Mesa/Boogie JP-2C, Руководство пользователя, Страница: 30 / 56

This array of controls and Output comprises perhaps one of the most valuable and welcome feature set on any MESA amp, expanding
both the functionality and enjoyment potential many fold. The JP-2C is the third of our amplifiers to include this powerful tool built right
in for speedy and convenient recording applications without sacrificing authenticity and Tone. It’s sure to increase the professional
potential of this MARK model and help this compact package usher in a new era of MESA high power performance combined with
Studio ready convenience.
SPKR ON/SPKR OFF
This mini toggle mutes the SPEAKER Output for when you want to record “silently” with the CabClone
D.I. (direct with no speaker sound from the amplifier). This switch allows you to decide if you’d like to utilize both a live speaker
cabinet AND the CabClone’s XLR Direct Out, or just the XLR D.I. OUT. Also, while it’s not needed as you have the STANDBY on the
Front Panel for this purpose, this switch may be used as a Mute switch, though with its Rear Panel location this is a less desirable
way to achieve that function.
NOTE: IMPORTANT! The SPKR OFF switch position automatically connects a Load Resistor to the SPEAKER Outputs to prevent
damage to the output tubes and transformer and allow silent (no cabinet connected) direct recording with the XLR D.I. OUT. Select-
ing SPKR ON defeats the internal Load and connects the signal to the SPEAKER Outputs. DO NOT USE THE AMPLIFIER IN THE
SPKR ON SWITCH POSITION WITHOUT A CABINET (LOAD) CONNECTED! Damage to the amplifier will likely occur and this is
not covered under the Warranty! For this reason, we recommend keeping a cabinet or Load connected even when you are using the
SPKR OFF position as an extra measure of safety in case someone other than you (Tech or Sound Engineer) was ever to switch to
SPKR ON in a “Silent” session. It won’t hurt anything and only add a degree of safety.
NOTE: REMINDER! If you have everything ON... POWER, STANDBY, GAIN and MASTER (as well as Input and Output Volume
Controls on any Effects in the FX Loop) and get no sound; Check the SPKR OFF/SPKR ON switch in the CabClone™ Section at the
right of the Rear Panel (when looking at the back of the amplifier) to make sure the toggle switch is set to SPKR ON. This may have
been bumped during shipping, transport or set up.
CLOSED BACK/OPEN BACK/VINTAGE
Here in the JP-2C, the on-board CabClone™ D.I. feature offers three classic
“cabinet simulated” VOICING Modes and gives you the full feature set of the stand-alone CabClone DI minus the OUTPUT control. The
simulations are an analog representation achieved through passive means (without op-amps to add gain for shaping) and were created
using our 45 years of experience co-designing custom speakers with the world’s top makers and designing cabinets to load them in.
These CabClone “virtual-cabinet” options allow you to tailor the Direct circuit’s EQ response for different cabinet styles, gain regions
and/or different instruments and pickups. The choices range from bright and open with enhanced top end for buffed clean sounds
in OPEN BACK, to a more compressed voice with the upper harmonics shelved for warm, singing single note sounds and thick high
gain rhythm work in VINTAGE Mode, to a scooped mids and boosted top and bottom response curve in the CLOSED BACK setting
that excels at heavy Crunch rhythm and high gain Lead work..
Because clean and overdriven sounds really need these different cabinet types to sound authentic, you will need to experiment with
the three voicing options with your range of sounds for increased accuracy when employing the CabClone for direct recording.
The lower VINTAGE Mode position rolls off the upper harmonics and compresses the sound to create a warm, round voicing that’s
perfect for Jazz Cleans, Blues and Rock soloing—and most especially—high gain single note work for Fusion, Rock and Metal styles.
This mode allows greater freedom with the controls on the amp, enabling you to dial in more TREBLE and PRESENCE (and the top
two SLIDERS on one of the GRAPHIC EQs to add top end focus and cut.
The middle OPEN (BACK) position takes the lid off the top end so the upper harmonics can shine through and provide a more open,
three-dimensional sound with accentuated brightness. This position works well for clean work and overdriven rhythm applications
where a brighter, “faster”, more urgent response is in order.
The upper CLOSED BACK Mode is voiced to deliver a similar response to a closed back 4x12 with British-style 60 watt speakers and
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