[Tyson]

EL84 and his 2W are not usefull as EL34 and 6W, but it yet cheap.
There is other tubes that delivery more power with good sound as KT88 and KT90(10/12W in SET).

You should be able to get 5 watts from an EL84 run single ended, and 20 if you run them push-pull.

I have run high powered pentodes in my amp and you are right, the KT88 (or 6550) can sound amazing run single ended.  Although for my money, the slightly lower powered KT66 beats them all, for pure sound quality.  Love that tube - big, bold and great tonality. 

[FullRangeMan]

You should be able to get 5 watts from an EL84 run single ended, and 20 if you run them push-pull.

I have run high powered pentodes in my amp and you are right, the KT88 (or 6550) can sound amazing run single ended.  Although for my money, the slightly lower powered KT66 beats them all, for pure sound quality.  Love that tube - big, bold and great tonality.

It should be 5W in UL, in Triode its around 2W conservative.
I dont like UltraLinear amps, if a tube dead in UL mode usually other parts are damaged, it run the tube in hi power area.

[opnly bafld]

It should be 5W in UL, in Triode its around 2W conservative.
I dont like UltraLinear amps, if a tube dead in UL mode usually other parts are damaged, it run the tube in hi power area.

FWIW
The Vaughn Carina is 3.5 watts U/L; the Grommes PHI-26 was rated at 2 watts triode and 6 watts pentode with an 8 ohm load.

[Tyson]

FWIW
The Vaughn Carina is 3.5 watts U/L; the Grommes PHI-26 was rated at 2 watts triode and 6 watts pentode with an 8 ohm load.

I like how Decware says the EL84 amp is 2 watts stereo and 6 watts mono, whereas all other tube amps that I'm aware of only double output at best when used mono.

Maybe they run them single ended parallel when in mono config.

[opnly bafld]

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[ZENTISH]

  When mono-blocked the Decware SE84 zen amps are series strapped, and they put out more power as ohms are decreased,unlike most other single ended amps.