QSC RMX 850 and RBI owners, got a question

I had that exact set up up until I recently upgraded my poweramp and my pre. It's hard to beat for the money. Reliable, plenty of power and very teakable. I play classic rock covers. I think you'll have plenty of power, especially if you run in bridged mono on the RMX850. I run through Acme cabs and their inefficiency takes away from the volume. I'd think you'd be fine with virtually any other decent cab.

 

Kern IP-777 tube pre

 

i play in a new rock n roll band, kinda like Jet. I use the RBI into a QSC PLX 1202. I was going to buy the lower model of QSC preamp like you have said, but the weight will really get to you, especially once you put it in that rack case. Look around on ebay if you can and just wait for a deal, you can pick up a PLX for a little bit more if you just wait.

 

The QSC is an excellent amp. My RMX850 is loud enough, but I wanted more headroom, so I bought a Crown XLS 602. I'm still waiting to have that goofy reversed polarity cable made for the Crown, so the QSC probaly has about two more shows to play.

As someone said, the QSC is heavy, but it's not unmanageable. They're built like tanks though. When you put together a rig, one of the most important components is your power section. As with anything in life, there are places where you can cut cost and come out ahead. Buying a power amp IS NOT one of those times.

 

I used to run an RBI and a PLX-1602 in bridged mono mode into a Bergantino NV-610. It had plenty of power and was loud enough but I went to an Eden WT-800 because I like the Eden EQ section. To my suprise I actually found the Eden is louder and has more headroom.

 

I had the exact set up as well. I was using a Peavey Nitrobass run into a 8 ohm Eden 410 cab and it wasn't quite loud enough. I then picked up a RBI and a RMX850 and run it bridged into the Eden cabinet and it's LOUD! I'm now running a Schroeder 1210 with the RBI/RMX850 combo. I play in a alt/country, rock type band with two loud guitarist w/ tube amps and a very loud drummer and I've never came close to making my amp go into clipping.

 

why not buy a GK preamp? hauling a head AND a poweramp doesn't seem convenient IMO.....a separate preamp is MUCH lighter.

 

if it has a poweramp out, yes it will work

but cheap does not always equal better...

 

i'm using my 4 year old rmx850 as a bass amp for 2 x 15" eminence drivers, in an old acoustic slot vented cab.

i've been using the rmx850 EVERY single day for the last 3 years or so. it's my full range amp for my computer speakers, too. i just unplug and take it to practice with me. i haven't had one problem with it so far, and it never gets anywhere near clipping. PLENTY of juice for the application.

if anything, this thing is built like a tank. rock solid. not one single problem, and i'm very happy. i did replace the stock fan, because it was just too loud when using it to listen to music, etc.

 

the qsc rmx850 has 32dB of gain available. under normal conditions, you'll only need about a volt of input to get things really cooking.

i've hooked up my behringer bdi21 directly to the qsc, and using a passive jazz bass, and i got just fine output. no problems.

personally, i like having as much gain as possible, so i run the behringer to an art tube MP preamp (about 70dB of gain) and then into the qsc. makes everything a bit cleaner, and easier. for $50, having 70dB of preamp gain is a SOLID investment and wise idea.


just a thought.