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MB Quart ZK1-169

6 x 9" Z-Line Series 2-Way Coaxial Car Speakers

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List price $279.99

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MB Quart ZK1-169

6 x 9" Z-Line Series 2-Way Coaxial Car Speakers


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NVX 25 ft. of True Spec 12 Gauge Speaker Wire

100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.


Car Stereo and Speaker Installation Tool Kit

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


NVX SDSK2 Speaker Kit

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



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MB Quart Audio Store

Z-Line Series: Designed for Sound Quality

MB Quart's Z-Line Speakers reproduce a smooth and pleasant reproduction of your music. The tweeter has a nylon surround to reduce the resonance frequency for a more balanced high-end. The basket is a cast nylon material with the original German-spec material. These speakers are also designed to last. Military grade "A" titanium is used throughout the Z-Line speakers to ensure they can play loud and sound great. These MB Quart Z-Line speakers are a great addition to a car audio system.

General Features:

  • 6 x 9" Z-Line Series 2-Way Car Speakers
  • Power Handling:
    • Peak: 280 watts per pair / 140 watts each
    • RMS: 140 watts per pair / 70 watts each
  • Mica-filled PP cone mated to UV butyl surround
  • Composite basket w/original German-spec material
  • PA6 cast nylon + 15% glass fiber material basket
  • 1" (30mm) ceramic coated titanium dome tweeter
  • Military grade “A” titanium Dome
  • Nano ceramic coating for extended range
  • High heat tolerance handles more power
  • Greatest weight to strength ratio of any metal
  • Smooth response within the audible range
  • Tweeter features nylon surround for lower fs
  • 12bd/octave crossovers used throughout line
  • Removable phase lens allows the tweeter to be tuned for the application
  • 4 ohms impedance
  • Frequency Response: 20-20,000 Hz
  • Sensitivity: 89dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Priced Per Pair

Speaker Specifications

This is the manufacturer product line of speakers.
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.
6" x 9"
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 Size
Refers to the size of the tweeter. Typically, smaller tweeters produces less output with higher frequency response.
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)
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.
280 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.
140 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".
89 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).
20 - 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.

Hi-Res Audio Compatible
This feature refers to if the product is capable of Hi-Res Audio (HRA) playback.
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
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

D. Breeden

Gordonsville Va.

Z-Line 6x9

November 20, 2015

Installed these in the doors of a Nissan Titan. Removed a pair of Infinity Ref, These MB Quarts sound amazing. So much more detail in the music, every song I play sounds incredible, I don't have a clue why people say the speakers are not what they used to be. I have changed all my speakers to the quarts and my system is at a new level. The infinitys sounded good but the quarts are unreal, the sound files the vehicle with so much sound and detail you don't want to stop listening, and they stay very clean at high volume levels. I have a Hifonics 80x2 amp running them and I am super pleased. MB Quart for life, no speakers I have ever heard comes close to these!!!

3 of 4 found this helpful

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Accessory Tools and Products

Accessories added

NVX 25 ft. of True Spec 12 Gauge Speaker Wire

100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.

Your Price $39.99

Streetwires 25 ft. of True Spec 12 Gauge Speaker Wire

You need speaker wire to connect your speakers!

Your Price $49.95

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

Car Stereo and Speaker Installation Tool Kit

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

Your Price $18.99

NVX XTGSP2 Tone Generator and Speaker Polarity Tester

Perfect for safely troubleshooting and testing audio systems

Your Price $29.99

Xscorpion WDCR2 Window and Door Clip Remover

Removes and installs handle and window crank clips.

Your Price $8.99

Encore Universal Four Door Power Door Lock Kit

Add Power Door Locking and Unlocking while you have the Door Panels removed

Your Price $29.99

NVX SDSK2 Speaker Kit

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

Your Price $14.99

Stinger Roadkill Speaker Kit

Use this to eliminate rattle from your speakers!

Your Price $10.99

NVX Sound Dampening Rubber Roller

Install your Sound Dampening with ease using this heavy duty rubber roller!

Your Price $7.99


Creates a tight seal around the speaker for enhanced audio quality and imaging.

Your Price $29.99

Xscorpion USP-69 6" x 9" Speaker Baffles

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

Your Price $3.99

XTC 6" x 9" Foam Speaker Baffles

Compresses and forms to the shape of most installations and reduces panel vibrations.

Your Price $12.99

12-10 AWG Butt Connectors

These yellow butt connectors are ideal when connecting thicker speaker wire your new aftermarket speakers.

Your Price $5.99

12-10 AWG Yellow T-Tap Adapters

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

Your Price $2.58

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 $11.99

Sonic Sub Boxes 6X9_PANDA_BOX

6" x 9" Wedge Box (Priced Individually)

Your Price $14.99

Atrend 6X9PR

1 Pair of 6" X 9" Speaker Boxes Made with 3/4" Hardwood MDF

Your Price $24.95

Browse 2 questions and 4 answers
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Why did you choose this?
Sonic Electronix Store
Because I want to try this one!
Teiva B on Jun 21, 2016
Used to have MB Quarts back in the day, best sounding speakers I have ever heard. Im building a SQ system and these should help a lot. I researched a lot about the new quarts and found they are still German design but made in China, but gonna give them a shot.
Don B on Nov 16, 2015
I have heard a lot about mb quart and the price was awsome at sonic electronix and wanted to give them a try! Thanks, RLH
Reggie H on Feb 8, 2016
product requested bu car builder
Ralph R on Oct 29, 2015
I own an 07 Nissan Murano, what are the correct speaker size for the front speakers?
Kerry O on Apr 24, 2015
· Add Answer · I Have This Question Too (0)

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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: MB Quart ZK1-169