RCF 905 AS II Reviews – Best Subwoofer To Consider

You’re looking for the best subwoofer to buy, but you don’t know which one is right for you. The RCF 905 AS II is a great choice because it’s affordable and offers excellent sound quality.

This RCF 905 AS II has a power handling of 500 watts RMS and 1000 watts peak power, so it can handle any music or movie soundtrack with ease.

This subwoofer also comes with a remote control that lets you adjust the volume from across the room. If you want more bass in your life without spending too much money, this might be just what you need!

Here is our review of RCF 905 AS II. Check out!

Things To Consider When Buying RCF 905 AS II



The first thing to consider when choosing a subwoofer is design. Specifically, the type of enclosure. There are 3 types of enclosures, sealed, ported, and bandpass. The two most common subwoofers are sealed and ported.

Sealed enclosures have an air-tight seal on all sides so all of the air insides are compressed when the woofer fires. This causes a more accurate sound but it doesn’t give the woofer much room to move. This is why they usually have higher power handling because they are very rigid.

The second type of enclosure, ported, has a “port” on one side of it to allow air in and out of it instead of being compressed. It creates more movement in the woofer which results in louder low frequencies but can cause inaccurate sounds.

Bandpass enclosures are the least popular type of enclosure because it combines both ported and sealed together to create what is referred to as infinite baffle. All three types of enclosures have their advantages and disadvantages so it really just depends on what you prefer hearing.

Power Handling

Another very important thing to consider when buying a subwoofer is power handling. This spec determines how much power the woofer can handle before it breaks or malfunctions. Power handling of a speaker, like most specs of a speaker, is measured in watts.

In order to get the most out of your subwoofer, it’s recommended that you have anywhere from 1-2x the wattage as the high end of the power handling. For example, if you have a 500w sub you will want to make sure you have at least a 1000w, or more, amp.

This is to make sure the power going into the woofer is strong enough for it to handle and keep up with a clean sound. If you don’t have enough wattage going to your subwoofer you could damage the voice coil in it which will make it not work anymore.



There’s not too much to say about the size that hasn’t already been said. You should, of course, measure your subwoofer to see how big it is before you buy anything. If you try to cram a 12″ sub into an enclosure for an 8″ sub you could end up with some problems like poor sound or maybe even not fitting at all.

This wouldn’t happen with every sub, but it’s definitely possible. Not all subwoofers are created equal, some are bigger than others, even if they have the same specs. If you don’t know how big your sub might be make sure to measure before buying anything. It will save you time and money in the long run!


Impedance, or ohms, is another important spec that you should consider before buying a subwoofer. It tells you how much power the speaker needs to operate properly. There are two different kinds of resistance measured in ohms, impedance, and resistance.

The wattage mentioned above is usually not enough for you to know what kind of ohm your subwoofer needs unless you get the exact number from the manufacturer. Even then it’s hard to say if they’re lying or not without testing yourself.

It’s a good idea to have an amp with the same ohm as your subwoofer so there isn’t a lot of resistance on it. This is important because if you have too much resistance, besides just being obnoxious for no reason, it can damage the amplifier since amps usually have heat protection that turns them off when they get too hot.


Frequency Response

This is another spec that tells you what kind of range the subwoofer can handle. It’s usually measured in Hz and is how low or high something can go, literally. When you see frequency response on a subwoofer it’s telling you the highest frequency the speaker goes up to. This number will sound very high if your hearing isn’t very good. Like anything, this number is a range and not a specific number.

Usually, the lower this number is, the better it will sound but that’s not always true. There are cheaper subwoofers than others that don’t have the best frequency response but sound much better than their price would imply because of other factors like power handling and size.

It’s important to know how low your subwoofer can go before you get one because if the lowest it can go is not very low, like under 50Hz, then your system won’t sound good regardless of what other factors are involved. For home theater systems where you want more than just bass for watching movies or playing videos.

RCF 905 AS II Review

RCF SUB 905-AS II Powered Subwoofer
  • Stereo XLR input, Stereo XLR signal output
  • Birch tour grade cabinet

RCF 905 AS II subwoofer is an active subwoofer with an internal power amplifier. The enclosure is made of ABS material, so it is tough, durable, and light (about 18 lbs).

The front-firing bass port reduces the boundary coupling and keeps the low-frequency range smooth even at high volumes. Rotatable M10 rigging eyes are available on both sides for suspending above or below or even for floor monitor use.

RCF 905 AS II is designed to be used with active speakers. The main idea behind the product is to provide a complete, powerful sound reinforcement system for bands, DJs, karaoke vocalists, and many others who play live on stage.

It contains an amplifier that has 400 watts of power with 125 dB max SPL. The frequency response is 30 Hz to 150 Hz ± 3dB. Low pass filter controls are available for adjusting the subwoofer cut-off depending on the full-range speaker system used with it.

Who Is RCF 905 AS II For?


RCF 905 AS II is for musicians, DJs, karaoke vocalists, and any other person who wants the complete sound reinforcement system to play live on stage.

RCF 905 AS II is not only for the musicians but also for those who play music as well as those who work as sound engineers. RCF has been able to make a high-quality product that is durable and strong.

They have been able to maintain a lightweight because of the material they used which was ABS for their enclosure. This means that you’ll be able to use it without feeling like you’re carrying around something too heavy and it’s also going to last a long time.

If you’re looking for a complete sound reinforcement system, then RCF 905 AS II might be right for you. With its 400 watts internal amplifier and 125 dB max SPL, it can provide customers with what they need when playing live.

Pros Of RCF 905 AS II

Portable, lightweight, and durable. The frequency response is wide enough for both performing on stage and enjoying music at home. The power amplifier has a very high max SPL.

Easy to use – RCF 905 AS II has only high-level inputs so you don’t need any other cables or converters. Handles up to 400 watts of power which is more than enough for small to medium-sized venues.

Cons Of RCF 905 AS II

There are no auxiliary outputs, so you cannot use RCF 905 AS II with additional subwoofers. The upper-frequency range is limited to 150 Hz so it’s not good for music genres that rely heavily on high frequencies. The amplifier power could be lower – it is good for small to medium-sized venues, but not for large ones.

Features & Benefits



RCF 905 AS II subwoofer has a great design. The enclosure is made of 19 mm MDF wood. The front plate with the RCF logo looks great and this subwoofer really stands out.

You can even open the top or front to get access to the driver without having to remove any screws! On one side there are two handles for easy transportation. This makes it easy to take from one place to another for example from home to a party at your friend’s house.

Power Amplifier

The amplifier of this speaker is a mono amplifier with a maximum power of 1500 W (700W + 700W). This has already been designed very well because you do not want the sound going down while the bass still goes higher. The frequency response is in the range of 25 Hz to 150 Hz with a sensitivity of 98 dB.

Low Frequency

RCF 905 AS II features an 8″ front-firing low-frequency driver that has been designed for optimum performance and linearity even at high SPLs. This speaker is very similar to our former top product, the RCF ART 715A MK II. The differences are that this speaker is not so big, has an 8-inch driver and the design is different.

RCF 905 AS II also features a horn with controlled dispersion for improved sound projection. This prevents early reflections in the room which gives you great audio even when you are standing at the side of the speaker.


Remote Level Control

This speaker features a wireless remote control with our RCF i-Mix function which enables you to connect your smartphone and start streaming music from your favorite music services such as Spotify, Apple Music, or any other music service that can be found in the app store.

You can also play MP3 songs from your smartphone or tablet using the integrated 3.5mm AUX input. There is also a USB port to charge your mobile devices when needed.

RCF 905 AS II features four preset buttons, volume +/- and an on/off button which enables you to set up all your preferences without taking your phone out of your pocket!

The RCF 905 AS II subwoofer is designed for both passive and active applications, which means that it can be used as a complete system together with some other speakers on the market.

High-Quality Stereo Sound

The RCF 905 AS II has been designed to provide accurate sound reproduction, low distortion levels at high SPLs, and wide bandwidth for best compatibility with popular subwoofers.


RCF 905 AS II features high-quality materials that ensure endurance and stability. All components are made of stainless steel and aluminum, rubber parts are made of special material to withstand heavy use.

RCF 905 AS II is part of RCF’s AS series which means that it has an advanced design with superior performance when compared to competitive products in the market.


Sound Quality

RCF 905 AS II delivers high-performance audio with high SPL. The subwoofer is optimized for producing great sound pressure levels with low distortion. The controlled directivity enables the subwoofer to maintain an extremely smooth frequency response even at high SPL.

RCF 905 AS II features a high-power front-firing 8″ woofer and an advanced 1″ compression driver. These have been designed for maximum efficiency and low distortion.

The advanced rigging system with ergonomic handles contributes to easy handling and transportation. Combining it with a top subwoofer such as our T series or Sub5, you’ll get the best sound quality on the market.

Speaker Dimensions

RCF 905 AS II subwoofer has a size of 30,5 cm x 39,5 cm x 41 cm. This means that it is smaller than our former model RCF 718 MK II which makes it easier to transport. Net weight is only 25 kg / 55 lbs. The design makes this speaker easy to move around even if you are on your own.


RCF 905 AS II is perfect for its portability. Handles on each side will make it easy for you to take the speaker where ever you go and the handle at the top makes it possible to lift more than 100 kg / 220 lbs.

Transportation wheel

Transportation wheel is included in the package making it easier to transport your speaker from A to B. Easy transportation means that you can easily bring your speaker to a party, club, or concert.

RCF 905 AS II also has wheels on the bottom which makes it easy for you to place the speaker where ever you want.


Input & Outputs

RCF 905 AS II has multiple inputs and outputs which makes it easy if you have multiple devices connected at the same time. Connect your smartphone, computer, or any other audio device to the speaker.

RCA input and XLR input makes it easy to connect to DJ equipment such as mixers and CD players. There’s also a microphone input which is a 1/4″ jack. RCF 905 AS II has an output for connecting another speaker if you want more volume. You can connect to another speaker using an XLR cable.


The new RCF 905 AS II subwoofer is equipped with an extremely powerful 2000W amplifier which makes the speaker suitable for PTAC applications where large volumes are required to cover bigger areas. The special design allows the soundwaves to reach even the lowest frequencies which means that you can enjoy a clear and realistic bass sound in all types of venues.


RCF 905 AS II has a three-year warranty and is made of parts and components that will ensure you many years of listening pleasure.


Klipsch R-120SW Subwoofer

Klipsch R-120SW Subwoofer, Black
  • 12" high excursion spun-copper Imp woofer
  • 29 hertz – 120 hertz +/- 3 dB

Klipsch R-120SW Subwoofer is a stronger alternative to the RCF 905 AS II. The R-120SW can hit a slightly lower bass note while still maintaining a clean and powerful sound.

The amplifier is housed in a die-cast aluminum chassis for superior heat dissipation, which means you can play it loud and long without breaking a sweat. Klipsch R-120SW Subwoofer is a stronger alternative to the RCF 905 has a longer warranty, offers deeper bass and is available for a very similar price as of today.

This is the only alternative with a longer warranty than RCF 905 AS II. Klipsch R-120SW Subwoofer has an output power of 300 watts, while Sony’s product has 110 Watts.

Klipsch R-120SW Subwoofer is a stronger alternative to RCF 905 AS II. It has the same power, while still offering deeper bass and is available at a similar price as of today.

The active subwoofer system incorporates three high-performance 12″ drivers in a full-sized, vented enclosure with 400 watts of continuous power. The system includes a Class D amplifier and an adjustable crossover.

It also comes with remote control and it can be used either horizontally or vertically depending on your preferences. Klipsch R-120SW Subwoofer is better in all aspects, making it a better choice if you’re looking for a powerful subwoofer that delivers deep bass.

Sony SACS9 Active Subwoofer

Sony SACS9 10-Inch Active Subwoofer,Black
  • Active 10” subwoofer perfect to provide that extra punch for your home theater or music listening setup
  • Amplify your movie, music, and gaming experience with a speaker that provides full frequency audio with a three-way coaxial, four-driver speaker system

Sony SACS9 Active Subwoofer is a powered subwoofer with a built-in 100 W amplifier, designed for SACD and DVD-A playback. It has a front-firing 8″ cone driver and a down-firing reflex port which provides a smooth response over a wide range of frequencies from 31 Hz to 125 Hz.

The SACS9 also offers many other features that are ideal for use with most digital sources. The front panel input connector is equipped with a priority phono preamp which allows an external source, such as a turntable, to take priority over other inputs if selected. This way you can enjoy listening to your favorite vinyl records without having to disconnect or switch off the unit when using digital sources.

Input and output connections are gold plated to provide the highest quality signal transfer. A detachable IEC power cord is included for added convenience, allowing you to use your own preferred power cord if desired. A 3-year warranty comes with this unit as well.

BESTISAN Powered Subwoofer

BESTISAN Powered Subwoofer, 6.5’’ Home Audio Subwoofer, Deep Bass Response Subwoofers in Compact Design, Easy Setup with Home Theater Systems, TV, Speakers, RCA, Black
  • Powered Compact Subwoofer-Integrated High Efficiency Power Amplifier, This Sub Is Your Answer To More Power In A Compact Design.Overall Frequency Response 40- 250 Hz, Gain And 60 - 250 Hz Crossover Control Knobs
  • 6.5 Inch Side Firing Woofer - Long Throw Subwoofer With High Rigidity Pva Treated Cone, Bottom Slotted Port, Bass Reflex Cabinet Design In Compact Size, With Added Internal Bracing And Black Oak Finish

BESTISAN Powered Subwoofer is something you will not want to miss when looking for the best-powered subwoofer. This is one of the most popular Powered Subwoofers available on Amazon and comes with a low price tag.

The BESTISAN Powered Subwoofer, which has been known to add significant value to your living room or home theater experience, offers you rich low-end tones and a whole lot of bass, which is why it ranks as one of the best out there.

One of the most important factors to consider when purchasing a Powered Subwoofer is its size. However, BESTISAN Powered Subwoofer eliminates this worry for you because it can fit practically anywhere – even if your space isn’t all that large.

Another important factor to consider is the number of speakers or subwoofers you will want with your audio system, and the BESTISAN Powered Subwoofer makes it easy for you by offering a single wired speaker for connection purposes.

Another great feature about the BESTISAN Powered Subwoofer is its ability to double up as a satellite speaker, which is bound to make your entertainment experience even more enjoyable.

Lastly, the BESTISAN Powered Subwoofer features an intuitive design that makes it easy for you to enjoy great sound quality from anywhere in the room. Not only does this add convenience to your home audio system, but it also enhances your overall living.



What is the power handling for the RCF 905 AS II subwoofer?

The RCF 905 AS II can be used in any live sound application and typically handles a load of a full band, with up to 250 watts continuous input. The power handling is 250 Watts Continuous input only. It’s not designed for home-usage.

Does RCF 905 AS II subwoofer come ready to install?

RCF 905 AS II comes ready to install. It doesn’t require a professional installation and it is designed for home-usage. It includes an easy-to-install bracket and all the hardware required for installation.

What is the power input for the RCF 905 AS II subwoofer?

The RCF 905 AS II can be used in any live sound application and typically handles a load of a full band, with up to 250 watts continuous input. The power handling is 250 Watts Continuous input only. It’s not designed for home-usage.

It has an amplifier built into the subwoofer itself that requires no external power supply, so it saves on space because there aren’t any additional cables or amplifiers needed.


RCF 905 AS II subwoofer is a high-quality product that will provide you with the sound clarity and power you need to get your music off of speakers. The RCF 905 AS II has an excellent frequency response, which means it can produce sounds between 20 Hz and 250 Hz accurately.

It also provides great low-end output for those bass lovers out there! If these features are important to you in a speaker system, then this should be one of your top choices when shopping around. So, what are you waiting for?

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