Posted 23 January 2012 - 01:56 PM
I would never rely on monitors for your onstage sound. Most PA's I've ever gigged through have monitors set up to handle vocals - not low ended instruments like bass, druns, or even keys. Plus, if the monitor amp goes down - you're screwed. Always use an onstage amp. What you use will depend on what kind of sound your after, and what you are willing to haul. For blues, a 100 Watt amp into a 15" speaker should work fine. If you are just starting out - don't get hung up on things like brand name and tube/solid state. I also wouldn't run just Bass - to DI box - to board. Soundmen like that set up, but it takes away the sound that you like.
I personally own several Ampeg rigs, and use everything from a micd up vintage '63 B15, to multiple SVT-3 Pros pushing multiple 2x15 cabs using the 3-Pros DI out to the FOH. One of my favorite sounding Ampegs of all time is the simple 100 watt B-100R Rocket Bass amp. It's been discontinued, but the Ampeg BA115 does just as good of a job. It also has a 4 ohm driver, so you're getting the full 100 watts - and they are a loud 100 watts. That amp doesn't get a lot of respect, but I actually like it better than the new Ampeg PF500/PF115 Portaflexes.
Gibson Thunderbird Studio 5 String, Ebony
Gibson Thunderbird IV, Vintage Sunburst
Gibson Nikki Sixx Black Bird
Gibso-Epi-Lull, Thunderbird "64"
Gibson Les Paul Classic Guitar, HCS
Gibson THOR Bass Amp
Ampeg SVT 3 Pro (x2)
Ampeg SVT Gene Simmons 2x15 cabinets (x3)
Ampeg V4BH
Ampeg B-100R
Ampeg B-15NA - 1963
Ampeg BT-15C - 1967
Ampeg BT-15 Stack - 1966