Vitus versus Gryphon

nasaman OP
I bought the integrated Ri-100.
It’s so impressive... I’m saving up for a bigger one

Hmm! you will go round in circles.
Try the Gryphon Diablo 300 before doing that, as that will also drive your SF’s nasty bass load impedance better than either Vitus, as it’s also the same mono’d stereo configuration as the 100.

Realize that you do don’t need any more wattage as the SF’s are 91db!!!!! effecient, you need current, low damping factor and low impedance stability.

mono’d stereo configuration (gives more wattage)

This is what the SF’s don’t need

However, it also means twice the distortion and twice the output impedance (and therefore half the damping factor, half the current less low impedance stability).

Cheers George

Nasaman

congratulation! Please use balanced cable as much as
possible, it will be better.

Nasaman, congrats on your purchase!

Georgehifi,  you stated above you didn't know the specs of the Vitus products, not sure it's fair to give advice relying on Vitus's website marketing/specs.

While the Diablo 300 is an amazing and powerful integrated, the Vitus products have some of the most enormous power supplies around.

Vitus has a unique sound signature and if he loves the RI-100, then I have absolutely no doubt he would love the RI-101 and up even more.  The SIA-30 has a similar power supply as their Masterpiece 4 piece mono blocks.

The Vitus was so good, I could not even leave my listening chair with many attempts.
I’m A/B’ing XLR and RCA right now. With my type of music, my gear and room, RCA always come out top for the last 15 years but this Vitus.... XLR came out slightly cleaner and more enjoyable and they’re lower grade than the RCA. All cables from Purist Audio. Thanks all

The Vitus was so good, I could not even leave my listening chair with many attempts.

Yet you said this after a couple of days, I must ask why??? if it was so good.

Ri-100.
It’s so impressive... I’m saving up for a bigger one

With 91db speakers you have much more than enough wattage from the ri-100 (300w!!!!). More wattage will bring nothing to the table as they are still bridged amps.

Georgehifi, you stated above you didn’t know the specs of the Vitus products, not sure it’s fair to give advice relying on Vitus’s website marketing/specs.

You obviously did not see that later or have no idea, I found they are bridged amps, and when amps are bridged they are not the best into the kind of load OP’s Sonus Faber’s bass loading have.
https://www.stereophile.com/images/archivesart/1207SFEfig01.jpg

Cheers George