I've just purchased a pair of Adire Koda 8's on eBay. My current system consists of MA Y3K6C 6 1/2" speakers within kicks in the front and Infinity 6002i in the rear. I have a Kenwood KAC-8401 amp - 4 channel x 60 watts.
My plan was to make a .55cf box for one Koda 8; bridge two channels off the amp, and use that as a sub. However, Adire's webpage notes that the Pmax for the Koda 8 is 150W - I'm wondering if I wouldn't be better off building a box for both 8's and running them at 60W/channel each - it just seems that with 60W/speaker, I'd be running them more as another mid, instead of the desired sub. Anyway, I thought I'd check with the experts before proceeding.
Crum
Replies (8)
swez on 03/25/2005 09:31:02
The Koda 8's can make a good compact bass system in a sealed enclosure. The sealed enclosure will keep the subs from hitting X-max prematurely. The Low-Q alignment (.60) will net lower bass but less power handling too. You may like the Mid-Q alignment (.707) for high accuracy and good low frequency response at rated power.
You can get a nice blend between the two parameters by using say 0.45 cf per driver and 6 oz of fill per chamber. Very nice compact sub kit this way. Amp wise, figure 100-150 RMS watts per sub is plenty.
Swez
compvr15s on 03/25/2005 09:32:48
on thier web site, they refer to it as a midbass woofer, so i dont think your going to get the bass that you are expecting, but they also say that it will reach full potential with less power than that, id say run each one off a channel and see how you like it.
swez on 03/25/2005 09:38:22
This driver is a dual purpose product. With an Fs of 32 Hz., it is suitable for woofer applications. However, it has extended range and can easily be used as a midbass/midrange driver as well as sub applications. A very versitile product.
Swez
Crum on 03/25/2005 10:04:36
Thanks for the help guys. I'm really not looking for any significant bass, just a little rumble to fill in the system. I use the extended cab portion of my truck regularly, so I also wanted something compact - the Koda 8 seemed like a good fit.
My amp spec says that bridging two channels nets 180W - I have to think that the number is a little inflated. I likely stick to my original plan of building a box for one of these speakers. If I don't like the way it sounds, I may screw around with the box size, or look at getting a two amps - a 2 channel and Class D, so that I can connect the equipment more efficiently and thus add more power.
Again, thanks for the opinions.
Crum
compvr15s on 03/25/2005 10:39:19
yea id say ur amp prolly puts out closer to 110-120 bridged into a 4 ohm load.. but if your lookin to add a lil rumble im sure these will do you fine.
swez on 03/25/2005 19:28:24
If you have a 2 channel amp, you cannot bridge the amp channels while using both subs. That would stress the amp with a 2 ohm load. Using 1 channel per sub is fine.
However, if this amp is rated below 200 Wrms when bridged, you can use only 1 sub in bridged mode.
Swez
Crum on 03/26/2005 10:39:40
Yeah, I only plan to use one sub by bridging two channels; the other two channels will go to the front speakers.
Crum
swez on 03/26/2005 17:50:03
Gotcha!
Swez
My plan was to make a .55cf box for one Koda 8; bridge two channels off the amp, and use that as a sub. However, Adire's webpage notes that the Pmax for the Koda 8 is 150W - I'm wondering if I wouldn't be better off building a box for both 8's and running them at 60W/channel each - it just seems that with 60W/speaker, I'd be running them more as another mid, instead of the desired sub. Anyway, I thought I'd check with the experts before proceeding.
Crum
Replies (8)
swez on 03/25/2005 09:31:02
The Koda 8's can make a good compact bass system in a sealed enclosure. The sealed enclosure will keep the subs from hitting X-max prematurely. The Low-Q alignment (.60) will net lower bass but less power handling too. You may like the Mid-Q alignment (.707) for high accuracy and good low frequency response at rated power.
You can get a nice blend between the two parameters by using say 0.45 cf per driver and 6 oz of fill per chamber. Very nice compact sub kit this way. Amp wise, figure 100-150 RMS watts per sub is plenty.
Swez
compvr15s on 03/25/2005 09:32:48
on thier web site, they refer to it as a midbass woofer, so i dont think your going to get the bass that you are expecting, but they also say that it will reach full potential with less power than that, id say run each one off a channel and see how you like it.
swez on 03/25/2005 09:38:22
This driver is a dual purpose product. With an Fs of 32 Hz., it is suitable for woofer applications. However, it has extended range and can easily be used as a midbass/midrange driver as well as sub applications. A very versitile product.
Swez
Crum on 03/25/2005 10:04:36
Thanks for the help guys. I'm really not looking for any significant bass, just a little rumble to fill in the system. I use the extended cab portion of my truck regularly, so I also wanted something compact - the Koda 8 seemed like a good fit.
My amp spec says that bridging two channels nets 180W - I have to think that the number is a little inflated. I likely stick to my original plan of building a box for one of these speakers. If I don't like the way it sounds, I may screw around with the box size, or look at getting a two amps - a 2 channel and Class D, so that I can connect the equipment more efficiently and thus add more power.
Again, thanks for the opinions.
Crum
compvr15s on 03/25/2005 10:39:19
yea id say ur amp prolly puts out closer to 110-120 bridged into a 4 ohm load.. but if your lookin to add a lil rumble im sure these will do you fine.
swez on 03/25/2005 19:28:24
If you have a 2 channel amp, you cannot bridge the amp channels while using both subs. That would stress the amp with a 2 ohm load. Using 1 channel per sub is fine.
However, if this amp is rated below 200 Wrms when bridged, you can use only 1 sub in bridged mode.
Swez
Crum on 03/26/2005 10:39:40
Yeah, I only plan to use one sub by bridging two channels; the other two channels will go to the front speakers.
Crum
swez on 03/26/2005 17:50:03
Gotcha!
Swez
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