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Post by foggy1956 on Dec 7, 2017 11:59:22 GMT -5
Still, the first thing to try is unplug the subs from the amp at the amp and try again. That will show if there is a bad connection after the amp. It's simple to try. I'm sure Emo would like to know if the 250 is resetting using Dirac levels even with no speakers connected. Agreed, I am also wondering if perhaps he didn't mis wire something in the back of the xmc?
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Post by heroesunplugged on Dec 7, 2017 12:00:18 GMT -5
Yes, will try that too. Thanks for the reinforcement.
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Post by heroesunplugged on Dec 7, 2017 12:01:16 GMT -5
Just don't want to keep sending the amp into protect, but want to figure it out.
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Post by heroesunplugged on Dec 7, 2017 12:22:34 GMT -5
Still, the first thing to try is unplug the subs from the amp at the amp and try again. That will show if there is a bad connection after the amp. It's simple to try. I'm sure Emo would like to know if the 250 is resetting using Dirac levels even with no speakers connected. Agreed, I am also wondering if perhaps he didn't mis wire something in the back of the xmc? While I'm not beyond error when plugging something in, or reversing the phase on a speaker cable, the 2 XLRs for the subs are connected correctly. No problem when using music for playback at high levels. And the response from the speakers is smooth enough I could likely go louder when leaving them set to Preset 1. No filters are applied. No enhancements or adjustments of any kind. The only adjustment, I have made, is to bring the sub levels down a couple of decibels, because the song or disc called for it. I was also careful to make sure that, the polarity on the 15s are connected to the appropriate terminal, so they're in phase. If a mistake was made, I'd either hear it or the SA-250 should respond the same way during music playback. I'm very aware of out of phase sound and can usually figure that out within seconds. I will try your suggestions and post the results, once I get a chance this afternoon.
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Post by foggy1956 on Dec 7, 2017 13:31:38 GMT -5
Agreed, I am also wondering if perhaps he didn't mis wire something in the back of the xmc? While I'm not beyond error when plugging something in, or reversing the phase on a speaker cable, the 2 XLRs for the subs are connected correctly. No problem when using music for playback at high levels. And the response from the speakers is smooth enough I could likely go louder when leaving them set to Preset 1. No filters are applied. No enhancements or adjustments of any kind. The only adjustment, I have made, is to bring the sub levels down a couple of decibels, because the song or disc called for it. I was also careful to make sure that, the polarity on the 15s are connected to the appropriate terminal, so they're in phase. If a mistake was made, I'd either hear it or the SA-250 should respond the same way during music playback. I'm very aware of out of phase sound and can usually figure that out within seconds. I will try your suggestions and post the results, once I get a chance this afternoon. No judgement here my friend, just looking for ideas. Seems odd though that trying to set levels for a main speaker would drive the sub into protect.
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Post by heroesunplugged on Dec 7, 2017 14:26:14 GMT -5
True. That has me stumped since the mic is listening to the left channel only, and I suspect that the other channels are muted. It hits protect as soon as I hit "Play" to check & set the mic input level for the L channel.
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Post by foggy1956 on Dec 7, 2017 15:38:58 GMT -5
True. That has me stumped since the mic is listening to the left channel only, and I suspect that the other channels are muted. It hits protect as soon as I hit "Play" to check & set the mic input level for the L channel. Odd thought, at the top of the levels screen, have you lowered the top slider and raised the lower one to achieve proper mic input and speaker output?
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Post by heroesunplugged on Dec 7, 2017 16:15:56 GMT -5
I lowered the top input gain to have a noise floor of about -18 dB max. Will try to lowering it even more. Since there isn't a volume control for the amp/subs, it may be that the amp gain is still too much, with these woofers having a rather high sensitivity of 98 dB with 1 watt @ 1 meter.
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Post by heroesunplugged on Dec 7, 2017 21:01:00 GMT -5
Alright. Does not trip if I use a standard RCA connection, but has, as best I can describe it, a white noise accompanied by some slight oscilation. The noise does not increase or decrease by changing the Gain or the Output on the initial Dirac speaker levels. My guess is that the hotter output of the XLR outputs is more than the amp likes and it goes into protect mode.
Btw, I did disconnected the speaker outputs and it trips with the XLRs regardless so it's the input of the amp that's getting a signal it doesn't enjoy. Now to figure out if this is due to an issue with Dirac LE on the laptop or something within the processor? I know most have Dirac Full. Not sure if anybody is using passive subs with an outboard amp, but I'm confident it is the processor/Dirac LE not working properly.
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geebo
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Post by geebo on Dec 7, 2017 21:26:30 GMT -5
Alright. Does not trip if I use a standard RCA connection, but has, as best I can describe it, a white noise accompanied by some slight oscilation. The noise does not increase or decrease by changing the Gain or the Output on the initial Dirac speaker levels. My guess is that the hotter output of the XLR outputs is more than the amp likes and it goes into protect mode. Btw, I did disconnected the speaker outputs and it trips with the XLRs regardless so it's the input of the amp that's getting a signal it doesn't enjoy. Now to figure out if this is due to an issue with Dirac LE on the laptop or something within the processor? I know most have Dirac Full. Not sure if anybody is using passive subs with an outboard amp, but I'm confident it is the processor/Dirac LE not working properly. Sounds like the XMC is doing something screwy. Now the obvious question: Did you reset the XMC to factory defaults and then turn it off with the switch on the back. It's basically a computer and can sometimes do odd things that a complete reset and power down can take care of.
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Post by heroesunplugged on Dec 7, 2017 21:32:43 GMT -5
No, I have not. And I use to be the one to suggest such things to co-workers! Will see.
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Post by heroesunplugged on Dec 7, 2017 21:38:16 GMT -5
Well, good idea, but still the same.
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Post by socketman on Dec 7, 2017 21:40:14 GMT -5
This is most perplexing i really thoght Geebo was on to something. There is no reason running signal to the left speaker should have an effect on the sub amp. Will it play ok on the dirac preset with a previous saved configuration? What about reversing the sub channels.
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Post by heroesunplugged on Dec 7, 2017 21:50:14 GMT -5
I think it is something in the Dirac LE software. I believe it is in full control of the XMC-1 when it connects to the processor, thereby determining which channels are muted or active.
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Post by heroesunplugged on Dec 7, 2017 22:03:29 GMT -5
This is most perplexing i really thoght Geebo was on to something. There is no reason running signal to the left speaker should have an effect on the sub amp. Will it play ok on the dirac preset with a previous saved configuration? What about reversing the sub channels. I did try each channel individually. Uploaded my settings for my M&K S100b speakers + MX-350 sub and works fine. May be isolated to the setting the Mic Gain and Output level step. Will see what happens if I ignore the noise in the subs and proceed, as if it's normal. I just won't be able to use the XLR outputs, since those render the amp inoperable.
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Post by socketman on Dec 7, 2017 22:13:53 GMT -5
ok , so if you use RCA cables all is good but you have noise.? What about using the sony for the subs and the emo for the mains?
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Post by heroesunplugged on Dec 7, 2017 22:31:36 GMT -5
Ignoring the low level noise works with the RCA connections to the SA-250. With playback, or once the file is uploaded and the XMC-1 is on it's own, the noise subsists. Not sure why the noise is present, but may be part of the "Limited Edition" that Emotiva didn't count on being used for anything more than a demonstration. Guess they underestimated how cheap I am!
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Post by heroesunplugged on Dec 7, 2017 22:50:42 GMT -5
ok , so if you use RCA cables all is good but you have noise.? What about using the sony for the subs and the emo for the mains? That's certainly an option. I will try that combination too. The e145-8s may like the Sony better anyway. This requires some changes in the speaker cables too, since the Sony uses pin connectors and the SA-250 has banana. I'll likely make that change tomorrow. The noise is always present, once I start setting the initial levels. May have been present with the MX-350, but gone unnoticed, because of the upper frequency limit. The e145-8 doesn't play as deep, but plays up to 3 kHz. So much easier to detect with these speakers.
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Post by heroesunplugged on Dec 8, 2017 0:06:22 GMT -5
There is such a difference in the output levels of the mains and the subs that Dirac has lowered the subwoofer level way too much for my taste. The difference is about 10 dB. With the Sony on the subs, I'll have some additional control with its volume.
I'll give Emotiva a call tomorrow too and see if they can assist with eliminating the noise that's being sent while calibrating.
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geebo
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Post by geebo on Dec 8, 2017 7:52:17 GMT -5
If you're getting weak bass after Dirac LE you might want to consider trying one of the mic cal files at the bottom of ansat 's signature.
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