Expert Service 1-877-289-7664 [Hours]

Pyramid PW677X

150W 6.5" Power Series Single 4 Ohm Mid-Bass Driver

In Stock. Only 1 Left!

List price $39.99

You Save: $10.04 (25.11%)


with warranty

Order within 17 hrs to ship 3/27

Arrives by Wednesday, Apr. 1 to zip 07095

60-Day Money-Back

Hassle Free Returns

Low Price Guarantee

Seen it for less? Click here

365-Day Coverage

Warranty assistance for a year

In Stock. Only 1 Left!

Arrives by Wed, Apr. 1

Get FAST answers from customers ASK a Question See questions answers

General Features:

  • 6-1/2" Single 4 Ohm Power Series Car Subwoofer
  • Power Handling:
    • Peak: 300 watts
    • RMS: 150 watts
  • Impedance: 4 ohms
  • Injection-molded Polypropylene Cone
  • Specially treated black Rubber edge suspension
  • Chrome finished speaker basket
  • 1" high-temperature voice coil
  • Silver plated spade terminals for easy connection
  • Bumped and vented yoke plate for extended excursion
  • 40oz. magnet motor structure
  • Rubber magnet boot cover
  • Top-mount depth: 2-7/8"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Priced Individually

Subwoofer Specifications

Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
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
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
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
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
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".
86 dB
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
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.
Injection Molded Polypropylene (IMPP)
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.
Magnet Structure
Defines the overall structure of the subwoofers magnet.
Single Stacked
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.

Electromechanical Parameters

Free-Air Resonance (Fs)
The free-air resonance frequency of the subwoofer, measured in Hz. At this frequency the weight of the moving parts is perfectly balanced with the subwoofers suspension system.
55 Hz
Total Speaker Q Value (Qts)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
Electrical Q Value (Qes)
The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 10.
Mechanical Q Value (Qms)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 10.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating

The Kish


Best bang for the buck

March 11, 2014

Used this to replace the stock subwoofer on the promedia computer speaker system. This woofer is built better than the stock sub and sounds just as good. only drawback was the terminals were the same size which was hard to distinguish which was positive and negative as there were no etch marks. The exposed cone gives the box a more stylish look to the system as well. Overall great buy.

13 of 22 found this helpful

Was this review helpful to you?


lothian md

great value

September 19, 2013

Item as described, shipped quickly, well packed, we thank you

16 of 28 found this helpful

Was this review helpful to you?


Fresno ca

Good speaker

April 27, 2014

It is a very good speaker, good looking and loud.

14 of 25 found this helpful

Was this review helpful to you?


St. Charles, MO

Good replacement sub!

June 12, 2013

I bought this sub to replace the factory sub in my 95 Lincoln Town Car as the old one was just done. This new one installs easily in the factory sub enclosure with a little modification. You will need to make new holes for the new sub to attach to the enclosure. The sound is great and the bass is tight. It has enough bass for me. I would recommend this sub to anyone who wants a direct replacement for a 95-97 Town Car with the JBL system.

13 of 23 found this helpful

Was this review helpful to you?


St Louis

Good deal

February 13, 2014

I used this to replace a speaker in a Klipsch 2.1 Promedia after the foam fell apart at around 8 years old. I dunno if this one will last 8 years but it sounds the same so far. I am just leaving it unprotected (no grill). The original speaker grill won't fit because the OEM speaker has a integral plastic ring for that, but the OEM speaker is not exactly a standard type so that's not a shortcoming of this product.

12 of 23 found this helpful

Was this review helpful to you?

Brant Jones, aka RusH x Famous

Saint Simons, Ga

This thing is so tight

January 17, 2012

I put this in my 2002 Mazda Millenia and it kicks so freaking hard. I put about 50 watts through each of them! Some day want to upgrade to some 8" subs that would be nice.

13 of 25 found this helpful

Was this review helpful to you?


Raleigh, NC

Hits Good

October 19, 2013

Bought this to replace the blown sub in my computer set: Klipsch 2.1, Easy install, sounds great, looks good.

10 of 21 found this helpful

Was this review helpful to you?


Spirit Lake, IA

Best Subs Ever Made!!!

March 14, 2012

Ya, my friend has 4 subs, and he says that my subs are insane!! I have 6 of these bad boys in my custom made box and they hit so hard. Never even consider buying anything other than these. Good buy for the price.

11 of 24 found this helpful

Was this review helpful to you?


fairport, NY

BMW Z3 Sub

September 23, 2013

Used to replace the factory Harmon Kardon sub in a 01 Bmw Z3.
Perfect fit in the factory enclosure.
Works fine, remember this is a classic open roadster not a street thumpin rice burner.

13 of 30 found this helpful

Was this review helpful to you?


Dillsburg, PA

Good speaker for the money

November 12, 2012

Well for the price of the speaker it delivers really good performance. I picked this up for my little brother's 97 Explorer that had the factory JBL stereo package which featured a 6.5" powered sub in the back. This factory speaker was worn out and rattling pretty badly due to the foam ring connecting the cone to the frame of the speaker disintegrating over time. It fit well and only took maybe a half hour to properly install it and seal it with the factory installed box. It sounded pretty good for the price. Definitely not the best speaker out there but for the money to sounds good. I'm not sure what the wattage output of the jbl amplifier is but it adequately powers this speaker. It's been installed for over 6 months so far and haven't had any problems.

10 of 26 found this helpful

Was this review helpful to you?


Myrtle Beach, SC

Sounds and hits great! (Used in for a home system.)

May 30, 2012

Used this sub to replace a dieing RCA sub that I ended up blowing using another amp. The step up in sound is incredable. No, this is not used in the living room but my bedroom so I can not say how it sounds in a car or in a large room but it rattles things in the bedroom and sounds good doing it. Can't comment on durability as time will only tell if it last or not but from the quality of the build and the magnet size and the cone material it seems the product should last fine. SHOULD. So unless it blows in sometime soon I recommend this sub for anyone wanting to replace a cheap home stereo or simply wants to add a tiny bit of punch to their car.

11 of 29 found this helpful

Was this review helpful to you?

Accessory Tools and Products

Accessories added

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $9.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $59.99

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $94.95

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $69.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $6.99

40" x 15 Ft Piece of Premium Un-Backed Automotive Trim Carpet

Durable design for long life-span, available in many colors and shades.

Your Price $39.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $1.99

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

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

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $79.99

4 Ft of 1/4" Thick Black Heat Shrink Tubing

Provides abrasion resistance and added protection for your cables.

Your Price $3.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

1 Pyramid PW677X Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Pyramid PW677X Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

3 Pyramid PW677X Subwoofers

4 Channel Amp

4 Pyramid PW677X Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 2 questions and 2 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
Need to replace Sub in 1996 Lincoln Towncar
Virginia Ginny W on Dec 18, 2014
can this be use in a 2003 toyota camry???
kc4566 on Nov 25, 2014
Best Answer: I am not sure about the Toyota but I used the 6.5" version for the mid-range sub in my 97 ford explorer without a problem
Reply · Report · Chris D on Nov 25, 2014
· Add Answer · I Have This Question Too (0)

Product Summary


Model Number






Internal SKU


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: Pyramid PW677X