You can find a lot of discrete direct replacement boards on ebay for single or dual opamps like this one :
https://www.ebay.com/itm/DUAL-Channels-Full-Discrete-Op-Amp-Module-replace-NE5532-MUS02-OPA2604-LME49720/272265794397?hash=item3f644e535d:g:-58AAOSwOVpXVYx4
or these (much more expensive) :
https://www.ebay.com/itm/Burson-V5i-D-HiFi-Discrete-Dual-Operational-Amplifier-OP-Amp-Chip-replace-OPA627/253318135406?epid=19011575292&hash=item3afaeffe6e:g:9nsAAOSwv-ZaNzKU
Does anyone tried them in diy projects ? i am planning to mod my 1178 input stage (ne5532) with one of them ... good idea ?
https://www.ebay.com/itm/DUAL-Channels-Full-Discrete-Op-Amp-Module-replace-NE5532-MUS02-OPA2604-LME49720/272265794397?hash=item3f644e535d:g:-58AAOSwOVpXVYx4
or these (much more expensive) :
https://www.ebay.com/itm/Burson-V5i-D-HiFi-Discrete-Dual-Operational-Amplifier-OP-Amp-Chip-replace-OPA627/253318135406?epid=19011575292&hash=item3afaeffe6e:g:9nsAAOSwv-ZaNzKU
Does anyone tried them in diy projects ? i am planning to mod my 1178 input stage (ne5532) with one of them ... good idea ?