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Old 8th March 2009, 04:01 PM   #11
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I want to drive an old Beovox S35 loudspeaker, one for each channel. These are 8ohm speakers with a load of 35 watt.

Here are the specifications.

Beovox S35 specs

I think it should work although the volume isn't going to be very loud.

I am using this "project" also to get familiar with amplifiers and loudspeakers, my knowledge isn't very broad on this subject so please correct me when i am doing wrong things or make misconceptions about the theory.
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Old 8th March 2009, 04:57 PM   #12
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Quote:
Originally posted by hilbert_mostert
I want to drive an old Beovox S35 loudspeaker, one for each channel. These are 8ohm speakers with a load of 35 watt.

Here are the specifications.

Beovox S35 specs

I think it should work although the volume isn't going to be very loud.

I am using this "project" also to get familiar with amplifiers and loudspeakers, my knowledge isn't very broad on this subject so please correct me when i am doing wrong things or make misconceptions about the theory.
The one critical bit of information missing is the efficiency of that speaker in dBSpl/W/M.. I suspect in this design that would probably in the low to mid 80's, but there is really no way to know. (This isn't very efficient, but should be adequate if levels are not expect to be very high.)

For somewhat more money an SE based on the EL34 would give you at least twice the power of an EL84 in SE (whether triode, UL or Pentode mode) and I suspect with these speakers you need the additional power.
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Old 8th March 2009, 05:10 PM   #13
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I have been looking for the dBSpl/W/M values on the internet for almost two hours, nothing found....

If the EL84 design isn't powerful enough then iŽll buy other speakers with higher sensitivity. My current speakers are oldies and are first on my "kick list". So that's not really a problem.

( and i think my neighbors wonŽt mind the lesser volume ;-) )
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