Phonic MAX 250, MAX 500 User’s Manual
MAX 250
MAX 500
MAX 250
MAX 500
User's Manual
Manual del Usuario
English Español
MAX 250
MAX 500
POWER AMPLIFIER
AMPLIFICADOR DE POTENCIA
ENGLISH .....................................I
ESPAÑOL .....................................II
V1.1 10/17/2012
USER'S MANUAL
CONTENTS
English
INTRODUCTION
FEATURES
PRECAUTIONS
FRONT PANEL
BACK PANEL
SPECIFICATIONS
APPENDIX
APPLICATIONS
BLOCK DIAGRAMS
Phonic preserves the right to improve or alter any information within this
document without prior notice
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IMPORTANT SAFETY INSTRUCTIONS
The apparatus shall not be exposed to dripping or splashing and that no objects
English
shall be placed on the apparatus. The MAINS plug is used as the disconnect device, the disconnect device shall
remain readily operable.
Warning: the user shall not place this apparatus in the
can be easily accessible.
1. Read these instructions before operating this
apparatus.
2. Keep these instructions for future reference.
3. Heed all warnings to ensure safe operation.
4. Follow all instructions provided in this document.
5. Do not use this apparatus near water or in locations
where condensation may occur.
6. Clean only with dry cloth. Do not use aerosol or liquid
cleaners. Unplug this apparatus before cleaning.
7. Do not block any of the ventilation openings. Install
in accordance with the manufacturer
8. Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including
9. Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug
has two blades and a third grounding prong. The wide
blade or the third prong is provided for your safety. If
the provided plug does not
an electrician for replacement of the obsolete outlet.
í
s instructions.
.
into your outlet, consult
with liquids, such as vases,
area during the operation so that the mains switch
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK)
NO USER SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED PERSONNEL
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
ì
presence of uninsulated
product
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magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is in-
tended to alert the user to the presence of important operat-
ing and maintenance (servicing) instructions in the literature
accompanying the appliance.
WARNING: To reduce the risk of or electric shock, do
not expose this apparatus to rain or moisture.
dangerous voltageî within the
10. Protect the power cord from being walked on or
pinched particularly at plug, convenience receptacles,
and the point where they exit from the apparatus.
11. Only use attachments/accessories
by the
manufacturer.
12. Use only with a cart, stand, tripod, bracket, or
table
by the manufacturer, or sold with
the apparatus. When a cart is used, use caution
when moving the cart/apparatus
combination to avoid injury from tipover.
13. Unplug this apparatus during lighting
storms or when unused for long
periods of time.
14. Refer all servicing to
service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate
normally, or has been dropped.
CAUTION: Use of controls or adjustments or performance
of procedures other than those
may result in
hazardous radiation exposure.
INTRODUCTION
Congratulations on your purchase of the Phonic MAX250 or
MAX500 Power Amplier. Like other Phonic MAX ampliers, these
units are designed to provide a good combination of power, audio
clarity, reliability and durability. The MAX speakers were specially
optimized for studio monitoring applications and moderate-power
live performance setups.
Please be reminded that a power amplier is a high-current, high-
power device and should be treated with respect and care. Please
read this manual before connecting and operating your unit and
le it in a safe place for future reference.
FEATURES
240 watts per channel into 4 ohms, 180 watts per channel
into 8 ohms (MAX500)
160 watts per channel into 4 ohms, 120 watts per channel
into 8 ohms (MAX250)
Front panel LED indicators for clip & signal
Front panel Protect LED on the MAX500
Detented dB gain controls
Built-in protection system for short circuit, DC and
temperature monitoring
Power-up muting
-26dB signal presence LEDs on each channel
Input connectors accept XLR and TRS phone jacks
Stereo/Parallel switch
Ground/Floating switch
Massive, custom-designed extruded heatsinks (individual
for each channel) for cool operation
No ventilation fan is needed, allowing for quiet operation
and reduced ambient noise in the studio
Extremely low noise and distortion, suitable for quiet
applications such as recording studio, church and
museum
PRECAUTIONS
1. When rst powering-up the amp, keep the amplier Gain
Controls all the way off, in order to block potentially damaging
or annoying sounds caused by defective cables or hookups.
When turning up the Gain, do it gradually, until normal
operation is veried. These precautions are necessary with
all high-power ampliers, since they have enough power to
blow most speakers in abnormal situations
2. Check the AC Voltage before connecting the AC plug.
3. The amplier is protected from surges in power-line voltage
by the fuses. Should your unit ever fail to power-up, rst
unplug the power cord, and then replace the fuse with exact
type and value.
English
1MAX250 / MAX500
English
FRONT PANEL
1. Gain Controls
These two knobs are the level controls for Channel one and two
respectively. Turning clockwise will increase its gain, and counterclockwise will decrease its gain. Please always power-up with the
volume all the way down, and increase volume slowly to make
sure that no conditions exist which could annoy your audience or
harm your speakers
2. Protect LED Indicator (MAX500 only)
The MAX500 features several types of protection to prevent
damage to the circuitry during turn-on or fault conditions. If the
LEDs light up, this indicates that one of the various protections is
safeguarding the different sections of the amplier and in these
cases, the power output is normally switched off until normal
operating conditions are restored.
Loudspeaker protection: in the event of malfunction, a sensor
located on the power outputs is able to break the circuit
avoiding that current peaks reach the speakers and damage
them.
Thermal protection on the heatsink: If the amp overheats,
thermal shutdown protects the circuitry until the temperature
is reduced to a safe level.
Short circuit protection: The Protect LED Indicator will also
light up if the speaker terminals are short circuited, or the
impedance of the load is too low. In these circumstances, the
Protect LED will stay on until the fault condition is rectied.
Some protection situations require the amplifier to be
switched off and then back on for normal operating conditions
to be restored.
3. Limit/Clip Indicator
This LED lights up during clipping status, whenever any conditions
occur that could leak to non-linearility, such as an out-of-spec
load and waveform distortion. Because of the MAX’s ability to
enter and exit clipping with as few audible artifacts as possible,
you may not hear any distortion even if the indicator ashes. In
general, a few ashes every now and then will not be a problem.
However, if the LEDs ash often or remain on for any extended
period of time, then turn the volume controls down to reduce the
signal level going into the MAX. If this doesn’t solve the problem,
check your output cables and speakers.
4. Signal Indicator
Each channel of the MAX features a signal LED to show that there
is an audio signal at the input to the channel. The threshold for
the indicator is -26 dB, which should be enough to avoid noise
triggering the LED.
5. Power Switch and Indicator
This is the power on/off switch with an LED indicator.
Always start with Gain Control (1) all the way down before
powering-up to avoid abnormal sound from defective cables
or hookups.
2 MAX250 / MAX500
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