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Junior Varsity
iNuke nu3000DSP outputs when in bridged mode
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<blockquote data-quote="Steve Kirby" data-source="post: 141097" data-attributes="member: 9411"><p>Re: iNuke nu3000DSP outputs when in bridged mode</p><p></p><p>"<span style="color: #333333">and the load impedance capability is halved" This is the critical aspect of Mac's reply. Two 8 ohm cabinets paralleled are a 4 ohm load as the OP recognizes. But when the amp is in bridged mode, each side is effectively seeing a 2 ohm load. While some amps (don't know about the iNuke) are rated down to 2 ohms, running them there isn't necessarily such a good idea. 8 or 4 ohms is just a nominal rating. There will be frequencies where the true load the cabinet presents to the amp will be much lower. There may or may not be published impedance curves for the subs you have, but if you look up some of the better ones you can get an idea of how this looks. The net result is that at some frequency that you're probably trying to get a lot of output, you will be running the amp into a considerably lower load than it is intended for. While there is usually some headroom for this designed into amps, the more cost constrained the amp, the more likely for it to be less tolerant. This also starts to influence the amps "dampening factor" which is a ratio of the load to the amps internal impedance of the output stage. At higher speaker impedances, this is not a factor. But running a cost constrained amp into a 1 ohm load at near rated output will lead to a looser and more distorted sound even if it doesn't shut down in protect mode.</span></p></blockquote><p></p>
[QUOTE="Steve Kirby, post: 141097, member: 9411"] Re: iNuke nu3000DSP outputs when in bridged mode "[COLOR=#333333]and the load impedance capability is halved" This is the critical aspect of Mac's reply. Two 8 ohm cabinets paralleled are a 4 ohm load as the OP recognizes. But when the amp is in bridged mode, each side is effectively seeing a 2 ohm load. While some amps (don't know about the iNuke) are rated down to 2 ohms, running them there isn't necessarily such a good idea. 8 or 4 ohms is just a nominal rating. There will be frequencies where the true load the cabinet presents to the amp will be much lower. There may or may not be published impedance curves for the subs you have, but if you look up some of the better ones you can get an idea of how this looks. The net result is that at some frequency that you're probably trying to get a lot of output, you will be running the amp into a considerably lower load than it is intended for. While there is usually some headroom for this designed into amps, the more cost constrained the amp, the more likely for it to be less tolerant. This also starts to influence the amps "dampening factor" which is a ratio of the load to the amps internal impedance of the output stage. At higher speaker impedances, this is not a factor. But running a cost constrained amp into a 1 ohm load at near rated output will lead to a looser and more distorted sound even if it doesn't shut down in protect mode.[/COLOR] [/QUOTE]
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iNuke nu3000DSP outputs when in bridged mode
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