Mackie PPM608 User Manual download pdf (Page 22)

PPM608

42. PHANTOM SWITCH

Press in this switch to add phantom power to all the

XLR microphone inputs of the mixer. This lets the mixer

send low-current DC voltage to the mic’s electronics

through the same wires that carry audio. The LED will

turn on as a reminder that phantom power is engaged.

Most modern professional condenser mics are

equipped for phantom power. Semi-pro condenser mics

often have batteries to accomplish the same thing.

“Phantom” owes its name to an ability to be “unseen”

by dynamic mics (Shure SM57/SM58, for instance),

which don’t need external power and aren’t affected by

it anyway.

Never plug single-ended (unbalanced)

micro phones, or ribbon mics into the mic

input jacks if phantom power is on.

Do not plug instrument outputs into the mic

input jacks with phantom power on unless you

know for certain it is safe to do so.

43. PRECISION PASSIVE EQ

If you are using Mackie passive speakers such as

the C200, C300z, S408, S215, and S225, then press this

switch for enhanced clarity and low-frequency response.

If you are not using Mackie speakers, then press it

anyway and listen for an improvement. The passive EQ

circuit is added just before the internal power

ampliﬁers, so only loudspeakers connected to

the rear panel speaker-level outputs [3] will

be affected.

44. POWER AMP LIMITER LEDs

These independent LEDs turn on when

power ampliﬁer channel A or B is being

overloaded internally and its internal

automatic limiter (which is always in the

signal path) is actively working. The LED

will pulse in time with how much the limiter

is being used in the signal path.

If the Limiter LEDs come on and

stay on for more than a second or

two, it means the power supply

has overheated and the limiter is holding

the amp signal down to 1/4 power until the

power supply cools down enough to release

the limiter. If this happens, check there is

good ventilation around the mixer, and that

you are not cranking it too much. Also make

sure that your speakers are OK, and are not

less than 4 ohms impedance.

Stereo Effects Processor

The Mackie Running-Man 32-bit internal effects

processor is a mono-in, stereo-out effects processor,

with 24 presets. It is fed by adjusting the FX/mon 2

control [22] on each channel.

The output from the processor can be added to the

main mix or monitor 1 mix by adjusting the FX to main

[33] and FX to mon 1 [38] controls.

This processor is also doing the calculations that hold

together the very fabric of the space-time continuum

(or at least the lunch-time portion of it).

45. FX/MON 2 SEND MASTER

Use this knob to control the level of the signals going

into the internal effects processor. Adjust it carefully,

with your inner magical eye on the adjacent SIG/OL

LED [46] to prevent overloading the effects processor.

It also affects the level going out of the FX/mon 2 line

level output [15], and the internal power ampliﬁer if it

is playing monitor 2.

46. SIG/OL LED

This dual-LED illuminates in green when the signal

level going into the effects processor is in a good

operating range (SIG). It illuminates in red when the

effects processor is being overloaded with too strong a

signal (OL). Turn down the level [45] if it is.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 31 32

Comments to this Manuals

No comments

Mackie PPM608 User Manual Page 22

Comments to this Manuals

Related products and manuals for Musical Instruments Mackie PPM608