Valve amplifier for DJ
18 December 2003 Comments : I wanted to put together a sound system for
portable DJing use, (small venues, wimbledon - tennis
court sized at the most) I was thinking about valve amps (for private
party use) how much would
an appropriate valve amp cost? is there one in your range that would
be of an appropriate
volume? i am looking for something bigger than what i need (in terms
of output) so i don't have to
run it too hard to get a desired volume .... what speakers would you
recommend?.. think im barking up the wrong tree on this one?.. :-s
We sell 80 watts + 80 watts valve / tube amplifier that uses 8 pieces
of BIG EL34 valves
for only GBP £1000
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We have a old ancient "Trix" PA (Public Announcement) amplifiers using
EL34 (Automatic Bias) producing 20 watts MONO.
I believe that
this 20 watt MONO amplifier was used for PA (Public Announcements)
in factories, halls and cinemas.
We have use fixed bias, so that doubles the power to 40 watts
We have stereo, so that double the power to 40 watts + 40 watts
We use DOUBLE the number of valves to DOUBLE the power to
80 watts (RMS.) + 80 watts (RMS.) = 160 watts (RMS.).
If you are a bit optimistic,
you might be able to claim as much as 100 watts + 100 watts = 200 watts
The international price is about USD 1450.
At the moment, the British pound to USD is only 1.7
so the English price is only GBP 900
This valve amplifier is more than enough for your "tennis court" venue,
BUT
MOST PA SPEAKERS CANNOT COPE WITH 80 WATTS (RMS.) + 80 WATTS (RMS)
= 160 WATTS (RMS)
Just because we have PA amplifiers producing 500 watts,
it does NOT mean that the "typical" PA speakers will cope with 500
watts !
If you pump 100 watts into a low efficiency speaker,
about 1 watt will be converted to sound,
and about 99 watts will be converted to heat, etc
So, your the center of your drive units will be almost as hot as a 100
watt light bulb !
But as you and I know,
the center of your drive units doe NOT even get warm,
BECAUSE YOU ARE USING LESS THAN 1 WATT ! |