octave 2,300Hz; 12dB/octave
Low-Frequency 6-1/2" (165mm) CMMD 
Driver Dual voice coil
High-Frequency 3/4" (19mm) CMMD with  3/4" (19mm) with 3/4" (19mm) CMMD with  Dual 3/4" (19mm) with 1" (25mm) with 
Driver(s) acoustical waveguide acoustical waveguide acoustical waveguide acoustical waveguides acoustical waveguide 
External Dimensions  8-3/4" x 12-3/4" 15-3/8 x 7-1/2" 9-3/16" (Dia.) 9-3/16" (Dia.) 10-7/8" (Dia.) 
(W x H) (222mm x 324mm) (391mm x 191mm) (233mm) (233mm) (276mm)
Mounting Cutout Size  7-5/8" x 11-3/8" 14" x 6" 7-7/8" (Dia.) 7-7/8" (Dia.) 9-1/2" (Dia.) 
(W x H) (194mm x 289mm) (356mm x 152mm) (200mm) (200mm) (241mm)
Mounting Depth 3-1/4" (83mm) 3-7/8" (98mm) 3-1/2" (89mm) 3-1/2" (89mm) 4-1/4" (108mm)
Weight 3.5 lb (1.6kg) 5.7 lb (2.6kg) 3.1 lb (1.4kg) 4 lb (1.8kg) 5.6 lb (2.5kg)
Optional Preconstruction  ERS210RIF IW55 RIF IW6R RIF IW6R RIF IW8R RIF 
Rough-In Frame
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35Hz (–10dB) 38Hz (–10dB) 35Hz (–10dB) 35Hz (–10dB) 29Hz (–10dB)
TM
Dual 5" (130mm) 6-1/2" (165mm) CMMD
250 Crossways Park Drive,Woodbury, NY 11797 USA 516.674.4INF (4463) Fax 516.682.3523 www.infinitysystems.com 
Designed, edited and digitally produced by Harman Consumer Group Marketing & Design Center,Woodbury, NY.
Infinity is a registered trademark,and ERS and CMMD (patent nos. 6,327,372 and 6,404,897) are trademarks, 
of Harman International Industries, Incorporated.
Infinity continually strives to update and improve existing products, as well as create new ones. 
The specifications and construction details herein are therefore subject to change without notice.
© 2004 Harman International Industries,Incorporated Printed 12/04 Part No. ERSLIT12/04
II
TM
6-1/2" (165mm) 8" (200mm)