2Vrms per channel would mean 2^2/32=125mW per channel.
Half of 135->67.5mW per channel at 32Ω would mean sqrt(.0675*32)=1.47Vrms.
it says:
Tempotec proved to be reliable so far and the BHD should be as good as other dual CS43131 dongles reviewed here, it seemes even more appealing than the Pro version to me due to less frills and being able to change gain manually instead of messing with firmware reflash, and 16 steps volume is not a concern in my case since i hardly would use them (I don't like at all volume buttons without a display showing at what level it is set)
Relatively new, they released it first through an unofficial Ali shop around the 11.11 discounts festival last year. I don't know how it compares for price these days but back then I thought it was crazy good because of the clean signal and the huge advertised power of 280 mW @32 ohms. Turns out that was a sum of both channels. That made it nothing-special (vs. my 100 mW much cleaner HiBy FC3) so I canceled my order.
www.audiosciencereview.com
Tempotec proved to be reliable so far and the BHD should be as good as other dual CS43131 dongles reviewed here, it seemes even more appealing than the Pro version to me due to less frills and being able to change gain manually instead of messing with firmware reflash, and 16 steps volume is not a concern in my case since i hardly would use them (I don't like at all volume buttons without a display showing at what level it is set)
At the actual price it's seriously tempting me too, even though I don't really need another dongle for my headphones.
No benefits with 3.5 out, dual is used for differential 4.4 out giving more power if needed for herder to drive headphones.
Yes, it's the same claim of the Pro version and many other dongles, surely misleading if one doesn't know if addtiional opamp are implemented that is the only way a CS43131 dongle can output more than 120mW per channel in differetial mode.
I returned it after few days since it is seriously flawed in the control system, i found various firmware with different options about volumes buttons and steps but none gave a satisfactory and reliable user experience.
Is there a spcific reason you are looking for more power? Chepaer dongles generally doesn't use an additional opamp, the only one is the KA11 but it seems to come at cost of reliablity. Previuos models where the Meizu hifi pro and Ugreen hifi pro, both discontinued, and their opa1622 could give just around 20mW more.
At 32Ω, about 35-40mW more per channel with the addition of an opa1622.
Well yes, I kept it on the safe side, referring to ~85mW with opamp vs ~65mW no opamp @32 ohms. Just to say that no cheap dongle is going more than 100mW@32 in single ended (excluding the mentioned ka11)
