How to Install Subwoofers WITHOUT Replacing Your Stock Stereo (2024)

by Hi-Tech Car Audio | 18th Mar 2023

How to Install Subwoofers WITHOUT Replacing Your Stock Stereo (1)

So here’s the rub…

You want to add a little boom-boom to your car but either…

1) You can’t replace the stereo system because it’s a new model (or it’s exotic) or…

2) You just don’t want to replace the stereo because you like the factory look.

In either case, you can’t install a bass system to your factory stereo.

Why?

Well, factory stereos don’t have something called ‘RCA pre-outs’.

These are the red and white inputs behind stereos that rca jacks plug into to produce sound…

…and factory stereos just don’t come equipped with them.

But is all lost?

Are you going to have to live with that transistor radio sound of your factory system?

Definitely not.

Here are two ways you can install an amp and sub combo to your factory system:

1. Hi-Low Converter

This has been the tried-and-true method of installing bass systems to factory stereos for decades.

It’s just a simple little converter that ties into your speaker wires and provides RCA inputs.

How to Install Subwoofers WITHOUT Replacing Your Stock Stereo (2)

It’s fairly inexpensive and sounds pretty good.

The only problem?

You won’t get the exact same sound quality from your subwoofers as you would if you had an aftermarket stereo (like Alpine or Kenwood) in your car.

The reason is that you’re not enhancing the voltage of the stereo, and therefore aren’t giving it the proper “juice”.

Still, it sounds fine unless you’ve got a meticulous ear like me.

If that’s the case you’ll want to use…

2. A line out converter

A line out converter is like a hi-low converter – but on steroids.

In techie terms:

…it takes amplified speaker level signals and converts them into high quality preamp signals that can be fed into an amplifier.

For us humans, that just means you’ll get phenomenal sound ALL while keeping your factory stereo and controls.

TheAudioControl LC2i PRO is a great example of a premium line out converter:

How to Install Subwoofers WITHOUT Replacing Your Stock Stereo (3)

This little puppy can even work if you have a premium factory system in your car – but still want to get more bass.

It takes the hi-level signals of your factory amp and drops them down to the line level that your amplifier needs – all without compromising the fidelity of the factory system.

Honestly, we rarely recommend hi-low converters unless a customer is on a shoestring budget.

Funny enough, hi-low converters typically cost $20… while theAudioControl LC2i PRO goes for only $133. Not that big a difference.

So now you know – it’s definitely possible to install a subwoofer and amplifier to your factory system, and still have it sounding good.

If you’d like to know more about how to get a killer system set-up in your car without swapping your stereo, give us a call at 510-527-9888.

Our team has more than 33+ years of experience in the mobile electronics industry, and we’ll make your car sound like Beethoven’s 5th (or Woodstock… whatever you prefer)

How to Install Subwoofers WITHOUT Replacing Your Stock Stereo (2024)

FAQs

How to Install Subwoofers WITHOUT Replacing Your Stock Stereo? ›

Hi-Low Converter

Can I install a subwoofer with a stock radio? ›

You can connect an aftermarket subwoofer to a factory radio, but requires a few more additional steps than connecting to the stereo's speaker outputs. The first thing you will need to purchase in addition to your new subwoofer is a monoblock amplifier.

Can I just add a subwoofer to my car? ›

Adding a subwoofer to your audio system generally means also having to purchase and install an amplifier to power it. All-in-one amplified subwoofer enclosures offer the convenience of built-in power matched to the subwoofer specs.

Can I add an amp to my factory stereo? ›

To add an amp, you'll have to use the factory amplifiers' outputs for your aftermarket amp's high-level inputs. Make sure it can handle at least 12V, otherwise you'll need to use a line output converter (LOC) for the amp's input.

How do I add a subwoofer to my stereo? ›

Connect a subwoofer through the subwoofer output (SUB OUT or SUBWOOFER) of a receiver using an LFE cable. Connect using an RCA cable if there isn't an LFE subwoofer output or LFE input. If the subwoofer features spring clips, use the speaker output of the receiver to hook it all up.

Can you connect subwoofer directly to car stereo? ›

Locate the subwoofer input on your car stereo and plug one end of the RCA cable (or Y-adapter) into it. For the other end, connect it to the input on your subwoofer.

Do I need an amp if I install a subwoofer? ›

Remember, if you're adding a sub to a factory system, you'll need a subwoofer amp that has speaker-level (high level) inputs, so it can get its signal from the factory speaker wires or you can buy a high to low converter, if the amp you own or purchase doesn't have high level inputs.

How difficult is it to install a subwoofer in a car? ›

The most basic element of component subwoofer installation is a snap. Mount your component subwoofer to an appropriate enclosure by connecting the leads to the terminal cup, and using mounting screws. It shouldn't take more than a few minutes. You'll then run the wiring to a nearby amplifier.

Are subwoofers in cars worth it? ›

When you move the load responsibility of low frequencies to a subwoofer, your whole car sound system will improve, being more balanced and having better sound clarity. Your musical listening experience will be improved in terms of clarity, and you'll hear the difference.

What all do I need to buy to put subs in my car? ›

You'll need a subwoofer, an amplifier, a wiring kit, a screwdriver, wire stripper, and crimping tool. Check that everything is compatible with your car's make and model.

Will replacing factory speakers make a difference? ›

A: You'll find that replacing your factory speakers can make a noticeable difference. Music sounds crisper, more dynamic, and closer to the way it was recorded and better than it would with a worn-out or low-quality speaker. Speaker replacement is also the single most cost-effective car stereo upgrade you can perform.

How to hook up a subwoofer to a car? ›

Ensure that you have an amplifier power rating that will not damage the subwoofer. Connect the RCA cables from the stereo or converter to the amplifier. Then, connect the speaker wires from the amplifier to the subwoofer. Lastly, recheck all the connections and make sure they are closed and mated correctly.

Can I connect subwoofer directly to amplifier? ›

Locate the plug on your amplifier that is labeled Sub Out, LFE (low frequency effects) Out or Line Out [source: KEF]. This is the terminal used to connect the subwoofer to the amplifier. Connect the cable that was included with the subwoofer to the amplifier's terminal.

Do you need an aftermarket radio for subwoofers? ›

Not that big a difference. So now you know – it's definitely possible to install a subwoofer and amplifier to your factory system, and still have it sounding good. If you'd like to know more about how to get a killer system set-up in your car without swapping your stereo, give us a call at 510-527-9888.

Can you hook up a subwoofer to a stereo amp without sub out? ›

To connect a subwoofer to an amplifier without a dedicated subwoofer out, the most effective method is to utilize a "Y" splitter cable.

Can a stereo receiver power a subwoofer? ›

Yes, if you're using a powerer subwoofer (that has a built-in amp). For passive subwoofer (without a built-in amp), if its impedance matches with your car receiver, then the receiver can power the passive subwoofer.

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