I tried one of those little Ampeg 25 Watt practice amps. The idea was to have something I could leave set up in my music room to practice through. If that thing genuinely put out a solid 25 Watts RMS at 20 Hz., then yes, it would have been okay providing the loudspeaker / enclosure / tuning was adequate to produce some low bass. But no, no and no. Not. Nothing will convince me that thing put out any where near 25 watts of real power across the audio spectrum, but particularly not down in the low bass.
As a comparison, half of a Dyna Stereo 70 (35 Watts RMS) will rock your world in a practice room (you have to use a bass preamp) if the cab is relatively close to your head on a stool or something, even through an inefficient small loudspeaker provided it has some true bass response (such as my Acme Low B112FR).
Next I tried another combo with a 12 inch speaker, 100 watts, I think. It did okay I guess until I wanted to play below let's say the low F# or E on my five string, at which point it just seemed to run out of juice even at low volume. Didn't sound good down there. I should have tried the 15 inch Rumble. But I didn't. Wasn't checking out TalkBass back then.
By that time I was frustrated and I happened to visit GC to pick up some cords and saw an Ampeg SVT 7Pro in the bass room. That's a GC story in itself but to make a long story short, I now have an SVT 7Pro and an Acme Low B112FR that lives in my music room, and it works great! Well, it worked great until the aux power supply controller chip exploded in the SVT 7Pro which almost blew me off my stool since I have the cab on another stool right next to me when I practice! That's all worked out now. Thank God Yamaha acquired Ampeg! Anyway, even at 2:00 AM which always seems like a pretty good time to practice, I don't bother my neighbors in the Condo at the volume I play at and I get beautiful low end response that is very satisfying and inspiring. Then again, I'm not playing Viking metal, either. But I would say quality is quality and it makes a difference no matter what volume level you may be playing at.
I already addressed the OP's other issue.