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Compared to a real EL156? I don't know why I am giving it two stars let alone 3. The real EL156 is a 60,000 hour rated cinema, and studio reference amp valve developed by Telefunken. Shu Guang did okay, but the tone & longevity just is not there, and you will need to swap out your 10 pin European sockets for octal sockets. Good luck ramming 880 volts into these too. I have real Telefunkens and a Telefunken 100 watt per ref amp. These sounded okay in it, but the Telefunkens are hands down, way better. These do not cost $600 a pair, either, so ..... Good luck finding transformers to run these, if you want to build an amp that uses them. I have a cathode biased 88 watt Twin that used 1 pair with 640 volts on the plates and 10K5 CT OT. The transformers were made by Edcor, and the amp sounds great. The Chinese EL156s are a different flavor than the German ones, and they fare okay, until I made a fixed bias amp with 8700 ohms CT @ 840 volts anode to produce 150 watts from a single pair with 3 pairs each running its own cab with two 18" bass speakers, and a horn. I took the Telefunkens out to sell it. It goes through these Chinese valves every 6 months or so, but it is stupid loud. If I were comparing these to Telfunkens they might get half a star. There is nothing else to compare these with. Hammond made a 300 watt OT that will work, if you use 3,6, or 12 speakers, and run into the 11-12 ohms into a 2 ohm tap. Sterling made OTs for the EL156. Those are 150 watt hi fi OTs. An SVT OT will also work with 6 or 12 speakers. The Chinese El156 valves hold up better than expected.
