I currently have a Yamaha WXA-50 which is an integrated amp with DAC and streaming features in a small form factor.
Mobile App, feature set, power consumption... everything is fine.
Except that it replaces a Rotel 2x40w amp and despite the better power figures of the Yamaha (2x55 @8/ 2x105 @4), it doesn't sound as good as the rotel.
It lacks some oompf or i would say... I want to push a little further.
As I like the features and access of the Yamaha, i'm considering the pre-amp version of it, the WXC-50.
To which - here's the point of my post - I'll connect an amp from Nuprime.
So, I'm hesitating between the STA-6 and STA-9.
Both will match the form factor of the Yamaha and I don't need XLR outputs.
The thing is only STA-6 has trigger input so when i decide the Yamaha will go to sleep, the STA-6 will too.
It might save me 20 to 30$ a year. Not giant money but i kinda like the idea to switch both off at the same time.
The STA-9 will be always on, as the access to the rear is difficult and I don't want to make it more complex to start up for the wifey. TV sound output goes to the Pre-Amp/Amp all the time.
Advantage of the STA-9 is the little additional power, 35w per channel exactly.
All the Internet is talking about how much an amp can deliver current. And it's something that isn't listed anywhere.
And I'm trying to understand what would be the current/real world power difference between the two.
My actual speakers are easy to drive, bookshef format with 90db on 8ohms.
But I'm considering changing for Dynaudio bookshelves with 85db on 4ohms.
Listening to medium volume in my 30 square meter living room.
- Can we deduce the current capability of the two amps by looking how much the can produce power in mono mode ?
because when the difference is like +40% for the STA-9 in stereo, it goes up to +80/90 in mono. That's a big step up.
- Is there a toroidal power supply underneathe the metal protection on the right side of the STA-6 ?
Can we have a picture of what's under this plate ?
I don't think the difference in warmth is important to me.
Thanks for your comments