DECWARE OWNERS MANUAL – MODEL SE84C+
Turn off the lights and look into the output tubes. There are some small square holes in
the gray plates inside the tube where if you look through them you can see a blue glow
on the internal grids of the tube. This blue plasma is your visual clipping indicator.
Simply find the line of sight that lets you see the blue glow inside the tube and raise the
volume of the amp until you see the glow start to flicker with the bass line of the music.
This is the max clean volume of the amplifier without distortion. You'll likely find this to
be at somewhere past ¾ on the volume control and on some softer CD's you may find it
to be all the way up.
BIAS SWITCH
The switch as seen in the second picture in this manual exists for one reason only – to
change the sound of the amplifier, giving you two possible sound signatures at any given
point while listening. The switch changes the bias current of the input tube that results
in a more laid back signature vs. a more pronounced dynamic and presence. No one
agrees on which way sounds best – so it is a function of the source and or preamp you
use as well as the type of speakeras you have that will determine which way will sound
best to you.
The switch can be operated while listening without damage to the amplifier or speakers
even though you will hear significant pop when the switch is changed. Don't worry this is
normal. At 2 watts the amplifier is incapable of blowing up a speaker (even tweeters).
On a similar note, the amplifier itself is impossible to blow up too. For example; shorting
the speakers wires together will have no effect. Leaving the speakers unhooked from the
amplifier, while usually death to most tube amps, will also have no effect. The output
transformers are oversized, and 2 watts is not enough to damage them.
OUTPUT TRANSFORMERS and IMPEDANCE
The Zen amp uses proprietary transformers. It's output transformers are wound on grain
oriented silicon steel and nickel cores. They are the result of a few years of R&D and are
one of the substantial secrets behind this amplifies huge success.
A couple things are different when compared to most other tube amps. First the outputs
(secondary windings that connect to the speakers) are floating with no reference to
ground. The Zen amp will work in either configuration meaning that if you did connect
the negative speaker jack of each channel together, or each to ground, the amplifier wil
still work fine. The advantage of the floating outputs is realized in the holographic way
the amplifier images.
The acceptable speakers should fall between 2 and 8 ohms. There is no need to worry
about changing the amp when changing speaker loads.
Manufactured by High Fidelity Engineering Co. WWW.DECWARE.COM
(21 pages)
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