DIY Audio build using Aliexpress speaker box

Aliexpress prefab box with European speakers

The idea of this project is to use an already made Aliexpress speaker box, with all the accessories and finish applied and find some compatible drivers for the available cutouts. If you are not coming from YouTube, you should probably go an watch the video first.

Parts list

For the parts list we have box treatment, speaker drivers themselves and the crossover components (Affiliate paid links):

• Beyma 6B30/P bass driver (2 pcs) – [Sound Imports] [US Speaker]
• Peerless by Tymphany XT25TG30-04 Tweeter (2 pcs) – [Sound Imports] [Parts Express]
• Sound damping pads (2 pcs) – [Sound Imports] [Parts Express]
• Vibration damping pads (4 pcs) – [Sound Imports]  [Parts Express]
• 4.7 uF Capacitor (2 pcs) – [Sound Imports] [Parts Express]
• 15 uF Capacitor (2 pcs) – [Sound Imports] [Parts Express]
• 0.47 mH Inductor (2 pcs) – [Sound Imports] [Parts Express]
• 1.8 mH Inductor (2 pcs) – [Sound Imports] [Parts Express]
• 3.9 Ohm 10W resistor (2 pcs) – [Sound Imports] [Parts Express]

Crossover

The crossover is a simple 2-way, 2nd order crossover with an extra resistor to pad the tweeter. The crossover point is at 2.2 Khz. Here is the schematic.

Final result

Here is the frequency response of this box.

Because the box is tuned so low, at 35 Hz, the response starts to roll off at 80 Hz. However, the roll-off is at a shallow slope, comparing to the response of a sealed box. Since this is a bookshelf speaker, a tuning frequency of 50 Hz would of been much more appropriate, but since this box is already made there is nothing we can do. If the bass reflex port would have been a plastic circular one, we could of made it shorter. However, in this case we have to accepts the 35 Hz tuning frequency.

If you want to see more info, like off axis response, might as well watch the YouTube video.