Subwoofer 30cm

Types of Subwoofer 30cm

A subwoofer 30cm is a 12-inch subwoofer that can play low bass sounds in a car or home audio system. It comes in different types, which include:

• 1. Sealed subwoofer

  A sealed subwoofer 30cm has a completely airtight enclosure. This traps air inside, making it hard for sound waves to escape. As a result, the subwoofer produces deep and accurate bass sounds. However, it requires a lot of power to produce loud sounds.

• 2. Ported subwoofer

  A ported subwoofer has a hole or port in its enclosure. This allows sound waves to escape and interact with the outside air. As a result, the subwoofer produces louder bass sounds, especially at higher frequencies. However, the sound may not be as deep and accurate as a sealed subwoofer.

• 3. Bandpass subwoofer

  A bandpass subwoofer 30cm is housed in a chamber with two openings. One opening allows sound waves from the subwoofer's cone to enter the enclosure. The other opening lets sound waves pass through and exit the enclosure. This design allows the bandpass subwoofer to produce loud sounds at specific frequencies. For instance, it can be tuned to emphasize the bass notes of a musical instrument. However, the subwoofer may not produce sounds outside its tuned frequency range.

• 4. Iso-baric subwoofer

  An iso-baric subwoofer consists of two subwoofers placed together in a chamber. One of the subwoofers is inverted, meaning its cone is facing downward. Both subwoofers move together as one. The iso-baric subwoofer can produce deep bass sounds despite having a smaller enclosure. This is because the inverted subwoofer acts like a piston, pushing air to assist the other subwoofer's cone. The downside is that the iso-baric subwoofer requires twice the amount of power to operate.

• 5. Free-air subwoofer

  A free-air subwoofer is designed to be installed directly onto a car's rear deck. It uses the car's cabin space as its enclosure. This allows the subwoofer to produce loud bass sounds without needing a separate enclosure. However, the sound quality may not be as good as other subwoofer types.

Specifications and Maintenance of Subwoofer 30cm

Here are some of the specifications for the 30 cm subwoofer.

• Power Handling

  The power handling for the 30 cm subwoofer is 300 watts RMS and 600 watts peak power. This means that it can handle up to 300 watts of continuous power from an amplifier and can handle short bursts of up to 600 watts.

• Frequency Response

  The frequency response for the 30 cm subwoofer is 20 Hz to 200 Hz. This means that it can produce sounds as low as 20 Hz, which is deep bass, and up to 200 Hz, which is a higher bass frequency.

• Impedance

  Impedance is the resistance that is offered to the flow of an electric current. The impedance of the 30 cm subwoofer is 2 ohms, 4 ohms, or 8 ohms. This means that it has different options for impedance, and users can select based on their audio system requirements.

• Speaker Sensitivity

  The sensitivity rating for the 30 cm subwoofer is 85 dB to 90 dB. This means that the subwoofer can produce sound levels up to 85 dB to 90 dB with a power level of 1 watt and a sound level of 1 meter.

• Voice Coil

  The 30-cm subwoofer has a dual voice coil (DVC) design. Each coil has a diameter of 1.5 inches (38 mm) and is made from aluminum. The voice coils are wound with copper wire, and they are also cooled with a ventilated pole piece.

• Surround and Suspension

  The surround for the 30 cm subwoofer is made from foam, and it has a diameter of 8 cm (20 cm). The surround is attached to the cone with glue, and it provides a flexible connection between the cone and the frame. The suspension for the 30 cm subwoofer is also made from foam. It is used to keep the cone centered within the frame and allows it to move back and forth freely.

• Enclosure Type

  The enclosure type for the 30 cm subwoofer is a ported enclosure. The enclosure has a volume of 75 liters, and the port diameter is 4 inches (10 cm). The port length is 12 inches (30 cm). This means that the enclosure is designed to improve the efficiency and output of the subwoofer.

Here are some of the maintenance tips for the subwoofer.

• Cleaning: It is important to regularly clean the subwoofer to remove dust and debris that can affect its performance. A soft cloth or a soft brush can be used for cleaning.
• Check the connections: Loose or damaged connections can cause distortion or low output from the subwoofer. Regularly check the wiring and connections to ensure they are secure.
• Do not over power: Avoid using an amplifier that provides more power than the subwoofer can handle. This can cause damage to the speaker over time.
• Avoid moisture: Keep the subwoofer away from areas with high humidity or exposure to moisture. Moisture can damage the electrical components and affect the sound quality.
• Inspect the surround: The surround is a crucial component of the subwoofer that helps produce bass sounds. Regularly check the surround for any signs of wear or damage, such as cracks or tears.
• Use the right enclosure: Ensure that the subwoofer is installed in an enclosure that is designed for its specifications. An improper enclosure can affect the performance and lifespan of the subwoofer.

How to Choose Subwoofer 30cm

Subwoofer buyers should consider several factors, including the power, sound quality, and installation requirements when shopping for a 30 cm subwoofer. Here's a detailed breakdown.

Power is a crucial factor when buying a 30 cm subwoofer. The subwoofer's power rating determines how loud and deep it can play. Buyers should go for subwoofers with higher power ratings if they want loud and deep bass. The power rating is given in watts. Subwoofers with 300-watt power ratings are ideal for smaller spaces. A 30-cm subwoofer with a 700-watt power rating is suitable for outdoor use or larger environments.

Buyers should consider the sound quality of a 30-cm subwoofer. The sound quality is determined by the frequency range and sensitivity rating. Subwoofers with lower frequency ranges can produce deeper bass sounds. Sensitivity ratings indicate how loud the subwoofer can play. A higher sensitivity rating means the subwoofer can play louder.

Another important consideration is the installation requirements of the 30 cm subwoofer. Buyers should ensure that the subwoofer can be easily installed in their space. Some subwoofers come with mounting hardware, which makes installation easy and convenient. Additionally, buyers should check the size and weight of the subwoofer. Smaller and lighter subwoofers are easier to install.

Power, sound quality, and installation requirements are key factors when choosing a 30-cm subwoofer. By considering these factors, buyers can find a subwoofer that meets their specific needs.

How to DIY and Replace Subwoofer 30cm

Replacing an 8-inch subwoofer can be a straightforward DIY task, provided one has the right tools and follows the proper steps. Here’s a general guide on how to replace a 30 cm subwoofer:

Tools and materials needed:

• New 30 cm subwoofer (ensure it’s compatible with the existing system)
• Screwdriver (Phillips or flathead, depending on the screws used)
• Wire stripper (if necessary)
• Electrical tape or heat shrink tubing (for wire connections)
• Torx screwdriver (if required for the specific car model)
• Socket wrench (for some car models)
• Trim removal tool (for some car models)

Steps to replace a 30 cm subwoofer:

• Disconnect the battery: Start by disconnecting the negative terminal of the battery to avoid any electrical short circuits or damage while replacing the subwoofer.
• Remove the subwoofer grill: Use the appropriate screwdriver or trim removal tool to take out the grill covering the subwoofer. This will give access to the subwoofer.
• Unscrew the subwoofer: Depending on the car model, the subwoofer may be held in place with screws or bolts. Use a screwdriver or socket wrench to loosen and remove these fasteners.
• Disconnect the subwoofer: Carefully lift the subwoofer out of its mounting location. Be cautious as it may still be attached to the enclosure with adhesive. Disconnect the subwoofer from the audio system’s wiring.
• Transfer the mounting hardware: If the new subwoofer doesn’t come with mounting hardware, transfer the fasteners, such as screws or washers, from the old subwoofer to the new one.
• Connect the new subwoofer: Connect the new subwoofer to the audio system’s wiring. Ensure the connections are secure and follow the correct polarity (positive to positive, negative to negative).
• Secure the subwoofer: Carefully place the new subwoofer into its mounting location. Secure it with the screws or bolts you removed earlier.
• Replace the subwoofer grill: Once the subwoofer is installed, reattach the grill or cover you removed in step 2. Ensure it fits snugly and securely.
• Reconnect the battery: Reconnect the negative terminal of the battery to complete the installation. Ensure the connection is clean and corrosion-free.

Q and A

Q1: What is a subwoofer, and why is it used in speakers?

A1: A subwoofer is a speaker designed to reproduce low-frequency sounds, typically in the range of 20 to 200 Hz. These frequencies correspond to the deep bass notes in music or the rumbling effects in movies. Subwoofers enhance audio systems by providing a fuller sound, ensuring that listeners can experience the depth and richness of music and soundtracks. Without a subwoofer, audio playback may lack the low-end punch, making the overall experience less immersive.

Q2: What is the difference between a 30cm subwoofer and a 12-inch subwoofer?

A2: A 30 cm subwoofer and a 12-inch subwoofer refer to the same size speaker, as 12 inches is approximately 30.48 cm. Subwoofers are often labeled using their diameter in inches and centimeters to cater to different audiences' preferences. Therefore, there is no difference between the two in terms of physical size and performance characteristics.

Q3: Can a 30 cm subwoofer be powered by a regular home audio receiver?

A3: It depends on the subwoofer and the audio receiver in question. Some subwoofers are powered by internal amplifiers and connect to the receiver through a dedicated sub-out or line-level output. These are often called ""active subwoofers."" On the other hand, unpowered subwoofers require an external amplifier to function. In this case, a home audio receiver without an external amplifier will not be able to power the subwoofer.

Q4: Is a 30 cm subwoofer good for small car audio systems?

A4: Yes, a 30 cm subwoofer can be suitable for small car audio systems. While larger subwoofers can produce deeper bass, they may not fit well in a small car. A 30 cm subwoofer can provide a significant upgrade in bass performance compared to smaller models. Additionally, 30 cm subwoofers take up less space and are more affordable, making them the ideal choice for small car audio systems.

Q5: What is the ideal enclosure size for a 30 cm subwoofer?

A5: The ideal case size for a 30 cm subwoofer depends on the specific model and its parameters, as well as the desired sound characteristics. However, a general rule of thumb is to build a case that meets the manufacturer's recommendations to get the best performance. In general, a vented enclosure provides a more efficient bass response, while a sealed enclosure produces a tighter and more accurate bass.