Engl E670 - Page 17

activating . The Crunch channel also puts out mild, rock-approved grind:
Activate and dial inlower gainlevels bysetting somewherein the
9-1o'clockrange.
Switches the power amp's output level from low (Low Power: 50 watts) to high (High
Power: 100 watts) and back. In the former, the power amp operates with two power
tubes; in thelatter, with allfour tubes.The LED abovethe buttonlights upto indicate
HighPowerison.LowandHighPowercanalsobeactivatedviaMIDIprogramchange
ortheENGLCustomZ-9Footswitch.
The ability to vary the power amp's output comes in very handy, particularly at gigs:
LowPowermodeisgreatwhenyouwantpowerampdistortiontospiceupyourtone.
Thepowerampsaturatesmuchsoonerathalftheoutputpowerandyoudon'thaveto
dial in ridiculous levels to get it to break up. Besides, 50 watts is more than enough
sonic muscle for many venues. If massive clean headroom is your thing, go for the Hi
Powersetting. It's alsothe better choiceif you'rerunning theLead channel inModern
mode athigher volumes. That way, you can exploit thepower amp's greater dynamic
range.Notethatwhenpushedtotheirlimits,powerampstendtooverstatemidrange
frequencies; you can avoidthis byopting forgreater headroom afforded by Hi Power
mode.Best of all,you canswitch fromLow toHigh Power onthe fly,going from50 to
100 watts while you're playing! In combination with the two Master knobs and the
various preamp channels, this feature harbors a tremendous amount of sound-
shapingpower.
Only the two exterior V1 and V4 power tubes operate in Low Power mode. If you
frequently run the amp in this mode, these two tubes are of course subjected to
greater wear. In this case, you may find that the two external tubes require sooner
replacement.
Thisampisequippedwithamicrocontroller-driven,powertubemonitoringsystem.
In the event that an active power tube fails when the amp is in Low Power mode, the
appropriate interior tube is automatically activated, switching from V1 to V2 or V4 to
V3inordertomaintainthe50-wattoutputlevel.
This feature is very useful if you want to make the most of the vast range of sounds
offered by the amp. It lets you match specific cabs to specific amp sounds. Alongside
theampitself,thespeakersand even the cabinet's housing (say E412vs.
E410) play a pivotal role in shaping sounds, so you can configure rigs to
best match the sound you have in mind. For instance, the aforementioned E410 is a
Gain Boost
Crunch CrunchGain
Atipfromthedesigner:
Notealso:
Atipfromthedesigner:
SwitchesfromspeakeroutputAtoBback.
The LED above the button lights up to indicate is
activated. can also be controlled via MIDI program change or the ENGL
CustomZ-9Footswitch.
Speaker B
Speaker A/B
44 LO POW./HI POW.
45 SPEAKER A/B
Aspeakermustbeconnectedtothe
, orthe ,B jackbeforeyoucanactivatethe
respective output.
Power
AmpOutputA1 A2 PowerAmpOutputB1 2
aclosed-back
an open-back
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