Both coaxial and component speakers ultimately do the same job — reproduce a full range of frequencies from a single mounting location — but they get there in fundamentally different ways, and that difference affects both installation and sound.
Coaxial: everything on one basket
A coaxial speaker mounts a tweeter directly on top of a larger woofer’s frame, combining full-range output into a single physical unit that drops into one factory opening. The Kicker 46CSC654 is a straightforward example — Speaker Type: Coaxial, one 6.5" unit per side, no separate crossover or tweeter mount required. This is by far the simpler install: it uses the same single factory mounting location a stock speaker already occupies, with no extra wiring or extra mounting spot to plan for.
Component: the same jobs, done by separate parts
A component speaker set splits those same jobs — low and midrange frequencies, high frequencies, and the crossover network that divides the signal between them — into physically separate pieces. A dedicated midrange or woofer driver handles the lower end, a separate tweeter handles the highs, and an external passive crossover splits the incoming signal so each driver only receives the frequency range it is built for. The Hertz SV-1651 is exactly this kind of piece — Speaker Type: Midrange, meant to be paired with a separate tweeter and crossover, not run alone as a full-range replacement.
Why separating the parts changes the sound
Combining a tweeter and woofer onto one coaxial basket is a compromise of convenience: the tweeter sits close to the woofer’s cone, which is simple to install but not the ideal physical placement for high frequencies, which image most accurately when positioned near ear height, separate from the low end. A component set’s separate tweeter can be mounted in a different, often higher, location — a pillar, sail panel, or dash corner — independent of where the midrange or woofer sits, which is the main reason component sets are associated with a more precise, better-imaging sound stage than a coaxial speaker mounted low in a door.
What a component set actually requires to install
The trade-off is installation complexity. A component set needs a mounting location for the woofer (often the same factory door opening a coaxial speaker would use), a separate mounting spot for the tweeter (which may or may not have an existing factory cutout — see our speaker-sizes guide for tweeter pods), and a place to mount the external crossover, plus the wiring to connect all three. None of that is difficult on its own, but it is meaningfully more planning than a coaxial swap, which uses the factory opening and factory wiring with no additional parts.
The crossover itself is worth planning for specifically, since it is easy to forget when budgeting time for the install. It needs a mounting spot with some airflow and protection from moisture — a door panel cavity or a spot behind kick-panel trim are both common choices — and it sits between the amplifier or head unit output and both drivers, so its wiring run has to reach all three components rather than just one. Skipping it, or wiring a midrange driver like the SV-1651 directly to a full-range signal without a crossover ahead of it, risks sending frequencies the midrange was never designed to reproduce, which is a real way to damage a driver that a coaxial speaker’s built-in design avoids entirely.
Which one makes sense for a given install
Replacing a blown factory speaker and want it to just work with minimal extra parts? A coaxial speaker matched to your factory opening size, like the 46CSC654 for a 6.5" door, is the direct, single-part replacement. Building a dedicated front-stage upgrade and have a mounting plan for a separate tweeter location? A component set, using a midrange driver like the SV-1651 alongside a matching tweeter and crossover, gives you more control over imaging and placement than a coaxial speaker can. Not sure you have a tweeter mounting spot? Check your vehicle’s factory locations before committing to a component set — a coaxial speaker sidesteps that question entirely by keeping everything in the existing factory opening.
- Coaxial: one unit, one factory opening, simplest install, tweeter position fixed to the woofer’s location.
- Component: separate woofer, tweeter, and crossover; more installation planning; tweeter can be positioned independently for better imaging.
- A component driver like the Hertz SV-1651, listed as Speaker Type: Midrange, is not meant to run alone — pair it with a tweeter and crossover rather than treating it as a drop-in coaxial replacement.
Browse Coaxial Speakers for a direct factory-location swap, or Component Speaker Sets and Tweeters & Midrange if you are planning a dedicated front-stage build.