When using a power conditioner, why is it advised to run amps directly to the wall?

Had a Furman IT Reference 15i and it flattened the sound with an integrated Amp. Went directly into wall and the sound perked up. Got an AudioQuest Niagara with High Current outlets and suffered no sound degradation. YMMV to be sure given equipment used. Also have a Puritan Audio Laboratories PSM 156 Power Conditioner and think it’s non destructive to transients.

Yes mcintosh customer service is great.i have 2 of the mpc 1500.each one is running the mcintosh 2 kw even though they tell you run each module off 20 amp line . So I'm using 2 20 amp lines to run the 2kw instead of 6 20 amp lines. Even though power is e x I the 120 volt line does not sag and they pull less than the 12 amp certified for mpc 1500 as they have an amp meter. I've seen the meters swing to 2kw on the amps .they have a 8kw transient but I'm sure I have not hit that yet.that might pop the 2 20 amp breakers. So call mcintosh and ask them but I have not had problems with the mpc 1500. It makes sense they have synergy with thier equipment. Yes I like the audioquest niagra 7000.look at upscale audio in california.the owner interviews the engineer and shows the internals.enjoy the search.

IMHO, the myth that amps need to be plugged into a wall plug is just that.  A myth.  Regardless of the current available,  your amp only draws what it needs.  I run a pair of Hegel H30 mono blocks, rated at 1150 watts each.  When in use, they pull about 3 amps.  Even when they need that split second "headroom", any decent conditioner can handle it.  I'm assuming of course,  that people on this site, with good systems, are not buying budget conditioners.  The concept that a conditioner  would deaden the sound of an amp, that is only using a few amps for the majority of the time, is simply counter intuitive.  But this is only MHO.  If plugging direct to the wall floats your boat, go for it.  Cheers.

Do you think today’s higher quality power conditioners manufactures are going to build a product that is going to suppress high current power?  Why suppress sales? Engineers can work the problem out. That’s why they are on the payroll.

Simaudio recommended I plug my Moon amp directly into the wall. 

ChatGPT had a slightly different recommendation based upon the quality of your power. : 

Try both and trust your ears — but here’s the practical guidance:

• If your power is stable and clean: Plug the Moon 330A directly into the wall, preferably into a high-quality outlet (hospital-grade or audiophile-grade).
• If your power is noisy or voltage varies: Use the Furman P-2400 AR. It’s one of the few conditioners designed not to choke amps.