Wiim Amp vs Wiim Amp Pro - Sound Quality Differences Noticeable?

[DigitalJackson]

Researching audio quality differences between the Wiim Amp and Wiim Amp Pro but have found very little information. I thought there would at least be several YouTube videos comparing the two considering how popular the Wiim Amp is.

For anyone here who has compared the two, do the improvements (SNR and DAC) for the Pro model result in a noticeable audio quality difference?

 

[bherren]

The PFFB would make a difference with hard to drive speakers I think. The rest, well... maybe ? The differences in measurements are close to the edge of the audible range, but they are there...

 

[DigitalJackson]

The PFFB would make a difference with hard to drive speakers I think. The rest, well... maybe ? The differences in measurements are close to the edge of the audible range, but they are there...

I have a pair of Polk R100 bookshelf speakers with a sensitivity of 86 dB. Not the most efficient but definitely better than the L100s which I avoided for that reason. I already have the Wiim amp... got it as a Xmas present. Sounds good for my use of nearfield listening at my desk, but seeing the pro specs has me wondering...

 

[bherren]

By hard to drive I don't mean so much the sensitivity but the impedance curve. I think the Pro might also distort less at high power

 

[DigitalJackson]

By hard to drive I don't mean so much the sensitivity but the impedance curve. I think the Pro might also distort less at high power

Gotcha, its actually the impedance curve for the Polk L100s that makes them hard to drive... dips below 3Ω between 4 and 7kHz.
The R100's I own don't have that issue.

Curiosity has gotten me, so will probably be ordering the Pro model to compare.

 

[DigitalJackson]

Going further down the rabbit hole, I'm also now looking at the Wiim Pro Plus + a Fosi ZA3 vs the Wiim Pro amp.

What I like about the Wiim Pro Plus/Fosi ZA3 combo is the ability to upgrade the ops amp in the Fosi to something like a Sparkos Labs SS3602, but unsure what the downsides are vs the Wiim Pro amp. With the Fosi, there's also the flexibility to add another later and run them as mono amps for L and R speakers.