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Thread: XPA-3 Question

  1. #1

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    Default XPA-3 Question

    if i am only using it for my RTi A9's am i getting 250 watts per channel? am i understanding this right?
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    I think it's either 225 or 250. Check the website.

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    Quote Originally Posted by TOOLFORLIFEFAN View Post
    if i am only using it for my RTi A9's am i getting 250 watts per channel? am i understanding this right?
    It depends on the impedance of those 9's.

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    8 ohm rating:
    3 channels - 8 ohm = 200 watts per channel
    2 channels - 8 ohm = 225 watts per channel
    1 channels - 8 ohm = 300 watts per channel

    This is straight from the Emotiva website...http://emotiva.com/xpa3.shtm

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    Are you going to run center off the amp?

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    For the little difference that would be made, I'd be running the fronts and center off of the amp. That would give you a much better overall front soundstage. The extra 25 watts per channel you'd get by just powering the fronts wouldn't make to huge of a difference.
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    Quote Originally Posted by comfortablycurt View Post
    For the little difference that would be made, I'd be running the fronts and center off of the amp. That would give you a much better overall front soundstage. The extra 25 watts per channel you'd get by just powering the fronts wouldn't make to huge of a difference.
    I have it hooked up with the center as well. i was just curious if i was understanding it right, if you were to only use 2 channels you would be getting more watts.

    Thanks.
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    Having the front 3 speakers on the amp is the way to go.But I have to ask,why the concern over 25 watts?? I'm hopeing you don't think they will play louder,do you?

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    Quote Originally Posted by tonyb View Post
    Having the front 3 speakers on the amp is the way to go.But I have to ask,why the concern over 25 watts?? I'm hopeing you don't think they will play louder,do you?
    No concern, i would'nt run it w/o the center. was just wondering if thats the way it works. wanted to know if i was understanding that it works that way.
    so does the same work for my receiver since my amp is powering my center and two mains as well? since i am new to having an amp just wanting to learn some things that is all.

    Thanks for the help.
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    3 channels driven = 200 wpc, if you were only to drive the 9s without the center then that would be 2 channels driven = 225 wpc. Also since you have added an external amp be sure to allow the AVR to auto cal again or use a radioshack SPL meter to bring all channels to an even level @ 75 db or THX recommended 85db.
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    Quote Originally Posted by Sherardp View Post
    3 channels driven = 200 wpc, if you were only to drive the 9s without the center then that would be 2 channels driven = 225 wpc. Also since you have added an external amp be sure to allow the AVR to auto cal again or use a radioshack SPL meter to bring all channels to an even level @ 75 db or THX recommended 85db.

    This is something that I've never understood. Why is 75dB the magic number? Doesn't that number have a lot to do with volume your AVR is set at? Wouldn't it be good advice just to have all the number the same, not necessarily 75dB or 85dB? Just a question...
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    You're not really pushing more wattage, you're getting more available dynamic headroom--just more potential power available if the speakers demand it.
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    Quote Originally Posted by mmadden28 View Post
    You're not really pushing more wattage, you're getting more available dynamic headroom--just more potential power available if the speakers demand it.

    OK, that sounds good to me...now how is that done? I have an SPL meter, so I assume that it's pretty easy. Where would I put the volume on the AVR to start? Right now I had the Yamaha on -30dB and set the SPL to ~63dB. On these settings, my speaker levels won't go high enough for me to get into the 75 dB range.

    Thanks in advance

    I apologize for the thread jack, this just really has me interested now!
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    Quote Originally Posted by sdcfan18 View Post
    OK, that sounds good to me...now how is that done? I have an SPL meter, so I assume that it's pretty easy. Where would I put the volume on the AVR to start? Right now I had the Yamaha on -30dB and set the SPL to ~63dB. On these settings, my speaker levels won't go high enough for me to get into the 75 dB range.

    Thanks in advance

    I apologize for the thread jack, this just really has me interested now!
    Don't worry bout the jack im very interested as well.
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    Basically 0 is @ reference level for the receiver. So set the receiver to 0 then run the test mode & make adjustments to the volume through your receiver until all your speakers are around 75-80 by the spl meter.

    That way all will be matched & the sound will be cohesive. The odds of you listening to a movie at reference level is slim to none.

    Usually what I find is that the L/R speakers are already there, but I have to tweek the center & back channels to get them up to reference.


    Quote Originally Posted by sdcfan18 View Post
    OK, that sounds good to me...now how is that done? I have an SPL meter, so I assume that it's pretty easy. Where would I put the volume on the AVR to start? Right now I had the Yamaha on -30dB and set the SPL to ~63dB. On these settings, my speaker levels won't go high enough for me to get into the 75 dB range.

    Thanks in advance

    I apologize for the thread jack, this just really has me interested now!
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    Thanks! Just finished making the adjustments, they were pretty easy, lol.

    Another question related to this. I understand that I will almost never get the volume to 0dB on the AVR (just tried it and I've NEVER listened to them that loud). That being said, I was always told that turning your AVR up to the dB's on the + side was a major no no. I was told that going past 0 wasn't good for your speakers or AVR. Now that I'm using the Emotiva, does that rule still apply? Am I going to hurt anything by going over 0?
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    Most likely you will eventually hurt your ears!:D That is the whole point of calibrating your speakers by adjusting all of them to reference level internally, you more than likely won't have to ever hit your volume button until you get to 0! I trust that you set the meter to the closest number you have to reference level.

    Quote Originally Posted by sdcfan18 View Post
    Thanks! Just finished making the adjustments, they were pretty easy, lol.

    Another question related to this. I understand that I will almost never get the volume to 0dB on the AVR (just tried it and I've NEVER listened to them that loud). That being said, I was always told that turning your AVR up to the dB's on the + side was a major no no. I was told that going past 0 wasn't good for your speakers or AVR. Now that I'm using the Emotiva, does that rule still apply? Am I going to hurt anything by going over 0?
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    Quote Originally Posted by cfrizz View Post
    Most likely you will eventually hurt your ears!:D That is the whole point of calibrating your speakers by adjusting all of them to reference level internally, you more than likely won't have to ever hit your volume button until you get to 0! I trust that you set the meter to the closest number you have to reference level.
    You had me until you got there. What do you mean? Sorry!:o
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    OK you set your meter to the closest # that is the reference level. My RS meter gives increments of 10, so I set it at 80. Then I ran the test tones for the speakers & make adjustments as needed.

    My left speaker was right on the money. my center channel had to go up 1 notch, my right channel had to come down a notch. & my sub had to come down a notch. I will have to rerun it when I finally get my back speakers hooked up again.
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    Quote Originally Posted by cfrizz View Post
    OK you set your meter to the closest # that is the reference level. My RS meter gives increments of 10, so I set it at 80. Then I ran the test tones for the speakers & make adjustments as needed.

    My left speaker was right on the money. my center channel had to go up 1 notch, my right channel had to come down a notch. & my sub had to come down a notch. I will have to rerun it when I finally get my back speakers hooked up again.

    OHHHHH!!!!!!! Gotcha. Yeah, I set my SPL to 70, but the display read 75 once I changed the AVR settings.

    Thanks again!
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    OK,

    Let's say you have an Onkyo 800 series and you have your 8 pre-outs. If you were to buy an XPA-3 you would power the L/Center/R channels with the XPA-3 right. Then you'd be left with the other 2-4 channels. You would wire those to the Onkyo which has less power--would that be a problem in balancing the surrounds with your fronts--

    I assume not because a lot of people seem to be running such a configuration?

    cnh

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    Yes the Onkyo has less power, but you should calibrate all of your speakers once you get the amp & everything would be matched to output the same volume.
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    Quote Originally Posted by cfrizz View Post
    Yes the Onkyo has less power, but you should calibrate all of your speakers once you get the amp & everything would be matched to output the same volume.
    Thanks,

    That sounds right. Now all I have to do is save for the extra amp! All of you have sold me on these Emotiva amps!

    cnh

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    Quote Originally Posted by cnh View Post
    Thanks,

    That sounds right. Now all I have to do is save for the extra amp! All of you have sold me on these Emotiva amps!

    cnh
    Its really a nice buy for the money. I just got my Xpa-3 two days ago, and noticed a marked difference in sound quality from my front 3. The sale ends monday for the Xpa-3, but a new sale begins for the Xpa-2 at $719 and Upa-2 at $269, With free shipping included. If you can swing any of them i think you will be impressed.
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    Retro,

    The new sale starts Monday? I am considering the XPA-3 and UPA-2. I am more leaning to the UPA-2 for now since I'll only be running 2 Chan for now. Then I figured later this year I can pick up the xpa-5. If a sale starts on the UPA-2 on Monday then I'll wait a few days to order :)

    The UPA-2 is 185w x2 at 4ohms. Anyone think this will be fine for a pair of LSi9's? Trying to watch my money for now :) I know I could go with the XPA-3 and then add to it later as well. But something tells me when I actually complete my HT, I'll just want the XPA-5 running it.

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    Quote Originally Posted by metal83 View Post
    8 ohm rating:
    3 channels - 8 ohm = 200 watts per channel
    2 channels - 8 ohm = 225 watts per channel
    1 channels - 8 ohm = 300 watts per channel

    This is straight from the Emotiva website...http://emotiva.com/xpa3.shtm
    I found out that this is actually an error on their website according to Emotiva, it's actually.......
    2 channels - 8 ohm = 250 watts per channel.
    Last edited by metal83; 01-30-2009 at 01:44 PM.

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    They are selling an XPA-3 for 5 bills...damn that sounds like a pretty sweet deal
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    Quote Originally Posted by Mike Reeter View Post
    They are selling an XPA-3 for 5 bills...damn that sounds like a pretty sweet deal
    Buy one before the price goes back to $650...:D

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    Quote Originally Posted by metal83 View Post
    Buy one before the price goes back to $650...:D
    I'm very tempted to do just that.I have an Adcom 5503 (200x3) powering my RTi12's and CSi5 center.

    I just like the looks of the Emo's.
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    Quote Originally Posted by parasomia View Post
    Retro,

    The new sale starts Monday? I am considering the XPA-3 and UPA-2. I am more leaning to the UPA-2 for now since I'll only be running 2 Chan for now. Then I figured later this year I can pick up the xpa-5. If a sale starts on the UPA-2 on Monday then I'll wait a few days to order :)

    The UPA-2 is 185w x2 at 4ohms. Anyone think this will be fine for a pair of LSi9's? Trying to watch my money for now :) I know I could go with the XPA-3 and then add to it later as well. But something tells me when I actually complete my HT, I'll just want the XPA-5 running it.
    Yes got this info off the Emo forum. I dont know much about the LSi9's other than the fact they love power. Think the Upa-2 would hold you over fine until the Xpa-5 comes back into stock at the end of february. 185w x 2 into 4 ohms will be better than any A/V receiver can offer. You can always sell off the Upa-2 when your ready for the Xpa-5.
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