Balanced Version Pga2311 Preamp Board Volume Controller Instructions

I've been surprised and pleased at the hi-fi coming out of the far east these last few years, making some pretty high end sounds available to those of us on a budget if we are willing to forgo some of the luxury trappings of the hobby. Manufacturer: Anonymous, supplied by ebay seller along1986090 DIY PGA2311 Preamplifier Another 'T' Preamplifier? Since there is no reason to introduce parts which have a higher distortion or THD level than your actual amp.PGA2311 DIY Preamplifier listening test Does anybody now any analog switches and volume controls which achieve and extraordinary signal quality. Ok, sometimes potentiometers are better or have other advantages or disadvantages than relay based attenuators.īut in the end if you do not want to reduce the singal quality as minimal as possible it is the way to go.īut I am looking for digital (CMOS based) chips which do a comparable job. But most probably this be not part of this design.Įverybody seems to agree in this forum that using relays for analog input switching and volume control is the absolute best way to achieve the best signal quality. If needed a balanced to single ended converter can be attached after the volume control. The volume control will be an plugable module too - since currently there is a hot debate if LDR/chips or stepped attenuators are the way to go. This module will be plugable in some way so that you can choose the technolgy you like (opamps, discrete or whatever). To convert between single ended and balanced there will be an an single ended to balanced converter. The output can be balanced or single ended – according to your needs. For each input it is configurable if it is balanced or single ended.

The basic input selection can switch between a number of balanced or single ended inputs. There is plenty of help out there to programm it to the specific needs. The decision to base it on Arduino is to make programming as easy as possible. It will have plenty of outputs for LEDs and plenty of inputs for buttons, rotary encoders or even analog potentiometers. To give you an image of the whole system I have drawn an image:Īn Arduino compatible CPU is driving the whole system. Stay tuned! PCBs will come in the near future (I really need it). Originating form the simple question (see below) of how to have a silent, high quality volume control & input selection I have decided to build an passive ♜ontroller based, arduino compatible preamp input selection & volume control.

Balanced Version Pga2311 Preamp Board Volume Controller Instructions