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Subwoofer wiring diagrams

How to hook up your subs for powerful bass

In this article, we'll help you find the best way to connect your subs to your amp. We begin with some basic – and important – subwoofer and amplifier terms. But if you want, you can skip straight to the wiring diagrams.

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There are many ways to wire subwoofers and amplifiers together. The ideal setup is when subs and amps match their impedance and power capabilities to optimize performance.

Power with care

The diagrams show wiring configurations for amplifiers and subwoofers that have already been matched for power capabilities. You should never connect subs to an amp that could give them more power than their total watts RMS power ratings. Doing so could damage the subs or the amp. See How to match subs and amps for further guidance.

Here's an example diagram for connecting two 4-ohm DVC subs to a mono-channel amplifier:

2 DVC-4

Wiring terms you need to know

The diagrams are below, but first let's explain a few important terms.


A single voice coil sub with two wiring terminal posts, one marked positive and the other marked negative.


A dual voice coil sub with four wiring terminal posts, two positive terminals and two negative terminals. This gives you more options for wiring the sub in different situations.


The impedance load, or resistance against the amplifier's output signal, of a subwoofer coil. Subwoofer voice coils usually come in 2-ohm, 4-ohm, or 8-ohm impedances. The value is often found printed on the magnet, if you're unsure of what you have.

Series wiring and parallel wiring

These terms refer to two ways of routing the speaker wires to properly manage the overall impedance load. Whether you need to use a series wiring configuration, parallel wiring, or a mix of both, our diagrams will show you exactly the best way to wire your speakers, without using confusing technical terms.

When you wire dual voice coils and multiple subs together, the resulting total impedance is not always simple to figure out or practical to use. In the example diagram above, the voice coils of each sub are wired together in series, while the two subs themselves are wired together in parallel.

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Amplifier output

An amplifier will put out more power through a low-impedance sub than it will through a high-impedance sub. But a lower impedance also means more stress on the amp. Some amplifiers (marked “low-imp” in the links below) can even drive a 1-ohm load safely, and achieve maximum output. Refer to your amp manufacturer or owner's manual to determine whether or not yours can handle a low-impedance load.

Bridged mode

Bridging an amp combines two amplifier channels into one, to get more power. The disadvantage of bridging is that bridged channels can't drive impedance loads as low as they can when unbridged. The proper way to bridge the amp is usually indicated at the amp's speaker wire terminals. For more information, read our How to bridge an amplifier article.

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All the wires depicted in the Subwoofer Wiring Diagrams are speaker wires. For wiring subwoofers, we recommend using wires of 12- to 16-gauge in size.

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Woman installing a car amp

Find the right wiring diagram

Now, let's get those subs hooked up! All of our wiring diagrams are listed below. Select the diagram for the number and type of subs you have. Depending on your gear, there might be more than one way to safely wire the subs.

A note about multi-channel amplifiers

5-channel amplifiers are a popular way to get "full system" power in one box — four channels to drive your four speakers, plus a fifth, higher-powered channel for your subwoofer. 6- and 8-channel amps are similar and offer even more flexibility. When it comes to connecting subwoofers to these amps, keep it simple:

  • If you're connecting your sub(s) to the subwoofer channel, treat it like a mono-channel amplifier.
  • If you're bridging two channels of your amp, simply treat it as a bridged 4-channel amp.

Start building your bass system today

Now that you've seen how to wire subwoofers and amplifiers together, you can knowledgeably shop Crutchfield's extensive selection of subwoofers and amplifiers. We also carry amp wiring kits, speaker wire, RCA cables, capacitors, and much more.

Contact us by phone, chat, or email and an Advisor will help you get what you need. If you want to learn more about amplifier systems, check out our Amplifier Installation Guide.

  • Chris

    Posted on 3/24/2023

    I have a monoblock amp with 2 outputs and a dvc sub, should I wire one set of +/- wires to each terminal resulting in 4 wires going from my amp to my sub one wire for each terminal on the amp and sub Side note. I wasn't paying enough attention when I bought this amp and missed that it put out 800w rms at 1 ohm and this sub needs 800w at 2 ohms, this amp is rated for 500w rms at 2ohms so I was wondering if this will have any detrimental effects on my system and if there is anything I can do to mitigate that until I can get a proper amp.

    Commenter image

    Buck Pomerantz from Crutchfield

    on 3/24/2023

    Chris, Without knowing precisely what amp and sub you're referring to, we can't help you with advice. If you want a question answered about a system, you must identify the gear by brand names and model numbers so we can get the right information to you.
  • Gowri from Chennai

    Posted on 3/18/2023

    For 350rms subwoofer.can we install 500rms amplifier (which will get damaged sooner)

    Commenter image

    Buck Pomerantz from Crutchfield

    on 3/20/2023

    Gown, Since 500 is larger than 350, that amplifier will most likely damage that subwoofer.
  • Jack Erwin

    Posted on 3/17/2023

    Hi, I'm looking at running 4 skar 8" subwoofers using the 4 DVC 4 ohm, 2 channel, 2x4 diagram shown here. I was wondering how to figure out how much power I would need to run these. The subs hold 350 watts RMS. How much power would each channel require to get all 4 subs to 350 rms?

    Commenter image

    Buck Pomerantz from Crutchfield

    on 3/20/2023

    Jack, In order for a 2-channel amplifier to supply four subwoofers with 350 watts RMS each, it'd need to be able to put out 700 watts RMS at 4-ohms per channel.
  • Jose

    Posted on 3/15/2023

    Does it matter what "bridge wire" i use. positive or negative?

    Commenter image

    Buck Pomerantz from Crutchfield

    on 3/15/2023

    Jose, Some wires are labelled "bridged wire" only to differentiate them from strictly positive (red) or negative (black) wires. It actually doesn't matter what color speaker wire you use for those positive-to-negative terminal connections.
  • Alex C from Ontario, ca

    Posted on 3/11/2023

    Im still confused after seeing all the wiring options. I have one 12" Alpine Type R. It can withstand 500w RMS and 1500 peak @ 4ohms. Its a single 4ohm DVC sub. I just ordered a Taramps bass 1200 monoblock which is supposed to deliver 650w rms @ 4ohm. How should my sub be wired to receive the 4ohm load from the amp? Series or parallel Thank you

    Commenter image

    Buck Pomerantz from Crutchfield

    on 3/13/2023

    Alex, A single DVC 4-ohm sub can only be wired as a 2-ohm load, which that amplifier will probably blow up, or an 8-ohm load (voice coils wired in series), which is the only safe way to wire that gear together.
  • PMiller from kahukui

    Posted on 2/20/2023

    I have a sub box with 2 separate speaker inputs. I have a mono amp with one set of speakers outputs. Can I safely wire both subs to the same output ?

    Commenter image

    Buck Pomerantz from Crutchfield

    on 2/20/2023

    PMiller, Without knowing precisely what amp and subs you're referring to, we can't help you with advice. If you want a question answered about a system, you must identify the gear by brand names and model numbers so we can get the right information to you.
  • Eric from Munith

    Posted on 2/17/2023

    Picked up 2 12" Pioneer TS-A300D4 4-ohm DVC subs with 500W RMS n 1500W Peak. Got a KAC-9105D amp. What's gonna be the optimal way to wire these? Manual says RMS 500W per channel @ 4-ohms, amp appears to have 2 channels. No mention of a bridge mode in the manual, not sure if this is an option. I may have missed it, but did not see a wiring diagram for this up top. Also have a Quantum Audio QB1000D that I cannot locate a manual for online anywhere that I could use, tho I think the Kenwood is a better amp (Class D vs Class A/B). Opinions welcome on that. Thanks in advance

    Commenter image

    Buck Pomerantz from Crutchfield

    on 2/17/2023

    Eric, The only safe way to wire that gear together is like this diagram. Your mono, 1-channel amp has 2 sets of speaker output terminals, wired together inside the amp, for convenience, so if you hook a speaker to each terminal it would result in the two speakers being wired in parallel, cutting the total impedance in half. For your set-up, that's exactly what you can do: wire each sub's coils together in series, creating an 8-ohm load, and then wire one sub to each set of terminals, reducing the total load to 4-ohms. It's electrically the same as in the diagram.
  • Unknown

    Posted on 2/14/2023

    Can I wire 4 Rockford fosgate p2d4 subs to a skar audio rp-150.4ab amplifier?

    Commenter image

    Buck Pomerantz from Crutchfield

    on 2/15/2023

    Unknown, You can safely wire those four DVC 4-ohm subs to that amp like this diagram.
  • Rob hixson from Dayton ohio

    Posted on 1/27/2023

    Two p3 10s dvc 4 ohm Rockford fosgate need to know best way to wire subs to 5 channel Rockford fosgate p1000

    Commenter image

    Buck Pomerantz from Crutchfield

    on 1/27/2023

    Rob, If (and only if) you're referring to the Rockford Fosgate Punch P1000-1bd, it's a mono 1-channel amp, and the best way to wire those subs to it is like this diagram.
  • joseph domiano from Wading River

    Posted on 1/20/2023

    im looking to wire 2 8 inch kicker comp c 4 ohm DVC subs in parallel. they would be wired at 4 ohms for the amp. now my question is, if i use an amp that outputs 150 watts at 4 ohms would each sub get 150 watts or would they each get 75? the amp can also output 350 watts at 1 ohm. what configuration would i be better off wiring the subs at to get the most power output to the subs with their peak being 200 rms? should i wire in parallel at 1 or 4 ohms? thank you in advance

    Commenter image

    Buck Pomerantz from Crutchfield

    on 1/23/2023

    Joseph, Those two DVC 4-ohm subs rated for 200 watts RMS each wired together as a 4-ohm load to an amplifier that can send them a total of 150 watts RMS will each receive 75 watts RMS. If your amplifier can do it, the subs wired together as a 1-ohm load will each get 175 watts RMS, optimizing the amp's output power application.

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