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Post by ncred02 on Sept 26, 2013 18:31:38 GMT -5
Anyone running a pair as mono block? Im thinking of adding another and selling my xpa3 but was wondering if the improvement is worth it. Im mainly into 2channel and want some more low volume kick, if that makes sense. I find as I climb the wattage ladder my speaker sound better on the low end.
thanks
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Post by PoloOle on Sept 26, 2013 18:54:11 GMT -5
I run two XPA-2 as in bridge mode (mono). I like the setup better than using one XPA-2. Is it worth it....I don't know, but I like the look of the two amplifiers.
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Post by ncred02 on Sept 26, 2013 19:09:19 GMT -5
Im thinking of pulling the trigger on another one. May keep the xpa 3 as well. Whats the worst that can happen. I love the sound of my single xpa2 so another can't hurt.
Did you do any special electrical work?
I see your running MLs . One of my biggest regrets was selling my MLs
not that my current speaks sound bad but there's something about planars
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geebo
Emo VIPs 
"Too bad that all the people who know how to run the country are driving taxicabs and cutting hair"
Posts: 24,203
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Post by geebo on Sept 26, 2013 19:48:56 GMT -5
If your speakers have an eight ohm impedance you'll be good to go. If they're four ohms you may want to rethink it.
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mono xpa2
Sept 26, 2013 20:08:29 GMT -5
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Post by repeetavx on Sept 26, 2013 20:08:29 GMT -5
Im thinking of pulling the trigger on another one. May keep the xpa 3 as well. Whats the worst that can happen. I love the sound of my single xpa2 so another can't hurt. You could vertical bi-amp. |
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Post by ncred02 on Sept 26, 2013 21:06:51 GMT -5
Im thinking of pulling the trigger on another one. May keep the xpa 3 as well. Whats the worst that can happen. I love the sound of my single xpa2 so another can't hurt. You could vertical bi-amp. Do tell! and whats the deal with my ohms? Can the xpa2 bridged not handle it? |
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mono xpa2
Sept 26, 2013 21:41:11 GMT -5
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Post by dally on Sept 26, 2013 21:41:11 GMT -5
When you bridge an amp it can only "see" half the speakers impedance.If you have 8 ohm speakers it views them as only 4 ohms. So if your speakers are 4 ohms or less they will present a 2 ohm or lower load to the amplifier.
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Post by PoloOle on Sept 26, 2013 22:38:32 GMT -5
I run my Martin Logan without any problems with bridged XPA-2's. The XPA series have good build-in protection to shut down in case of problems......
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Post by PoloOle on Sept 26, 2013 23:22:32 GMT -5
My bridged XPA-2 setup.  |
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Post by leonski on Sept 27, 2013 0:24:25 GMT -5
Don't forget:
Speaker impedance maybe rated as 'nominal'...some average number for the speaker. They'll usually NOT tell you that an 8 ohm speaker may have dips to 4 ohms at some frequency which may ALSO need a lot of power. Say 50hz where there is a LOT of activity. Bass Guitar, Piano and drums, to name a few. I listen to 'pipe organ' which will put the hurt to ANY substandard system. Especially when you want it loud...NO....LOUDER!
Some 4 ohm speakers may take a dip to 2 ohms. Some brands....like perhaps B&W have some models which are notoriously difficult loads and need an amp which will handle it. It's not simply about 'power' but rather the ability to drive reactive loads.
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Post by repeetavx on Sept 27, 2013 1:56:35 GMT -5
For the record then; Horizontal Bi-Amping is when one stereo amp is used to drive the low frequency drivers on a pair of speakers - one amp channel per speaker. A second stereo amp is used to drive the high frequencies in the same manner. Horizontal bi amping does not require that the stereo amps be identical, but it helps if their gain is the same (however they could be chosen for their qualities driving a specific range). Vertical Bi-Amping allots one stereo amp per speaker, one channel driving the low frequencies, the other for the highs. With Vertical bi-amping the two amps must be identical. I like to think of Vertical like "stereo monoblocks", you also have the advantage of short speaker wires. As for the synergy I just meant that although I came to the same conclusion as you (that vertical bi-amping sounded best). I found that with another (better or more appropriate) amp, monoblocks sounded even 'bester' (with my speakers). I agree that testing a variety of combinations may be of more use to a larger cross section. |
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Post by garbulky on Sept 27, 2013 2:54:28 GMT -5
Is your XPA-2 currently plugged into your panamax power conditioner? Try without it direct to the wall first and see if the bass improves.
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Post by ncred02 on Sept 27, 2013 4:42:59 GMT -5
the ninkas are rated at 4ohms. they do require a lot of power to make them sing. i would not want to put a 2 ohm load on an amp constantly.
as fpr the panamax?, no the amp are plugged directly into the wall. lack of bass is not an issue. i have even removed my sub from the setup. only mis the sub during movies, which is a rare occasion
thanks for all the info!!
and POLOOLE, sweet set up!!!!!
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geebo
Emo VIPs
"Too bad that all the people who know how to run the country are driving taxicabs and cutting hair"
Posts: 24,203
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Post by geebo on Sept 27, 2013 7:22:26 GMT -5
I don't think Emotiva would recommended driving 4 ohm speakers with the XPA-2 in bridged mode. You might want to call Emotiva directly or email Lonnie or Keith.
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