I have purchased a used Sonic Frontiers Line 3, to replace a Sunfire Classic preamp. The line 3 sounds really good in the mids to uppers but lacks bass (seems maybe a few Hz) and also punch and focus, that is compared to the Sunfire. I have tried replacing tubes (6922) and also a different amp, and still not as much bass. Under the hood it appears that the output caps have been upgraded to Jensen foil in oil rated at 0.33 uf. Could the Caps be limiting or rolling the bass? Would replacing the caps with 0.1 uf fix this problem? Any help would be appreciated. Thanks Dave
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