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Forum: Receivers, Amps, and Processors   03-31-2015, 03:04 AM
Replies: 199
Views: 5,262
Posted By kbarnes701
Scott, I think you need to develop more...

Scott, I think you need to develop more understanding of how this all works. To calibrate properly one needs to use all 9 mic positions sequentially so that Dirac can build a picture of the room,...
Forum: Receivers, Amps, and Processors   03-31-2015, 02:52 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
What makes that UPS suitable for power amps? I...

What makes that UPS suitable for power amps? I know nothing about UPS - this one has a VA of 700 and Watts of 400. Is that enough for 4 power amps - the 300 watt (into 4ohms) XPA-3, the 150 watt (8...
Forum: Receivers, Amps, and Processors   03-31-2015, 02:45 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
That's OK. AFAIC the 88A is transparent. Nobody...

That's OK. AFAIC the 88A is transparent. Nobody has posted any evidence which shows that it isn't. If you have some, please post it. Otherwise you are saying I am just 'believing' that the 88A is...
Forum: Receivers, Amps, and Processors   03-30-2015, 12:13 PM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
Have you come to the conclusion that it isn’t?

Have you come to the conclusion that it isn’t?
Forum: Receivers, Amps, and Processors   03-30-2015, 12:11 PM
Replies: 199
Views: 5,262
Posted By kbarnes701
Are you deliberately misinterpreting? The point...

Are you deliberately misinterpreting? The point with the measurements I posted is that the mic never moved.
Forum: Receivers, Amps, and Processors   03-30-2015, 12:08 PM
Replies: 199
Views: 5,262
Posted By kbarnes701
How does that help with the variable height of...

How does that help with the variable height of the mic positions? The fact you can't come up with a way to do this shows that, contrary to your assertions, it is far from easy.



It doesn't...
Forum: Receivers, Amps, and Processors   03-30-2015, 11:10 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
If anyone was contemplating getting the Emotiva...

If anyone was contemplating getting the Emotiva XMC-1 and using it instead of an 88A for Dirac Live, then this may be of interest.
...
Forum: Receivers, Amps, and Processors   03-30-2015, 11:05 AM
Replies: 199
Views: 5,262
Posted By kbarnes701
No if I say so - if everyone says so. Move the...

No if I say so - if everyone says so. Move the mic between measurements, the graphs will be different.
Forum: Receivers, Amps, and Processors   03-30-2015, 11:05 AM
Replies: 199
Views: 5,262
Posted By kbarnes701
How do they ensure it is in the same spot every...

How do they ensure it is in the same spot every time? I guess they could suspend a golf ball on string from the ceiling so that it is where the tip of the mic is. And then repeat it for the other 8...
Forum: Receivers, Amps, and Processors   03-30-2015, 11:03 AM
Replies: 199
Views: 5,262
Posted By kbarnes701
They all chose not to because the results would...

They all chose not to because the results would be useless unless the exact same mic positions can be repeated. If the mic moves, the graphs will be different before and after, so it would be...
Forum: Receivers, Amps, and Processors   03-30-2015, 10:57 AM
Replies: 199
Views: 5,262
Posted By kbarnes701
They do? People are all the time replicating mic...

They do? People are all the time replicating mic positions when they use REW? That is news to me, and I've been a REW (and OmniMic) user for ages now.




You don't have to believe it. You can...
Forum: Receivers, Amps, and Processors   03-30-2015, 10:50 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
Thanks Roger. I may add a rackmount UPS just for...

Thanks Roger. I may add a rackmount UPS just for the 88A. For just the 88A, a relatively inexpensive one will do. I imagine almost any would power the 88A for ages. I don't think there's anything...
Forum: Receivers, Amps, and Processors   03-30-2015, 10:47 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
Not sure what you mean here. I have no doubt...

Not sure what you mean here. I have no doubt about the transparency of the 88A. The additional ADA conversion is irrelevant to anything audible IMO.



Just reiterating my position. If I believe...
Forum: Receivers, Amps, and Processors   03-30-2015, 08:34 AM
Replies: 75,066
Views: 6,310,363
Posted By kbarnes701
That is the response that Audyssey sees from your...

That is the response that Audyssey sees from your speakers, taking into account their interaction with the room. I'd suggest raising them somewhat to take the strain off them and put it on to the sub...
Forum: Receivers, Amps, and Processors   03-30-2015, 08:32 AM
Replies: 75,066
Views: 6,310,363
Posted By kbarnes701
Thanks for the hat tip but most of the Sub...

Thanks for the hat tip but most of the Sub Distance Tweak Guide is the work of other people, as acknowledge in the guide. What I did was bring it together all into one place. Glad you found it useful!
Forum: Receivers, Amps, and Processors   03-30-2015, 08:27 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
Often enough to be comment-worthy. And of course...

Often enough to be comment-worthy. And of course it is brought up all the time all over AVS in connection with anything that has an ADA conversion.



I've already decided that an additional or...
Forum: Receivers, Amps, and Processors   03-30-2015, 06:19 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
Hmmm. Maybe UPS isn't something I need then. I...

Hmmm. Maybe UPS isn't something I need then. I see the benefit with the DVRs for sure - mine take 5 minutes to reboot too. But they aren't in the HT system so I don't really care. And I don't watch...
Forum: Receivers, Amps, and Processors   03-30-2015, 06:14 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
Thanks!

Thanks!
Forum: Receivers, Amps, and Processors   03-30-2015, 05:48 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
Thanks. That is what I suspected. In that case,...

Thanks. That is what I suspected. In that case, if I go this route I need to omit the power amps.



The problem is that it will need a redesign of the rack. Currently (NPI) the rack has its own...
Forum: Receivers, Amps, and Processors   03-30-2015, 05:22 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
I spent some time over the last day or two...

I spent some time over the last day or two experimenting with different target curves. Dirac software makes this a very simple and quick task so it is easy to try different things. I have managed to...
Forum: Receivers, Amps, and Processors   03-30-2015, 05:18 AM
Replies: 199
Views: 5,262
Posted By kbarnes701
+1.

+1.
Forum: Receivers, Amps, and Processors   03-30-2015, 02:56 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
Thanks. Good point about momentary power drops....

Thanks. Good point about momentary power drops. We almost never get lightning or unexpected power cuts here. Are there any downsides to running the gear from a UPS? Will power amps be OK for...
Forum: Receivers, Amps, and Processors   03-30-2015, 02:51 AM
Replies: 3,158
Views: 83,515
Posted By kbarnes701
It is often brought up as a negative of the 88A...

It is often brought up as a negative of the 88A box. People do worry, needlessly, about it. Like any minuscule difference between DACs is going to be more important than correcting the huge...
Forum: Receivers, Amps, and Processors   03-30-2015, 02:46 AM
Replies: 199
Views: 5,262
Posted By kbarnes701
A one-spot calibration is useless so what would...

A one-spot calibration is useless so what would be the point of 'verifying' it afterwards?



What you can do is make a Dirac measurement from one spot and then, without moving the mic, do a REW...
Forum: Receivers, Amps, and Processors   03-30-2015, 02:40 AM
Replies: 199
Views: 5,262
Posted By kbarnes701
Can't replicate the mic positions very easily or...

Can't replicate the mic positions very easily or very accurately, so it makes the exercise less than useful.
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