ORION Car Audio
Originally posted by pro_onSNOW:
yea someone list off some good retail sites
yea someone list off some good retail sites
shyguysean13@Yahoo.ca
50 Watt CAFz'r
Joined: May 2004
Posts: 467
Originally posted by pro_onSNOW:
Hey, hows it going im new around here.
I was loking to do a mad spl system for my truck
(extended cab nissan pickup) and was wondering if anyone has had experice with orion. it looks like it might pound put i was wondering if anyone has any experiense with it.
Hey, hows it going im new around here.
I was loking to do a mad spl system for my truck
(extended cab nissan pickup) and was wondering if anyone has had experice with orion. it looks like it might pound put i was wondering if anyone has any experiense with it.
Thread Starter
0 Watt CAFz'r
Joined: Nov 2004
Posts: 16
okay im definatly confused about this, how does makeing the port size different tune the box? how do i know what the port size should be and what the port size will turn out to produce for a tune?
is there any physics related to box design and how hard the sub will hit? is there a formula i could get that would help me determin the correct port size for maximum spl from a set of dual drivers?
is there any physics related to box design and how hard the sub will hit? is there a formula i could get that would help me determin the correct port size for maximum spl from a set of dual drivers?
port determines how much air and how fast it moves out of the box, so thats your tuning.
what the port size will be will depend on the size of the box and what not u want your box to be tuned to and peak at (not the same)
and yes there is a formula, u can just search for a "sub box port calculator" on the internet and im sure u will find it. there are diff formulas for diff types of pots.
what the port size will be will depend on the size of the box and what not u want your box to be tuned to and peak at (not the same)
and yes there is a formula, u can just search for a "sub box port calculator" on the internet and im sure u will find it. there are diff formulas for diff types of pots.
Frequency = .158(A(1.84*10^8)/(V(L+.823(A)^0.5))^0.5
A=port area (sq.in)
L=port length(in)
V=box volume after displacement (cu.in)
This is the standard non-derivitave form of the formula, although it has been argued that the A^.5 term should be closer to A^.3 due to increased impedence in a smaller port, and the leading constant should be lower to account for attenuation. For most purposes though, this formula will do you you well.
Basically, pick the port area, volume, and frequency then rearrange to solve for port length. There are calculators out there, but I have found some to be almost 10 Hz off in tuning.
A=port area (sq.in)
L=port length(in)
V=box volume after displacement (cu.in)
This is the standard non-derivitave form of the formula, although it has been argued that the A^.5 term should be closer to A^.3 due to increased impedence in a smaller port, and the leading constant should be lower to account for attenuation. For most purposes though, this formula will do you you well.
Basically, pick the port area, volume, and frequency then rearrange to solve for port length. There are calculators out there, but I have found some to be almost 10 Hz off in tuning.
Thread
Thread Starter
Forum
Replies
Last Post
