More power for moderate listening levels?

86 db sensitivity 25 wpc amp? LOL Do you have a buddy with Parasound, A21,23.  Something like that. Krell 100 or 250 wpc, Mark L will push those puppies.. If you want a pitch black background, some type of class d. They are 1/3 the cost of the Pass but 25 X the power.

Not only will they power your speakers, you can see for yourself, without all the bluster about less efficient speakers. BLA BLA BLA...

NOT twice as much 25 times as much..... BUY a bigger amp..

25 watts per channel is 25 watts per channel

If you you want to one up that, Treat as much of the room as you can stand.  I like as little room treatment as possible.

Those are great sounding speakers, with accurate factory measurements.  86 is just fine with todays amps that are from 2-2000 watts, EASY 2-3-4000 WPC not uncommon. No need to scrimp..

So were are clear, I own Pass, First Watt, and two kits I built... and at least 3 pairs of speakers that are 84%.. They can sound up
50 X 50 X 15 dance floor to over 100 db... CLEARLY... Zero floor noise zip nada..... That's with an old vinyl rig too (Russco) and a C20 Mac.

25 wpc? At least it's a good 25 watts... NOW 250 or better...

Regards

Here's the thing.. That  Mack and that Porsche both have close to the same horsepower, and torque.. Look them up you'll see. 2-500 hp with
1-2000 foot lbs of torque..  The difference is the size of the parts..... 
Foot lb of torque... BIGGER

Same thing with speakers, it's where the speaker starts to distort not how efficient it is. The E factor is rather arbitrary, IF the distortion is LOW and reproduction is correct, Audiofile or not.... That is my end of the line goal.

If I can reproduce quality sound from 40db to 115db, I'm a pretty happy soul.  I don't use my ears either.  I've found if you don't run sound test, and collect your own data, your wasting your time..

When I mentioned the 84% speakers, the factory was 89 or 91.. THEY aren't usually accurate, and it's REAL easy to fudge the measurements.

Bigger amp, treat the room... You want to make sure to run some test and see if its running out of gas, and distorting... Pass is not the end all amp it's made out to be.. It is a great amp though.. I like Ampzilla, Serious amp, there. Hook a single 2000, up.. You'll see.. Compare the two..
Wish I would have never sold them...:-( You could have turn them up until your ears bleed, with those speakers... 25 watts is 25 watts plane and simple.

Regards

If I measured them they would be different again. As I said, I've seen a LOT of fudging and manipulation, of the numbers. How that mic is held what it is held with, background noise, I've seen some weird stuff to get NUMBERS. Wiring out of phase is real big.  Listen to the difference, when the mids are NOT wired out of phase... and when just one of three (EX; mid drivers) is wired out of phase, the number look good but  they sound "FLAT" because they are, they measure flat...

Tekton does not wire out of phase.... I don't know Mr. Pass views on  crossovers, but I do have one of his hand built First Watt  OXO.  Nothing more than 18 db XO, more like 6 and 12 db.. His amps are going to reflect sounding better, with a lower order XO, too.. Those long slopes help a lot when it comes to power demand...and lower watts.

24, 48 db slopes, and any low watt amp, the amp will labor, AND run out of gas.  Even if the E factor is high.... 25 watts is 25 watts..I have to look up the specs on the speakers...I have a hunch about the crossover...I just wonder if it is in the specs without, looking at the actual crossover.

Regards..

If you go about it bassackwards as Chucky says you’re in for trouble.

<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>

A laugh a minute.. If you know your equipment you buy accordingly..
MC knows his equipment..  Low watt amps 1st and second order XOs and well matched drivers with HIGH E factors, are a match made in heaven. Pass and Tekton are just that..

Power amps are rated by class. Class A, AB, and D are probably the most common.  There are valve amps that are pure class A, AB the same as SS but class Ds I seen hybrids of tube front ends and class d power amps..

Class A Amps run wide open, as you increase the power they actually cool down, AB is both usually, A up to a bias point and then AB from that point on.. Then it will create more heat....than the actual set class a bias point.. I'm sure someone will chime in all tec like.. LOL Me I'm just al ol mechanic...BUT that is the just of it...

So you could feed the world on circumcision soup, too, YUM ME!!

Get along now, come back for a second bowl of soup., any volunteers?

Regards..