Guidocorona, you may be thinking of the INPUT impedance of the Rowland 312. Usually, power amps’ output impedances are very low, hopefully below that of the speakers--especially for SS amps.
If the Rowland 312 is a Class D or switching amp--and I believe it is, the manufacturer may be quoting the figure in a different way because of the different topology. The Rowland site does not list the impedance figures of the 312 under products, 300 series---unless I missed it.
Typical tubes amps use transformers to lower their output impedance below that of the 4-8 Ohm speakers they usually have to drive. Atmasphere amps are, of course, different (being OTL's) and do necessitate being mated with a bit higher impedance speaker than most “normal” amps do. SET amps also have their impedance limitations.
A 100K Ohm amplifier output just sounds wonky to me.
If the Rowland 312 is a Class D or switching amp--and I believe it is, the manufacturer may be quoting the figure in a different way because of the different topology. The Rowland site does not list the impedance figures of the 312 under products, 300 series---unless I missed it.
Typical tubes amps use transformers to lower their output impedance below that of the 4-8 Ohm speakers they usually have to drive. Atmasphere amps are, of course, different (being OTL's) and do necessitate being mated with a bit higher impedance speaker than most “normal” amps do. SET amps also have their impedance limitations.
A 100K Ohm amplifier output just sounds wonky to me.