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Post by TLC510 on Feb 10, 2012 10:04:12 GMT -5
I have never bi-amped my speakers before, but wanted to give it a try. I was wondering if i should split the Left Right channels and send the full range to the mid/upper on the speakers and to the 12" sub on their base. Or, should I split the sub out and send only the lower frequencies? What is the most common method?
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jlafrenz
Global Moderator 
I don't want to jump in, unless this music's thumping
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Post by jlafrenz on Feb 10, 2012 13:33:34 GMT -5
Need a little more information about what amp and processor you are using. When you bi-amp you split the signal (using a "Y" splitter) from the processor end and connect it to 2 different channels of the amp (or different amps if you are going that route). You will need to remove the bridge between the speaker posts. One set of wires will go from the amp to the top binding posts and the other to the bottom set. The sub will not be involved in this process. Full range will depend on how you have this setup in your processor.
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Post by TLC510 on Feb 13, 2012 16:15:33 GMT -5
I understand how to bi-amp the speakers(remove bridge, split RCA going to 5 channel amp, two runs from amp to speaker). The speakers have a 12" woofer built into the base, and i assume the bottom set of posts is for that 12 inch-er(although maybe I'm wrong to assume that). My question was on splitting the left right channels with full range, or splitting the sub output. Is one of these splitting options generally the superior choice?
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Post by jmilton on Feb 13, 2012 16:22:36 GMT -5
I understand how to bi-amp the speakers(remove bridge, split RCA going to 5 channel amp, two runs from amp to speaker). The speakers have a 12" woofer built into the base, and i assume the bottom set of posts is for that 12 inch-er(although maybe I'm wrong to assume that). My question was on splitting the left right channels with full range, or splitting the sub output. Is one of these splitting options generally the superior choice?  |
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DYohn
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Posts: 18,348
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Post by DYohn on Feb 13, 2012 17:01:53 GMT -5
Normally in a passive bi-amp like you are apparently planning, the same signal is sent to both inputs of the loudspeaker. Split right to two amps, split left to two amps. Any benefits from this may or may not be apparent. The subwoofer output is sent to your subwoofer, not to the woofers in your front mains.
What loudspeakers are you using?
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Post by TLC510 on Mar 26, 2012 16:11:43 GMT -5
I've been doing a bit more research and think i have my answer. The Speakers that I am looking to by-amp are a pair of infinity QLS-1's. The lower posts power the 12" Watkins woofer. I really just want to be certain that I have enough power to drive these speakers. Since most setups that i have seen for these are powered by two channel amps with the bridges in place, i intend to split the left and right channels from the UMC-1, and leave the sub output open for a powered sub maybe sometime in the future.
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Post by wizardofoz on Mar 26, 2012 19:41:43 GMT -5
You perhaps get better power balance running the left channels to one 2 channel amp and the right to the other 2 channel amp ( NOT like in the diagram above) so that all the bass is shared between the 2 amps and not all on one... unless that is you have a much beefier (like XPA-2) for the bass and lighter weight (like UPA-2) for the highs... IMHO anyway. Hope that makes sense. Ideally you should consider active equalisation to with something like a miniDSP to split the lo/hi passing of signals See this thread too emotivalounge.proboards.com/index.cgi?board=amps&action=display&thread=23401 |
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Post by TLC510 on May 4, 2012 2:08:27 GMT -5
Just finished refoaming the woofer, so I should be putting these in the house and testing them soon Attachments:
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Post by GreenKiwi on May 4, 2012 12:11:10 GMT -5
wow those are big...
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Post by TLC510 on May 25, 2012 16:54:40 GMT -5
So I found out these speakers have an internal crossover so there was no benefit to using the sub output to send the 250 Hz and lower to the bottom posts, except for it let me manually adjust the base level. I ended up splitting the left and right channels, an and using two channels on my XPA-5 to drive each speaker. Sounded great. I just got an Ampzilla II up and running though, so now it's back to a single stereo amp for the QLS-1's, single wire and jumpers on the posts. Sounds great an frees up the XPA-5 for the surround speakers.
UMC-1, XPA-5, Ampzilla II, 2 x QLS-1, 2 x Polk RTI1000, Polk CS10, AppleTV
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Post by meldhache on May 27, 2012 22:08:41 GMT -5
I am a newbie to your products, I couldn't find any references to using the umc-1 to internally change the back surround signals to biamplify my fronts. I know i can physically just split the fronts rca outputs to my amps and probably set up the preamp for only 5.1 duty. thanks
mel
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Post by wizardofoz on May 27, 2012 22:14:53 GMT -5
I am a newbie to your products, I couldn't find any references to using the umc-1 to internally change the back surround signals to biamplify my fronts. I know i can physically just split the fronts rca outputs to my amps and probably set up the preamp for only 5.1 duty. thanks mel I doubt you can do this as there is no all channel stereo mode that works...or the ability to map front channels to other outputs - but that would be great if the option was there. take a look at www.minidsp.com as this could be the best option for this kind of setup |
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