as i mentioned in an earlier post i have 2 compvr 18's in a box where the chambers are 1.83cu.ft apiece the deminsions are 38Wx18Hx12L i want to vent them i just do not know what hertz they should be tuned at now take in to acount they are the 1999 series c18d's and i am purely using them for spl i dont need sq i need db's i am going to come up with a way to temp. seal them in between comps thanks for tha help
Replies (7)
swez on 07/24/2004 18:10:33
That enclosure size is very small for an 18" Comp VR. Their specs range recommendations for that sub are:
Ported: 4.0 - 6.0 cf per sub
3x18x20 for a 6 cf box
3x18x24 for a 5 cf box
Both of these are slotted ports and tuned to 40 Hz.
Sealed:
2.2 - 5.5 cf per sub for a compact sealed or street bass boxes
NOTE: http://www.kicker.com/images/manuals/03CompVRManual.pdf
Swez
PS These are specs right from Kicker's web site. If you deviate from these specs... better know what you are doing. This one is alot like trying to fit a hippo into a 1 gallon container.
Bigeazy4387 on 07/25/2004 01:21:11
no no they are c18d's[1999] recommended for 1.2 to 2.2cu.ft sealed enclosures i have my box built right i am going to vent them with 3"Hx18"Wx? i was wondering the hertz i should tune it for comp for comp
swez on 07/25/2004 05:15:08
If these subs are that old, best to write/call Kicker and ask them about what is recommended for these subs. If not covered by the current website, it's the only way to get the right information.
Swez
racerbizoehm on 07/25/2004 17:49:35
yeh hes talking about single voice coil model VR = DVC plain comp SVC, but I even seen that a single requires more than the dual for my 12 inch I have so anything under 2 for each sub is bad deal
cplkittle on 07/26/2004 00:13:29
Most recommended tuned frequencies are at or around the F3 This is the 3dB downpoint of the sub. The reason for this is to extend the dB 'shelf' as far as possible (3dB gain at tuned frequency @ the 3dB downpoint of the sub) The F3 is usually 3-5 Hz below the Fs (free air resonance) To get maximum SPL at a low frequency I recommend tuning at or slightly above the Fs.
Bigeazy4387 on 07/26/2004 20:51:52
alright thanks for tha input cplkittle i dont have the fs on my manual and kicker doesn't have it on its site i email kicker and will come back as i dont know my xmax and dont want to overthrow my woofers by doing this
swez on 07/27/2004 09:44:52
Good plan Stan! Ask the guys who made them.
Swez
Replies (7)
swez on 07/24/2004 18:10:33
That enclosure size is very small for an 18" Comp VR. Their specs range recommendations for that sub are:
Ported: 4.0 - 6.0 cf per sub
3x18x20 for a 6 cf box
3x18x24 for a 5 cf box
Both of these are slotted ports and tuned to 40 Hz.
Sealed:
2.2 - 5.5 cf per sub for a compact sealed or street bass boxes
NOTE: http://www.kicker.com/images/manuals/03CompVRManual.pdf
Swez
PS These are specs right from Kicker's web site. If you deviate from these specs... better know what you are doing. This one is alot like trying to fit a hippo into a 1 gallon container.
Bigeazy4387 on 07/25/2004 01:21:11
no no they are c18d's[1999] recommended for 1.2 to 2.2cu.ft sealed enclosures i have my box built right i am going to vent them with 3"Hx18"Wx? i was wondering the hertz i should tune it for comp for comp
swez on 07/25/2004 05:15:08
If these subs are that old, best to write/call Kicker and ask them about what is recommended for these subs. If not covered by the current website, it's the only way to get the right information.
Swez
racerbizoehm on 07/25/2004 17:49:35
yeh hes talking about single voice coil model VR = DVC plain comp SVC, but I even seen that a single requires more than the dual for my 12 inch I have so anything under 2 for each sub is bad deal
cplkittle on 07/26/2004 00:13:29
Most recommended tuned frequencies are at or around the F3 This is the 3dB downpoint of the sub. The reason for this is to extend the dB 'shelf' as far as possible (3dB gain at tuned frequency @ the 3dB downpoint of the sub) The F3 is usually 3-5 Hz below the Fs (free air resonance) To get maximum SPL at a low frequency I recommend tuning at or slightly above the Fs.
Bigeazy4387 on 07/26/2004 20:51:52
alright thanks for tha input cplkittle i dont have the fs on my manual and kicker doesn't have it on its site i email kicker and will come back as i dont know my xmax and dont want to overthrow my woofers by doing this
swez on 07/27/2004 09:44:52
Good plan Stan! Ask the guys who made them.
Swez
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