The Stingray Integrated Stereo Amplifier 8 x EL84 Integrated Tube Amplifier Features And Specifications: 4 x Stereo Line RCA Inputs TRIODE - UL Switching RECORDING OUT SUBWOOFER OUT TAPE LOOP (Insert) with Bypass switch Passive Noble Volume and Balance Controls All-Vacuum Tube Lo-feedback Stereo Integrated Design Output Tubes: 8 x EL84 Ships with Ei 6BQ5 Driver Tubes: 2 x 6414 Ships with GE or RAYTHEON JAN NOS USA or 6414W Input Tubes: 2 x 12AT7WA Ships with: Ei 12AT7 large plate Read the Owner's Manual