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Which JL amp for 8.8s and a 10" sub??

Old 03-01-2015, 05:47 AM
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Default Which JL amp for 8.8s and a 10" sub??

Thinking either the m600/6 or the 700/5 to drive 2- 8.8s and a single M10IB5 sub.

One better than the other? Thanks!
Old 03-01-2015, 07:09 AM
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http://www.arcaudio.com/p/xdi850-5?pp=24
Old 03-01-2015, 07:19 AM
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I would look at the 700/5. This way the 880s get the power then need to shine.
Old 03-01-2015, 09:59 AM
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With the 700/5 bridged you're at 180w x 3, so the sub is getting the same power as the 8.8's. Just an FYI
Old 03-01-2015, 10:17 AM
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Originally Posted by dkwestern View Post
With the 700/5 bridged you're at 180w x 3, so the sub is getting the same power as the 8.8's. Just an FYI
Thanks - and with the 600/6 I'm at 200w x 3 bridged right? So that seems better for this application?? I could be missing something...I guess they are both pretty darn close.
Old 03-01-2015, 10:21 AM
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Probably the crossovers will be the difference
Old 03-01-2015, 10:31 AM
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Originally Posted by stratt7777 View Post
Thinking either the m600/6 or the 700/5 to drive 2- 8.8s and a single M10IB5 sub.

One better than the other? Thanks!
If limited to these two choices, even though there is a 20 watt advantage to the subwoofer with the 600/6 into a 4-ohm load as rated, I would go with the 700/5 because of the larger power supply and additional headroom while placing the amplifier in a more conservative position.
But in either case this is a difficult scenario with the selected speakers. Here's why.
It takes four times the power and four times the excursion (or four times the surface area) to reproduce an octave lower at an equivalent amplitude. So having double the collective highpass power as lowpass power is an automatic mismatch. Also, two 8-inch 880s have more collective surface area than the single 10-inch subwoofer. Again, a bit of a mismatch in acoustic terms. So you know in advance which area will first reach its limit and be exposed. The system is only as good as the weakest link. I see value in balance.
I'm a major fan of the M or XD series of JL Audio amplifiers for numerous reasons. But in this rare case you might look beyond the JL Audio line for a more suitable amplifier with power distribution that better fits the application.
The other option is to wait for the soon to ship JL Audio IB 12-inch....which is a monster! In that case you could run the M1000/5 amplifier. This would be a very balanced system in all aspects.
Of course, I make these comments without seeing the boat and without knowing if an IB 12-inch would fit.
Old 03-01-2015, 02:07 PM
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Originally Posted by dkwestern View Post
With the 700/5 bridged you're at 180w x 3, so the sub is getting the same power as the 8.8's. Just an FYI
This is incorrect. The 700/5 had a dedicated 300 watt sub channel. The other 4 channels will be bridged to feed the two 880's.
Old 03-01-2015, 02:21 PM
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Originally Posted by International Marine View Post
This is incorrect. The 700/5 had a dedicated 300 watt sub channel. The other 4 channels will be bridged to feed the two 880's.
Yes, rated at 300 watts on the mono sub channel into a 2-ohm load....but....the IB10 is a 4-ohm woofer. So into a 4-ohm load the M700/5 is actually 180 watts on channel 5.
Old 03-01-2015, 02:31 PM
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Originally Posted by David Analog View Post
Yes, rated at 300 watts on the mono sub channel into a 2-ohm load....but....the IB10 is a 4-ohm woofer. So into a 4-ohm load the M700/5 is actually 180 watts on channel 5.
Exactly! Isnt this the amp being discussed?
http://www.jlaudio.com/xd700-5-car-a...plifiers-98264
http://www.jlaudio.com/m700-5-marine...plifiers-98274

Last edited by BoemarineBrian; 03-01-2015 at 04:54 PM.
Old 03-01-2015, 02:46 PM
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All I know is those 8.8s are as big as a subwoofer. I would give them all the power they need and more.
Old 03-01-2015, 03:13 PM
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Originally Posted by Pioneer180 View Post
All I know is those 8.8s are as big as a subwoofer. I would give them all the power they need and more.
Absolutely! With 200 watts going to each (using one pair) 8-inch 880 running either the 600/6 or 700/5 in the 3-channel mode, that is 400 collective highpass watts. Or a bit less with a 12.6V supply. Good power. Even a little more wouldn't hurt.
But then how do you feel about the single 10-inch subwoofer getting only 180 to 200 watts total in that same system? Especially since the dual 8-inch coaxials have about 20% more collective surface area than the single 10-inch sub?
Old 03-01-2015, 03:36 PM
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Originally Posted by David Analog View Post
Absolutely! With 200 watts going to each (using one pair) 8-inch 880 running either the 600/6 or 700/5 in the 3-channel mode, that is 400 collective highpass watts. Or a bit less with a 12.6V supply. Good power. Even a little more wouldn't hurt.
But then how do you feel about the single 10-inch subwoofer getting only 180 to 200 watts total in that same system? Especially since the dual 8-inch coaxials have about 20% more collective surface area than the single 10-inch sub?
Agree. Maybe better an M400/4 and the M600/1 ?
Old 03-01-2015, 03:45 PM
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Originally Posted by dkwestern View Post
With the 700/5 bridged you're at 180w x 3, so the sub is getting the same power as the 8.8's. Just an FYI
Originally Posted by International Marine View Post
This is incorrect. The 700/5 had a dedicated 300 watt sub channel. The other 4 channels will be bridged to feed the two 880's.
Originally Posted by David Analog View Post
Yes, rated at 300 watts on the mono sub channel into a 2-ohm load....but....the IB10 is a 4-ohm woofer. So into a 4-ohm load the M700/5 is actually 180 watts on channel 5.
Thank you, David Analog

International, telling customers their sub is getting 300 watts off this amp is misleading.
Old 03-01-2015, 03:51 PM
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Originally Posted by David Analog View Post
Absolutely! With 200 watts going to each (using one pair) 8-inch 880 running either the 600/6 or 700/5 in the 3-channel mode, that is 400 collective highpass watts. Or a bit less with a 12.6V supply. Good power. Even a little more wouldn't hurt.
But then how do you feel about the single 10-inch subwoofer getting only 180 to 200 watts total in that same system? Especially since the dual 8-inch coaxials have about 20% more collective surface area than the single 10-inch sub?
I have read a lot of your posts on the wake board forums. I'm glad your here.
Old 03-01-2015, 03:54 PM
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I run 4 880's with a 800/8 bridge to 4x200. I have another set I run with a 400/4 also bridged to 200w a channel. I haven't installed a sub yet but I can tell you it is needed badly.
Old 03-01-2015, 04:12 PM
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You guys are correct on the ohms of the sub @4 ohms vs. the amp @ 2 ohms. The JL Audio M10IB5 is a perfect match for the sub channel as a single sub due to its power handling. Check the link.

http://www.jlaudio.com/m10ib5-cg-wh-...-drivers-91780
Old 03-01-2015, 04:13 PM
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Originally Posted by dkwestern View Post
Thank you, David Analog

International, telling customers their sub is getting 300 watts off this amp is misleading.
I didn't say the sub is getting 300, I said the amp is capable of delivering 300 on a dedicated sub channel. Now, if you look at what a single M10IB5 can handle, you'll see the M700/5 is the perfect match for what the OP asked. Bridge the 4 channels to run the 880's and the sub will have a dedicated channel.
Old 03-01-2015, 04:25 PM
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Originally Posted by BoemarineBrian View Post
Exactly! Isnt this the amp being discussed?
http://www.jlaudio.com/xd700-5-car-a...plifiers-98264

No, that one is not for marine applications. I hope you're not installing these in people's boats.
Old 03-01-2015, 04:26 PM
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I'm more on Dave analog side. Haven't been a fan of 8.8. Rather see 4 7s and 2 10s off a 900\5

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