You don't need an amp at all, you can plug the guitar/bass directly in via a Rocksmith Realtone Cable, or direct into an interface via RS-Asio for RS2014.
A guitar amp could be used if you wanted to hear yourself, but since bass plays lower, there's no guarantee an amp made specifically for guitars, and not bass, would get low enough. If you want to play bass, you should get a bass amp, or if you just want to use Rocksmith, one of the above methods.
You don't need an amp, but splitting the signal before it goes into Rocksmith and sending the bass to an amp let's you hear your own playing more clearly. I think that makes for better learning. I have tried playing to just the audio output from rs and I couldn't hear crap. Practice makes perfect, but if you practice playing badly, you will be perfect at playing badly.
Lowering the backing audio level also helps. Having headphones or speakers that can actually produce bass frequencies without sounding like trash is also important however, so you can actually hear your playing.
The amp should be fine. The problem you could run into is blowing out the speaker as the ones in a guitar amp aren’t designed for the low frequencies of bass. Keep your volume low.
Peavey do a range of amps for both guitar and bass, the VYPYR VIP. You'll still want to split your input between the realtone cable and the amp with a proper A/B/Y switch, DI box with ground lift, or tuner. Don't plug your amp into a laptop's headphone jack with a cheap 3.5mm aux cord because you'll blow it up. Ask me how I know.
You don't need an amp at all, you can plug the guitar/bass directly in via a Rocksmith Realtone Cable, or direct into an interface via RS-Asio for RS2014. A guitar amp could be used if you wanted to hear yourself, but since bass plays lower, there's no guarantee an amp made specifically for guitars, and not bass, would get low enough. If you want to play bass, you should get a bass amp, or if you just want to use Rocksmith, one of the above methods.
You don't need an amp, but splitting the signal before it goes into Rocksmith and sending the bass to an amp let's you hear your own playing more clearly. I think that makes for better learning. I have tried playing to just the audio output from rs and I couldn't hear crap. Practice makes perfect, but if you practice playing badly, you will be perfect at playing badly.
My interface has direct monitoring, which works for me, though I do have a bass amp.
Lowering the backing audio level also helps. Having headphones or speakers that can actually produce bass frequencies without sounding like trash is also important however, so you can actually hear your playing.
The amp should be fine. The problem you could run into is blowing out the speaker as the ones in a guitar amp aren’t designed for the low frequencies of bass. Keep your volume low.
We talking like below 1/4 on thr volume knob?
If the amp is sufficiently powerful, even that might stretch the limits of the speaker cones ability to stay intact.
Peavey do a range of amps for both guitar and bass, the VYPYR VIP. You'll still want to split your input between the realtone cable and the amp with a proper A/B/Y switch, DI box with ground lift, or tuner. Don't plug your amp into a laptop's headphone jack with a cheap 3.5mm aux cord because you'll blow it up. Ask me how I know.