Help me assemble an Ampeg Portaflex rig

My thoughts are that you would be better served with the cab first.
To repeat a common theme, a bad cab will still be bad with a good amp..... But even a bad amp can sound good through a good cab.
Bigger, slightly older amps, for instance from the 90's, are super cheap, and often are 100% fine, their owner is just moving on to smaller lighter or whatever.
You may be able to pick up the cab you like new and still have the budget for something like a 400/800RB or Hartke LH, SWR or Trace head, etc.

 

A PF800 and two PF 115HE cabs would probably do the job well. I don't think the PF cabs are really designed to fill a room, but I am not 100% sure how loud your band is and what kind of rooms you are referring to.

As for the cabinet, don't skimp on this part. It's the most important part of the chain. I have found the Ampeg PF heads do the warm sounding Ampeg vibe with just about any cab you can plug into it. I highly suggest getting two identical 8 ohm cabinets for instances where you need to be louder, filling the room or just getting the speakers next to your ears. You can also get one cabinet and a cabinet stand/something to stack your cabinet on and there you go - instant monitor.

 

I have been gigging a pf500 and matching 115 cab for several years. I have one of the early ones. I use it stand alone for almost all the gigs I do, which are small to medium sized venues. It has been plenty loud in almost every situation, no FOH support. I luckily scored a pf350 and similar 115 cab for a good deal and grabbed it to leave where we rehearse. On occasion I bring the second cab......but that is rare. We are a 5 piece which includes keys.

If I'm directly on the floor I take the back wheels off and aim it up. I find I hear myself better that way. On a hollow stage I prefer to leave the wheels on the cab.

I wouldn't hesitate to go for it and keep an eye out for a second cab. It looks great stacked and moves a lot of air with both cabs. There may be better sounding set ups and I have really only had a couple of 4x10 cabs to compare this to. The 15" cabs are super easy to transport and as I already said, sound great for my classic rock and country cover band.

 

Wheels are real easy to pop in and out and the tilt does make a difference. Knock on wood, I have had no problems with this amp and its played well over a hundred shows. I have run it at 4 ohms and 8 ohms with no hiccups. Again, I won't try to tell you it is the absolute best amp for my situation but I can guarantee that it has enough headroom and has a classic Ampeg tone. I've played through SVTs and a fridge when back line was supplied and this set up gets close without anywhere near the cost, weight or transport challenges. Good Luck with whatever you choose.

 

If you want to keep it under $800, PF500 and PF115 or 210 would cost just under that new. The PF112hlf is my favorite and I use one all the time, but if you happen to need serious juice to hang on a gig, it's not as robust as the 115's or 210.

 

PF500 and 212AV?

 

To throw my hat in the ring, I prefer the PF-210 to the 115. The 115 felt bland to me with the PF500.

 

I know I'm only guessing here, but I imagine @4-fingers is the exception rather than the rule. I have played all kinds of bars with all kinds of bands. The only shows I have ever played where a 1-15 bass rig would carry the room were private parties with volume complaints. I would be blown away if any single 15" speaker could carry a bar gig with no PA support unless your band is really quiet.

Maybe I'm the exception to the rule?

Maybe a fEarful or something like that could pull it off. But an off the rack consumer grade cab? I haven't seen/heard one. Two 15s or a really efficient 4-10 (or stacked pair of 2-10 cabs) I can see.

I'm fully prepared to be corrected if you guys play in pretty quiet bands.

 

Ya, the 210 is better IMHO if you like the slightly rolled off low end of the 810e. The 115's have more sub lows, especially the PF115lf. But the 115he has a goodly amount as well. Goes lower than any sealed cab I've ever heard.

 

Many bass players have no clue how loud they really are

 

+1
I gig a PF500 with a matching 115 and a 210. For several smaller gigs I have taken the 115 only. I usually have FOH support, and pretty much in each of those cases the sound engineer has had me keep my stage volume pretty low (relative to its capabilities). We are a five piece with keys, loud guitars, and loud drummer. Even in rehearsal with no FOH, I have always had the headroom I need with the two cabs at 4 ohms. If my band members had more discipline, a single 115 would be quite adequate. I tried the 115/210 combo based on Juan Alderete's Rig Rundown. I'm pretty sure I would've been satisfied with 2x 115s as well.