I had an interesting idea while designing my newest enclosure for my 2 alpine type R 10" subs. i'm building a transmission line style enclosure for them.
the idea was tuning both subs to a differnt frequency. say tuning sub a in its own side of the enclosure to 35-40hz and block everything below tune frequency. and tune out everything about 65-70hz to that one and then tune sub B to 60-75hz... and blocking everything below that to that sub of course...
I have a audio control EQX so blocking the desired frequencies to that channel of the amp is really easy. the question is how would this sound? would it sound better or more muddy... this isnt soemthing i plan on doing i'm still designing just a standar ported box. but i was wondering how this would sound the good and the bad about this set up..
thanks in advance.
Chronos
Replies (19)
uochronos on 10/28/2004 03:38:16
noone on this?
Victor on 10/28/2004 07:59:58
hmmmm... u will be blocking everything below 35-40hz in sub B and 65-70hz in sub B..
and transmission line enclosures.. seems interesting but i doubt its performance..
what i feel is that at frequencies where sub A will stop performing the sub B shall take over.. i feel that you may get better SQ performance . but u wont be able to reinforce sound from both the subs for a louder SPL performance..
then again... in music with extreme fast beats.. ranging from 35hz to 100hz both the woofers will put out different frequency sound individually and not together making it hard to distinguish each beat..
but ideally according to the arrangement it should perform well..
cause different box are given the job to put out different frequencies ..just like a cross over..
now one more thing.. your mids in front pick up bass at around 50hz to 65hz.. so subA will sound as if its coming from the rear while the subB will merge and reinforce the sound from the front mids giving a good staging.. but then sound from subA would feel out of place..
Placement of the woofers and the acoustics of your car will be a major deciding factor wether it wud sound good or bad..
i would suggest that instead of two separate enclosures you make a single enclosure with a 10" and a 12" subs.. each given different frequencies through a bandpass crossover.. the 12" sub shud get freq from 30hz to 65hz.. and the 10" shud get freq from 65hz to 100hz..i feel this shud perform better..
interesting topic.. worth a healthy amount of discussion..
comments...??
Victor...
ttocs on 10/28/2004 13:38:21
wouldn't it lead to cancellation between the speakers? I wouldn't recommend it with the same size subs.....
uochronos on 10/28/2004 15:23:37
i hate bandpass actualy victor thanks for the input though.
as for Cancelation i would seperate the 2 subs completly niehter would be playing anything but the frequency they are tuned to adn above but sub a would also be no playing anything about 60hz. so if they are not playing the smae frequencies then can cancelation be a problem?
my mids do not kick in till 90hz and the subs stio at 90 hz. the corssover is a very steep one too so little mixing of the subs and the mids except around 80-100hz
as for its performance victor they perform as well as ported boxes if not better. i have heard a couple. and heard about peoples results from this design and it works quite well.
also like i said this is more a hypothetical question i'm not building this right now but may in the futue mattering what input i get...
also victor SPL is not an issue first off i'm an SQ guy second a single type R is loud enough for me in a ported box usualy. the onyl reason i'm going ported on these for now is to have soemthign to play with till i decide on a new sub and have funds to get one.
Chronos
Chronos
Victor on 10/28/2004 15:41:41
ok.. but i think u got me wrong somewhere.. i did not ask you to build a bandpass enclosure.. i asked you to provide different frequencies to different woofers using a bandpass crossover..hehehe..
i dont think cancellation shud be a problem..but i feel placement and car acoustics are a major major factor with such kind of installations...
but i wud suggest integrating to 2 subs of different sizes both handling different frequencies.. with the bigger sub getting lower bass freq and the smaller size sub getting from 65hz to 100hz..
this wud be a much better install..( I feel so)...
comments...??
Victor...
Victor on 10/28/2004 15:47:45
chronos.... making a transmission line enclosure is an exciting project.. if u ever make it.. please let me know and please share your experience with me..
I wud want to make one too.. but i dont wanna do it before i get a customer who orders for one..
Victor...
uochronos on 10/28/2004 15:54:13
I have built one before i'am building another one now. just not tuning it to 2 seperate frequenciues right now.. prettty simple to build as long as you have alot of clamps..
as for crossovers my amp has one my EQX is one and my HU has one hehe. adding yet another crossover liek a bandpass crossover here would only do to add more interferance in my system.
like i said though i'm sticking with these current subs because i dont want to buy mroe now so getting a small and a large one is out.
as for placement look at what i drive heheits either left back seet right back seet or nowhere. so it doesnt matter which local i put it in. an extended cab ranger does not have alot of room.
Chronos
Victor on 10/28/2004 15:56:58
OH.. THE CAR AND THE EQX GOT COMPLETELY SKIPPED.. LOL.. HEHEHEHEHE..
OKIE.. BUT WHEN EVER YOU TRY SOMETHING NEW WITH ENCLOSURES DO LET ME KNOW..
THANKS..
VICTOR...
uochronos on 10/28/2004 16:01:10
lol i probaly build a box every month or so. rarely use them for long but they all have been custom fits to what ever i drive and a little differnt.
Chronos
swez on 10/29/2004 21:03:54
Sorry for juming in so late... just saw this post buried down in the list.
Can it be done? Yes, I think so. Just not sure if you will get the deep bass you want from a 10" woofer. Yes, the specs on SWR's say Fs is 28 Hz. That's not bad at all for a 10" sub.
It seems to me, porting the LF sub to say 30 Hz., would be a good place to start. The MB sub can be sealed, in a much smaller enclosure and filtered as noted. The net result should be nice low thump from the ported sub and very good punch from the sealed MB 10.
Crutchfield notes ported range beteen 0.6 - 1.25 cf. I think going to 1.25 would cut power handling and perhaps sloppy low end bass. A 1.0 cf ported makes sense here.
As for the sealed sub, specs noted are 0.5 - 0.8 cf. The smaller side of the spec will naturally roll off lows and power handling will be good as well. It makes sense to use 0.5 - 0.65 cf here.
If you do build a TL sub box, the port will take up a large amount of space. (you already know that right) But if you wanted to integrate both subs into 1 enclosure, vent on one side and small sealed sub on other side might work. Can use same "H" & "D" here, just change the "W" on sealed to meet cf target.
If that looks too odd on paper, (esthetics wise) can make H, D & W in proportion to match ported side and install a divider panel in sealed enclosure side to give proper cf needs and it should look a bit better too.
The other option I can imagine, is to put both woofers to far ends and port out the middle section of the box. Yes, the port will be off center compared to most conventional enclosures, but hey... there are some trade offs we have to accept with TL designs.
What say you?
Swez
cplkittle on 10/31/2004 22:39:40
TLs hit really low, but are sloppy as hell. The best experience I have had with a TL is with a huge box for a single 15 and two 8's sealed for punch. The 8's handled almost all of the bass, the 15 just sloppily rumbled from the teens up to the lower 30's. It sounded good together, but like I said the box was huge for the 15.. over 4 cubes.
uochronos on 11/1/2004 19:44:02
wow go away for a weekend and everyone awnsers lol... ya i know a 10 wont hit super low swez. i just want to get a tad more low end... ya after rethinking i i think i may only do one sub TL and the other sealed. here is my new idea 1 sub in a 1cubic foot TL box and the second sub in sealed box say .7cubic feet.
now the first sub well be tuned to 35hz now i well let that sub play all the way to 60hz. and i well cutout everything above that. wel be cut out now i well put the other in a .5 sealed box it well play from 60-120hz or so & my midrange well pick up there...
also do transmision lines have a specific equation to figure out port size or do you use a regular ported equation?
Chronos
LC1 on 11/1/2004 21:32:42
uochronos,
Give Alpine Tech Support a call, that is what I did to ask about the port dim. for my SWR-1241D. It ended up being 1.5"x13"x31" with a 1.75cuft internal volume(that is with the sub displacement and port baffles)
Here is the link to my design for my TL enclosure for my 12" sub, I am sure you could easily change it accomodate your 10" if you like my design lol.
http://www.pbase.com/lc1/vented_enclosure
If you have any questions about it, feel free to ask.
-Jay-
uochronos on 11/2/2004 00:12:45
ya i can get port dimensions easy but i want to know if TL enclosures have a differnt formula or anything. chronos thanks for the advice though.
Chronos
uochronos on 11/2/2004 00:12:47
ya i can get port dimensions easy but i want to know if TL enclosures have a differnt formula or anything. chronos thanks for the advice though.
Chronos
Victor on 11/2/2004 06:28:43
you can get all the info u need from this site.... it has got tonnes of tech details.. do's & dont's.. guidlines.. designs... numerous projects.. its a world of TL enclosures.. You shall spend days reading this stuff if u are really interested in reading all of it.. but its a ig piece of cake when it comes to knowledge on Transmission Line enclosures..
http://www.t-linespeakers.org/
comments...???
Victor...
swez on 11/2/2004 09:48:23
The link shown by LC1 seems to be more relavent to the design you may wish to pursue. Victor's contributions are very good for large HT
T-lines, where enclosure space is not so limited. Good reading... but most designs I saw there are small drivers in tall columns. More like a pipe organ design.
Here, [http://www.pbase.com/lc1/vented_enclosure] you are really using a ported labyrinth design. Instead of a traditional round port, we shift to a tuned slot/vent system. More compact in size and we basically are replacing the round port, with a long rectangular vent system. Same idea, just many folds to attain proper vent dimensions.
If you know the round port dimensions of a port, (recommended by the Mfg.) can mathmatically calculate the "area" of the round port to a rectangle. I forget the formulae used, but it was pretty easy to do, with the proper equation manipulations.
Other than that, I think you are on the right track. Vented for the sub and small sealed for the MB driver. Just a matter of power management and signal attenuation to tone down the MB driver output and perhaps boost the LF bass input to the subwoofer. Most likely, the MB driver will net several dB more output in its' frequency range as the speaker is much more efficient in that upper range. (several dB for sure)
A two channel amp would make this very easy to do. One channel to MB and the other to subwoofer and your EQX to manage both frequency bands independently.
NOTE: As I review the EQX, it seems the bass control section is a dual channel device. (L&R) It appears that you will need to adjust the "L" channel for subwoofer controls and the "R" channel can manage the MB driver funtions. That means a 2 channel amp or a MONO amp fed of "L" channel outs to subwoofer and a separate amp channel (or amp for the MB driver controlled off the "R" channel of the EQX. The MB driver will only need a modest amp to bring it up to adequate SPL. (maybe 3-6 dB less power than the sub will require here)
Example:
300 RMS to subwoofer @ 2 ohms
75 - 150 RMS to MB driver should be plenty. (2 or 8 ohms)
There are 6 adustments for LF drivers (31.5 - 180 Hz) and 7 bands of adjustment for the Mids and highs. (250 - 16.0 Khz)
Hope that helps,
Swez
PS I cannot find frequency VS impedence plots on the 1041D. It would be good to know what the impedence range is VS frequency. The sub has a low Fs of 30 Hz. (per manual) That means you can tune your box to 30-35 Hz. with excellent results. Then use a SS filter to block everything below PTF.
BTW, would you consider using a smaller driver for the MB function? I would think an 8" sub with 100-150 RMS power handling is plenty here. Smaller box, less amp power is needed and you'll have a spare 10" Alpine sub for your next design. The Adire Koda 8" come to mind as an excellent MB driver. (60 - 180 Hz.) Only $80.00 for this MB driver and it is a 4 ohm SVC as well. Very linear response curve in the range noted above. High SPL and above average SQ as well. The sealed enclosure size that fits best and is most linear at your target range, is the 0.25cf sealed enclosure. In this size box, 75 -150 watts will give you plenty of MB punch.
http://www.adireaudio.com/TextPages/Koda8PageFrameText.htm
uochronos on 11/2/2004 12:17:37
wow tons of info thanks alot... be reading for quite some time.
my amp is a 2 channel class T 1200.2 avionixx amp i have it set at half gain so its puting out around 600-700watts. i would consider another sub for the MB driver currently i'm building a loud enclosure for the type r's a ported box tuned to 40hz. so currently i wont be taking on the above project just getting all my info in order.
the koda look very promising and an extremly good price for it. the only problem is the wattage i well have to adjust the EQX till it sounds right.
i'm also using winISD so getting port details and what not is easy.
thanks alot for all the info.
swez on 11/3/2004 09:42:04
Well, you can always use an 8 ohm MB driver to cut your power in half. Here's a short list of potential drivers to consider:
1. http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=295-100 $50.00
Specifications: Power handling: 180 watts RMS/250 watts max * Voice coil diameter: 2" * Voice coil inductance: 1.56 mH * Nominal impedance: 8 ohms * DC resistance: 7.5 ohms * Frequency response: 45-3,000 Hz * Magnet weight: 38 oz. * Fs: 44.9 Hz * SPL: 91.1 dB 1W/1m * Vas: 1.34 cu. ft. * Qms: 13.54 * Qes: .41 * Qts: .40 * Xmax: 6.4mm * Net weight: 8 lbs. * Dimensions: Overall Diameter: 8-3/16", Cutout Diameter: 7-3/16", Mounting Depth: 4", Magnet Diameter: 5-1/4", Magnet Height: 1-1/2".
Hummm, this is a short list for the moment as I have run out of time.
Swez
the idea was tuning both subs to a differnt frequency. say tuning sub a in its own side of the enclosure to 35-40hz and block everything below tune frequency. and tune out everything about 65-70hz to that one and then tune sub B to 60-75hz... and blocking everything below that to that sub of course...
I have a audio control EQX so blocking the desired frequencies to that channel of the amp is really easy. the question is how would this sound? would it sound better or more muddy... this isnt soemthing i plan on doing i'm still designing just a standar ported box. but i was wondering how this would sound the good and the bad about this set up..
thanks in advance.
Chronos
Replies (19)
uochronos on 10/28/2004 03:38:16
noone on this?
Victor on 10/28/2004 07:59:58
hmmmm... u will be blocking everything below 35-40hz in sub B and 65-70hz in sub B..
and transmission line enclosures.. seems interesting but i doubt its performance..
what i feel is that at frequencies where sub A will stop performing the sub B shall take over.. i feel that you may get better SQ performance . but u wont be able to reinforce sound from both the subs for a louder SPL performance..
then again... in music with extreme fast beats.. ranging from 35hz to 100hz both the woofers will put out different frequency sound individually and not together making it hard to distinguish each beat..
but ideally according to the arrangement it should perform well..
cause different box are given the job to put out different frequencies ..just like a cross over..
now one more thing.. your mids in front pick up bass at around 50hz to 65hz.. so subA will sound as if its coming from the rear while the subB will merge and reinforce the sound from the front mids giving a good staging.. but then sound from subA would feel out of place..
Placement of the woofers and the acoustics of your car will be a major deciding factor wether it wud sound good or bad..
i would suggest that instead of two separate enclosures you make a single enclosure with a 10" and a 12" subs.. each given different frequencies through a bandpass crossover.. the 12" sub shud get freq from 30hz to 65hz.. and the 10" shud get freq from 65hz to 100hz..i feel this shud perform better..
interesting topic.. worth a healthy amount of discussion..
comments...??
Victor...
ttocs on 10/28/2004 13:38:21
wouldn't it lead to cancellation between the speakers? I wouldn't recommend it with the same size subs.....
uochronos on 10/28/2004 15:23:37
i hate bandpass actualy victor thanks for the input though.
as for Cancelation i would seperate the 2 subs completly niehter would be playing anything but the frequency they are tuned to adn above but sub a would also be no playing anything about 60hz. so if they are not playing the smae frequencies then can cancelation be a problem?
my mids do not kick in till 90hz and the subs stio at 90 hz. the corssover is a very steep one too so little mixing of the subs and the mids except around 80-100hz
as for its performance victor they perform as well as ported boxes if not better. i have heard a couple. and heard about peoples results from this design and it works quite well.
also like i said this is more a hypothetical question i'm not building this right now but may in the futue mattering what input i get...
also victor SPL is not an issue first off i'm an SQ guy second a single type R is loud enough for me in a ported box usualy. the onyl reason i'm going ported on these for now is to have soemthign to play with till i decide on a new sub and have funds to get one.
Chronos
Chronos
Victor on 10/28/2004 15:41:41
ok.. but i think u got me wrong somewhere.. i did not ask you to build a bandpass enclosure.. i asked you to provide different frequencies to different woofers using a bandpass crossover..hehehe..
i dont think cancellation shud be a problem..but i feel placement and car acoustics are a major major factor with such kind of installations...
but i wud suggest integrating to 2 subs of different sizes both handling different frequencies.. with the bigger sub getting lower bass freq and the smaller size sub getting from 65hz to 100hz..
this wud be a much better install..( I feel so)...
comments...??
Victor...
Victor on 10/28/2004 15:47:45
chronos.... making a transmission line enclosure is an exciting project.. if u ever make it.. please let me know and please share your experience with me..
I wud want to make one too.. but i dont wanna do it before i get a customer who orders for one..
Victor...
uochronos on 10/28/2004 15:54:13
I have built one before i'am building another one now. just not tuning it to 2 seperate frequenciues right now.. prettty simple to build as long as you have alot of clamps..
as for crossovers my amp has one my EQX is one and my HU has one hehe. adding yet another crossover liek a bandpass crossover here would only do to add more interferance in my system.
like i said though i'm sticking with these current subs because i dont want to buy mroe now so getting a small and a large one is out.
as for placement look at what i drive heheits either left back seet right back seet or nowhere. so it doesnt matter which local i put it in. an extended cab ranger does not have alot of room.
Chronos
Victor on 10/28/2004 15:56:58
OH.. THE CAR AND THE EQX GOT COMPLETELY SKIPPED.. LOL.. HEHEHEHEHE..
OKIE.. BUT WHEN EVER YOU TRY SOMETHING NEW WITH ENCLOSURES DO LET ME KNOW..
THANKS..
VICTOR...
uochronos on 10/28/2004 16:01:10
lol i probaly build a box every month or so. rarely use them for long but they all have been custom fits to what ever i drive and a little differnt.
Chronos
swez on 10/29/2004 21:03:54
Sorry for juming in so late... just saw this post buried down in the list.
Can it be done? Yes, I think so. Just not sure if you will get the deep bass you want from a 10" woofer. Yes, the specs on SWR's say Fs is 28 Hz. That's not bad at all for a 10" sub.
It seems to me, porting the LF sub to say 30 Hz., would be a good place to start. The MB sub can be sealed, in a much smaller enclosure and filtered as noted. The net result should be nice low thump from the ported sub and very good punch from the sealed MB 10.
Crutchfield notes ported range beteen 0.6 - 1.25 cf. I think going to 1.25 would cut power handling and perhaps sloppy low end bass. A 1.0 cf ported makes sense here.
As for the sealed sub, specs noted are 0.5 - 0.8 cf. The smaller side of the spec will naturally roll off lows and power handling will be good as well. It makes sense to use 0.5 - 0.65 cf here.
If you do build a TL sub box, the port will take up a large amount of space. (you already know that right) But if you wanted to integrate both subs into 1 enclosure, vent on one side and small sealed sub on other side might work. Can use same "H" & "D" here, just change the "W" on sealed to meet cf target.
If that looks too odd on paper, (esthetics wise) can make H, D & W in proportion to match ported side and install a divider panel in sealed enclosure side to give proper cf needs and it should look a bit better too.
The other option I can imagine, is to put both woofers to far ends and port out the middle section of the box. Yes, the port will be off center compared to most conventional enclosures, but hey... there are some trade offs we have to accept with TL designs.
What say you?
Swez
cplkittle on 10/31/2004 22:39:40
TLs hit really low, but are sloppy as hell. The best experience I have had with a TL is with a huge box for a single 15 and two 8's sealed for punch. The 8's handled almost all of the bass, the 15 just sloppily rumbled from the teens up to the lower 30's. It sounded good together, but like I said the box was huge for the 15.. over 4 cubes.
uochronos on 11/1/2004 19:44:02
wow go away for a weekend and everyone awnsers lol... ya i know a 10 wont hit super low swez. i just want to get a tad more low end... ya after rethinking i i think i may only do one sub TL and the other sealed. here is my new idea 1 sub in a 1cubic foot TL box and the second sub in sealed box say .7cubic feet.
now the first sub well be tuned to 35hz now i well let that sub play all the way to 60hz. and i well cutout everything above that. wel be cut out now i well put the other in a .5 sealed box it well play from 60-120hz or so & my midrange well pick up there...
also do transmision lines have a specific equation to figure out port size or do you use a regular ported equation?
Chronos
LC1 on 11/1/2004 21:32:42
uochronos,
Give Alpine Tech Support a call, that is what I did to ask about the port dim. for my SWR-1241D. It ended up being 1.5"x13"x31" with a 1.75cuft internal volume(that is with the sub displacement and port baffles)
Here is the link to my design for my TL enclosure for my 12" sub, I am sure you could easily change it accomodate your 10" if you like my design lol.
http://www.pbase.com/lc1/vented_enclosure
If you have any questions about it, feel free to ask.
-Jay-
uochronos on 11/2/2004 00:12:45
ya i can get port dimensions easy but i want to know if TL enclosures have a differnt formula or anything. chronos thanks for the advice though.
Chronos
uochronos on 11/2/2004 00:12:47
ya i can get port dimensions easy but i want to know if TL enclosures have a differnt formula or anything. chronos thanks for the advice though.
Chronos
Victor on 11/2/2004 06:28:43
you can get all the info u need from this site.... it has got tonnes of tech details.. do's & dont's.. guidlines.. designs... numerous projects.. its a world of TL enclosures.. You shall spend days reading this stuff if u are really interested in reading all of it.. but its a ig piece of cake when it comes to knowledge on Transmission Line enclosures..
http://www.t-linespeakers.org/
comments...???
Victor...
swez on 11/2/2004 09:48:23
The link shown by LC1 seems to be more relavent to the design you may wish to pursue. Victor's contributions are very good for large HT
T-lines, where enclosure space is not so limited. Good reading... but most designs I saw there are small drivers in tall columns. More like a pipe organ design.
Here, [http://www.pbase.com/lc1/vented_enclosure] you are really using a ported labyrinth design. Instead of a traditional round port, we shift to a tuned slot/vent system. More compact in size and we basically are replacing the round port, with a long rectangular vent system. Same idea, just many folds to attain proper vent dimensions.
If you know the round port dimensions of a port, (recommended by the Mfg.) can mathmatically calculate the "area" of the round port to a rectangle. I forget the formulae used, but it was pretty easy to do, with the proper equation manipulations.
Other than that, I think you are on the right track. Vented for the sub and small sealed for the MB driver. Just a matter of power management and signal attenuation to tone down the MB driver output and perhaps boost the LF bass input to the subwoofer. Most likely, the MB driver will net several dB more output in its' frequency range as the speaker is much more efficient in that upper range. (several dB for sure)
A two channel amp would make this very easy to do. One channel to MB and the other to subwoofer and your EQX to manage both frequency bands independently.
NOTE: As I review the EQX, it seems the bass control section is a dual channel device. (L&R) It appears that you will need to adjust the "L" channel for subwoofer controls and the "R" channel can manage the MB driver funtions. That means a 2 channel amp or a MONO amp fed of "L" channel outs to subwoofer and a separate amp channel (or amp for the MB driver controlled off the "R" channel of the EQX. The MB driver will only need a modest amp to bring it up to adequate SPL. (maybe 3-6 dB less power than the sub will require here)
Example:
300 RMS to subwoofer @ 2 ohms
75 - 150 RMS to MB driver should be plenty. (2 or 8 ohms)
There are 6 adustments for LF drivers (31.5 - 180 Hz) and 7 bands of adjustment for the Mids and highs. (250 - 16.0 Khz)
Hope that helps,
Swez
PS I cannot find frequency VS impedence plots on the 1041D. It would be good to know what the impedence range is VS frequency. The sub has a low Fs of 30 Hz. (per manual) That means you can tune your box to 30-35 Hz. with excellent results. Then use a SS filter to block everything below PTF.
BTW, would you consider using a smaller driver for the MB function? I would think an 8" sub with 100-150 RMS power handling is plenty here. Smaller box, less amp power is needed and you'll have a spare 10" Alpine sub for your next design. The Adire Koda 8" come to mind as an excellent MB driver. (60 - 180 Hz.) Only $80.00 for this MB driver and it is a 4 ohm SVC as well. Very linear response curve in the range noted above. High SPL and above average SQ as well. The sealed enclosure size that fits best and is most linear at your target range, is the 0.25cf sealed enclosure. In this size box, 75 -150 watts will give you plenty of MB punch.
http://www.adireaudio.com/TextPages/Koda8PageFrameText.htm
uochronos on 11/2/2004 12:17:37
wow tons of info thanks alot... be reading for quite some time.
my amp is a 2 channel class T 1200.2 avionixx amp i have it set at half gain so its puting out around 600-700watts. i would consider another sub for the MB driver currently i'm building a loud enclosure for the type r's a ported box tuned to 40hz. so currently i wont be taking on the above project just getting all my info in order.
the koda look very promising and an extremly good price for it. the only problem is the wattage i well have to adjust the EQX till it sounds right.
i'm also using winISD so getting port details and what not is easy.
thanks alot for all the info.
swez on 11/3/2004 09:42:04
Well, you can always use an 8 ohm MB driver to cut your power in half. Here's a short list of potential drivers to consider:
1. http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=295-100 $50.00
Specifications: Power handling: 180 watts RMS/250 watts max * Voice coil diameter: 2" * Voice coil inductance: 1.56 mH * Nominal impedance: 8 ohms * DC resistance: 7.5 ohms * Frequency response: 45-3,000 Hz * Magnet weight: 38 oz. * Fs: 44.9 Hz * SPL: 91.1 dB 1W/1m * Vas: 1.34 cu. ft. * Qms: 13.54 * Qes: .41 * Qts: .40 * Xmax: 6.4mm * Net weight: 8 lbs. * Dimensions: Overall Diameter: 8-3/16", Cutout Diameter: 7-3/16", Mounting Depth: 4", Magnet Diameter: 5-1/4", Magnet Height: 1-1/2".
Hummm, this is a short list for the moment as I have run out of time.
Swez
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