Infinity Primus PC351

Center channel speaker

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Item# 108PC351BK

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Overview
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Customer Reviews
Category Info
Accessories

Your home theater's most important speaker

The center channel speaker is the workhorse in a home theater system. It has to reproduce clear dialogue and special effects that keep your eyes and ears glued to the movie action. A high-quality center speaker is a great investment for any surround sound setup. Try to choose one that's as closely matched as possible to your front right and left speakers, so that as sound moves across the front stage, it stays seamlessly realistic.

Our take on the Infinity Primus PC351

by Kristen Schaub

Your ears will thank you when you add Infinity's Primus PC351 center channel to your home theater system. It uses five separate drivers to produce the kind of clear, accurate dialogue and special effects that make movies and TV shows come to life. It's all thanks to a combination of Metal Matrix Diaphragm® driver technology and a low-resonance enclosure, which help this speaker produce sparkling high frequencies and detailed midrange at any volume level.

Infinity's exclusive Metal Matrix Diaphragm drivers
The Primus PC351 features Infinity's exclusive Metal Matrix Diaphragm ("MMD" for short) driver technology in the 3/4" tweeter, both 3" midranges, and both the 5-1/4" woofers. These MMD drivers consist of a stiff aluminum core, anodized on both sides for increased strength and rigidity. The result is extremely fast, extremely accurate response — you'll hear distinctly cleaner, more realistic sound, even at higher volume levels.

Build your own Primus® system
The Infinity Primus PC351 will fill just about any room with dramatic and well-defined sound. Pair it with Infinity's P363 floor-standing speaker or P163 bookshelf speaker to create a stunning Primus home theater system. And don't forget to add the perfectly matched PS38 powered subwoofer to get deep, accurate bass in the mix.

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Highlights:

frequency response 80-20,000 Hz (±3dB)
handles up to 150 watts
sensitivity 91 dB
8-ohm impedance
Metal Matrix Diaphragm® drivers minimize distortion
3/4" MMD dome tweeter
dual 3" MMD midranges
dual 5-1/4" MMD woofers
magnetically shielded for safe placement next to older tube TVs
acoustic suspension (sealed) design
black woodgrain vinyl finish
5-way binding posts
23-3/4"W x 7-3/8"H x 9-11/16"D
weight: 25 lbs.
warranty: 5 years
Our 60-day money-back guarantee

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Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and specs chart | What’s in the box? | In-depth notes

Features and Specs


Enclosure Loading...	Acoustic Suspension
Tweeter Loading...	Dome
Midrange size (inches) Loading...	3
Woofer size (inches) Loading...	5-1/4
Connector Type Loading...	5-way post
Power Range Loading...	10-150
Sensitivity Loading...	91 dB
Impedance (Ohms) Loading...	8
Frequency Response Loading...	80-20k Hz
Height (inches) Loading...	7-3/8
Width (inches) Loading...	23-3/4
Depth (inches) Loading...	9-11/16
Weight Loading...	25 lbs
Parts Warranty Loading...	5 Years
Labor Warranty Loading...	5 Years

Product Research

What's in the box?

Download owner's manual

Black center channel speaker
Black grille (removable)
4 Self-adhesive rubber feet
Owner's Guide
Warranty sheet

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Driver Technology
Enclosure Design
Connections

Driver Technology

Metal Matrix Diaphragm (M.M.D.): Derived from the C.M.M.D. material used in Infinity's flagship Cascade series, M.M.D. features a stiff aluminum core, anodized on both sides for increased strength and rigidity. M.M.D. transducers conduct sound faster than paper, polypropylene, and Kevlar, pushing unwanted resonances beyond the operating range of the transducer. M.M.D. drivers deliver crystal-clear, distortion-free sound from dynamic digital sources, even at high listening levels.

5-1/4" Woofers: The dual 5-1/4" M.M.D. cone woofers offer extremely accurate lower midrange response for cleaner, more realistic sound. For a smoother response and improved durability, the woofers use rubber surrounds.

3" Midranges: The PC351 has dual 3" M.M.D. cone midranges for full, accurate upper midrange sounds. The mids also use rubber surrounds.

3/4" Tweeter: The speaker has a 3/4" M.M.D. dome tweeter that offers superior stiffness and damping compared to traditional metal domes.

Acoustical Waveguide: The PC351's tweeter utilizes an acoustical waveguide to deliver, more even high frequency response, no matter what part of the room you're in.

Precision Crossover Network: The speaker features a 3-way crossover system with crossover frequencies at 650Hz and 2800Hz. The crossover has a 24dB/octave slope.

Matching System: The PC351 is voice-matched to all the speakers in the Primus line, so a complete matching system can be built.

Enclosure Design

Wood Grain Vinyl Cabinet: The Infinity PC351 features a black wood grain vinyl cabinet that matches almost any decor.

Acoustic Suspension Design: The Infinity center channel utilizes an acoustic suspension (sealed) enclosure for tight, accurate midbass performance.

Low Resonance Enclosure: The PC351 employs a extremely low resonance enclosure, so you hear the music exactly as it was recorded.

Grille: The speaker comes with a removable black cloth grille with a rigid plastic frame.

Connections

5-Way Binding Posts: The 5-way binding posts will accept bare wire, pin connectors, spade connectors, banana plugs, and dual banana plugs.

Color-Coded: The speaker's binding posts are color-coded (red/black) for easy identification between positive and negative.

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Reviews for the Infinity Primus PC351

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5 out of 5

Center speaker

Written By Andres, Falcon Heights, TX on Monday, April 29, 2013

Crutchfield Customer Review (What's this?)

Excellent quality sound, including at max volume, which is actually very loud!

Pros:

I think this speaker could make a home theater on its own!

1 out of 1 people found this helpful

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4 out of 5

Very good.

Written By Dan, Antigo, WI on Wednesday, April 24, 2013

Crutchfield Customer Review (What's this?)

Very pleased with the power and clearity of sound. Really brings the dialogue to the forefront, even amongst loud sound effects. Don't look at the absence of a 5 star rating as a detractor, as I only give those ratings to products that are arguably the best of their type. This is a tremendous value for the money.

1 out of 1 people found this helpful

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5 out of 5

Infinity PC351BK Center channel speaker

Written By Thundergod, San Diego, CA on Tuesday, April 16, 2013

Crutchfield Customer Review (What's this?)

The PC351BK was purchased to replace a Dayton CCS-33 3-way Center Speaker. Wow! What an incredible difference in clarity, presence, and overall tonal quality. Now, I hear what prior reviewers stated about this speaker. My system is based on an Onkyo 7.1 with a mixed speaker setup; Sony front floor-standing, Dayton mini-surrounds, Infinity center, and Polk sub. Using various audio modes; Stereo, Neo 6, PLII, THX, I can color music and movies to bring realism to my soundstage. With the PC351BK, watching a movie, I can clearly hear dialog, all while bullets streak across the room, shell casing bouncing off concrete floor, an horrific explosions rumbling in the background. The PC351BK is an amazing speaker. Sure it is big and a bit heavy, but it does an excellent job. My wife use to complain about not hearing the actors voices clearly without having the volume turned up loud. Now, with the PC351BK, even the softest voices come through at a nice clear level. In the future, I plan to acquire the matching Infinity speakers. My thinking is if the Infinity PC351BK sounds this good with a mixed bag of speakers, then it must sound incredible with matched Infinity speakers all around. I highly recommend the Infinity PC351BK center speaker for any home theater system.

Pros:

The PC351BK's black cabinet/grille blended perfectly with my black-shelved glass console and all black components.

Cons:

The speaker wire attachment posts and position aren't in the best position. I had to use spade lugs, rather than push-in plugs.

1 out of 1 people found this helpful

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5 out of 5

Great center speaker.

Written By LarryB, Georgetown on Tuesday, April 02, 2013

Crutchfield Customer Review (What's this?)

I just love this center speaker.

Pros:

Great sound at a low low price.

Cons:

It's big.

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5 out of 5

I wish i did it sooner

Written By Chris, Chicago, IL on Friday, March 29, 2013

Crutchfield Customer Review (What's this?)

i don't have much too compare to but i can honestly say it sounds awesome with a Onkyo 135watts/ channel home theater with a Polk RTi12 fronts. I was afraid i wasn't spending enough money but the sound is incredible. i counld't or wasn't willing to spend over a grand on Klipsch RC64s, but i thought i had to-NOT SO MUCH. this center is doing the work and it only cost a fraction. i was running an older Boston center and now i know what i was missing, almost everything in all the movies i watched. don't make the same mistake and just buy it.

Pros:

price and quality, sound

Cons:

size, either too small or too large depending on placement

2 out of 2 people found this helpful

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5 out of 5

Great Product

Written By Preston, Woodland, Washington on Wednesday, March 27, 2013

Crutchfield Customer Review (What's this?)

This is an incredible speaker the clarity of the voice in this is wonderful.

Pros:

Everything. Just high quality technology.

Cons:

None!

1 out of 1 people found this helpful

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5 out of 5

Excellent sound & value

Written By Anonymous, East Coast on Thursday, March 14, 2013

Crutchfield Customer Review (What's this?)

I wish I had gotten this unit sooner. It looks good, sounds great, and appears to be very well made. It's larger than most center-speakers I've seen, and it needs a little extra space.

Pros:

Excellent sound & value.

Cons:

None that I can see.

1 out of 1 people found this helpful

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5 out of 5

Infinity Primus PC351

Written By BabyLo Production, Tx on Tuesday, March 12, 2013

Crutchfield Customer Review (What's this?)

Infinity has the best speakers

Pros:

awesome soung quality

Cons:

none

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5 out of 5

Infinity Primus PC351

Written By DanK, Buckeye, AZ on Monday, January 21, 2013

Crutchfield Customer Review (What's this?)

Excellent center channel characteristics. Sounds great, very happy with purchase

Pros:

none

Cons:

Large dimensions, if it fits you like the sound.

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5 out of 5

Very pleased with this purchase

Written By Mimo, West Caost on Monday, January 14, 2013

Crutchfield Customer Review (What's this?)

Very please with this speaker. It replaced my center speaker that came with Onkyo home theather package. I manilny bought this to improve clarity of dialogues when watching movies or TV and it is superb compared to the original Onkyo speaker. No need to turn to subtitles anymore ;-) Also, overall sound is so much richer and deeper with this center speaker. I will probably replace my front speakers with ones matching Infinity PC 351 better than the stock Onkyo ones. It is quite big, but i have room for it as will have those who wall mount their TVs and keep speakers on the console below it. Also very happy with service and pricing provided by Crutchfield.

Pros:

sound quality, built quality, looks

Cons:

was more than $100

1 out of 2 people found this helpful

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5 out of 5

Nice Center speaker!

Written By Chuck D, Syracuse NY on Monday, January 14, 2013

Crutchfield Customer Review (What's this?)

One of the best center speakers I have personally heard... not much less HIFI sound than the B&W I just heard at Mangloia Best buy for $600 !!

Pros:

larger must have room on your tv stand console... movies are awesome with this speaker!!

1 out of 1 people found this helpful

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5 out of 5

Very Pleased with purchase

Written By Bob F, Huntington Beach, CA on Saturday, December 22, 2012

Crutchfield Customer Review (What's this?)

I ordered during the holiday shopping season and was surprised at how quickly I received the product. I did not utilize any special shipping and received the shipment with in three or four days. The sound from the speaker is wonderful. I use the center speaker in conjunction with two forward and two rear infinity speakers. The room is 20X20 and is filled with rich tones with this setup.

Pros:

Sound quality and service.

Cons:

the speaker is a bit taller than expected but this is more a personal issue than a manufacturing or quality issue. I should have paid attention to the specs and not the percetion of the picture.

2 out of 2 people found this helpful

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5 out of 5

Infinity Center Channel Speaker

Written By MCB, Pinckney, MI on Saturday, November 17, 2012

Crutchfield Customer Review (What's this?)

I chose this speaker because it is an acoustic suspension design and that it was an Infinity. One of the key things in chosing a center speaker is its compatibility with your existing speakers. I believe that this speaker does this for me. I like to think that I have Infinity's golden age speakers (1980s). My front speakers are RSIIIb (acoustic suspension.) Infinity is a different company now so the brand name isn't the key. First I have to say that any (that I know of) center speaker does not and need not out perform the front speakers. In my case the PC351 can not match my RSIIIb's. The very lows and the very highs are not there. BUT, the PC351 does remarkably blend together well with my main speakers. I did two different types of testing, playing a good wide range jazz CD and test tones (from my Dolby decoder, white like noise). I was very impressed. I never expected such good blending between the speakers. Listening to the test tone smoothly phase interfering between the PC351 and my main speaker, blew me away. (Test: move your listening position (while close) between the speakers and hearing audio wave sound pattern changes when the tone is sent to both speakers)

Pros:

Great speaker. Very nice with movies and audio recordings. Maybe compatable with more than acoustic suspension speakers. Perhaps Infinity has gotten back some of their old magic.

Cons:

I haven't figured that out yet. Maybe that it is not made in the USA.

3 out of 5 people found this helpful

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5 out of 5

A great addition to my audio system

Written By johnm, San Diego, CA on Sunday, November 11, 2012

Crutchfield Customer Review (What's this?)

I'm currently using Bose 301 speakers for the front of the room and Bose 201s for the rear. I had a Polk Audio CS10 for my center speaker but wanted to upgrade. After reading the reviews, choosing the Infinity Primus PC351 was an easy choice, and a good one, too. The sound is bright and clear and exactly what I was looking for.

Pros:

Great sound, beefy construction.

Cons:

None

2 out of 2 people found this helpful

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5 out of 5

Nice!

Written By BT, AZ on Thursday, November 08, 2012

Crutchfield Customer Review (What's this?)

This speaker sound great. Perfect for a surround sound system.

Pros:

Sounds great.

Cons:

None

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5 out of 5

Great Value

Written By Joshua J, Minneapolis, MN on Friday, September 28, 2012

Crutchfield Customer Review (What's this?)

Growing up listening to movies and music through my JBL Soundgear 3030, I have always held Harmon International products in high regard. When it came time for me to finally assemble my own home theater system, I was expecting no less from these Infinity speakers. I've created a system of 4 P363's towers, 2 P163's bookshelfs, a C351 center, and a PS312 sub, all powered by a Harmon/Kardon AVR3650. Being a bargain hunter, I waited for these to go on "sale" to obtain the best price (well this side Black Friday sales prices).

I have had the speakers hooked up for about two months now, and all I can say is WOW! The sound reproduction and tonal quality is incredible. Everyone has their own opinions on what sounds good, but ultimately the quality of the sound comes down to the quality of the receiver and the quality of the speaker components. I've utilized various mediums ranging from music, movies and video games, and in each medium, even with works I know quite well, comes alive- whether connected via HDMI, fiber optic or composite. There are qualities to the sound that I did not know existed- that is how incredibly clear the sound is. I would definitely recommend these speakers to someone looking to obtain the best sound for the price, while still having a high quality product.

3 out of 3 people found this helpful

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5 out of 5

Infinity Primus PC351

Written By mak1313, Ohio on Wednesday, August 29, 2012

Crutchfield Customer Review (What's this?)

Superb sound and quality! I have this and a set of P163's and a set of P363's along with a Klipsch sub 12 and the sound is beyond belief!

2 out of 3 people found this helpful

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5 out of 5

Terrific Home Theater Center Console Speaker

Written By The Hawk, Longwood, FL on Thursday, August 16, 2012

Crutchfield Customer Review (What's this?)

The addition of the Infinity Primus PC351 five individual speakers in the center speaker position in your home theater set-up is outstanding. Before this addition, I was using an Onkyo center speaker with only three speakers. What a difference the sound reproduction of five versus three speakers makes in filling a room. It also provides more adjustable soiund options through your receiver allowing you to spead the bass around better. For the price, this Infinity Primus PC351 is by far the best center speaker that I have ever used. You cannot go wrong with selecting the PC351.

Pros:

Five speakers; total adjustability; excellent sound reproduction; excellent price.

Cons:

Weight! It was quite a bit more that other center speakers on the market (25+ pounds). Just make sure your shelp can support it without fatiguing.

3 out of 3 people found this helpful

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5 out of 5

My 1st center

Written By PK, Burleson Tx on Tuesday, July 03, 2012

Crutchfield Customer Review (What's this?)

Well, This is my 1st center speaker and its a little bigger than i expected but i didnt just want the minimum either. So i went all the way and i love it despite the size. Instead of placing it on top of my cabinet in front of the tv i placed it under the tv inside the cabinet... worked out perfectly. as far as sound goes it just fills things out so much more with both dialogue and background noises such as birds singing and just normal background noises of life. anyway it sounds great, I highly recommend it.

Pros:

Great sound, matches my floors and sub. looks nice.

Cons:

Bigger than i thought, but just rethought my location.. worked out great.

5 out of 5 people found this helpful

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5 out of 5

A Beast - Love it.

Written By BKautz, Oswego, IL on Tuesday, February 21, 2012

Crutchfield Customer Review (What's this?)

I've owned Infinity speakers for years. I re-purposed my old Reference Series towers for my new home theater set up without reservation. I just needed a center channel that could not only match the front right and left, but keep up. This speaker does that and more. It's as accurate as the RS towers, and nearly as powerful for a well balanced and pure sound. Couldn't beat the price for a great center. I have installed Infinity in-walls to complete my 9.2 surround set up. I've waited a long time for this set up, and couldn't be happier.

Pros:

Accurate, Powerful, Voice-matched to both new and old Infinity loudspeakers.

Cons:

Not necessarily a "con", but it's definitely a beast. To heavy to hang with one of the more wimpy wall brackets, so it needs a stable surface.

1 out of 1 people found this helpful

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1-20 of 25 >>

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You'll need wire to connect your center channel speaker to your amp or receiver.Cut your speaker wire to the exact length you need with a spool of bulk speaker wire. No wire is included with this speaker. See all categories & accessories

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AudioQuest X2 Speaker Cable 14-gauge cable, connectors optional (30 feet, Gray)

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AudioQuest G2 Speaker Cable 16-gauge cable, connectors optional (30 feet, Gray)

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Monster XPHP™ MKII Speaker cable with clear jacket (100 feet)

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Arista 16-Gauge Speaker Cable (50-feet)

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Monster Cable Dual Banana Speaker Connectors 1 pair

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Monster QuickLock™ Self-Crimping Angled Spade Connectors 2 pairs

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Monster Twist-on Mini Banana Connectors 2 pair, 16-gauge

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Monster Twist-on Banana Connectors 2 pair, 12-gauge

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Monster Cable Twist-on Angled Gold Pins 4 pair, 12-gauge

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Monster XP Mini Twist-on Pin Connectors 4 pair, 16-gauge (4 pair)

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Original Monster Cable With gold pin connectors (15-foot pair)

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Monster Cable SuperFlat™ Mini Decor-friendly speaker cable with gold pin connectors (50-foot spool)

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AudioQuest Type 4 Single center speaker cable with pre-attached banana connectors (10 feet)

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Center Stage Bracket CSB-1210-BLK Large speaker shelf for flat-panel TVs

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Sanus NFC18 Single 18" center channel speaker stand (Black)

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Pinpoint AM15 Center channel speaker wall mount

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Deluxe Audio + Video Component Installation

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Rated 5-stars by consumers

For a more in-depth review and enhanced detailed information on the Infinity Primus PC351, please visit the Crutchfield website product page (/S-R7N2TNDBlaP/p_108PC351BK/Infinity-Primus-PC351.html ).

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Infinity Primus PC351

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Compare with other Infinity models

Infinity Primus PC351
Hear more robust special effects
5 out of 5: IN STOCK
The Infinity Primus PC351
- adds two 3" MMD midranges for more precise and robust dialogue and special effects
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Infinity Primus PC251
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5 out of 5: IN STOCK
- The Infinity Primus PC251 offers:
  - frequency response 80-20,000 Hz
  - 3/4" dome tweeter and dual 5-1/4" woofers
  - Metal Matrix Diaphragm® drivers minimize distortion
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Infinity Primus PC351
center channel speaker (each)
5 out of 5: IN STOCK
- The Infinity Primus PC351 offers:
  - frequency response 80-20,000 Hz
  - 3/4" dome tweeter, dual 3" midranges, and dual 5-1/4" woofers
  - Metal Matrix Diaphragm® drivers minimize distortion
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Infinity Primus PC351

Center channel speaker

Item# 108PC351BK offer details

Review Summary

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Your home theater's most important speaker

Our take on the Infinity Primus PC351

by Kristen Schaub

Highlights:

Shop all Infinity Center Channel Speakers

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs

Product Research

Our Product Research Team

Driver Technology

Enclosure Design

Connections

Product Reviews

Reviews for the Infinity Primus PC351

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Center speaker

Very good.

Infinity PC351BK Center channel speaker

Great center speaker.

I wish i did it sooner

Great Product

Excellent sound & value

Infinity Primus PC351

Infinity Primus PC351

Very pleased with this purchase

Nice Center speaker!

Very Pleased with purchase

Infinity Center Channel Speaker

A great addition to my audio system

Nice!

Great Value

Infinity Primus PC351

Terrific Home Theater Center Console Speaker

My 1st center

A Beast - Love it.

Accessories

Add accessories for the Infinity Primus PC351

You'll need wire to connect your center channel speaker to your amp or receiver.Cut your speaker wire to the exact length you need with a spool of bulk speaker wire. No wire is included with this speaker. See all categories & accessories

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Speaker Wire without Connectors

Connectors & Clamps

Speaker Wire with Connectors

Speaker Shelves

Speaker Stands

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