Joey Ford
Agent
- Joined
- Jun 26, 2002
- Messages
- 25
I've enclosed a pair of Earthquake 8" drivers that I used in my car a couple of years ago. I called the company to get the specs. on the speaker and they directed me to this link http://www.earthquakesound.com/br8.htm
The box that I built is a pentagon that stands 24" tall. The drivers are mounted vertically on the far corner. The front and left side are 12" wide each -- if you can visualize this. It is constructed of 3/4" MDF with one internal diagonal brace.
The internal area is 0.99 CuFt. including the area the two speakers take up.
I've ported the box at the top with a 3" X 13.50" pipe. Why did I do this? Well, I used this Vent Calculator http://tools.autoaudio.com/ventcalc/ However, I left the frequency default at 35Hz.
The specs indicate that the speaker's Resonance Frequency is 41.33Hz. My speaker is not the identical one listed on the above URL. Mine has a 48oz. magnet, 2 inch voice coil, and is rated at 180 watts.
I haven't received my new crossover yet, so I tested the box at full range using my pioneer receiver. There appears to be alot of box noise from within the port. When I cover the port, some of the noise is reduced.
Did I attempt to tune these drivers too low? Is there another port dimension that I should try?
I appreciate any and all responses.
Thanks
Joey
The box that I built is a pentagon that stands 24" tall. The drivers are mounted vertically on the far corner. The front and left side are 12" wide each -- if you can visualize this. It is constructed of 3/4" MDF with one internal diagonal brace.
The internal area is 0.99 CuFt. including the area the two speakers take up.
I've ported the box at the top with a 3" X 13.50" pipe. Why did I do this? Well, I used this Vent Calculator http://tools.autoaudio.com/ventcalc/ However, I left the frequency default at 35Hz.
The specs indicate that the speaker's Resonance Frequency is 41.33Hz. My speaker is not the identical one listed on the above URL. Mine has a 48oz. magnet, 2 inch voice coil, and is rated at 180 watts.
I haven't received my new crossover yet, so I tested the box at full range using my pioneer receiver. There appears to be alot of box noise from within the port. When I cover the port, some of the noise is reduced.
Did I attempt to tune these drivers too low? Is there another port dimension that I should try?
I appreciate any and all responses.
Thanks
Joey