DECWARE OWNERS MANUAL – MODEL SE84C+
Now that you have the tubes installed and know what each one is for, hook your
speakers and source up to the amplifier and turn it on. Be sure to have the volume
control all the way down. After the tubes slowly light up and begin to work (about 20
seconds or so) you can slowly start to raise the volume. If you hear distortion it means
the amp is still warming up. 60 seconds is the official warm up time before you should
panic.
POWER OUTPUT
Your amplifier will drive almost a dead short – meaning that a 2 ohm speaker won't
irritate the amp in any way shape or form. In fact it will like it – a lot. Because of this
unique ability for a single-ended amplifier, it is able to drive every speaker with a good
frequency balance. The issue is never going to be the amplifiers ability to drive a given
speaker but rather how loud it will get and if that volume is satisfactory. Complex, low
efficiency speakers typically have a busy crossover network that is sure to spend a good
portion of the first watt into heat before it ever reaches the drivers. With only a couple
watts to work with, you don't want to waste any power into heat if you don't have to.
Ideal speakers are generally simpler designs with higher efficiencies.
INPUT SENSITIVITY
This is the amount of signal required to get full output from the amplifier – or put
another way – how much signal it takes the get the amp to clip. For whatever reason
the industry has used 1 volt as the standard requirement to bring an amplifier to full
power and this is fine. The standard output of CD players, DACs, and most line level
sources is 2 volts. We designed the Zen amps to use the full 2 volts in order to come to
full power. This means that with a CD player hooked directly to the amplifier you would
be able to turn the amplifier volume all the way up and reach the power limit just at the
onset of clipping. This makes it very difficult to clip (distort) the amplifier and
consequently the amplifier has the world's most graceful clipping – so much so in fact
that many people don't even know when or if the amp is distorting when they have it
turned all the way up.
CLIPPING
The first thing everyone is going to do when setting up a Zen amp with a given set of
speakers is find out what the max volume is going to be and if that volume is going to be
enough to satisfy. Because the clipping characteristics of this amplifier are so polite it
can be hard to hear exactly when the amp is beginning to run out of power (clip) so here
is a secret way to tell:
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