Getting that sweet bass sound really isn’t so hard if you know the basics. The right low pass frequency can make a big difference!
In this article, I’ll share what you need to know along with some other helpful info, too!
Contents
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A has a specific range of it’s best suited for – pretty much only low-end bass in most cases (this is true for both a home or ). That’s because the cone size is large enough to produce bass waves well unlike smaller speakers.
Likewise, a (in most cases) is poor at producing in music like vocals or treble due to its limited . We want to prevent that from happening so choosing the correct is important.
Home stereo settings
Table #1: Recommended home subwoofer low pass frequencies
| Woofer type | Cutoff frequency |
|---|---|
| Powered or non-powered (amp) subwoofer | 70 to 80Hz |
| Midbass woofers in a 3-way system | 250Hz |
| Woofers in a 2-way speaker | 1.5 to 3.5Khz, depending on the design |
A good rule of thumb for a home stereo subwoofer () setting is 70 to 80Hz. Once you’ve set it, adjust slowly and listen for what sounds the best to you.
Ideally you’ll have only pure, clean bass from the and hear music or movie without any gaps in the (no areas where bass seems lacking). In some cases you may need to increase the gain on a powered if the level seems too low.
A home receiver’s effect () output may have some different modes that depend on the mode. Some have a fixed (especially for surround mode) or may offer an adjustable for stereo music playback.
Should I use a for my main speakers?
It’s not always necessary but sometimes can help prevent having too much bass. Not all main speakers for a home receiver or home theater receiver can produce bass well. For those that can, it’s possible you’ll end up with “boomy” bass when both your and the main speakers are producing it.
In that case, if your or receiver has a () option, 60 to 80Hz is often a good choice. It’s always worth trying out to see how it sounds to you as there are so many thin
gs that affect the , including the room, carpet vs hardwood floors, and much more.
Car stereo settings
Table #2: Recommended car subwoofer low pass frequencies
| Woofer type | Cutoff frequency |
|---|---|
| Powered or amp-driven subwoofers | 70 to 80Hz |
| Midbass woofers in a 3-way system | 250Hz |
| Woofers/midbass in a 2-way speaker | 1.5 to 3.5Khz, depending on the design and speakers |
The same rules also hold true more or less for a as well. 70 to 80Hz is usually a great choice. As small speakers (especially those installed in a car or truck dashboard or doors) are usually pretty bad for , a high pass crossover can help reduce distortion and provide better .
For example, in addition to the low- for your subs, using a high- set to about 56-60Hz for the front speakers will prevent them from distorting heavily especially at higher power levels. This also means you can drive them harder for more volume.
Understanding options
A is the steepness of a crossover’s filtering ability. In other words, it’s how effective it is at reducing frequencies beyond the point.
Slopes, just like the , are categorized in terms of decibels (dB) per . A negative sign (-) is used to represent an , or reduction, of the .
In the world, we commonly measure a range of frequencies between two points using an . An is a doubling or halving of a number. (100Hz, 200Hz, 400Hz, etc.) When we refer to a crossover having a cutoff of -6dB per , we mean it will continue to reduce the output by an additional 6dB for every doubling of the previous . Example: -6dB @ 1KHz, -12dB @ 2KHz, -18dB @ 4KHz, -24dB @ 8KHz, -32dB @ 16KHz, up to 20KHz.
What should I use for a enclosure?
While you might think “the higher, the better” would be right, things get more complicated once you get past 2nd or 3rd order designs.
Generally speaking, a -12dB is often the best choice and works well for most speaker systems. A usually sounds very good with a 12dB or 18dB slope.
One reason is that it has a relatively affordable and uncomplicated design but still gives a good cutoff ability. This works great both for single speakers or 2-way speakers.
The most commonly used slopes are:
- -6dB
- -12dB
- -18dB
You’ll find that -12dB per octave crossover slopes are the most common for consumer electronics you buy.
Do I need a ?
What does a do?
A is a with a very low – often around 30 or 20Hz for example. The idea is to prevent bass waves that we can’t hear from being sent to a box to prevent wasting power for no reason.
The for human hearing varies from person to person, but most people can hear somewhere down to around 30Hz or a bit below. 20Hz waves can be felt but not heard, so it’s pretty pointless to draw a lot of power for something you can’t even hear.
Not only this but most is mixed with the most enjoyable bass being around 40 to 50Hz or so for “thump” in music and rumbling or action in movies meaning 20 to 30Hz isn’t needed.
Do I need to use one?
Generally speaking no you don’t and in fact, in most cases, you won’t hear a difference. However, it certainly won’t hurt anything, and for some such as vintage record players where low- rumble is present, it can be useful.
What is a control? Do I need to use it?
A control is an optional feature in some home stereos, car stereos, and amplifiers to increase the signal output at a certain point in the . It’s very common on today’s car products but is also sometimes a feature in home receivers.
It’s usually one of a few types:
- An on/off switch with a fixed boost level
- A selectable switch (ex.: 0dB, 6dB, 9dB boost)
- A rotary dial with adjustable output level, usually up to 12dB
It doesn’t boost all bass frequencies. Instead, it’s centered at a point called the center . This is usually a fixed point at about 45 or 50Hz, right where the most “boomy” or “thumping” bass can be heard in music.
Are they helpful?
It’s more of a fun thing to have especially if you’d like some extra punch in your favorite music or if you feel your system is lacking in bass performance. Generally speaking, it’s not necessary with a well-performing , but it can be nice to have. It’s worth giving it a try to see what you think.
Car amplifiers sometimes include a plug-in remote bass knob that lets you adjust it from the drivers seat – very handy for when the music you love starts playing!
Why do some amplifiers have control and some do not?
Including a boost feature is entirely up to the manufacturer and marketing – some customer types would never use it (example: audiophiles for home stereo ) while others like car customers may love having the option.
More great articles to see
Check out these other great articles related to subwoofers:
- See my guide on how to connect a subwoofer to a receiver without a subwoofer output.
- Find out more details about what a crossover frequency is and what a crossover does.
- Here’s how to use a car subwoofer with a home stereo.
- Right here you’ll find more recommended crossover frequencies for car and home audio systems.
I had to read it 4 times! Lol!! I’m a real dummy when it comes to this but I’m learning tho. Thanks 4 the info!!!
Hey there I’m glad you found it helpful. :)
Thanks a lot for your explanation. After years I understand the matter much better.
Thanks for dropping by, Krish. :)