How To Connect A Subwoofer To An Old Amplifier?

If you want to upgrade your home theater system. You simply mean that you have decided to get a new subwoofer, but the problem is that your old amplifier does not have a connection for it.

Well, in that case, you are in the right place.

We will show you how to connect a subwoofer to an old amplifier so you can enjoy all of those low-end frequencies!

How To Connect An Old Amplifier To Your Subwoofer?

Let’s begin by taking off the back panel of your amp and finding where each wire goes into it.

Now we need to find out which wire is positive and which one is negative on both ends.

Once we know this information we can go ahead and strip some insulation off of our speaker wires so they are exposed at both ends as well.

We will then take our positive speaker wire from our subwoofer and attach it with the positive terminal on our amp using either solder or twist ties depending on what type of connector they use (if any).

Then repeat this process with the negative terminals making sure everything stays nice and tight throughout this whole process.

Finally, plug in your power cord into an outlet nearby before turning up your volume knob until you hear sound coming from your speakers! 

A Comprehensive Guide To Connecting A Subwoofer To An Old Amp:

Let’s get started with things you will need for connecting subs to old amplifiers.

- An old amplifier without a connection for the subwoofer

- Screwdriver set (to take out your current connections)

- All the necessary cables and wires to make it work properly. Generally, you only need two sets of RCA cables and a speaker wire.

One end plugs into your new subwoofer while the other is plugged in at the input side to one of those channels on the back part of your receiver/amplifier that has red or black markings next to it indicating “left” or “right”.

Above this channel should be written its frequency range such as 40Hz - 200Hz which means it can handle any frequencies within that spectrum.

This information ensures proper compatibility between both components so doesn’t worry about it too much.

Connecting the subwoofer is as simple as plugging in its cables. Now, you’re ready to start working on the amp and receiver.

Take out its cover using a screwdriver then look for the speaker terminals usually having red or black markings indicating “positive” and “negative” plus something else that indicates which wire goes where in your speakers.

Most of them indicate it with pictures so try connecting one wire at a time until you get sound coming through all three channels (left, right, & center).

If done correctly, you should be hearing sounds from all ends now!

This is just one way to go about this process but there are other ways as well such as buying an Amplifier with Subwoofer Connection or just getting a new receiver that is compatible with your speakers.

Functions Of A Subwoofer:

A subwoofer is an electronic device that reproduces low-frequency sounds. It’s typically used in sound systems to reinforce bass frequencies, though it can also be used to transmit signals for public address systems.

Subwoofers are usually built into home theater receivers or set up as part of a surround sound system.

They may also be connected to an amplifier and played through speakers in your living room.

Some types of subwoofers have multiple drivers designed to reproduce different frequencies, which gives you better control over how the music sounds when you’re listening at home.

The more drivers there are, the greater range of sound will come out from each speaker - so if you like to listen to bass-heavy music, you’ll want a subwoofer with high power.

Benefits Of A subwoofer:

Following are the major benefits of a subwoofer.

What Are The Functions Of An Amplifier?

An amplifier is an electronic device that increases (or “amplifies”) the strength of a signal in order to boost its level or output it into larger speakers.

Amplifiers can be found inside many different kinds of equipment, including radios and sound systems for your home entertainment system.

If you’re looking at buying new speakers for your living room or surround sound set up, look out for amps built in - this means it will work straight out of the box without requiring any extra hookups!

When used with other components such as turntables they amplify low voltage signals so they can be heard through speakers.

If you’re looking to pick up a new amplifier for your sound system, check out different range of hi-fi amplifiers and home theater amps!

The top brands right now in the market are Bose, Denon, Marantz and Yamaha, so find something that’s right for your needs.

Amplifier vs Subwoofer: Key Differences

There are some notable differences between an amplifier and a subwoofer - but how do they work together?

Let’s take a look at three ways in which these two devices differ from one another:


Amplifiers typically generate more power than subwoofers can handle (some amps will even struggle with lower frequencies). It is therefore necessary to choose an amplifier with a higher wattage than your subwoofer.

A good rule of thumb is to choose an amp that’s at least twice as strong as the woofer you wish to use, but it can be beneficial to get one that has more power - this will give you greater control over how bass frequencies are balanced in relation to mids and treble sounds.


Subwoofers tend to cost less than amplifiers because they don’t require any additional parts or components that come built into amps for generating sound signals.

For example, most home theater receivers have amplifiers built-in so there isn’t really much need for external wires — just plug everything in!


Amplifiers tend to be larger because they house multiple components, whereas subwoofers are only one unit that connects directly into your speakers or sound system.

When it comes to set up equipment in your living room or home theater entertainment area, amplifiers will take up more space on the floor where a subwoofer can easily slot underneath a TV stand or behind an armchair.

Final Thoughts:

To summarize, if you’re looking to improve the sound quality of your old amplifier, look no further than adding a subwoofer.

Subwoofers are designed to reproduce low frequencies and will work with almost any type or make of amplifier - so if you want better bass for your music, this is an essential purchase!

Steven Paul
Hi, I'm Steven Paul! I am dedicated to helping people learn more about subwoofers. My age is 49-year-old and passionate for helping others by doing detailed research, I really like working on because it gives me the opportunity to use my knowledge of research on Musical Guides. I have been researching about musical instruments for over 20 years and there is nothing that I love more than helping beginners get into the hobby of home theater audio. My goal with this site is to provide an unbiased resource where beginner's can come and find all the information they need to make educated decisions when shopping for their first subwoofer system.