Amps that are (claimed) stable down to 2 Ohms without catching fire are audiophile bragging rights gear. I admit I like the idea of an amp that has that juice on tap. I have no doubts I could happily live with the Topping amps with the speakers and size of the room I have.
What about a speaker load that goes down to 3 Ohms and the operator wants/requires linearity of frequency response? What about a operator that requires lots of bass and loud output levels? What about future proofing for any speaker the operator wants to select?
What about where I said "I admit I like the idea of an amp that has that juice on tap" following the edited quote? Given the choice, I want an amp that can do 1 Ohm load and a toroidal transformer the size of a small car. That would make me happy whether my speakers require or not.
They are hardly larger than a half a shoebox with a really beasty amp.
The reason for not testing with speakers is you have how many possible speaker loads? Hundreds, thousands? The test with inductive and capacitive loads go a long way toward showing what the amp will work with. Stereophile has a representative speaker load they test with for mostly showing variations of frequency response. This amp has a .005 ohm output impedance and is going to be a straight line with it. Another factor would be speakers are nearly always the bottleneck for distortion. I think you are asking for a whole lot of useless testing. You can test with sweeps at the speaker to find amps that have significant distortion if you wish. Doing that with this amp is going to be pushing many speakers to the edge of destruction even though some seem unreasonably concerned about its power capabilities.
Interior of a Classe 25. Suitable for 1 ohm Apogee Scintilla speakers. Yes a big heavy amp with a toroidal transformer. Not the size of a car. This is stereo btw. Could be bridged for 1000 wpc mono @ 8 ohms. Not sure if it would work with the Apogee that way, but I can confirm it was good on Soundlabs bridged.
As one would expect given the prices of their products.
I meant saved the consumers money.
My entire post was hugely tongue-in-cheek
Lot of class D amps look like that due to the filtering. Some don't. I doubt if this AB Topping would look like that.
Well said! 60V and just 4A? It lacks balance between voltage and current. Forget those power bricks, put some decent PSU in the case, otherwise nice job Topping!
Do tell.
Would a PSU with a higher current capability increase the amp’s power output into lower impedances? Or is it possible that the amplifier design would not be able to take advantage of such a PSU?
Yes.
Don't know unless one tries I guess but I would not push it too hard.
This has been a godsend for me and one the reasons I bought them. My HT room is acoustically treated and has turned into my 2 channel room as well. After having been called while doing 80MPH with the top down and trying listening to my wife explain what she cant get to work while talking(screaming) over ten 7 year old girls and me screaming over my fabspeed cat back what to do... That is something I do not need to relive, ever! This way no changing profile in the AVM70. Just hit the only button on the front of the amps. Keep It Simple!
