There are pre-class output, can be used as an independent pre-class active monitoring or pure after the class. After the amplifier circuit with its own use for many years the whole division of a class line.The discrete devices only need to consider their own performance alone, so just for a device, less a lot of application restrictions, it can give full play to the performance of a single component.Because unlike integrated circuits that are integrated in the chip can not be separated and changed, the use of discrete devices is more flexible, you can freely adjust the parameters of each level, to achieve the best working condition.But also because it is more developable, and for the distortion of the part is also relatively controllable, can give different circuit architecture to bring more variable sound style. The disadvantage of discrete devices is that the distribution parameters of great impact on the design and debugging becomes very difficult, need to have some technical experience and a long debugging process.In terms of consistency is also relatively weak, so the material needs to be very elegant. Each channel using two pairs of 8 pairs of power chip, to ensure adequate driving force and control.
Front op amp with two straight LM49720 dual op amp, composed of 4-channel circuit.
2 imported transformers, left and right channels each one, do not interfere with each other (prototype is made of cattle, bulk has been imported cattle).
The main filter uses Nikon nichicon audio capacitor KG gold tune
Semi - intelligent control circuit.
Using matrix relay volume, to ensure that the 4-way volume to an unvoiced.