stereodave70
Minor Hero
My center channel !!ROCKS!! in 2.0
Posts: 68
|
Post by stereodave70 on Nov 25, 2016 21:15:30 GMT -5
Ready to try XPA 2 as monoblocks but can not seem to find another gen 1. Is XPA 2 gen 3 bridgable? And if so, how well will it run with a gen 1?
|
|
|
Post by leonski on Nov 25, 2016 23:19:34 GMT -5
nobody knows. However, IN GENERAL, I've never heard ANYONE say the bridged amp sounded better than the non-bridged version. You'll probably be better off running as BIAMP if your speakers have 2 pair of terminals w/jumper. This sort of depends on the CROSSOVER frequency which materially effects how much power each 'way' needs. The 50:50 point is near 350hz.
What is your GOAL here? Are the B&W in the SAME system as the Klipsch? If so, how could THAT possibly work well? I can't imagine a timbre match between speakers.
CNET calls the sensitivity of the RF-63s @99db. This tells me ANY good 100-a-side amp will get you evicted from the TOWN, not just an apartment or house.
The FIRST thing to look at with amp matching is GAIN. If you have a pre/pro with variable level, you may be able to do a work-around if the amps are not the same gain.
|
|
|
Post by garbulky on Nov 26, 2016 12:50:10 GMT -5
The haven't stated the gen 3 is bridgable. However the gen 3 and gen 2 are very diferent amps. The gen 3 uses XPR style blades while the XPA-2 uses XPA style blades. Bridgable gen 2 makes the XPA-2 amp 8 ohm minimum impedance - not 4 ohms.
|
|
|
Post by milsap195 on Nov 26, 2016 16:53:38 GMT -5
Have a gen 1 Xpa-2 for sale $450 plus shipping.
|
|
|
Post by leonski on Nov 26, 2016 21:34:17 GMT -5
Mislay? Your Carver can supply the HUGE filament current demand of the KT150?
|
|
|
Post by Boomzilla on Nov 27, 2016 10:20:28 GMT -5
I recommend you NOT bridge the XPA-2 amplifiers (of any generation). If you want a mono-block, BUY a mono-block. The XPA-1, Gen. 2s are still available & the XPA-1, Gen. 3 is coming soon.
Bridging amps is possible, BUT:
Bridged amps generally DON'T sound as good as the amps do in stereo mode Bridged amps get VERY particular about the speaker impedances that they're driving (and DON'T like low impedance dips) Bridged amps need to be connected differently to the speakers and if you don't know what you're doing, you can easily damage the bridged amp
"Pro" amps are made to be bridged and have a LOT of "dummy-proofing" built in. Too low an impedance, the amps shut off without damage. Wired wrong, same thing. But consumer amps (including Emotiva's) may not have all the safeguards that pro amps do. Blow your amp? Your own fault!
I'd recommend that you just biwire from a mono-block if you want more power.
Boom
|
|
|
Post by garbulky on Nov 27, 2016 11:53:14 GMT -5
Biwiring from a monoblock doesn't get you more power but I do it anyway! But I agree with B'zilla. You want a monoblock, get the XPA-1 gen 2.
|
|
|
Post by Dan Laufman on Nov 27, 2016 12:05:19 GMT -5
Don't forget the the new G3 double-wide, fully balanced mono-block modules that are coming up soon. You can build up and XPA-G3 chassis with up to three of them installed. Nice. Another option....
|
|
|
Post by leonski on Nov 27, 2016 13:44:25 GMT -5
Generally agree with Boom. Bridging? A bridge too far, as it were. Someone around here has B&W 802s which drop to 3 ohms or so. Running on a bridged amp? Sure, the amp might WORK, but you'll be into very dicey territory and even if you don't HEAR the distortion, it'll be there and you might not even know WHY you aren't likeing the tunes. Cranked up might be a different and WORSE story.
Biwire? IMO, a myth that won't go away. A good starting point for speaker cable is Low Resistance. Low Inductance, Low Capacitance. Can't have ALL THREE at once, but good measurables is a START. Tradeoffs are involved. Later, you can fine-tune for preference.
|
|
stereodave70
Minor Hero
My center channel !!ROCKS!! in 2.0
Posts: 68
|
Post by stereodave70 on Nov 28, 2016 20:10:59 GMT -5
I haven't updated that list for a long time. RF-62's went to the rears, replaced by RF-7's for mains. RB-61's for sides...for now.
Anyone know how Klipsch RF-7's will do with XPA-2's as monoblocks?....Impedance wise? Most of the time they're not at high output, but sometimes....
|
|
|
Post by leonski on Nov 28, 2016 20:28:06 GMT -5
The RF-7 II is OVER 100db sensitive. What makes you think you'd EVER need the power of a bridged amp? A KW of power would be OVER 130db peaks. And probably Ear-Damaging. Than add the 2nd speaker and subtract for distance. In any case, you are on thinner ice. Don't forget, speakers DO NOT have Watts. I've never heard a reasonable explanation of HOW 'speaker watts' are measured, either, ONE WATT over and it blows up? Max Rated for 100 milliseconds? 1 minute? Is that White Noise or somekind of 'simulated' music signal?
Have Fun and let everyone know how the experiment works out.
|
|