J20/C110B Koch Jupiter Series guitar amplifier "Jupiter Junior" ATR J20/C110G Koch Jupiter Series guitar amplifier "Jupiter Junior" ATR J45/C112B Koch Jupiter Series guitar amplifier "Jupiter" ATR J45/C112G Koch Jupiter Series guitar amplifier "Jupiter" ATR J45/HB Koch Jupiter Series guitar amplifier "Jupiter" ATR J45/HG Koch Jupiter Series guitar amplifier "Jupiter" ATR ST20/C112 Koch Tone Series guitar amplifier "Studiotone" class A ST20/H Koch Tone Series guitar amplifier "Studiotone" class A ST40/C112 Koch Tone Series guitar amplifier "Studiotone XL" class A ST40/H Koch Tone Series guitar amplifier "Studiotone XL" class A CTSE12/C112 Koch Tone Series guitar amplifier "Classictone SE" CTII20/C112 Koch Tone Series guitar amplifier "Classictone II" class A CTII20/H Koch Tone Series guitar amplifier "Classictone II" class A CTII40/C112 Koch Tone Series guitar amplifier "Classictone II" class A CTII40/H Koch Tone Series guitar amplifier "Classictone II" class A TTIII50/H Koch Tone Series guitar amplifier "Twintone III" V20/C112 Koch Ventura Series guitar amplifier "Ventura" V20/C112B Koch Ventura Series guitar amplifier "Ventura" V20/C112G Koch Ventura Series guitar amplifier "Ventura" TG50/C210TW Koch Artist Series guitar amplifier "The Greg" TG50/C210BT Koch Artist Series guitar amplifier "The Greg" TLG12/C112T Koch Artist Series guitar amplifier "The Little Gristle" TLG12/C112B Koch Artist Series guitar amplifier "The Little Gristle" KCC112/BB60 Koch speaker cabinet 1 x 12" 60W KCC112/BS60 Koch speaker cabinet 1 x 12" 60W KCC112/BS90 Koch speaker cabinet 1 x 12" 90W KCC112/GS60 Koch speaker cabinet 1 x 12" 60W KCC112/BR60 Koch speaker cabinet 1 x 12" 60W KSC212OB/BB Koch speaker cabinet 2 x 12" 120W KSC212OB/BS Koch speaker cabinet 2 x 12" 120W