all mentioned ARE buffers; buffers are there for a few of reasons,
1. to increase current (not voltage)
2. to take an impedance that is higher than we would like and output with a very low impedance, this gives a wider range of headphones that can be used effectively. the ideal buffer has infinite input impedance and infinite output impedance
3. this way the buffers are taking the 'weight' so to speak, leaving the opamp unaffected by the load (your headphones)
as far as texts, sorry I dont know anything off the top of my head, but google is your friend. they can be bought online at places like mouser and digikey safely and cheaply. but not on adapters. some will be available in a DIP8 package that does not need an adapter. you can try browndog.com, but they are a bit pricey. PM member highflight. he has already posted on this page, he'll sort you out
1. to increase current (not voltage)
2. to take an impedance that is higher than we would like and output with a very low impedance, this gives a wider range of headphones that can be used effectively. the ideal buffer has infinite input impedance and infinite output impedance
3. this way the buffers are taking the 'weight' so to speak, leaving the opamp unaffected by the load (your headphones)
as far as texts, sorry I dont know anything off the top of my head, but google is your friend. they can be bought online at places like mouser and digikey safely and cheaply. but not on adapters. some will be available in a DIP8 package that does not need an adapter. you can try browndog.com, but they are a bit pricey. PM member highflight. he has already posted on this page, he'll sort you out











