I have a question for those of you who know about building ported speaker cabinets. I want to use this Celestion Coaxial speaker for a full-range guitar cabinet intended for amp modellers and acoustic guitars:
Celestion F12-X200 - 12in Ceramic Full Range Speaker
Here is the DIY cabinet that Celestion recommends for it:
BUILD THIS: F12-X200 1x12 Cabinet Design - Celestion
Since I have a couple of cabinets that are close to this size, I emailed "Dr. Decibal" at Celestion and asked him the following:
"The internal dimensions recommended by Celestion are approx. 21" x 15.5" x 13.5". I have a cabinet with an interior volume of 18" x 14" x 13.5". It says in your promotional material that this speaker will work well in a variety of enclosures. If I use the cabinet I have and add the recommended port, can I expect good results?"
To which he answered:
"I don't see why not. It might be worth finding some cab design software online to help you calculate a sensible port size. This is just one design. You can get great results simply from putting the speaker in a standard cabinet, or design your own with the parameters provided on the product webpage. You can use whatever material you like."
I have no experience with speaker cabinet design software. Can someone recommend a proper port size for the two empty cabinets I currently have? (Dimensions listed below.) Which cabinet is a better choice? I am capable of making the new baffle with a port as well as closing off the back of the cabinet I choose, but I don't know how big to make the ports. I would prefer the cypress cabinet because it is very light. If the depth on the cypress cabinet is too great, I could cut it to make it shallower.
Cabinet 1 (The lightweight preferred choice):
1/2" Dovetailed Cypress (similar in density to Pine)
Interior Dimensions, length/height/depth: 18" x 14" x 13.5"
Cabinet 2 (My second choice, quite a bit heavier):
3/4" Birch Plywood
Interior Dimensions, length/height/depth: 20.5" x 13.5" x 9"
I would appreciate any advice re. this, thank you very much!
Celestion F12-X200 - 12in Ceramic Full Range Speaker
Here is the DIY cabinet that Celestion recommends for it:
BUILD THIS: F12-X200 1x12 Cabinet Design - Celestion
Since I have a couple of cabinets that are close to this size, I emailed "Dr. Decibal" at Celestion and asked him the following:
"The internal dimensions recommended by Celestion are approx. 21" x 15.5" x 13.5". I have a cabinet with an interior volume of 18" x 14" x 13.5". It says in your promotional material that this speaker will work well in a variety of enclosures. If I use the cabinet I have and add the recommended port, can I expect good results?"
To which he answered:
"I don't see why not. It might be worth finding some cab design software online to help you calculate a sensible port size. This is just one design. You can get great results simply from putting the speaker in a standard cabinet, or design your own with the parameters provided on the product webpage. You can use whatever material you like."
I have no experience with speaker cabinet design software. Can someone recommend a proper port size for the two empty cabinets I currently have? (Dimensions listed below.) Which cabinet is a better choice? I am capable of making the new baffle with a port as well as closing off the back of the cabinet I choose, but I don't know how big to make the ports. I would prefer the cypress cabinet because it is very light. If the depth on the cypress cabinet is too great, I could cut it to make it shallower.
Cabinet 1 (The lightweight preferred choice):
1/2" Dovetailed Cypress (similar in density to Pine)
Interior Dimensions, length/height/depth: 18" x 14" x 13.5"
Cabinet 2 (My second choice, quite a bit heavier):
3/4" Birch Plywood
Interior Dimensions, length/height/depth: 20.5" x 13.5" x 9"
I would appreciate any advice re. this, thank you very much!
So, your preferred cabinet volume is 2 cu ft compared to the Celestion's 2.5 cu ft - in round figures.
This represents a reduction in volume of 20%.
Your port can remain the same diameter, but it will have to be longer.
If you don't want to get into cabinet design software, I would estimate it at around 50% longer.
You could experiment by slotting in incrementally longer plastic tubes until you get the most pleasing bass response.
Over to the cabinet modellers! 😉
This represents a reduction in volume of 20%.
Your port can remain the same diameter, but it will have to be longer.
If you don't want to get into cabinet design software, I would estimate it at around 50% longer.
You could experiment by slotting in incrementally longer plastic tubes until you get the most pleasing bass response.
Over to the cabinet modellers! 😉