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Post by sharkman on Feb 2, 2011 15:36:53 GMT -5
Just now I tried my XDA with a Paradigm PS1000(10" sub with 275 watt amp, band pass) and I could not get a lot of bass for music, which is what I'd like to upgrade my 2 channel system for. The sub seems to work better with the Onkyo 876, at least for movies, but with the XDA the sub felt like it was vibrating pretty good but not so much output, even with gain almost on "11". I'm wondering if the XDA might not have enough output voltage for a sub to really slam.
Any thoughts? Maybe I need a better sub?
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Post by Deleted on Feb 2, 2011 17:29:41 GMT -5
Could it be out of phase? I know with two subs having them out of phase results in everything in the room vibrating but little sound.
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Post by magico309d on Feb 2, 2011 17:59:20 GMT -5
If you are going to invest in decent speakers and sub, you'll want high and low pass frequency adjustment with independant gain control. You could spend more but this is probably what I would start with. It'll handle up to 3 subs too:http://www.parts-express.com/pe/pshowdetl.cfm?&DID=7&Partnumber=248-664&ctab=2#Tabs
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Post by sharkman on Feb 2, 2011 18:55:16 GMT -5
I tried adjusting the phase on the sub but I seemed to have no success. It is a rather old design and eight years old(600 retail at the time) to boot, so it just may not have the grunt.
That unit at parts express looks intriguing, I think I have some reading to do!
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Post by MurphMan on Feb 2, 2011 22:44:52 GMT -5
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Post by magico309d on Feb 3, 2011 9:24:18 GMT -5
Thanks for the feedback on the CX2310, I'm still going to pick one up for my party/garage system because of it's price/value. There are also countless other brands and models of crossovers to choose from at higher price points. Pro Audio gear does have WAF issues, that's for sure. |
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Post by curt248 on Feb 10, 2011 0:27:44 GMT -5
Would the usp-1 connected after the umc-1 pre/pro be the best solution for getting a sub to work with 2 channel music?
I love using the sub for low frequency since my mains don't go low well.
It appears that the xda-1 has no sub-woofer ability.
I love the sound of my umc-1 in direct mode from the dac of my squeezebox touch, but then there is no sub in the mix. As soon as I go to stereo mode to get the sub working the sound quality goes down.
Is there a good solution to this?
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Post by roadrunner on Feb 10, 2011 4:05:15 GMT -5
curt248
Yes, using the USP-1 is currently one of the best and easiest ways to add analog bass management by using the USP's ByPass switch. It allows you to share your HT system's Front L/R speakers, amps, and sub woofer. If you happen to have a spare self-powered sub woofer sitting around you could just run a cable from the second set of output connectors on the back of the XDA-1.
After the XSP-1 is released, it will be the most elegant solution. The XSP-1 has a fully balanced signal path that will allow you to add bass management without degrading the sound quality. It uses the same dual differential, balanced output circuitry as that used by the XDA-1.
The best sound quality from Emotiva's stereo and HT pre/pros is shown below -- with the highest quality listed first and the lowest is listed last.
XSP-1 Stereo Pre-amp -- Best SQ
USP-1 Stereo Pre-amp -- Next Best
XMC-1 HT Processor -- Next Best (using Direct Mode)
UMC-1 HT Processor -- Next Best (using Direct Mode)
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Post by rclark on Feb 11, 2011 13:01:26 GMT -5
why not just go into the subs, cross there, and then from there go to the bookshelves?
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Post by kellys on Feb 11, 2011 13:56:20 GMT -5
Actually, the design I was suggesting improves on this by intercepting the digital SPDIF input and applying a highpass/lowpass crossover in the digital domain. The highpass filtered digital audio would be output via SPDIF to the XDA-1. This would preserve the sound quality by not adding a AD-DA conversion process. The sub analogue output would come directly from the MiniDSP balanced output. You would likely have to configure the MiniDSP to have a delay element to match the phase of the sub output and the XDA output, though the effect may or may not be audible.
IMHO, if you are going to use the MiniDSP after the XDA, then you may want to forego the XDA as well, and try to set up the MiniDSP on its own, sans XDA. You would be listening to the MiniDSP DA converters anyways, and the DA-AD conversion would only degrade the overall sound quality.
I am building a digital pre-amp using the Buffalo II board. If the active filters I am building to make a 2.1 output don't work well, I may give this idea a try...
Also, I asked Emotiva about whether the XMC will have analogue filtering to give a 2.1 output from the pure analogue signal path, and Vincent said it would. This may be a great feature if it makes it into the final design. This would make it a step up over the USP wouldn't it?
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Post by DevoDave on Feb 12, 2011 13:49:10 GMT -5
Following mrla's line of thought, could one run the balanced outs from the XDA-1 to power amps, then the RCA outs to a powered sub? This would only work if the balanced and RCA outs were both active. Can someone confirm that this is the case?
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Post by Samuel on Feb 12, 2011 14:44:30 GMT -5
Following mrla's line of thought, could one run the balanced outs from the XDA-1 to power amps, then the RCA outs to a powered sub? This would only work if the balanced and RCA outs were both active. Can someone confirm that this is the case? Yes, both are active all the time. Its the way I run my setup here. |
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Post by Deleted on Feb 12, 2011 15:18:08 GMT -5
I use two miniDSPs. They work wonderfully. While I have the test equipment I haven't taken it out and have adjusted things by ear. The only negative is how hard it is not to end up with a mess of tangled cables. Also, through my mis-wiring a tweeter I caused its premature death. But that was easily fixed. I use the miniDSPs for all front speakers including the subs with the latest "Advanced Crossover" plugin.
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