Before turning the HZ-10SE on, we recommend that you set the Preamp Module and Main Preamp Unit
controls as follows:
Preamp Module
: Knob = 0 (off).
Main Preamp Unit
:
Front Panel
Rear Panel
Input control: 0
EQ controls: centered
Effects send: centered
Effects L, R: 0
EQ switch: out (off)
Mix/replace: out (mix position)
Output (L/R) control: 0
After plugging the unit into a grounded 120V receptacle, turn the HZ-10SE's power on via the rear panel
power switch. The yellow 'power' LED on the front panel should be illuminated. [Note that both the main
and effects send outputs contain mute circuitry to minimize turn-on transients ('thumps'). The outputs are
muted for about 3 seconds, allowing the voltages within the unit to stabilize.]
Setting the Preamp Module Gain
The Preamp Module is designed to interface with pickups or mics having both low and high output level,
by proper adjustment of the gain control. Setting the
Maximum Level
for your pickup is done as follows:
• First, be sure the input control on the Main Preamp Unit turned all the way down so that
there's no signal passing through it. And, if there is a level control on the instrument (from an
on-board preamp), be sure that is turned all the way up.
• Next, strum your guitar at the loudest level you'll be playing and slowly turn up the gain control on the
Preamp Module. At a certain point, the red 'peak' LED on the front panel near the input control may
begin to flash. This indicates the signal level is within 6 dB of overload (+14 dBu).
• Then, back off a bit (about one division) from this position. This will assure enough headroom remains,
since guitarists often end up playing a lot louder than when they set up!
At this point, the Preamp Module's Gain is properly set for your pickup. A few things to keep in mind;
with very low level transducers, the 'peak' LED may only flash rarely even with the gain control all the way
up. This is OK. On the other hand, very high level pickups will require much less gain.
Note that the Gain
control provides a convenient way of adjusting your volume or turning the instrument off from your playing
position. Just keep the Gain control below this maximum level setting to prevent overload distortion.
If your
module came with special instructions - please refer to those for proper set-up and operation.
Setting the Operating Level in the Main Preamp Unit
Input Level
The green 'signal' and red 'peak' LEDs are used to establish the proper signal level in the Main Preamp
Unit:
• As you strum your guitar, turn up the Input control on the front panel of the HZ-10SE until the 'signal' LED
begins to flash. This indicates the signal level is at the lower limit of the normal operating range