I have a pair of Lampizator 211 mono's that run a pair of 211 per side in parallel, and I can confirm that Al and Ralph are tipping you off correctly. My 211's boast 85 watts of a tube power, but when I tried them on a speaker that dipped down to 4 ohms in the lower mid - bass range, it resulted in an anemic balance. It isn't so much about watts - - it's about proper impedance matching to achieve proper frequency response and tonal balance.
Parallel SET with sufficient power
Hello all: I'm looking to move back into SET land after 15 years. I have a pair of KEF Reference 3's at 88 dB sensitivity which I'd like to keep, so I'm considering a parallel Single Ended design with at least 30 WPC. I do like the '300B sound' so friends have recommended the 6C33c tube in parallel to deliver 30-40 WPC. I've read some very positive posts on Audio Mirror and Wall Audio of Germany was briefly mentioned. Smaller boutique like companies give me some concern as most of these fine designers or engineers build amplifiers in their spare time, and quality control may be compromised. I'm not a huge fan of 211 or 845 sound but these amps are another option. Thanks for allowing me to think out loud and I do appreciate all opinions!