Andrews Amplification Spectraverb Руководство по эксплуатации - Страница 9
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Печатать страницу5. IMPEDANCE SELECTOR
according to the chart below. Note: The Spectraverb 1X12 combos incorporate
built-in 8 ohm speaker loads so leave it set to 8 when not connecting another
cabinet.
Setting For One Cabinet
4
One 4 ohm cabinet
8
One 8 ohm cabinet
16
One 16 ohm cabinet
6. OPTIONAL FOOTSWITCH JACK –
here. The footswitch will allow the reverb circuit to be turned off remotely. A
specially modified volume pedal can be used in this jack to adjust the reverb mix.
7. OPTIONAL BUFFERED SERIAL EFFECTS LOOP
connecting effect units such as reverb, delay, tremolo and chorus to avoid the
noise and distortion that sometimes occurs when connecting the certain effects in
the input jack if using high gain settings on the amp. Effect loops are generally not
recommended for overdrive and distortion effects.
a)
Send – Connect the input of your effects chain here.
b)
Return – Connect the output of your effect chain here.
c)
Level – Adjusts the level of the loop signal. For best results, first try the
LOW level setting. The LOW will work best for most applications. The HIGH
setting may produce slightly less background hiss but is only usable for "line
level" effects and may cause distortion or volume reduction under certain
conditions, especially when the clean channel volume or overdrive channel
gain is set very high. See notes below.
d)
Bypass – To completely bypass the loop circuit and maintain a 100% tube
signal path, set this switch to the "out" position.
Notes on the effects loop – Some 9 volt "stomp box" type effects are not designed
to be used in effect loops and can not handle the levels present in the loop without
distortion. If your effect distorts even when the loop is switched to the LOW level
setting, your effect unit may not be compatible. Try upgrading to an effect that can
handle higher levels or one that runs on a higher supply voltage. You may also
encounter higher levels of hum if using effects in front of the amp and effects in the
effects loop if they share the same power supply. This is cause by the ground loop
that is created between the signal ground connections and the power supply
ground connections. It is recommended to use separate supplies for each group of
pedals or a high end supply with isolated DC outputs for each group of pedals.
– Always set this switch to the proper speaker load
For Two cabinets
Two 8 ohm cabinets
Two 16 ohm cabinets
Insert the plug from the footswitch cable
– Use the loop for
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