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amp for speaker ...
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perik
Wannabe
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Joined: May 11, 2007
Posts: 3
 amp for speaker ...

Hi!

Im going to buy the following studioamplifier:
Alesis RA-100, 2x100W without fan, 2u

I shall use the amp for studiomonitors like event 20/20 and for a small PA.

My question is will the amp be powerful enough to run the speakers? What shall I think of? The room we are rehearsing in is not more than 12 squaremetres so it doesn’t have to be that powerful, but just enough to run guitar, bas, song etc. through the mixer.

How many W is suitable for the speakers to that amp?
How does the ohm affect?
What is SPL and what is a good value in SPL?

Will the alesis amp be able to run a pair of speakers that looks like this:
200W 8 Ohm Max SPL 117dB

Thanks for your help

Perik
Post Fri May 11, 2007 12:09 pm 
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uncle_jerr
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Joined: Jan 05, 2005
Posts: 410
Location: Illinois

it can run two 100w speakers at 4 ohms, or 2 75w speakers at 8 ohms according to the instruction manual:

http://www.alesis.com/downloads/manuals/RA100_Manual.pdf
Post Sat May 12, 2007 3:48 am 
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perik
Wannabe
Wannabe


Joined: May 11, 2007
Posts: 3

thanks for reply

do you think it will be powerful enough?

I have a small mixing studio at 12 squaremetres. My plan is to buy a amp to drive my monitors when Im mixing and to switch to the speakers when we are rehearsing. just switching the cables. We are using a jembre drum, and through the speaker through a mixingconsule song, bass. guitar and an unamped accordion. the unamped accordion gets in good level unamped together with the amped instruments and song, so there you have got the approximate level Im going to need. enough to mix nicely together with unamped accordion.

do you think that amp will be able to run the speakers at a satisfying level?

anything I shall think of when buying speakers?

thanks

Perik
Post Sat May 12, 2007 10:50 am 
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uncle_jerr
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Location: Illinois

yeah they should be fine as long as they're within the specified limitations. Should get plenty of volume for practice.
Post Mon May 14, 2007 12:54 pm 
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perik
Wannabe
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Joined: May 11, 2007
Posts: 3

Quote:
yeah they should be fine as long as they're within the specified limitations. Should get plenty of volume for practice.



how do I know this?

specs on the speakers are:
200W 8 Ohm Max SPL 117dB

specs on the amp is:
Alesis RA-100, 2x100W without fan, 2u
Post Mon May 14, 2007 1:19 pm 
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uncle_jerr
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Joined: Jan 05, 2005
Posts: 410
Location: Illinois

Ok, so the speakers require 200w each @ 8 ohms.
The amp can only provide 75w each @ 8 ohms. so the amp will not adequately power those.
Post Mon May 14, 2007 1:26 pm 
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