Memphis MS42 MSeries 4 in 2-Way Coaxial Speakers - Convertible Design

In this review the Memphis MS42 MSeries 4 in coaxial speakers are evaluated as a compact, convertible option for drivers who want accurate, upgradeable sound without complicated installs. The single biggest reason to consider these speakers is the convertible coaxial design: the tweeter can be removed and repositioned for either component or coaxial layouts, which gives installers flexibility and keeps a consistent sonic character. For users seeking clear mids and defined highs in a small footprint, this speaker balances sonic quality and installation options.

Key Features

• Convertible coaxial design: The removable tweeter allows use as either a coaxial or component setup, making the speaker adaptable to different mounting locations and system needs.
• Carbon fiber cone: The stiff cone material delivers clearer midrange detail and controlled response at moderate volumes for better vocal and instrument clarity.
• External passive crossovers: Included passive crossovers sharpen the frequency split between woofer and tweeter for improved clarity and easier system tuning.
• Shallow mounting depth: With a 1.75 in mounting depth the MS42 fits many factory locations that deeper speakers cannot, simplifying upgrades in compact doors and panels.
• Durable build: A rubber surround and 10 oz magnet provide reliable excursion control and stable performance for regular in-car use.

Who It's For

The MS42 is best for drivers who want an easy-to-install 4 in speaker that improves clarity over factory units while offering future upgrade paths through the removable tweeter and external crossover. It suits small cars, motorcycles or any application where space is limited but a noticeable improvement in vocal and treble reproduction is desired.

Those seeking deep bass or very high power handling should look elsewhere; the MS42 is a modest performer with 40 w RMS and 80 w peak and is optimized for accurate midrange and highs rather than low-frequency output. Also, buyers who want a full component set out of the box may prefer dedicated component speakers instead of this convertible coaxial option.

Pros & Cons

Pros

• Convertible tweeter design provides flexibility for coaxial or component-style installations.
• Carbon fiber cone and rubber surround deliver clear mids and durable mechanical behavior.
• Compact 1.75 in mounting depth fits tight factory locations without modification.

Cons

• Limited low-frequency output due to small 4 in size and modest power handling.
• Not a complete high-end component package out of the box for audiophile builds.

Specifications

Size	4 in
RMS Power	40 w
Peak Power	80 w
Mounting Depth	1.75 in
Magnet Size	10 oz
Sensitivity	87 dB
Design	Coaxial with external passive crossovers

Our Verdict

The Memphis MS42 MSeries 4 in speaker is a smart, value-focused upgrade for drivers who want clearer mids and treble with flexible installation options. Its convertible tweeter and external crossover make it a practical choice for tight spaces and modest systems; buyers who prioritize punchy bass or very high power handling should consider larger drivers, but for balanced sound in compact locations the MS42 is a good value.

Frequently Asked Questions

Can the tweeter be used separately?
Yes, the tweeter is removable so it can be mounted as part of a component setup or left coaxial depending on installation needs.

Will these fit behind factory grilles?
The shallow 1.75 in mounting depth helps compatibility with many factory locations, but measure clearance and grille depth before purchase.

Are crossovers included?
Yes, external passive crossovers are included to manage the frequency split between the woofer and tweeter.