MB QUART FKB108 Formula 3.5 Inch Speakers (pair)

Starting bid: $1.00

Up for auction is a pair of 3.5″ MB Quart coaxial speakers. Upgrade your factory speakers with these  beauties!! Our $1 no reserve auctions that can’t be beat!!! Good Luck and Happy Bidding!!!

Item condition: New

Time left:

Auction ends: March 26, 2026 8:28 PM
Timezone: America/New_York

Estimated Shipping: $8.00 - $12.00
Non-Continental Estimate: $

*Estimated shipping varies based on customer distance from warehouse

Description

Details & Specs

Type Speaker
Brand MB Quart
Series Formula
Category Mobile
Condition New
Color Black
Warranty 1 Year
Speaker RMS Power Handling (watts) 35
Speaker Peak Power Handling (watts) 70
Speaker Impedance (ohms) 4
Speaker Frequency Response 80Hz-20kHz
Speaker Sensitivity 88dB
Speaker Crossover Slope 6kHz 12dB
Speaker Mounting Diameter / Cut Out (in) 3.41
Speaker Outside Diameter (in) 3.41 No Grill
Speaker Mounting Depth / Chassis Depth (in) 1.5
Speaker Size (in) 3.5

Features & Benefits

Tweeters Aluminum dome tweeters deliver great sound with increased reliability.
Cone Material Lightweight thermal-formed polypropylene cones enable faster midrange response.
Surround / Cone Coupling Butyl rubber surrounds provide durability and deeper mid-bass impact. The cone/surround connection utilizes a high temp adhesive which assure the cone and surround do not separate in high power uses or extremes of weather.
Gasket A textured ABS gasket assures a rigid linear seal to the mounting surface.
​Voice Coil / Former Assembly Pure Copper voice coil creates a strong magnetic field with a very thin extrusion. Kapton voice coil former is lightweight and efficiently dissipates heat.
Spider Natural fiber allows flexibility while the infused epoxy gives strength during the manufacturing process.
Cooling System Over-coil cooling system allows air exchange over the voice coil through the spider
Crossover 6dB internal crossover integrated into the design to assure smooth midrange to tweeter frequency transitions.
Frame Heavy gauge progressive-die stamped steel frames for ultimate rigidity.
Motor Ferrite magnet motor creates a strong magnetic field while remaining small enough to fit nearly every application.
Connectors Use spade connectors or solder direct for the best connection. Tinsel Leads: Highly conductive while remaining flexible during high power applications.

Additional information

Weight 2 lbs
Dimensions 10 × 6 × 3 in