Are Aftermarket Car Speakers Worth It Over Factory?
By Robert Jones · 2026-07-23
Are aftermarket car speakers worth it over factory ones? Honestly, after twenty years in the game, it's a no-brainer if you care about your tunes on the road. The factory stuff is almost always rubbish. Come on, let's sort it out.
Right then, let's talk car audio. For donkey's years, I've had people asking me the very same thing, usually after they've splashed out on a new motor or finally got fed up with the dreary, muddy racket coming from their trusty old banger: "Are aftermarket car speakers actually worth the faff over what the factory shoves in?" It's a cracking question, and one I know a fair bit about, having spent decades mucking about with car systems in all sorts of vehicles. My workshop in Bristol's seen more car doors opened than a busy garage, trust me. I've had my ears on everything from bespoke, eye-watering setups in supercars right down to a simple speaker swap in a knackered old Transit van. The answer, ninety-nine times out of a hundred, is a resounding "yes, if you've got ears and care about what goes into 'em." ### **Quick Verdict: Worth every penny if your music matters to you.** Now, factory speakers. They're called "factory" for a reason, aren't they? They're built to a price, bolted in on an assembly line, and designed to do *a* job – which is to make some sort of noise come out of your dashboard. They are, almost without exception, *not* designed to make *good* noise. Most car manufacturers aren't exactly falling over themselves to fit custom-designed, hi-fi drivers in your average Vauxhall Corsa, are they? Not a chance. They're fitting something that's dirt cheap, slots into the designated hole, and, with a bit of luck, won't fall apart on the first pothole. I vividly remember one particular job, years back. I was helping a mate upgrade the system in his old Nissan Micra. The factory speakers in that thing were, and I'm being kind here, an absolute disgrace to anything resembling sound. Thin, reedy, no bass to speak of – just a tinny, grating noise. Honestly, the bloke deserved better. We shoved in some cheap but cheerful Pioneer two-ways, and he thought I'd performed a miracle. Just goes to show, doesn't it?  *Are Aftermarket Car Speakers Worth It Over Factory? — tested in the SpeakersMag workshop. This pic is from when I was testing out some new wiring looms, not the actual speaker replacement, mind. Just a good shot of a door panel stripped down.* ## Why Factory Speakers Usually Fall Flat on Their Face Think about it for a sec. Car makers are always juggling cost, reliability, and trying to appeal to the broadest possible market. The audio system is one of the easiest spots to cut corners without most buyers even noticing on a quick spin around the block during a test drive. They're certainly not selling cars based on their soundstage or frequency response – nobody ever walked into a showroom and said, "Right, I need to hear that glorious midrange before I sign on the dotted line!" ### Budget Constraints: The Root of All Evil (in Car Audio) Every single component in a car has a budget attached to it. The standard speakers? Yeah, they're usually scraping the bottom of that barrel. They use the cheapest materials going, tiny magnets that look like they've come out of a fridge magnet, and flimsy cones. It's a bit like someone buying a swanky, bespoke suit and then wearing a pair of knackered old trainers with it. Just doesn't work, does it? The whole package suffers. ### Material Quality: Night and Day Ever picked up a factory speaker in one hand and then a half-decent aftermarket one in the other? The difference, even if you're not an audio engineer, is immediately obvious. Factory speakers often come with paper cones that are barely treated, which warp like mad with temperature and humidity changes. Tiny, weedy voice coils and magnets that struggle to control the cone are the norm. They're just not built to last or to move enough air properly. Aftermarket speakers, even the ones that won't break the bank, typically use far superior materials. You'll see polypropylene, well-treated paper, or even woven fibres like glass fibre or carbon fibre for the cones. They nearly always have much larger magnets and more robust, properly engineered construction. All this adds up to better sound, plain and simple, and usually a speaker that'll outlive the car itself. ### Design Limitations: Fitting vs. Performing Another big one. Factory speakers are designed to fit the specific hole they're allotted. That's their primary job. Performance often comes a very distant second. The magnet size, the mounting depth, the shape of the basket – it's all dictated by the often tight and awkward confines of a car door, dashboard, or rear parcel shelf. There's not a lot of acoustic consideration going on beyond "will it physically go in there?" Aftermarket manufacturers have a bit more wiggle room. While they still need to fit common speaker sizes, they'll optimise the motor structure, the surround, and the suspension to really get the best acoustic performance possible. They might have a deeper magnet, or a better-designed voice coil former. It's all about getting the most out of the available space, rather than just filling a hole. ## What You Get with Aftermarket Speakers So, what's the big deal? What makes that swap so often worthwhile? ### Clarity and Detail: Hear What You've Been Missing This is usually the first thing people notice. Factory speakers often smear the sound, especially in the midrange and treble. With aftermarket units, you suddenly hear instruments you never knew were there. Vocals sound clearer, crisper. You can distinguish between different drums, hear the shimmer of a cymbal instead of just a hiss. It's like cleaning a dirty window – suddenly, the view is so much better. ### Deeper, Tighter Bass: No More Boom and Thump Forget that flabby, uncontrolled bass you often get from factory units. Aftermarket speakers, thanks to better cone materials, stronger magnets, and more efficient voice coils, can produce bass that's not just louder, but far more controlled and accurate. You'll feel the kick drum in your chest rather than just hearing a vague thump. It integrates properly with the rest of the music, instead of sounding like a separate, poorly recorded track. ### Better Power Handling: Turn it Up! Factory speakers are designed to handle the measly 10-15 watts per channel that most factory head units put out. Push them too hard, and they distort, break up, or even blow. Aftermarket speakers are built to take more punishment. Even if you're not adding a separate amplifier, a good aftermarket speaker will often sound cleaner and more dynamic at higher volumes simply because it's not struggling. If you *do* add an amp later, you're already halfway there. ### Durability: Built to Last As I mentioned, those cheap paper cones and flimsy surrounds in factory speakers don't stand up well to the harsh environment of a car – temperature swings, humidity, vibrations. Aftermarket speakers, with their better materials and construction, are generally far more durable. They're designed to cope with years of use, often outliving the car itself. I've pulled speakers out of twenty-year-old cars that still sounded mint, purely because they were quality aftermarket units installed properly back in the day. ## Types of Aftermarket Car Speakers It's not just a case of "new speakers." There's a bit of choice involved. ### Coaxial (Full-Range) Speakers These are your most common upgrade. All the speaker components – woofer, tweeter, sometimes a mid-range – are combined into a single unit. They're designed to fit directly into the existing factory openings, making them a pretty straightforward swap for most DIYers. Great for a quick and noticeable upgrade, and generally kinder on the wallet. Most of the jobs I do for mates tend to involve a decent set of coaxials. ### Component Speakers Now we're getting a bit more serious. Component systems separate the tweeter, woofer, and often come with external crossovers. This allows for much better sound imaging and staging, as you can mount the tweeter higher up, usually in the A-pillars or closer to ear level. The separate crossover network directs the right frequencies to the right driver, resulting in much cleaner, more accurate sound. They're a bit more involved to install, often requiring custom mounting for the tweeters and finding a spot for the crossovers, but the sonic rewards are well worth it for anyone who truly cares about their music. This is what I usually recommend if someone's serious about upgrading their car sound. ### Subwoofers While not strictly "car speakers" in the traditional sense, a subwoofer is often the final piece of the puzzle for a truly full-range sound system. Your standard door speakers, even good aftermarket ones, are limited in how low they can go. A dedicated subwoofer handles those ultra-low frequencies, taking the strain off your main speakers and allowing them to focus on the mids and highs. It's not about making your car rumble down the street (unless that's your thing, no judgement!), but about adding depth, impact, and a realistic foundation to your music. If you like your bass, a sub is a must. ## Who It's For and Who Should Skip It So, is this upgrade for everyone? Not necessarily. Let's break it down. **Who it's for:** * **Anyone who enjoys music in their car:** If you spend any significant time driving and like listening to tunes, even just the radio, you'll notice the difference. * **People fed up with muddy, weak, or distorted sound:** If your current system makes you wince, this is your solution. * **DIY enthusiasts:** Many coaxial swaps are straightforward and satisfying projects. * **Those on a reasonable budget:** You can get a solid upgrade for under £100-£200 for a decent set of door speakers. * **Owners of older cars:** Factory tech has come a long way, but an old car often means truly dreadful factory sound. **Who should skip it:** * **If you genuinely don't care about sound quality:** If news radio or podcasts are your only in-car listening, you might not notice or appreciate the upgrade. * **Leasing a car for a short period:** Unless you can easily reverse the changes, it might not be worth the investment. * **Strictly against any modifications:** Some folks just want their car as it left the factory, and that's fair enough. * **On a super tight budget for *any* car improvement:** There might be other, more pressing mechanical concerns for your vehicle. ## What to Look For When Buying Aftermarket Speakers Right, you're convinced. But what should you actually buy? It can be a minefield out there. ### Size Matters (for Fitting) First things first: what size speakers does your car take? The most common sizes are 6.5-inch (16.5cm) and 5.25-inch (13cm) rounds, or 6x9-inch ovals for the rear. Pulling off a door card to measure or checking your car's manual/online forums is step one. Don't buy something that won't fit! You'll also need to consider mounting depth – some deeper speakers might foul window mechanisms or door panels. ### Power Handling (RMS) Look for the RMS (Root Mean Square) power rating, not the peak power. RMS is the continuous power a speaker can handle. Match this roughly to the power output of your head unit or amplifier. If your head unit puts out 15W RMS, there's no point buying speakers rated for 100W RMS – you won't be driving them properly. Conversely, if you plan on adding an amplifier later, buy speakers that can handle the amp's power output. ### Sensitivity (Efficiency) This tells you how loud a speaker will play with a given amount of power. A higher sensitivity (e.g., 92dB) means the speaker will play louder with less power than a lower sensitivity speaker (e.g., 88dB). If you're sticking with your factory head unit and its low power output, look for speakers with higher sensitivity. If you're running an external amplifier, sensitivity becomes less critical. ### Material Choices **Cones:** Polypropylene is a good all-rounder – stiff, light, and resistant to moisture. Treated paper is also common and can sound great. More exotic materials like silk, woven glass fibre, or carbon fibre tend to be in higher-end speakers and offer improved rigidity and lighter weight for better response. **Tweeters:** Silk dome tweeters are usually smoother and less fatiguing to listen to. Metal dome tweeters (aluminium, titanium) can be brighter and more detailed but can sometimes sound harsh if poorly designed or paired with a bright amplifier. In a car, where sound can be a bit chaotic, I often lean towards silk. ### Brand Reputation and Reviews Stick to reputable brands like Pioneer, Kenwood, Alpine, Focal, JL Audio, Hertz, JBL, Infinity, Polk Audio. There are plenty of others, but these have consistently produced good kit over the years. Read reviews, but take them with a pinch of salt – what one person loves, another might hate. Try to find reviews from people with similar cars or musical tastes. ## Installation Considerations This isn't just about screwing in a new speaker. A proper job makes all the difference. ### Wiring While you can often use existing factory wiring for a straight swap, upgrading the wiring can sometimes eke out a little more performance, especially if your factory wiring is thin or degraded. If you're adding an amplifier, dedicated speaker wire is a must. ### Sound Deadening This is the secret sauce that many people overlook. Car doors are basically resonant metal boxes. Adding sound deadening material (like Dynamat or Silent Coat) to the inner and outer door skins makes a huge difference. It stops rattles, reduces road noise, and most importantly, turns your door into a much more solid enclosure for your speaker, massively improving mid-bass response and overall clarity. Honestly, if you're doing speakers, spend the extra £50-£100 on some decent deadening. You'll thank me. ### Adapters and Spacers Sometimes, aftermarket speakers won't quite fit the factory hole perfectly. You might need plastic mounting adapters or spacers to ensure a snug fit and proper clearance. These are cheap and readily available for most cars. Don't bodge it with wood screws and hope for the best – do it properly! ## Aftermarket vs. Factory: A Closer Look Let's be blunt about this. Here's a comparison that cuts through the marketing fluff. | Feature | Factory Speakers | Aftermarket Speakers | | :------------------ | :------------------------------------------------------ | :------------------------------------------------------ | | **Materials** | Cheap paper cones, small magnets, flimsy surrounds | Polypropylene, treated paper, woven fibres; larger magnets, durable rubber/foam surrounds | | **Design Focus** | Cost-cutting, ease of assembly, fitting a specific hole | Acoustic performance, sound quality, durability, common fitment | | **Sound Quality** | Muffled, weak bass, harsh highs, poor detail | Clearer highs, detailed mids, tighter bass, improved soundstage | | **Power Handling** | Low (5-15W RMS), easily distorted at higher volumes | Moderate to high (20-100W+ RMS), handles more power cleanly | | **Durability** | Prone to warping, degradation from elements | Built for longevity, better resistance to temperature/humidity | | **Upgrade Path** | Limited without replacing the whole system | Excellent foundation for further upgrades (amps, subs) | | **Cost** | Included with vehicle purchase, essentially "free" | From £50 to £500+ per pair, varying significantly | | **Installation** | Pre-installed | Requires DIY or professional installation, sometimes adapters | ## Brands I've Had Good Luck With (and a few to be wary of) Over my 20-odd years in this game, I've seen fads come and go, but some names consistently deliver. **Solid Performers (Good Value to High-End):** * **Pioneer:** Always a safe bet for coaxial speakers. Decent sound for the money, reliable. Good entry point. * **Kenwood:** Similar to Pioneer, often a bit punchier. Another good staple. * **JBL/Infinity/Harman Kardon:** All part of the same group, and generally offer good performance across different price points. JBL often has a more "lively" sound. * **Focal:** French brand, top-notch. If you've got a bit more cash and are serious about sound, their component sets are fantastic. A real step up. * **Hertz:** Italian, also very well-regarded for their clarity and dynamic range. Bit more premium. * **JL Audio:** Excellent for bass, and their component speakers are seriously good too. If you want proper low-end, these are a go-to. * **Alpine:** Their component speakers can be excellent, though sometimes a bit pricy. Good clean sound. **Brands to Approach with Caution (or Avoid if you're on a budget but want quality):** * **No-name eBay specials:** You often get what you pay for. They might boast huge "peak" power figures, but the reality is usually dire sound and quick failure. Steer clear if you care about quality. * **Some budget "big brand" ranges:** Even the good brands sometimes have absolute entry-level speakers that are barely an improvement on factory. Read reviews specifically for the model number, not just the brand name. Honestly, I've fitted hundreds of sets of speakers. For a solid, affordable upgrade, a £70-£150 set of Pioneer or Kenwood coaxials with a bit of sound deadening will utterly transform most cars. If you're splashing out a bit more, say £200-£400, a Focal or Hertz component set will blow your mind, especially if powered by a small amplifier. ## FAQ: Your Burning Questions Answered ### Q: Can I just replace my existing speakers without changing the head unit (car stereo)? A: Absolutely, yes! This is one of the most common and effective upgrades. Even with the relatively low power of a factory head unit, better quality aftermarket speakers with higher sensitivity will almost always sound significantly clearer, more detailed, and have better bass response than the OEM ones. It's a great first step. ### Q: Do I need an amplifier if I upgrade my speakers? A: Not necessarily straight away. As mentioned above, a speaker upgrade alone is often a massive improvement. However, if you want to unlock the full potential of higher-end aftermarket speakers, especially component sets, adding a dedicated amplifier will provide more clean power, better control, and significantly improve dynamic range and overall volume capability. It's a good next step once you've got the speakers in. ### Q: Is installing aftermarket speakers difficult for a DIYer? A: It really depends on the car and the type of speaker. Replacing coaxial speakers in most car doors can be a relatively straightforward DIY job if you're comfortable with basic tools and watching a few YouTube tutorials specific to your car model. Component speakers with separate tweeters and crossovers are more involved and might be best left to a professional installer or a very confident DIYer. Sound deadening adds a bit more complexity but is well worth the effort. ### Q: Will aftermarket speakers void my car's warranty? A: Generally, no. Replacing speakers is considered a modification to the audio system, not a critical mechanical or electrical component of the car itself. Manufacturers usually can't void your entire warranty for a speaker swap. However, if the installation is done poorly and causes damage to other electrical systems (e.g., a short circuit), then that specific damage might not be covered. Always best to do a clean, professional job or get it done by someone reputable. ### Q: How much should I expect to spend on a decent upgrade? A: For a noticeable and worthwhile upgrade, you're probably looking at **£70 - £150** for a good pair of coaxial speakers for the front doors. If you want to go for a component set with better sound quality, expect to pay **£150 - £300+**. Add another **£50 - £100** for sound deadening materials, which I can't recommend highly enough. Professional installation, if you go that route, will add a fair chunk on top, so always get quotes. ## Final Word So, after all that, are aftermarket car speakers worth it over factory ones? In my book, almost always. The difference is rarely subtle. It's like going from listening to music through a tin can to actually being at a gig. For anyone who enjoys their music while they're driving, it's one of the most cost-effective and rewarding upgrades you can make to your car. It doesn't have to cost the earth either. A bit of research, a decent set of coaxials, and maybe some sound deadening, and you'll wonder how you ever put up with the factory rubbish. Go on, give your ears a treat. You spend enough time in your car, make the sound count. You won't regret it, I promise you that.