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Old August 1st, 2014, 5:45 AM
Mildbill Mildbill is offline
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High level inputs

I am wondering if the high level inputs on the subs present any resistance loads to the source amplifier. Although I am using a good, classic Luxman receiver, my present speakers are a 4 ohm load. If I add anything in parallel, it may overdraw the Luxman's amplifier. While it's true that the Luxman has preamp outs, the line-level inputs on the sub will likely be used by the AV amp or TV outs.

Will it be safe to use the high level outputs for my receiver? Do they present any sort of load at all?

This may be a good time to suggest incremental "notching" for the gain control BTW - so that you can switch sources and maintain volume balance between them. If they have this feature already, you can ignore this.

Last edited by Mildbill : August 2nd, 2014 at 9:31 AM.
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Old August 3rd, 2014, 8:40 PM
SME SME is offline
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Hi. The high level inputs on the sub should present a very high impedance load to the amp. Nearly all of the current will be going to the speakers, so in a sense, the amp won't see the sub high-level inputs.

Do keep in mind, however, that if you don't have high pass filters on the signals going to the mains speakers, your amp and speakers will still be called upon to reproduce the bass that the sub handles. If the listening level is high enough, this could cause distortion or amp shutdown from trying to handle bass that the speakers can't even reproduce.
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