Steve Thomas Posted September 2, 2008 Share Posted September 2, 2008 So I have on loan a L Gruppen 6400 power amp currently being used to power a Martin Audio system (F12/S15) in mono (for now) and patched into a Dynacord Powermate and patched through a crossover/limiter. When I first took the amp out, there was virtually no sound (live 5 piece pop band) and I ended up using my 1100w C Audio amp for the night. I am a complete newbie to this kind of thing but noticed that the amp has variable gain stage dip switches on the back and it was set to 20db. Now when adjusting these switches at home and doing a like for like comparison to the C Audio I found that I was more likely to need these switches set to either 35 or 38db (difficult to really pin down at home on perceived volume). The db rating goes up to 41db and L Gruppen say there may be a trade of on the higher settings. Can anyone give me a layman's version on these switches and where I should correctly have them set at and then how I go about setting my limiter threshold etc? Link to comment Share on other sites More sharing options...
mackerr Posted September 3, 2008 Share Posted September 3, 2008 The gain switches are just that, they change the gain of the amp only, not the maximum power output. With lower gain you will need more "drive" to reach the same output. If you are using a DSP speaker processor, it may require a particular gain from the amp in order to be in the right range, and you should check the DSP manual to determine this. A setting so 20dB gain on an amp is pretty low, with most amps the lowest gain you will find is the 26dB setting on Crown amps. QSC amps range from 32dB to 38dB of gain. All of those gain settings refer to the gain control knob up full. Your limiter settings will depend on the requirements of the speaker system. Mac Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.