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Infinity ERS-310II 5.1 #1 Home Theater System-Premier Acoustic PA-120 Sub

Model #: ERS 310II / PC251 / PA-120


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You Receive

4 Each Infinity ERS 310II 2-Way Round In-Ceiling Speaker
1 Each Infinity Primus PC251 Center Speaker
1 Each Premier Acoustic PA-120 Subwoofer

Infinity ERS-310II In Ceiling Speakers

● CMMD Diaphragm Technology
● High-Efficient 135W Driver
● Flush-Mount Design
● Versatile Placement
● Paintable

With high-end features and exceptional sound reproduction, the Infinity ERS 310 2-Way Round In-Ceiling Speaker will take your audio listening experience to a whole new level. This stylish series was designed for both professional and entertainment enthusiasts with the capability to deliver a full, clear, and tight sound response for applications where space is limited. The high and low-frequency drivers are manufactured with Infinity's Ceramic Metal Matrix Diaphragm (CMMD) technology. This adds unsurpassed rigidity and strength to the powerful 8" woofer and 1" dome tweeter.

In addition, this speaker offers great features such as high-frequency acoustical waveguide technology, space-saving flush-mount design, 135W of peak power, and a full range of audio frequencies to complement a variety of your audio selections. The Infinity ERS 310 is an ideal solution for home theater, whole house audio systems, and anywhere high-quality, in-ceiling sound projection is required.

Ceramic Metal Matrix Diaphragm (CMMD)
The low-frequency and high-frequency drivers incorporate Infinity's CMMD technology. CMMD is constructed of a ceramic compound (alumina), which is 3 times as rigid as titanium, and 85 times more rigid than felted paper. This unique design is capable of eliminating unwanted tonal resonances in the signal path. The end result is a full, clear, tight reproduction of low and high frequencies.

CMMD Tweeter Design
It has the ability direct the high frequencies toward your listening position by incorporating a unique 1" CMMD dome tweeter. For optimal performance, the loudspeakers should be placed an equal distance from your listening position and separated so that the angle between them, at the listening position, is between 40 and 60 degrees.

Flexibility and Placement
With its space-saving design of only 4-1/4" mounting depth, this speaker offers you maximum flexibility of being able to install it anywhere.

Frequency Response
With a frequency response of 45 Hz - 22 KHz, this speaker reproduces a full sound range from deep bass tones to ultra-high frequencies.

Ease of Installation
Locate your speaker location, cut the drywall, connect the speaker wires and mount the loudspeaker; it's that simple. This speaker includes a cutting template and integrated dog-ear brackets for retrofit applications; or use an optional rough-in frame for new construction.

Paintable Frame and Grille
Both the frame and grille can be painted to blend into the existing environment.


Speaker Design:In-Ceiling
Power Rating:10 - 135W
Impedance:8 ohm
Frequency Response:47 Hz - 22 KHz (±3 dB)
Sensitivity:89 dB @ 2.83V/1M (both channels driven)
Crossover Frequency:2300 Hz; 12dB/octave
Enclosure:Not Specified by Manufacturer


Tweeter:1.0" (25mm) CMMD Dome
Woofer:8.0" (200mm) CMMD Cone


Connector Type:Spring Clip
Construction:Not Specified by Manufacturer
Dimensions:10.8" (276mm) Diameter
Cut-Out Size:9.5" (241mm) Diameter
Mounting Depth:4.25" (108mm)
Weight:5.6 lbs (2.5 kg)
Color:Matte White/Paintable

Infinity Primus PC251 Center Speaker

The Infinity Primus® Series – Where Infinity sound begins.
Prepare to raise your expectations. Experience home entertainment at a new level of clarity and realism. From unobtrusive bookshelf systems to dazzlingly powerful home theaters, there’s an Infinity Primus® system that’s right for every purpose and room in your home. Most other speaker systems in the Primus price range sound as if they are spraying their sound at you – tinny, hollow and reproduced – a copy of a copy. With its MMD® transducer technology and seamless component architecture working in unison to eliminate unwanted resonance modes, the Infinity Primus PC251BK doesn’t spray – it immerses, rolling over the listener with warm, rich sound – the way live music does. Combine the Primus PC251BK with any one of our powerful MMD-equipped floorstanding loudspeakers, subwoofers, and bookshelf speakers, and the Primus PC251BK will fill any room with dramatic and well-defined sound. This is where Infinity sound begins, and it’s well within your reach.


● Two-way center-channel loudspeaker
● Dual 5-1/4" (133mm) MMD® low-frequency drivers
● 3/4" (19mm) MMD hi-frequency driver
● Five-way binding posts
● Legendary Infinity® engineering - speaker components seamlessly work together as an integrated system
● Extremely low resonance enclosures - hear music exactly as it was recorded
● Tweeter waveguides improve on-and-off-axis high-frequency response
● Precision crossover networks
● Patented MMD transducers significantly improve cone performance, providing ideal rigidity and resistance to precision sound across the entire spectrum

The Infinity Primus® PC251BK - A solid center.
A well-designed center-channel speaker ensures a listener can clearly hear song lyrics or dialogue above the bombast and bassy low frequencies. Boasting a high crossover frequency of 2,800Hz and a low crossover of 650Hz, the Primus PC251BK reduces strain on the respective speaker drivers, allowing them to independently focus on their respective ranges. The audio signal from the receiver is split among three different loudspeakers - low and midrange frequencies are sent to dual 5.25-inch Metal Matrix Diaphragm™ (MMD) woofers, and a 3/4" (19mm) MMD® driver handles the high frequencies, allowing dialogue, foley tracks and high frequencies to sparkle above the other channels' signals without interruption or interference.

Incredible sound. Incredible price.
With the Infinity Primus® PC251BK's Metal Matrix Diaphragm™ technology and low resonance enclosures, it possesses excellent transient frequency response -agile and sharp - perfectly reproducing sophisticated percussion and piano modalities. You will hear music just the way it was recorded, without the speaker changing or altering the sound - precisely as it should be. Combined with its superb linear frequency response, the Primus PC251BK sparkles in the high frequencies to reproduce acoustic instruments and vocal tracks with robust midrange power to wash you in sound.

Primus. Where home theater begins.
With their excellent midrange clarity and three-way capabilities, the Infinity Primus® PC251BK is the perfect home theater companion. Dialogue and foley tracks are articulated exceptionally well and seem to hang in the air - even amidst the most cacophonic battle or chase scene (or Hans Zimmer score). The Primus PC251BK brings long-term, plug-and-play, trouble-free enjoyment to your home theater, unheard of at this price point - and it is the perfect complement to any 5.1- or 7.1-channel home theater system.

Patented MMD® transducer technology.
Derived from our patented CMMD® technology, the Metal Matrix Diaphragm™ (MMD) approach continues the Infinity tradition of using advanced materials to improve sonic accuracy. These diaphragms are much stiffer than standard metal ones - by anodizing both sides of an aluminum core, we're able to significantly improve cone performance and outperform cones made of paper, polypropylene or Kevlar® material. By virtue of its extreme rigidity and resistance to resonance, MMD® material is far more than just another diaphragm substance. It is an ideal diaphragm material for the ultimate listening experience. Sound propagates at a higher velocity in metals than in materials such as polymers and papers. Sound will travel through MMD material nearly twice as fast as it will through any other cone material - thus, moving unwanted resonances outside the audible range.

Superior Infinity® engineering.
The Infinity Primus® PC251BK's speaker drivers, baffles, cabinets and waveguides are designed to work seamlessly together as an integrated system - fitting together like pieces of a jigsaw puzzle. It begins with our ultra-precise transducers - the beating heart of the Primus PC251BK. MMD® technology doesn't change, color or distort audio signal sound the way diaphragms made of other materials do. This combines with the Primus speaker's low resonance enclosures to compound the precision qualities of the transducer, further eliminating mechanical distortion.

Infinity - Legendary reputation. Uncompromising craftsmanship and sound.
With the Infinity Primus® PC251BK, you not only experience the cutting edge in high-performance transducer technology and sound reproduction, you experience the cutting edge from the makers of Infinity products - some of the world's most innovative, high-quality audio equipment. The road to the Infinity Primus Series is a road lined with dozens of audio milestones: The Infinity Servo Statik 1a - the world's first powered subwoofer. The EMIT® (Electromagnetic Induction Tweeter) device. The revolutionary IRS speaker - the world's first "reference""loudspeaker. The Prelude MTS® speaker - the world's first powered tower speaker. Since 1968, innovative Infinity technologies, materials and manufacturing techniques have advanced the science of sound, and have set new standards in loudspeaker technology and performance. Infinity Primus Series speakers benefit from every Infinity innovation that has come before. This is where Infinity sound begins, and it's well within your reach.

General Specifications

Frequency Response (±3dB):80Hz - 20kHz
Recommended Power Amplifier Range:10 - 150 watts
Sensitivity (2.83V @ 1m):90dB
Nominal Impedance:8 ohms
Crossover Frequency(ies):3,000Hz; 24dB/octave
Low-Frequency Driver:Dual 5-1/4" (130mm) MMD®
High-Frequency Driver:3/4" (19mm) MMD®
Dimensions (H x W x D):7-5/8" x 18" x 9-5/8" (187mm x 457mm x 245mm)
Weight:17.6 lb (8kg)
Finish:Black Wood-Grain Enclosure

Premier Acoustic PA-120W Powered Subwoofer

Powered Subwoofers are designed to bring out the low end bass response found in DVD movies or music. Huge explosions, dinosaurs walking or just bass guitar and drums, the PA-120W is designed to reproduce these sounds perfectly. The alignment of a large 12" polygraphite woofer, and a built in 650 watt amp makes this sub fill any room with powerful clear bass. We have given you even more control over the way you tune your subwoofer. An adjustable crossover to custom set the frequency response, a volume control to set the output and an auto on/off switch to power on the PA- 120W as soon as that bass hits your sound track. All these features make the PA-12W one of the strongest powered subwoofers on the market today.


12" Active Subwoofer
Sensitivity:85DB 1 Watt 1 Meter
Ohms:8 Ohms
Frequency Responses:24HZ-20KHZ span>
Wattage:200- 650 Watts
Size:19" x 14" x 19" (H X W X D )
Weight:56 pounds each
Warranty:5 year Warranty

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