I seemed to be digging into a dark hole about recommended speaker wattage. I’m not sure how much amplification I should strive for to power the Motion 60XT’s. ML recommends 40-400watts for these. Is that in 4ohms? If I got an amp that could do 700watts in 4ohms would I damage the speakers? I am interested in either Hypex or Purifi amp. Not sure between NC400, NC500, NC1200, or Purifi. Any recommendations? Thanks, Chobes
I love my headroom, my effortless highs, liquid, airy midrange, and my bass extension.
Don’t be fooled by naysayers who say 100 watts is fine, it’s not.
Just know your volume, and the sound of beginning of distortion, more speakers are blown and damaged by underdriven than having a lot of power.
My speakers (2) pairs are rated at about 20-250 W peak, as most are. My only pair of higher power speakers are old 1986 cerwin vega D-9’s at (350)w peak.
My amplifiers are McCormack mono blocks at 700 WPC, AND a stereo sunfire 600 WPC. my lowest amplifier WPC is 380wpc at 4 ohm.
Never damaged a driver, and always have amazing sound/synergy.
They are 90db, so they don't!! need a lot of wattage, a 100-150watts at into 8ohm will do. But they do have an amp taxing (for current) 2ohm dip around 200hz-400hz in the upper bass, they also have a taxing -phase angle of 65' at 70hz and also 3ohms from 70hz-150hz in the low bass. http://www.prespeaker.com/images/201702/Motion-60XT-impedance-thumb-600xauto-13547.jpg
These speakers need an amp that can do current at 2-4ohms
without breaking
a sweat right through the bass, "if you want get the best out of them." don't just buy an amp for it's big watts. No Class-D's for these if you want the very best from them.
Integrated Gryphon Diablo 120 or the 300 will both do nicely Parasound Halo Integrated Hint 6 Eariler Parasound Halo Hint
Poweramps Parasound A21+ Earlier Parsound A21 Earlier Krells etc etc.
Years back I used pro carvin amps dcm-2500 bridged and hooked me up to Altec Lansing M-510’s, 2500 W to them, amazing depth, clarity, airyness, and never an issue!
onky issue was u reliable amps.
Since then always used a minimum of 300-350WPC RMS INTO anymapeaker.
there's a mcintosh dealer here in whittier california that's been in business since the late 50's. at their store they have martin logan speakers powered by mcintosh amplifiers!
Thanks for the responses! I definitely want the headroom to power these speakers and potentially future power hungry speakers. I saw one review of the Motion60s and they used a Sunfire 300 and Silver seven so I think that basically shows higher power is fine. I just don’t understand why the power range hahaI was looking at Parasound A21s previously but I’ve been doing a lot of research on the Hypex class D and they are supposed to be phenomenal. Class D efficiency with class A sound. Read the reviews if you don’t believe me. These are what is used in high end Mola Mola, ATI and NAD amps. The problem with the Crowns and Behringers is that their power is not very clean and they have fans which are a turn off. The NC1200 almost doubles down in 4ohm and 2ohm. The THD plots are impressive. https://vtvamplifier.com/wp-content/uploads/2020/04/NC1200_datasheet_R10.pdf theres also the Purifi amp which I can find for almost the same price. Same designer who worked for Hypex. https://purifi-audio.com/wp-content/uploads/2020/01/1ET400A-Data-Sheet-1.00.pdf
Class d efficiency w class a sound is what the reviewers are paid to say when they are given free gear, and a 15K$ check for writing 4 pages on their amps.
@chobes That Purifi is a module, not a complete amplifier so unless you are planning to order it and build your own amp, your only Purifi option on the market at this point is the new NAD M33 (if it's even available yet). As far as Class D, perhaps the previous comments were true at one time in the past but I don't find them accurate with modern designs. I have a 250wpc Musical Fidelity A308cr that outputs 72 amps of current. It was replaced by a Class D Lyngdorf TDAI-3400 that is 200wpc and listed as 40 amps max continuous current. Just like in any other Class, there are many different designs of Class D amps. BTW the Parasound Hint 6 suggested above is 45 amps "peak," not continuous. I'm not much of a specs hound anyway but I guess my point is, I wouldn't abandon your ideas. Many places allow you to return so trust your ears not the wattage or current specs and don't discount Class D off-hand.
@jnehma1 there are manufacturers like Nord, VTV, and Apollon that build amps with Purifi in them. I like your idea tho, it looks like there are 30day trial periods after ordering.
@georgehifi Are you speaking from experience on class D or these models in particular, or do you know of test reports you can share that explain what you are talking about?
Yes, that’s why you need to study "independent tests" closer like Stereophile’s into 2ohm loading, and if they don’t have it you know why, they can’t handle it, complain or blow fuses. Class-D’s do well doubling wattage from 8ohm to 4ohm. But they **** themselves trying to double wattage from 4ohm to 2ohms, sometimes even going backwards Good BJT linear amps will do this, like the ones I posted about. That why I posted this to you https://forum.audiogon.com/posts/1942037 If it were correct that all you need is big wattage we’d all own $429 Behringer 3000w amps I’m not saying Class-D won’t work and sound ok into your speakers, it probably will and sound ok to you, till you hear a linear amp some day that can do 2ohms it without breaking a sweat, then you’ll understand. Cheers George
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