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Subwoofer Calculator

Subwoofer Calculator – Recommendations by Room Size [ Updated 2022]

Subwoofer Calculator

Subwoofer power output

The majority of the top 10 inch subwoofers on the market are active, which means they have their own internal amplifier as opposed to relying on an external one.

The internal amplifier that powers the speaker driver is the heart of your subwoofer.

When picking a subwoofer, it’s important to realise that power(ing), which is expressed in watts.

Subwoofer specifications typically include RMS and Peak power.

Peak may be disregarded. When the volume is turned all the way up, it measures the overall maximum power a subwoofer can generate. You won’t be doing it very often, I assure you, especially if you value your hearing.

Only take into account RMS wattage. Rarely is the word RMS used to refer to continuous watts; RMS stands for Root Mean Square. In essence, it gives you a general indication of how much power a subwoofer can generate when used for extended periods of time at a moderate volume.

For instance, take a look at the inexpensive Monoprice 9723, which has great sound and costs less than $130. Its 150 watts (RMS) are common for speakers in this price range and are more than enough for most users.

The subwoofer is more likely to be able to provide clear, distortion-free sounds at loud volumes the higher the wattage.

Undoubtedly, higher wattages will be more expensive. Generally speaking, the majority of people will be completely satisfied with wattage levels between 250 and 600 watts, which translates to powerful power generation at affordable prices.

Variable Frequency

The frequency of a sound influences how high or low it is. Understanding frequency is crucial for subwoofers, which use the frequency measurement unit of Hertz (Hz).

A subwoofer that can reach the lowest frequency is by definition a great subwoofer because bass notes have a low frequency.

The frequency range that makes your stomach grumble is between 20Hz and 10Hz, which is the range at which humans can hear and feel.

A submarine should aim to approach specific targets as closely as possible. While some very expensive subwoofers, like this SVS PB16-Ultra 1500 Watt, may go as low as 13Hz, the majority of today’s subwoofers can handle depths of 25Hz.

A subwoofer with a 25Hz frequency will do if bass isn’t your thing. A subwoofer with a 40Hz frequency will do if bass isn’t your thing. Remember that a lower frequency floor will cost more when purchasing a subwoofer.

The highest frequency your subwoofer can withstand should be considered while putting it up. The crossover is the point at which your subwoofer starts to play and your standard speakers stop.

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The ability to manually set the crossover on most A/V receivers nearly always results in a more powerful bass sound. This feature does exist, even though I haven’t seen it on many hi-fi amplifiers.


Explosiveness is the primary distinction when deciding on a larger or smaller subwoofer for your home. And it differs depending on the brand.

By switching from a 10-inch to a 12-inch subwoofer, you won’t necessarily experience a rise in explosiveness because some labels are more explosive than others.

Everything depends on how brands interpret the contours of their response curve. And that’s a matter of taste.

When the amplifier power (RMS watts in subwoofers) grows within a single brand, the explosiveness frequently rises as well.

A 15-inch shallow subwoofer is often less powerful than a 10-inch deep bass subwoofer. It actually has a big effect.

Are All These Subwoofers Really Necessary?

Dual (two) subwoofers are absolutely necessary for rooms larger than 2000 cubic feet.

On the basis of my own personal experience, I can only attest to that. That is, however, my personal experience.

Dual subwoofers can break up a standing wave in any size room. You’ll hear peaks and troughs, as well as loud and silent areas, if you simply have a single subwoofer.

It functions equally well in a small area as it does in a large one. You’ll experience those problems if you only have one subwoofer. Duals are crucial.

However, using a lot of subwoofers will make the room modes ineffective. There doesn’t seem to be a clear connection for subwoofer numbers that are reasonable.

There is no need to use more than four subwoofers when you take into account the additional cost of adding more. On the other hand, it was found that the LF factor declined as the number of subwoofers grew.

Four subwoofers are sufficient to get the best performance in any arrangement.

I was disappointed as soon as I put in a single subwoofer in my house. There was far too much diversity. Just too many areas are empty and noisy. It didn’t sound authentically bassy, which I like.

How Much Room Does a Subwoofer Need?

You’ll need more room around your subwoofer the bigger it is.

The volume area needed for a 12-inch subwoofer is 1.25 cubic feet. The recommended volume for an 8-inch subwoofer is 0.375 cubic feet, whereas the capacity for a 10-inch woofer is 0.625 cubic feet.

The sound will be softer and better suited to songs with less bass if you design a wider enclosure to allow more space inside.

A speaker’s lifespan would be shortened and sound quality would be severely limited by an enclosure that is smaller than what is advised.

Subs with larger drivers and more powerful amplifiers don’t need our walls for support.

High-quality subwoofers perform at their best when pulled back at least 8 to 12 inches from any wall.

Because they are closer to your front-channel loudspeakers, subwoofers also perform better in the front half of your listening space by reducing phase cancellation and time delays.

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Can a subwoofer ever be too large for a space?

You don’t have to keep to small subs just because your space is constrained.

Although I don’t think you need them, you can have the huge dudes if you so choose.

All that remains is to accommodate them and cope with boundary gain difficulties.

I finished the job. I have PB 4000s in a very constrained area. And it had a fantastic sound. I am knowledgeable about the subject. I won’t risk my safety on something like this.

In order to prevent your subs from having to work as hard, you could be obliged to go larger than is recommended if you are operating subs in a particularly vast location.

Your car shouldn’t be running at 9000 RPM all the time. Right? The similar idea underlies how subwoofers work. Your woofers shouldn’t be running continuously at full volume.

The need for a larger subwoofer may arise if your space is huge.

How does Subwoofer Room Gain function? What is it?

Room gain is a naturally occurring rise in deep Bass energy brought on by the size-dependent acoustics of the listening space.

A subwoofer may play lower frequencies and provide higher power compared to the rated output by getting room control.

Room gain happens in all sizes of rooms, but it is most obvious in cramped, smaller areas.

It has to deal with the biggest dimension of the room, which is typically its length or breadth.

The bass output levels can be greatly raised if the room’s longest dimension is less than 20 feet.

Why is 20 feet so unique? The length of low-frequency sound waves is the cause of this. The difficulty lies in the fact that room gain begins at a frequency whose wavelength is twice as long as the room.

Since the wavelength is 28 Hz, 20 feet multiplied by two is 40 feet. As a result, in a space with a 20-foot longest dimension, room gain begins to operate at 28 Hz and below.

Room gain starts earlier since many rooms’ longest dimensions are less than 20 feet.


Subwoofers in an Open versus. Closed Room

It’s crucial to think about your room’s layout and how it interacts with surrounding spaces before choosing a subwoofer for it.

The “listening area” is unimportant to subwoofer audio, but if the room doesn’t have a door to close it off, you’ll have to cope with the whole thing.

If you have a sealed or closed room, you must take into account the furniture and walls. Open entrances, hallways, adjacent dining rooms, and kitchens are just a few of the considerations you must make if you have an open-concept design. Essentially, any space that isn’t completely enclosed by a door.

A room that is open to other spaces may require the greater inherent capabilities, which typically means ported subs, even if the choice between sealed and ported subs depends more on the room size and performance requirements than on whether or not a room notion is closed.

Your specific listening preferences (e.g., how much bass you like, movies vs. music, master volumes) are less important when the subwoofer fits your room size.

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