Galaxy Audio HOT SPOT, HOT SPOT VC, MICRO SPOT VC, PA5X140 User Manual
HOT SPOT, HOT SPOT VC,
MICRO SPOT VC, PA5X140,
POWERED MICRO SPOT
TABLE OF CONTENTS
WELCOME...................................................................................
BEFORE YOU BEGIN..................................................................
.............................................
SOUND REINFORCEMENT BASICS..........................................
HOT SPOT SERIES/MICRO SPOT VC.......................................
POWERED HOT SPOT (PA5X140)............................................
USING THE PA5X140..................................................................
USING THE HOT SPOT WITH THE PA5X140............................
STAND MOUNTING.....................................................................
MOUNTING YOUR MICRO SPOT SERIES SPEAKERS............
SPECIFICATIONS........................................................................
WARRANTY..................................................................................
REGISTRATION...........................................................................
OHM’S LAW AND THE HOT SPOT
1
2
2
5
6
8
8
10
10
11
12
14
17
GALAXY AUDIO
User Guide
Welcome
Congratulations on your purchase of a Galaxy Audio Product!
Backed by over 25 years of proven real-world performance and a
3year warranty, the product you have selected is one of the finest
personal monitoring devices available. Thank you for choosing
Galaxy Audio.
For full specifications of Galaxy Audio products,
visit www.galaxyaudio.com
Fill this out and retain for your records
Model: ________________________________________
Serial number:__________________________________
Purchased from: ________________________________
Purchase date: _________________________________
CAUTION: THESE PRODUCTS ARE CAPABLE OF PRODUCING SOUND
PRESSURE LEVELS WHICH MAY CAUSE PERMANENT HEARING DAMAGE
AFTER PROLONGED EXPOSURE.
WARNING! TO PREVENT THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. TO PREVENT
THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. NO USER
SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
This symbol indicates that a dangerous voltage constituting a risk of
electric shock is present within this unit.
Page 1
To contact Galaxy Audio
call 1-800-369-7768
write to P.O. BOX 16285
Wichita, Ks 67216-0285
or visit www.galaxyaudio.com
This symbol indicates that there are important operating and
maintenance instructions in the literature accompanying this unit.
Page 2
BEFORE YOU BEGIN
Before using this product be sure to read and understand all
instructions in this manual pertaining to the model(s) you have
purchased.
DO...
Read this manual
Use a unidirectional microphone
Handle with care
Complete the registration card at the back of the manual
DON’T...
Expose any unit covered in this manual to rain or moisture
Plug-in or unplug the HOT SPOT while it is operating
(doing so may damage your amplifier)
(call Galaxy Audio for the
nearest authorized repair center). Failure to do so may
void your warranty.
Attempt to make any repairs
OHM’S LAW AND THE HOT SPOT
All unpowered HOT SPOTS have a 16 ohm impedance, and like
most professional-type speakers have two jacks which are wired in
parallel (meaning the signal can travel into one jack and out of the
other).Think of each speaker as a “load” added to the amplifier. The
greater the number of speakers, the heavier the load. Adding too
many speakers can overload the amplifier, causing it to overheat
and distort. If the amplifier begins to distort, or if it becomes hot to
the touch, disconnect any extra speakers. One easy way to
determine the load on the amplifier is to use Ohm’s law, which
“
states: “The total impedance of N speakers in parallel is equal to
the reciprocal of the sum of the reciprocals. In equation form:
Page 3
This equation may be used to calculate the equivalent impedance
for additional speakers in two-speaker increments. Determine the
impedance of the first two speakers, substitute Z total for Z , and
include the next speaker. Repeat the process until all speakers
have been included. The result should be the same as with the first
method. A word of caution: polarity rules must be observed when
connecting multiple speakers. Polarity will not affect the Z, but can
affect the quality and volume of the sound. If you are having
problems with any of these applications use Galaxy Audio’s
CRICKET Polarity and Continuity Test Set to check the polarity of
your cables.
EXAMPLE 2:
As long as all of the speakers have the same impedance rating, the
equivalent impedance of the system is the rated impedance of one
speaker divided by the number of equivalent speakers.
Z=
Z x Z
12
Z + Z
12
Where Z1 is the impedance (or ohm rating) for the first speaker, Z2
for the second, and so on, for every speaker in the chain. This
equation calculates the total impedance of the speaker system,
which should NOT be lower than the minimum impedance rating of
the amplifier.
EXAMPLE 1:
For one pair of speakers use the short form of the equation: the
product of the two speakers divided by the sum of the two
speakers is equal to the total impedance or the equivalent
impedance of the speaker system.
Z(Total)=
1
1 1 1 1 1
___ ___ ___ ___ ___
+ + + +
Z Z Z Z Z
1 234N
Z= = 8 Ohms for two HOT SPOTS
16 x 16
16 + 16
Z= = 5.33 Ohms for three HOT SPOTS
8
8
x 16
+ 16
Z= = 4 Ohms (the total load)
5.33
5.33
x 16
+ 16
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