far0n Posted December 4, 2011 Share Posted December 4, 2011 My eventual plan is to run two 4 ohm cabs through an amp that obviously can run at 2 ohms. So I'd pretty much decided to get a QSC 1850HD. I noticed that to run at 2 ohms the amp needs to be in ran in stereo, so is it just a case of taking a line out from one channel into the other ?? Anyone recommend a half decent preamp to go with it ? Running in stereo could be fun afterall !! Quote Link to comment Share on other sites More sharing options...
Acebassmusic Posted December 4, 2011 Share Posted December 4, 2011 I used to run a QSC PLX 1604 with various pre amps. I had one output from the pre into channel 1 of the PLX, then set the dip switches on it to parallel and voila you can either run 1 cab per channel or just 1 cab if you have quieter gigs. I did try stereo / seperate sounds to each channel / cab at one point but didnt find it did quite what I thought it would do! By using the power amp you can chop and change youre pre amp every gig if you want to...lol. I'm using an Alembic F-1X which I'm really happy with. In the past I've tried Ampeg SVP-PRO, Mindprint En-voice II, JoMeek VC6Qcs all of which I can reccomend. If you do a trawl of the forum(S) you'll probably get a more detailed description of sounds available from different pre's that would help you decide. Quote Link to comment Share on other sites More sharing options...
eddiehoffmann Posted December 4, 2011 Share Posted December 4, 2011 I have a QSC PLX1602, which also can have each channel running at 2 ohms simultaneously. You don't necessarily have to use both channels, though. If your cabinet(s) have a total resistance of 2 ohms, you can power them through channel A, for example, and have channel B turned all the way down. Or, you can set the amp so it takes only one input signal and splits it between channel A and B. You still can run 2 ohms per side, but feeding the amp just one signal from a single preamp. With mine QSC I used the MXR M80 bass DI, Bass Pod Pro, TL Audio 5051, Focusrite Twin Track Pro and the Sansamp VT Bass. I liked all of them, but my favourite of the lot is the VT Bass, but it depends a lot on the sound you're looking for. Quote Link to comment Share on other sites More sharing options...
LawrenceH Posted December 4, 2011 Share Posted December 4, 2011 [quote name='eddiehoffmann' timestamp='1323020145' post='1458361'] I have a QSC PLX1602, which also can have each channel running at 2 ohms simultaneously. You don't necessarily have to use both channels, though. If your cabinet(s) have a total resistance of 2 ohms, you can power them through channel A, for example, and have channel B turned all the way down. [/quote] It's probably better for reliability in the long-term to run 2 channels at 4 ohms rather than a single channel at 2 - look how the distortion spec differs for the PLX series at 2 ohms versus 4. As above, the parallel switching config makes this a doddle. Quote Link to comment Share on other sites More sharing options...
eddiehoffmann Posted December 4, 2011 Share Posted December 4, 2011 [quote name='LawrenceH' timestamp='1323022777' post='1458402'] It's probably better for reliability in the long-term to run 2 channels at 4 ohms rather than a single channel at 2 - look how the distortion spec differs for the PLX series at 2 ohms versus 4. As above, the parallel switching config makes this a doddle. [/quote] +1 to that. Quote Link to comment Share on other sites More sharing options...
far0n Posted December 7, 2011 Author Share Posted December 7, 2011 Anyone know the difference between the GX range and the RMX range ? Ta Quote Link to comment Share on other sites More sharing options...
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