Originally Posted by: peifferllps...what I meant was cello-like sustain ...

my question is can i get that sound using may line6 spider IV 150 watt head with multiple effects or do i need a tube amp also what type of fuzz pedal should i use.

You don't need a fuzz pedal.

Your Line 6 Spider has settings to duplicate both a Vox AC30 & a Fuzz pedal effect unit. The manuals can be found here to figure out how to set up the amp.

http://line6.com/support/manuals/spideriv150/

Hope this helps! Best of success!