I think it depends , since the Bass CAN be so loud it's painful , or , just provide the bottom.
With The Dirtbombs , the two Bass , two Drums combination does'nt sound radically different , because it's all balanced out , to where it musically makes sense , even to my tin ear. But , I'm sorry , I never got it with Deadbolt , especially when I saw them live , two Basses just bleeding all over the place , cranked to "11". But , you're right , I don't see where two bassists is an improvement.
But , we both saw Lemmy's Rockabilly side project , The Head Cat. So , he had a Rockabilly standup Bass and his own Motorhead Bass , but , it musically made sense , even if it's too gratuitous for the average Rockabilly fan , and not gratuitous enough for the average Motorhead fan , I'll wager. NOW , if he had a proper Drummer , he'd REALLY be saying something.
James Porter said:
While we're on the subject of more than one bass...
When a band has more than one bassist, or drummer, I'll be damned if I can tell the difference. Either live or on record. It still sounds the same to me.
There is one Melvins CD I have where the sound is noticeably fatter with the additional bass/drums in the mix, but with everybody else, it doesn't really change the sound much. So you have two bass players? May as well have stuck to just one for all the good it did...