Tech Talk - Marble Max Amp (2006)
input, volume & tone 1x8 MARBLE Bluetone C8H25 speaker poweroutput: 7,5 watts (6W RMS at 8 Ohm) dimensions: 34 x 29 x 20 cm, weight: 7 kg pre-amp: 1x 6SL7GT or 12AT7NOS power-amp: 1x 6V6GT or 5881 rectifier: 1x 5Y3GT The circuitry is based on the tweed Champ designs with a single ended class A output section. Special transformers are developed to accept a 6V6 as well as a 6L6 powertube. The 6V6 is sweeter and rounder, the 6L6 will give better low end and can be used in combination with a 5AR4 rectifier to produce more than 10Watts. The pre-amp operates with an old style 6SL7GT tube but can be modified to a more conventional 12AT7NOS. AJ: "The 6SL7GT’s have a nice round and warm tone for clean as well as overdriven sounds. The 12AT7 has a stronger more detailed midrange focus, and has the advantage of being interchangable with the 12AX7 for maximum gain or the 12AY7 for more vintage tone". The powersection uses a 5Y3GT rectifier tube for the right amount of...