you can buy EL156 monoblocks in PUSH PULL mode , 2x60 watts power a REAL NEUMANN LV-60 KILLER(you can see my NEUMANN LV-60 amplifier, which was the base, I had to built a BETTER and modern KILLER amplifier!)EL156 IS ONE OF THE BEST TUBE in the world,made by telefunken in the golden ages, and was used in a lot of PRO. amps, made byKLANGFILM, SIEMENS, TELEFUNKEN, and the legendary NEUMANN cutting LATHE the LV60.the EL156 made by telefunken for a 10.000 hours lifetime. My opinion the OLD german AUDIO tubes much better than new chinese CULT tubes (300B, 211, 845)The tubeguru.hu are building High Quality tube amplifiers and we prefer the OLD german AUDIO tubes!the MAIN IMPORTANT IS DEVELOPING+WATCHMAKER HANDBUILD.This is an AMAZING EL156 Push Pull Tube Amplifier, The Output transformer Give a very deep Bass!like a jewel! I can tell you,-very hard to build better:-) you can see the pictures of the test and in all measurement kill the famous japanese amps!Spec: The Names Tells everything for Tube Expert:) Output Impedance: 4-8 OHM Frequency response: 10Hz-45.000HzOutPut Power:2x60 Wattsthe Power transf. 550watts Input terminal: XLR and RCA Output (speaker) banana *Special 550 watts ! HQ. C core output transformers, (spec. designed for EL156)* *EF804 Telefunken driver Tubes ** OLD Siemens Capacitors*https://youtu.be/hUysgp1yflw _gsrx_vers_1516 (GS 9.3 (1516))