Professional measurement and production of subwoofer casing--Yalong Audio Factory

Making audio enclosures (speaker enclosures) is a highly specialized job that involves multidisciplinary knowledge such as acoustics, materials science, structural mechanics, and electronic engineering. An excellent speaker enclosure design can significantly affect sound quality performance, including low-frequency response, tone purity, resonance control, and sound field positioning. The following are the core points of professional audio enclosure design:

1. Selection of box material

Medium density fiberboard (MDF) is an industry standard that avoids the use of particleboard (which is prone to resonance) or thin materials due to its uniform density and low cost

2. Box structure design

Design points:

Inverter tuning: The length/diameter needs to match the TS parameters of the unit (such as using WinISD simulation).

Internal support: Braces are used to reduce panel vibration, especially for large enclosures.

Geometry optimization:

Avoid parallel surfaces: reduce standing waves (such as trapezoids, irregular inner walls).

Rounded/curved design: reduces edge diffraction (such as KEF Reference series).

3. Acoustic debugging and process details

(1) Key process requirements

Sealing: CNC precision cutting and bonding are used at the joint to avoid air leakage.

Unit installation: Rebate design ensures seamless fit between the speaker and the panel.

Internal wiring: Use oxygen free copper wire to fix the wire and avoid vibration and noise.

(2) Testing and Optimization

Impedance curve test: Verify the compatibility between the enclosure and the unit.

Frequency response measurement: Analyze peak and valley defects through microphone and REW software.

Listening tuning: subjectively adjust the amount of sound-absorbing cotton or the length of the inverted tube during listening.

The core of a professional audio enclosure is "controlling vibration" and "precise tuning". From material selection to structural design, every step requires a combination of scientific calculations (such as Thiele/Small parameters) and rigorous craftsmanship. For DIY enthusiasts, it is recommended to start with MDF sealed boxes and gradually learn how to use measurement tools such as Dayton Audio's testing kit.