You will have more class A output power, but less overall power. You can also use 4ohm speakers on 8ohm taps to reflect a lower impedance onto the tubes so the 8K would appear as a 4K.
The KT88's drive ability will be wasted or not utilized, you could substitute lesser valves like the Russian 6P3S depending on B+. Other tubes that can easily drive 8KRaa would be the 6P3-E, 6L6GC, 5881, EL34 and the larger tubes, KT66, KT77, 6550, KT88.
The KT88's drive ability will be wasted or not utilized, you could substitute lesser valves like the Russian 6P3S depending on B+. Other tubes that can easily drive 8KRaa would be the 6P3-E, 6L6GC, 5881, EL34 and the larger tubes, KT66, KT77, 6550, KT88.
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