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Single Ended-Parallel or PP Class A Tube Amp?

Hi Guys,

Need some opinion and advise which is better in terms of warmth, sweet tone and near live sound. A Single Ended-Parallel or Push Pull in Class A amp (around 20wpc). Tube reference will be either 6L6GC or KT88. It will drive an 87dB / 8 ohms loudspeakers for jazz, acoustic and vocal music.

Thank you in advance for your inputs. :)
solp_online
5 responses Add your response
elevick
2,636 posts
 
87db is a little weak for 20 watts. It will only get you 90db@2watts, 93@4, 96@8, 99@16.
That doesn't leave much for dynamic headroom or solid bass. You will feel like you are missing something.
Single ended triode may sound the weakest. I'd go for 50+ of Pentode or ultralinear at a minimum with those speakers.
Post removed 
paulfolbrecht
603 posts
 
Whether or not your speaker has smooth impedance and phase plots and was designed for low/no-feedback tube amps are the most important pieces of information.

That and the volume level & room size.
charles1dad's avatar
charles1dad
10,250 posts
 
i agree with paul, the impedence curve of your speakers and the quaility of the amps power supply and it`s transformers matter more than a strict power requirement. Twenty quality watts should be fine and provide good bass for acoustic jazz. a good single ended amp is hard to beat with this kind of music.
Regards
solp_online OP
4 posts
 
Hi Guys,

Thank you for the informations, my room is about less 30sqm and I only listen on the ambiance level. I heard that 87dB can be driven by a 16wpc tube amp that's why I'm eyeing on a 20wpc.

I think I'd better go for at least 90dB of loudspeaker for me to fully utilize the 20wpc Class A.

Thank you once again.
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