Mesa/Boogie JP-2C Owner'S Manual Download Page 28

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SPEAKERS

The full compliment of SPEAKER Outputs provided here in the JP-2C ensures you can always get the best performance

from your amplifier, regardless of Cabinet requirements. Two 4 Ohm, One 8 Ohm and One 16 Ohm jacks are provided covering the
widest variety of impedance needs in the fewest amount of jacks, important for an amplifier that is this powerful and yet this compact.

The most common MESA cabinet setup by far remains one 8 Ohm Cabinet connected to the 8 Ohm SPEAKER
Output. We have found–and still feel–the best response in terms of frequency blend, punch, balance and
power is achieved with this nominal impedance. Most MESA 1x12, 2x12 and 4x12 Speaker Enclosures are
wired for 8 Ohms for this very reason. However there are some nice differences available in deviating from
this scheme as well and you are encouraged to experiment until you find the cabinet setup and sound that best

suits your tastes. The one thing you must ALWAYS DO, is make sure that you HAVE A CORRESPONDING LOAD CONNECTED AT
ALL TIMES TO ONE OF THE SPEAKER OUTPUTS!!!

The ONLY time it is safe (but NOT RECOMMENDED), to run the amplifier with no Load connected to a SPEAKER Output is when
you are using the CABCLONE D.I. to record Direct and the SPKR ON/OFF switch in the CABCLONE Section is set to SPKR OFF
(switch down). Even THEN, we HIGHLY RECOMMEND keeping a cabinet connected at all times… just in case someone ELSE (Tech,
Recording Engineer, etc.) starts flipping switches on the Rear Panel of your amplifier.

Below are some common and correct SPEAKER Output Connection Examples;

• One 8 Ohm Cabinet – To 8 Ohm SPEAKER Output (One MESA 8 Ohm Cabinet).
• Two 8 Ohm Cabinets – Each to a separate 4 Ohm SPEAKER Output or One Cabinet to PARALLEL Input on MESA Speaker

Cabinet and 2nd Cabinet to other PARALLEL jack On MESA Cabinet.

•  One 4 Ohm Cabinet – To 4 Ohm speaker output. (Any 4 Ohm Cabinet)
•  Two 4 Ohm Cabinets – NOT RECOMMENDED! Output Transformer NOT setup to run on 2 Ohm Load.
•  One 16 Ohm Cabinet – To 16 Ohm SPEAKER Output.

• Two 16 Ohm Cabinets – Uses Parallel box or “Y” connector to 8 Ohm SPEAKER Output.

These common Cabinet connection scenarios will cover most of the widely used setups you will run into. There are likely others less
common that we have not identified here, and some may also be safe and unique sounding. Feel free to call us if you are concerned
as it is always better to be safe than sorry when it comes to ensuring proper loading of an expensive amplifier/ piece of equipment like
the JP-2C. Our Product Specialists will be happy to guide you and/or get you the proper information regarding this important topic.

FX (LOOP – SERIES)

These two ¼” jacks provide the interfacing patch points for your processing needs. The Effects Loop is

basically a circuit bridge from the end of the preamp to the Driver stage, with the SEND interrupting the signal at the preamp’s end
and the RETURN feeding the power section just before the Driver tube.

Using this patch point usually ensures the best sonic performance as well as signal to noise ratio with your outboard processors.

That said, it is important to point out that this is a critical junction in the JP-2C’s circuit path and whatever is inserted
here can have an effect on the overall performance of the amplifier.

The Effects Loop is a Series Loop, meaning that the entire signal goes through it, unlike a Parallel Loop where a
percentage of the unaffected pure signal is taken around the Loop. Therefore, the quality of the devices used in the
Loop and their performance is critical to achieving the best sound and performance from your amplifier. We recom-
mend auditioning any processor with your JP-2C BEFORE buying it to ensure it delivers a good match in performance.

One clue is price. Like in any segment of the marketplace, you get what you pay for most times and there is a wide range of quality in
regards to both build and sonic performance. While technology has raced ahead at a frightening pace and features are at an all time
pinnacle, it is sound and feel you’ve likely chosen your amplifier for, and therefore we recommend a similar degree of discretion when
it comes to choosing your processing devices and ultimately,… what you will insert in the middle of your pure analog tube amplifier.

120 V

60 Hz

4 A

SLO

BLO

AMPLIFIER

44YV

FUSE

CH 3

CH 2

CH 1

SLA