2:50 question

fusguitar · Jan 25, 2007

Hi guys, newbie here!

I'm planning to buy a 2:50 and i would like to ask you if i can have a really 100w with this amp.

I mean in live situations if i place a mic in one speaker while i use the two channels i'll have only 50w from the console... so if i want to have a really 100w have i to place 2 mics?

I know that here there are many experienced owners, so can you help guys?

thanks!

ytse_jam · Jan 25, 2007

hi fusguitar. Well, it is not the wattage the impotant thing if you feed a mixing console through a mic, but the volume level of your amp: then on the mixer you'll set the right amount of gain in the integrated mic preamplifier depending on that volume level. It is common for a mic to be placed to capture the sound of a single speaker... the only reasons to have two mics (sending their signal to different mixer's inputs) are: 1 you're using two different preamps/effects through your two poweramp channels; 2 you've got stereo effects; 3 you've got different mics, so each one will add its own character to the captured tone. So, in cases 1 and 2, mics have to be placed on different speakers (one speaker feeded by channel 1 of your 2:50 poweramp, the other feeded by channel 2): in example, if you've got a 4x12 wired in stereo, i suppose the left two speakers (both top and bottom) will be feeded by channel 1, and right speakers (again, both top and bottom) by channel 2; so you must place a mic in front of one of the two left speakers and the other mic in front of one of the right speakers. In case 3 you could also place the mics in front of the same speaker (but if your case is a "combination" of cases 1&3 or 2&3, do as you were in case 1 and 2).
More wattage only provides more volume and headroom, but it's not directly related with this situations!

fusguitar · Jan 25, 2007

thanks ytse_jam for you answer

but i mean that if i feed a console with only i mic (even if i have a one stereo cab) and using the two channels of the amp then the console will receive at most 50w and not 100w as if the amp was mono. i didn't try yet but i wanted some opinions.

another guy in this forum mentioned if we can bridge a stereo boogie (like a carvin power amp) but i suppose that we can't

ytse_jam · Jan 25, 2007

the fact is that talking about "wattage received by the console" hasn't got a sense. it is right instead that the speaker you're miking, supposing it's the only speaker feeded by one channel of your poweramp, will dissipate at most 50W (power peak actually would be higher, since i think wattages are given as RMS). But i think there's not a power issue here (except if you wanna have a higer volume level to hear yourself on stage, but nothing related to mixing console!).
i took a look at the 2:fifty manual and i think you cannot bridge the inputs... you can use only one channel if you want to use it in mono, but remember to keep the inactive channel's controls at zero. However, in this case you'll be using only 50 watts.
hope it helps
franz

fusguitar · Jan 25, 2007

thanks mate

I try to think some alternatives, just for the conversation.

So, what if i run the amp stereo and the tips from the two cables goes to the two inputs of a "Y" box(2 inputs-1 output) and then from its one output goes to one input of mono 2x12 cab? is this a kind of a mono operation of the stereo amp? is this possible?