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Boss P55.4C

5-1/4" 4-Way Diecast Phantom Series Speakers

Out of Stock - Backorder

3-Year Manufacturer's Extended Warranty When Bought Here!

List price $69.99

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Boss Audio Store

General Features:

  • 5-1/4" Phantom Series 4-Way Car Speakers
  • Power Handling:
    • Peak: 600 watts per pair / 300 watts each
    • RMS: 300 watts per pair / 150 watts each
  • Electroplated injection molded polypropylene (IMPP) cone
  • Buytl rubber surround
  • 1-1/4" Mylar cone midrange
  • Two 1/2" Piezo tweeters
  • Diecast aluminum frame
  • 4 ohms impedance
  • 1-1/2" High temperature aluminum voice coil
  • Top-mount depth: 2"
  • Authorized Platinum Internet Dealer
  • 1 year Sonic Electronix, and 2 years Manufacturer's warranty

Priced Per Pair

Speaker Specifications

This is the manufacturer product line of speakers.
Phantom (Boss)
Priced Per
Car Speakers are typically sold in pairs so you will receive 2 speakers for each speaker purchase on speakers marked "Priced Per Pair". If a speaker is marked "Priced Per Each" then the speaker is sold individually and each purchase you make will result in 1 speaker. High-powered tweeters, midrange and full-range pro audio for car speakers are typically sold per each speaker.
Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
Tweeter Composition
Materials such as polypropylene, silk, cloth, and paper are the most common, where as many more recent tweeters are now manufactured with composites such as Aluminum, Titanium, Mylar, and other materials.

PEI is an acronym for "Polyetherimide" which is an amorphous, amber transparent, high-performance thermoplastic.

Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Mica Injected Polypropylene (MIPP)
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Butyl Rubber
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
300 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
150 watts
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
93 dB
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
85 - 20,000 Hz
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Bottom-Mount Depth
The depth when installed from the bottom of the mounting surface. Measured from the bottom of the speaker's magnet to the top of the mounting holes on the rim of the speaker.
Cutout Dimensions
Refers to the dimensions of the hole, measured in inches or millimeters, required to contain the speaker.
5" x 5" 
Speaker Grilles
A grating or screen of metal or plastic bars or wires, mounted in front of a speaker as protection. If yes, the speakers will include matching speaker grilles. If no, there are no grilles included.
Number of Speakers
This is the number of speaker that is included in the package. Each purchase will result in receiving the number of speakers indicated here. Please note that some items will have multiple woofers in the same enclosure. For sets of component speakers, this number will refer to the number of sets of speakers (For example, 2 would indicate the purchase includes 2 woofers and 2 tweeters).

Please refer to the product image and description for further details about the speaker.

Warranty and Return Policy

Parts Warranty Duration
3 years
Labor Warranty Duration
3 years
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating



sounds amazing

May 15, 2012

Real easy to install and sound amazing good bass and lots of tweet, all together they are loud and sound good.

6 of 11 found this helpful

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Reelsville, IN

great sound a cheap cost

November 5, 2013

These speakers have great sounds at the right volume but, so do all speakers. They are produce more treb at lower volumes. The bass is rly good at medium to high volumes. There is a point in the high volume that will distort the sound, all songs have different loudnesses they can reach before that happens but if u mix these speakers with subs u won't distort them no matter how loud

5 of 10 found this helpful

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vallejo, ca

Boss P55.4C

August 28, 2013

I buy these speakers they really sound good. I put them on a sport bike it has bass with the highs too. Good buy.

6 of 12 found this helpful

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Olanta, SC

great sound and value

September 5, 2012

Installed these with 6x9's and a 1600 watt amp to replace an infinity system. They sound great and handle full volume with no distortion!! They easily equal the sound of the infinity speakers they replaced.

3 of 6 found this helpful

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Cincinnati, OH

I will be buying more!!

January 24, 2012

I love the way they sounds right now cant wait until I put amp to them I bet they sound even better!

4 of 8 found this helpful

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Second Review

November 15, 2011

Had these hooked up to my amp 150 watts x 4channels at 4ohms. My head unit goes up to 62 and i had the amp up about 2/3 of the way. So i was maybe putting about 90 watts rms to these max. All 4 are now blown. These are good if you are only hooking them up to your head unit. But if you are looking for some real sound and hooking them up to an amp i would buy something of better quality.

2 of 4 found this helpful

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October 12, 2011

Ordered 2 sets of these monday, got them Wednesday. Hooked them up and they sound GREAT. Played with some settings through my head unit, will be hooking up an amp to these and turning the bass the whole way down to get as much as i can out of them.

2 of 4 found this helpful

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Oxford, MI

nice speakers at a great price

November 15, 2012

i bought a set of these speakers for my 99 ram i reviewed all the compititions offers for speakers but they just don't have good helpful websites this is why i chose sonic. for the price these boss speakers are quite awesome i have them running on a boss 4ch amp and ive had them kickn real loud and they sound sooooo clear and full bodied then only downer was i had to cut my mounting area to fit the speakers in flush to the pasnel other then that minor issue i have no complaints if your serious about car audio go with

2 of 5 found this helpful

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Placentia, CA

Good Speakers

September 3, 2012

These are pretty good speakers. As long as you are careful if you hook them up to an amp like I did is that you don't have the amp give them too much power and bass. They do put out pretty good bass for their size, but you can tell that its very easy running with an amp to blow them up if you give them too much. They sound great in my setup, no issues with them except they were kind of too deep for my car, but I made it work.

1 of 3 found this helpful

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October 15, 2011

These little speaker are the boss they rock the sound in the back of my car 600 watts of pure power and sound!

4 of 9 found this helpful

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Cincinnati, Ohio


July 10, 2011

I order these speakers wednesday got it friday they sounds real nice will be order more from yall again.....

2 of 6 found this helpful

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Accessory Tools and Products

Accessories added

Streetwires 25 ft. of True Spec 12 Gauge Speaker Wire

You need speaker wire to connect your speakers!

Your Price $44.95

Belva 23 ft. of True Spec 12 Gauge Speaker Wire

100% Copper Clad Aluminum, high strand count with ultra-flexible PVC blended jacket for easy installation

Your Price $14.99

12-10 AWG Yellow T-Tap Adapters

Allows for fast and easy splicing of wires by easily tapping into the cable.

Your Price $4.49

12-10 AWG Quick Disconnect Connectors

These yellow quick disconnect connectors make it easy to connect and disconnect speaker wire your to your new aftermarket speakers!

Your Price $6.99

NVX SDSK2 Speaker Kit

Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!

Your Price $14.99

Dynamat Xtreme Speaker Kit 10415

Enough sound dampening for 2 speakers!

Your Price $17.95

Stinger Roadkill Speaker Kit

Use this to eliminate rattle from your speakers!

Your Price $13.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $16.99

Universal Wire Puller & Grabber

Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!

Your Price $6.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

Your Price $14.99

Xscorpion WDCR2 Window and Door Clip Remover

Removes and installs handle and window crank clips.

Your Price $6.99

3 in 1 Wire Quick Splice T-Tap and Butt Connector Crimper + Wire Cutter

Used for cutting copper and aluminum wires up to 8 gauge.

Your Price $29.99

NVX SDRLR1 Sound Dampening Rubber Roller

Install your Sound Dampening with ease! This heavy duty rubber roller is designed specifically to install your NVX products!

Your Price $7.99

Speaker Baffles for your Speakers

Enhance the sound of your speakers with these easy to install speaker baffles.

Your Price $9.99

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• RMS Power: 60W
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Browse 2 questions and 3 answers
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Why did you choose this?
Sonic Electronix Store
better sound
kenneth l on Feb 10, 2015
great price
Daren G on Sep 4, 2014
are the wire connections spade type?
A shopper on Oct 24, 2014
Best Answer: Hello,

Yes, traditional Spade 'Quick Connects'.

The manufacture includes the Quick Connects for you;
Reply · Report · Customer SStaff on Oct 25, 2014
· Add Answer · I Have This Question Too (0)

Product Summary


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Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Boss P55.4C