Which Line of 30, 40, and 50 Bass Electric Subwoofer Should You Choose?

When installing a karaoke system or home entertainment system, choosing the right 30, 40 or 50 bass powered subwoofer directly affects the power, bass depth and overall sound quality of the entire system. Each bass size has its own acoustic characteristics, suitable for different room areas and purposes, so not all big bass means good sound. 

This paragraph, Phuc Truong Audio will analyze in detail the differences between each type of subwoofer, advantages and disadvantages, the ability to combine with full speakers and suggest the most popular subwoofer models today so you can choose the right model for your space.

What are 30, 40, 50 powered subwoofers?

30, 40, 50 powered subwoofers are active subwoofers designed to reproduce powerful, deep and accurate low-frequency bass, serving home karaoke systems, business singing rooms, movie rooms or small stage sound. 

The biggest difference between an electric sub and a subwoofer is that it has a built-in power amplifier, helping the device operate independently, without the need for a separate amplifier, reducing matching errors, reducing noise, easy to adjust and suitable for many spaces from small to large.

The “30 – 40 – 50” classification corresponds to speaker sizes of 30 cm (12 inches), 40 cm (15 inches), 50 cm (18 inches) — the larger the size, the deeper the bass range, the greater the sound pressure and the stronger the dispersion.

• Sub 30: deep sound, fast speed, little echo; suitable for small rooms 12-20m².
• Sub 40: deeper bass, stronger force; suitable for medium rooms 20-35m².
• Sub 50: extremely powerful, "shocking" the room; suitable for VIP karaoke rooms, rooms of 30-50m² or mini bar-beer clubs.

Bass is the element that creates "flattering ears", vocal thickness and strong feeling of background music, so electric subwoofer is an indispensable component of every standard sound system.

Top 30 powered subwoofer lines trusted today

According to the synthesis of Phuc Truong AudioThe 5 30-watt subwoofer models below are selected based on their actual performance, durability, sound quality, suitability for small to medium sized rooms, and popularity in the Vietnamese karaoke market. This is an easy-to-assemble segment, low risk, and suitable for beginners.

30 Cavs KL12 Electric Bass Subwoofer

CAVS KL12 is considered a "delicious - compact - effective" 30cm sub bass, suitable for rooms under 20m². This sub model has a fast-speed bass driver, concentrated hitting force, suitable for both vibrant and light music. 

The KL12's Class D amplifier circuit is optimized for karaoke, allowing the sub to maintain stable power after many hours of operation without overheating. The thick, reinforced MDF speaker cabinet at the back helps prevent the bass from being distorted or distorted when the volume is turned up high. The KL12 is suitable for family karaoke systems or small businesses that need a "solid - neat - clean" sub.

CAVS SA812 30W Electric Subwoofer

CAVS SA812 is a more powerful version of KL12, giving a thicker, deeper, and more powerful bass. This is a sub model suitable for rooms of 18-25m², especially when combined with full bass speakers 25 or 30 such as CAVS LS710, JD-12 or KTreasure TD12. SA812 has low distortion, deep 40-80Hz range without rumbling, suitable for professional karaoke. The advantage of SA812 is strong capacity, cool operation, bass that is easy to "match" with the room, no need for complicated adjustments.

Yamaha Bass 30cm DXS12mkII electric subwoofer

Yamaha DXS12mkII has a clear, clean, well-controlled sound quality, suitable for those who like subtle bass instead of too much power. Yamaha's advanced DSP technology helps optimize phase, handle noise, and limit distortion in deep bass. 

Bass goes down below 45Hz but still maintains good control, no tail. This model is suitable for 15-20m² space, high-end family karaoke or movie rooms that need precise bass.

Paramax MK-SUB30 Electric Subwoofer

Paramax MK-SUB30 is a sub line with a warm - round - thick tendency, very suitable for Vietnamese karaoke music taste. The powerful amplifier circuit, good response speed in the 50-90Hz range helps the background music to be solid, thick and easy to sing. 

MK-SUB30 pairs well with Paramax P2000, D2000 speakers or 25 full bass karaoke speakers. Beautiful design, effective vibration-canceling speaker cabinet, bass sound has little resonance when placed close to the wall.

Wharfedale bass 30 SW-10 electric subwoofer

Wharfedale SW-10 represents British sound quality: smooth - deep - well controlled, suitable for those who like emotional bass, not too heavy. 

The speaker and port are carefully tuned, helping the sub reproduce low frequencies accurately even at low volumes. The SW-10 is suitable for small rooms that need clean bass that does not "overwhelm" the vocals when singing.

Top 40 powered subwoofer lines trusted today

The 40 bass electric subwoofer is a "delicious - strong - versatile" choice because it combines both depth and power, suitable for many karaoke configurations from home to business.

Paramax A40 40cm electric bass subwoofer

Paramax A40 has a deep, powerful, and wide bass, suitable for spaces of 20-28m². The 40cm speaker combined with a high-performance Class D amplifier helps the A40 play many genres of music, especially remix, vinahouse, and EDM. The speaker cabinet has good vibration cancellation, so the bass is not dull or reverberating. This is the "national" electric subwoofer in the mid-range segment.

Paramax D40 karaoke electric subwoofer

Paramax D40 is an upgraded version that focuses on depth and power, providing bass that goes down to below 40Hz clearly. DSP helps reduce frequency resonance and optimizes phase, creating round bass that is well compressed when turned up loud. D40 is suitable for rooms of 22-35m² or business rooms that want thick and strong bass.

CAVS bass 40 SC715 electric subwoofer

CAVS SC715 stands out for its strength and "stuffing" of the bass range. The sub produces a tight sound, without tearing at high volume, suitable for business karaoke rooms. SC715 combines very well with LS715/LS710 speakers or 30 full-range bass speakers. According to Phuc Truong Audio's assessment, this is a stable choice for rooms of 20-35m².

Yamaha DXS15mkII 40 Bass Electric Subwoofer

DXS15mkII is a professional sub model with deep - powerful - clean bass, accompanied by powerful DSP to help the sub operate stably in large rooms. The bass range goes very deep, suitable for VIP karaoke rooms or mini events. The bass is precise, with little distortion, very suitable for those who love balanced sound quality.

40 Subwoofer 1500 Array

Subwoofer 1500 Array is designed for high volume, suitable for large karaoke rooms or mini array speaker configurations. The bass is strong, widespread, and maintains its power even when turned up loud for a long time. This is the sub model for spaces that need "full - powerful - even" bass.

Top 50 powered subwoofer lines trusted today

The 50 (50cm – 18″) electric bass sub is the “boss” for large rooms or spaces that require extremely strong sound pressure. This is the sub line that produces the deepest, strongest and widest bass.

JBL EON 618S 50 bass electric subwoofer

JBL EON 618S provides deep, compact, and powerful bass, suitable for VIP karaoke rooms, mini stages, or events. JBL DSP optimizes frequencies to help the sub go deep while still maintaining a clean sound. The impact is strong but well controlled, without rumbling. This is a 50 bass electric sub model that is widely used in VIP rooms.

Alto TS218S 5-inch electric subwoofer

Alto TS218S is a powered subwoofer specialized for powerful music with high SPL and extremely powerful punch. Deep bass range, good compression, suitable for mini bars - beer clubs - karaoke rooms 30-45m². The hard box design helps the subwoofer maintain stability even when operating at high intensity.

Yamaha DXS18 50W Electric Subwoofer

The DXS18 is an 18″ powered subwoofer in Yamaha’s high-end segment, with a focus on clean bass, powerful power, and good control. Powerful DSP allows the subwoofer to operate smoothly, limiting distortion when turned up high. This is a model trusted by many luxury karaoke rooms, movie rooms, and events.

How to choose the right 30, 40, 50 powered subwoofer for your needs?

According to Phuc Truong Audio's experience, choosing the right subwoofer depends on the room area, full speaker configuration, purpose of use and bass taste. Small rooms of 12-20m² should choose 30 bass for compact, non-echoing bass. Rooms of 20-30m² should prioritize 40 bass because of its suitable spread and impact force.

Large rooms of 30m² or more or business karaoke need powerful bass so choose bass 50 to achieve optimal sound pressure. In addition, you must consider the integrated amplifier capacity, crossover frequency, and phase adjustment ability so that the sub blends perfectly with the full speaker, avoiding frequency overlap or vocal overlap.

Frequently asked questions about 30, 40, 50 electric sub

Does a powered subwoofer need an additional power amplifier?

No. Subwoofer is built in. ampli The internal Class D or Class AB should operate independently. The user only needs to supply the signal from digital echo, mix, karaoke player or receiver into the sub is running. The built-in amplifier helps limit clipping, power loss or sub burning due to incorrect pairing. This is the reason why electric sub is suitable for beginners or family systems.

Why is sub 30 sometimes better than sub 40 in a small room?

Because small rooms activate the mode at 40–60Hz very strongly. Bass 40 has a lot of energy, easily causing bass boom if not soundproofed. Bass 30 activates less mode, gives a clean, clear sound, easy to sing. This explains why many 15–18m² family rooms using bass 30 sound better.

To plan a sound system installation for a small room, see the article: Design and construction of karaoke system for small entertainment room

Is the subwoofer suitable to be placed under the table or close to the sofa?

No. Set under Placing the sub close to an obstacle will change the air release characteristics, causing distortion and lack of power. Many people place the sub close to the sofa and think the sub is weak, but in fact the “port is blocked”, unable to release air. The best way is to place the sub 20-40cm from the wall and not cover the speaker face.

Contact now Phuc Truong Audio For advice on choosing the right 30-40-50 subwoofer for your room, on-site installation and the best price in HCM today!