Hughes & Kettner Statesman Head EL34 Manual De Instrucciones página 5

SERIAL/PARALLEL
SmartLoop™ is a special effects routing circuit offering a switchable
parallel/serial effects loop. In parallel mode the processed signal is
added to the original signal of the preamp. In serial mode (SERIAL is
activated), SmartLoop™ works like a conventional serial effects loop.
FOOTSWITCHES
Statesman offers two connectors for footswitches. The connector for
the Hughes & Kettner FS-3N switches the channels, and in the DRIVE
channel the BOOST on/off and 2ND VOLUME on/off. 2 way or 1 way
foot switches can also be connected. With 2 way switches there is
no access to the 2ND VOLUME, the 1 way switch only switches the
channels. The second connection, e.g. for the Hughes & Kettner FS-2,
turns the internal spring reverb or the FX-LOOP on/off. Here also the
1 way foot switch can be connected; in this case only the FX-LOOP is
operated.
LOUDSPEAKER OUTPUTS
You have one 4-ohm output, a pair of 16-ohm outputs or one 8-
ohm output, and a 16-ohm output available for connecting speaker
cabinets of various impedances. Always ensure cabinets are connected
properly. Operating a tube amp with the wrong impedance or without
a connected speaker can damage it.
Note:
You may of course connect several cabinets to one port, even if they
have different impedances. Usually speaker cabinets are connected
in parallel. Two cabinets of the same impedance connected in parallel
have half the impedance of a single cabinet. For example, if you have
two 8-ohm cabinets, you must connect these to the 4-ohm output.
If you connect two cabinets with different impedances (R1, R2) in
parallel, the resulting resistance (R) is calculated by multiplying the
two individual resistances and dividing their product by the sum of the
individual resistances.
Use the following formula to do this: R = (R1 x R2) / (R1 + R2)
Take as an example a one 8-ohm and one 16-ohm cabinet:
R = (8 x 16) / (8 + 16)
R = 128 / 24
R = 5.33
The cabinets' impedance may never be lower than the amp's output
impedance, so this combination must be connected to the 4-ohm
output. However, we strongly advise against confi guring setups with
mismatched cabinets, and highly recommend using combinations of
cabinets with the same impedance!
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. Standard Set Up / Cabling
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. Tubes, Servicing & Maintenance
STATESMAN is factory-loaded with selected tubes. Once they've
been burned in – that is, operated continuously under a load –they
are subjected to a rigorous selection process. Their electrical specs
and mechanical status (microphonics) are checked, and then they are
installed in an amp and their sonic performance is auditioned. One of
the most important steps in this process is tube matching, whereby
tubes with the same characteristics are teamed up in matched sets of
power tubes.
When to Replace Tubes
The tubes in STATESMAN are exemplary in terms of quality, workman-
ship and long service life. Nonetheless, tubes show defi nite signs
of wear when their service life is nearing its end. Telltale signs are
increased microphonics, noise and hiss, muddier tone through loss
of high-end frequencies, degraded performance, etc. Take these
indications seriously and replace old tubes. Not only do these side
effects take their toll on sound quality, they also indicate the aging
tube will soon fail!
Note:
Replacing tubes for experimentation purposes is not recommended.
Installing the wrong tubes will damage the amp and cost you a lot
more than you bargained for in repair costs. Before you start swapping
tubes, ask yourself these questions:
•
Was the fault or failure of the tube caused by the tube itself or by a
fl awed peripheral device or component, perhaps a defective speaker
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