Hello,
In the pre-amp section of my integrated amplifier there are (2) 17k8 resistors which are the feedback resistors. 1 for each channel.
I cannot find a good quality 17.8k resistor. What will happen if I change this value slightly?.
I was thinking of 18k.
Is it a worthwhile cause to upgrade this resistor to a caddock or vishay?
Any input or experiences would be appreciated.
Thanks
KevinLee
In the pre-amp section of my integrated amplifier there are (2) 17k8 resistors which are the feedback resistors. 1 for each channel.
I cannot find a good quality 17.8k resistor. What will happen if I change this value slightly?.
I was thinking of 18k.
Is it a worthwhile cause to upgrade this resistor to a caddock or vishay?
Any input or experiences would be appreciated.
Thanks
KevinLee
Nothing much will happen. For peace of mind you should check the resistors which tie the - input to ground in order to calculate the gain but the change will likely be minute. Resistor sound is very much a personal choice and you should buy a few different makes and experiment in order to take the right decision.
The difference between 18k and 17k8 is 0.09705 dB approx. = not very muchKevinLee said:Hello,
In the pre-amp section of my integrated amplifier there are (2) 17k8 resistors which are the feedback resistors. 1 for each channel.
I cannot find a good quality 17.8k resistor. What will happen if I change this value slightly?.
I was thinking of 18k.
Is it a worthwhile cause to upgrade this resistor to a caddock or vishay?
Any input or experiences would be appreciated.
Thanks
KevinLee
Vishay makes good and normal industrial quality resistors, work good in most cases.
What type or brand did you have now?
Seriously I don't think it's worthwhile only to change two resistors. I think the active elements (opamps?) are far more important.KevinLee said:Peranders,
Right now there is only the stock metal film in place.
The feedback resistor is tied to ground with a 1K metal film.
Should I also upgrade the 1K resistor?
Thanks
KevinLee
Hello,
What are peoples favorite resistors for this application?
Caddock MK132, Tantalum, Vishay Bulk metal Foil, Draloric SMA-0207, Vishay CMF Type RN, are all types I am considering.
Any preferences of the above types for feedback circuits?
Thanks
KevinLee
PS. I am using OPA627 as my opeamp.
What are peoples favorite resistors for this application?
Caddock MK132, Tantalum, Vishay Bulk metal Foil, Draloric SMA-0207, Vishay CMF Type RN, are all types I am considering.
Any preferences of the above types for feedback circuits?
Thanks
KevinLee
PS. I am using OPA627 as my opeamp.
Should I also upgrade the 1K resistor?
You should although IME the fb resistor has the strongest sonic influence
Only your own ears matter in selecting the resistor types
Btw 627 is seriously overrated sonically
Maybe so, but still excellent!analog_sa said:Btw 627 is seriously overrated sonically
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