Bazooka Subwoofer Project

This subwoofer was designed and built to fill the need for non commercial low frequencies in the music of Bil Bless (aka SOTEG, Skeetaz, The Disciple Grin).

Basic Data:
Weight: ~70kg
Design: Double Ported Vented Enclosure
Speaker: Vibe Black Air I+ 450 W / 1600 W peak dia. 38cm
Material: 2,2 cm MDF, silencing foam 2 cm
Finishing: not ready yet
Tunning Frequency: 25 HZ
Response Frequency: 21,93 Hz -3db
SPL Max: 92 db
Thermal power handling: 300W 30hz sinus

Category:

Science & Technology

Tags:

• Subwoofer
• Design
• Vibe
• Black
• Air
• SOTEG
• Disciple
• Grin
• Bil
• Bless
• Skeetaz
• DYI

[blankpaper66]

Dumb question, but how do you actually "Tune" a port to work best at a certain Hz? Always wondered haha

[AudX]

@blankpaper66 You've got 2 options

a) use your ears. put the enclosure outside (silent garden), stand couple of meters away (where the bass is strongest), play sine waves sweep, use db meter to see if the response is flat. If it is not - alter port diameter by putting eg. wooden stick inside untill it flattens out. Once you reach flat, punchy sound you are there. Change the port diameter by equivalent of added square cm of wood sticks. You cannot do it in your room! open space or anechoic chamb

[AudX]

ber are only options

2) take the volimeter, play sweeps look at the highest voltage points at speaker terminals. these are resonance freqiencies. compare this with your software model (winisd probably). You will notice it differs from theory. Change port diameters untill you get resonance at projected frequency. Fix the port diameter permanently. you are done. This can be done in your room.

First option is much better though...

[skylinelad09]

port area for that size box is way to small !!!!!!!

[AudX]

@skylinelad09 no way dude! it's actually quite big. 2 ports each 4x50cm. That comes to 400 cm2 and that equals one square port of 20x20 cm. Thats biiiig. And finally there are virually no port noise. So it's good!

[mrPEPELDO]

wie ktoś jak się ta muza nazywa ? a co do pudła to nic specjalnego , stara szafka z głośnikiem :-) 0 weny twórczej !

[AudX]

@mrPEPELDO Bil Bless - Squarnch. Tak - szfka jak szafka - pierwszy projekt, więc bez zbędnej fantazji. teraz rzeźbie ciekawsze rzeczy. skończe to pokaże.

[ExpertOfSound]

@AudX

Hey, in my opinion I think a Dayton Audio Classic 18" 4 ohm woofer would work better for what you did here. It has a FS of exactly 25Hz, and it hits low frequencies like crazy. only 125$ too 300watts RMS

[blankpaper66]

@AudX Thanks for the large response man! :D

[blankpaper66]

@vietstyle888 Yep, i know it's a old comment buy there's no reason not too, but as the uploader mentioned, most of them aren't meant for home use. Many manufacturers actually make ones for cars and for home use, but SQ (Sound Quality) brands like JL Audio or even ascendant audio have several SQ subs which can be used inside. JL are #1 for SQ, yet they still slam, they also have a home range, while others like AA can be used inside, but aren't really meant for it.

[s1mm3g]

and just hope that your neiburs like your music

[P90xFitnessExpert]

Keep it Lound and Strong...