Fender Stereo Amplifier SPL M500 User Manual

POWER AMPLIFIERS  
From Fender Pro Audio  
Owner's Manual for  
SPL-M500  
P/N 050253  
REV B  
 
SPL-M500  
STAGE MONITOR  
POWER AMPLIFIER  
INTRODUCTION  
500 Watts into 2  
Thank you for your purchase of a Fender SPL-M500  
Stage Monitor Power Amplifier. We are sure you will  
Variable high pass filter (12 dB per octave, find it to be a useful and unique product, providing  
sweeping from 12 Hz to 150 Hz)  
years of trouble free service in both permanent and  
portable applications. Although intended primarily  
Variable low pass filter (12 dB per octave, for portable stage monitor use, the SPL-M500 is  
sweeping from 2.5 kHz to 30 kHz)  
also effective in sound reinforcement applications  
where fixed microphones are used and feedback is  
Three independent variable notch filters for a problem.  
feedback control  
Employing a unique design, the SPL-M500 provides  
Built in switchable DELTACOMPCompressor  
Forced air cooling with automatic 2-speed fan  
a powerful tonal control system which fights  
feedback while optimizing sound. This design is  
comprised of a sweepable high pass filter, a  
sweepable low pass filter and three advanced  
Bi-amp patch point connect for versatility in narrow band notch filters.  
larger monitor systems  
This manual is arranged into four sections:  
Balanced TRS phone jack and female 3-pin XLR  
input connectors  
- A description of the SPL-M500 panel features.  
- A section on basic connections and wiring.  
- A guide on operating the SPL-M500.  
- Product specification sheet.  
Rugged road proof” 14 gauge steel chassis  
Two rack space (3.5 in, 8.8cm) chassis  
Optional rear rack supports (P/N 040661)  
WARNING:  
-To reduce the risk of fire or shock hazard, do  
not expose this amplifier to rain or moisture.  
-No user serviceable parts inside, refer  
servicing to qualified personnel only.  
-This amplifier must be earth grounded.  
3
 
DESCRIPTION OF FEATURES  
F
E
INPUT LEVEL LOW NOTCH DEPTH  
MID NOTCH DEPTH  
HIGH NOTCH DEPTH  
6
ON  
POWER  
0dB  
0dB  
-3  
0dB  
16  
120  
+6dB  
225  
2k  
4k  
-3  
-3  
0dB  
FLAT  
150  
700  
70  
430  
4k  
1k  
9k  
LOW FREQ. ROLLOFF  
-6  
12  
-6  
-12  
-6  
-12  
12k  
DELTACOMPTM  
50  
500  
400  
5k  
800  
10k  
4k  
35k  
FREQUENCY  
FREQUENCY  
FREQUENCY  
MAX.  
MAX.  
MAX.  
2k  
FLAT  
POWER  
HIGH FREQ. ROLLOFF  
F
E
E
D
B
A
C
K
C
O
N
T
R
O
L
F
I
L
T
E
R
A
B
B
B
C
C
C
G
I
D
H
FRONT PANEL  
A. INPUT LEVEL CONTROL - Variable attenuator permitted to pass through. Start with this control set  
controls the amplifier's input sensitivity. Control at 30 kHz. If the performers complain of "edgy"  
settings can vary between +8dB (fully up) and infinite sounding monitors and want smoother sounding  
attenuation (fully down). At the full up position, a ones, rotate this control counter clockwise until they  
360mV input signal is required for rated output. At are pleased with the sound.  
0, a 360mV input signal will yield an output power of  
1/8th rated power.  
E. LOW FREQUENCY ROLL OFF CONTROL  
(HIGH PASS FILTER) - Useful for removing rumble  
B. NOTCH FREQUENCY CONTROL - Higher (mechanical noise) or resonance and L.F. leakage.  
notch frequencies are selected as the knobs are When this knob is fully in its counter clockwise  
rotated in the clockwise direction. Each knob position, all input signals above 12Hz are allowed to  
covers a specified frequency range, but two pass. When it is positioned fully clockwise, only  
adjacent knobs do have overlapped frequencies. frequencies above 150 Hz are permitted to enter the  
This feature is intentional. Refer to the "Hints and power amplifier. Start with this control set at 12 Hz.  
Precautions" found on page 7 for details concerning If the performers want crisper sounding sounding  
this feature.  
monitors slowly rotate this control clockwise until  
they are pleased with the sound.  
C. NOTCH DEPTH CONTROL - These sliders  
provide attenuation control for each notch filter  
frequency band. At the highest position, 0dB of  
attenuation is obtained. At the lowest position, they  
can provide more than 25 dB of attenuation at the  
selected frequency. Refer to the "Hints and  
Precautions" found on page 7 for details concerning  
this feature.  
F. POWER LED INDICATOR - LED is illuminated  
when the monitor amplifier is turned on, and the AC  
mains voltage is present. If the indicator does not  
light when the power switch is turned on (and does  
not trip the circuit breaker), check the AC power  
supply and fuse.  
G. DELTACOMPSWITCH - This switch activates  
the internal compressor circuit. Peak clipping is  
minimized when the compressor circuit is active.  
This will also "clamp" feedback, helping protect your  
monitor speakers. During normal operation, keep  
this switch engaged.  
D. HIGH FREQUENCY ROLL OFF CONTROL  
(LOW PASS FILTER) - Useful for smoothing out  
"edgy" sounding speakers. When this knob is fully in  
its clockwise position, all signals below 30 kHz are  
allowed to enter the power amplifier. If set fully  
counter clockwise, only signals below 2.5 kHz will be  
4
 
DO NOT BLOCK FAN OPENING  
TYPE: PR 308  
OUTPUTS  
PATCH POINT  
BALANCED INPUTS  
PARALLEL SPKR. JACKS  
SERIAL NUMBER  
RETURN  
SEND  
900W  
500W  
FUSE  
2  
MIN  
F10A  
250V  
CAUTION:  
CHASSIS SURFACE HOT  
TO REDUCE THE RISK OF FIRE  
TOTAL  
WARNING:  
OR ELECTRIC SHOCK DO NOT EXPOSE THIS  
EQUIPMENT TO RAIN OR MOISTURE  
,
CAUTION:  
ATTEON:  
UTILISER IBLE DE  
RECHANMEME  
TYPE ERE  
CLASS 2 WIRING  
TO REDUCE THE RISK OF  
FIRE, REPLACE FUSE WITH  
SAME TYPE AND RATING  
AVIS:  
RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR  
ATTENTION:  
SUPERFICIE DE CHASSIS CHAUDE  
J
K
L
L
M N  
O
O
H. PEAK LED INDICATOR - The red Peak LED M. PATCH POINT RETURN CONNECTOR -  
Indicator illuminates when the output voltage of the Provides the possibility of using the power amplifier  
amplifier reaches clipping (maximum output voltage). by bypassing the preamp section of the unit. When  
The threshold for the peak indicator automatically this connector is used, the preamp is totally  
adjusts for load impedance and supply voltage disconnected from the power amplifier section. If  
variations.  
nothing is plugged into this jack, it normally takes its  
signal from the preamp output, via the PATCH POINT  
I. POWER SWITCH - The power switch turns the SEND jack. (See section N).  
unit on and off. The LED (item F) is illuminated when  
the amplifier is turned on and main voltage is present. N. PATCH POINT SEND CONNECTOR - This  
connection can be used with the patch point return  
connector, if further signal processing by an external  
unit is desired. Processing could include the  
REAR PANEL  
insertion of a 1/3 octave graphic equalizer for tonal  
J. POWER CORD - The SPL-M500 is equipped  
shaping, an external compressor/limiter and/or the  
with a grounding type supply cord to reduce the  
insertion of an active electronic crossover network  
possibility of shock hazard. Be sure to connect it to  
for bi-amped monitor systems. The output of this  
a grounded AC receptacle. DO NOT ALTER THE  
jack is normally tied to the patch point return  
AC PLUG.  
connector. Using this connector will not disconnect  
the preamp section from the power amplifier section.  
K. EXTERNAL FUSE - When necessary, replace the  
external fuse ONLY with one of the same type and  
O. BALANCED INPUT CONNECTORS - This unit  
rating as shown on the label next to the external fuse  
provides two types of input connectors: a 1/4 inch  
holder.  
TRS and an XLR female connector. The 1/4 inch  
TRS connector polarities are: tip (+), ring (-), and  
sleeve (ground). The XLR female connector  
polarities are: pin 2 (+), pin 3 (-), and pin 1 (ground).  
L. OUTPUT SPEAKER JACKS - Two parallel-wired,  
1/4"output connectors are provided capable of  
providing 500 Watts of power into a 2minimum load  
total. (One 2speaker or two speakers at 4each).  
5
 
BASIC CONNECTIONS and WIRING  
Power and audio signal cables are the most Larger diameter (small gauge number) wire is  
common sources of sound system failure. Well expensive and long cables made from it are heavy.  
made and carefully maintained cables are essential Rather than running long speaker cables, it is better  
to the reliability of the entire system. If long speaker to locate power amplifiers near speakers and run a  
cables are required, make sure the wire is of line-level signal cable over the long distance to the  
sufficient size to transfer all of the available amplifier amplifier. This approach eliminates most of the  
power to the speakers rather than absorbing power signal loss due to speaker cable resistance so the  
itself. As a rule of thumb, the larger the wire the speakers are fed all of the amplifier's power without  
better (larger wire has smaller "gauge numbers").  
the need for heavy cables. In cases where speakers  
and power amplifiers are located far away from the  
Below are two charts listing speaker wire gauges signal source, "balanced line" cables are a wise  
and recommendations for best results.  
choice. Doing so can actually save money.  
The use of stranded wire is highly recommended  
since it is flexible and less prone to metal fatigue  
breakage. If an end is nicked while insulation is  
being stripped for connection, only one or two  
strands will break and not the entire wire.  
SPEAKER WIRE GAUGE  
100'-UP  
10  
12  
12  
14  
8
14  
16  
(30.5 m-UP)  
50'-100'  
10  
12  
14  
NEVER use coiled cords for  
speaker hookup, even in an  
emergency.  
(15.25-30.5 m)  
*25'-50'  
14 *16 18  
(7.60-15.25 m)  
Coiled guitar-type cords usually have higher internal  
resistance than the speakers themselves. This is  
due to the light-gauge wire used to keep the coil  
cords flexible. Unfortunately, these types of cord  
prevent most of the power from reaching the  
speakers. In high power operation, a coil cord can  
melt causing a fire hazard and possible damage to  
the amplifier. As a general rule, both straight and  
coiled guitar-type connecting cords make poor  
speaker cables.  
10'-25'  
16 18  
18 18  
18  
(3.05-7.60 m)  
0'-10'  
16  
18  
(0.00-3.05 m)  
4  
2Ω  
*816Ω  
SPEAKER IMPEDANCE [z]  
*Example - If the speaker wire length  
required is between 25-50 feet (7.60-15.25  
meters) and the speaker impedance is 8,  
the minimum recommended speaker wire  
gauge is 16.  
The SPL-M500 can produce enough power output  
to damage electronic equipment connected to its  
output. Besides being capable of destroying  
speakers, shock and / or fire hazards are also  
possible. High power amplifiers should always be  
properly applied and used with care in a clean and  
dry environment.  
Resistance in per foot  
AWG mm2  
(30.5 cm) @ 77º F (25º C)  
18  
0.83  
.00651  
Be sure to turn on all other equipment before turning  
on the SPL-M500 power amplifier. This will prevent  
turn-on "thumps" from the mixer or other pieces of  
gear that could possibly damage speakers.  
Likewise, the reverse logic should also be applied --  
turn OFF the amplifier FIRST -- when shutting down  
the system.  
.00409  
.00258  
.00162  
.00102  
.00064  
16  
14  
1.32  
2.10  
3.32  
5.27  
8.38  
12  
10  
8
6
 
The SPL-M500 is timed to turn on the speaker 8. If feedback is encountered, slide the appropriate  
outputs after the amplifier's power supply is fully (LOW, MED or HIGH band) notch depth control down to  
charged up, thus preventing any turn-on noise. its lowest position. Next, turn the frequency control  
Timing of the amplifier's turn-on circuit is usually knob to pinpoint the location of the problem  
sufficient to accommodate all the turn-on anomalies frequency and cancel it.  
from other pieces of gear in a system, making it  
acceptable to use a single switched power string in 9. Slide the control level up until feedback or ringing  
a permanent or semi-permanent application.  
is heard, then move down until the feedback or  
ringing stops.  
The SPL-M500 can draw a lot  
of AC power. Be sure the AC 10. Step 8 may need to be performed more than  
power source for your AC distribution system once if several feedback problems occur  
has adequate current capability.  
simultaneously.  
In multiple amplifier installations, a sequential turn-on  
(either manually or via timed relays) is recommended  
to avoid a sudden major drain on the AC line.  
HINTS AND PRECAUTIONS  
Remember, severe reduction of power line voltages A. To reduce the chance of unwanted noise in your  
affects the amount of power you can get FROM the system, keep all patch cables and input signal  
amplifier. If you need to run long AC extension cables away from all AC power cords, lighting  
cords, make sure their conductors are as large as cables and speaker wires. Always use shielded  
practical (small gauge number). Just as smaller cables for all low level (input and patch point)  
diameter wire causes speaker lines loss, smaller connections to this unit. Never use shielded cable  
power lines cause loss. The effect of small AC lines for speaker wires.  
is one of the intermittent clipping under severe  
conditions.  
B. When a problem frequency occurs within the  
overlapping part of the two adjacent frequency  
bands, the notches can be dialed to have the same  
center frequency. By doing so, the resulting notch  
depth provided by the two notches will be deeper  
than a single notch depth.  
AMPLIFIER OPERATION  
1. Turn all equipment OFF.  
2. Plug the AC cord into a power source with the C. When two notches are juxtaposed, the result will  
correct voltage. In the U.S. and Canada, this is a be a wider notch. This can be helpful in some  
120 Volt, 60 Hz AC. In other countries, this voltage cases, but may not be desirable in normal operation  
may vary from 100 to 240 Volts, 50 to 60 Hz AC.  
of the unit as audible frequency loss will occur.  
3. Connect the wiring from the signal source to the D. When notches are not in use, all the notch sliders  
amplifier's input jack(s).  
must be at the top of their travel. A narrow band is  
NOT a graphic equalizer. Do NOT put the notch  
4. Connect the speaker(s) to the to the output depth sliders in the middle of their travel to boost or  
terminals. cut frequencies. These are CUT ONLY controls.  
5. Adjust the input control level to the minimum E. To help prevent overdriving this unit and unwanted  
(infinity) setting. Set the notch sliders at 0 dB (top).  
distortion, keep the Deltacompswitch "in".  
6. Turn all other equipment ON first, then the SPL- F. If you wish to obtain either the optional rear rack  
M500 monitor amplifier.  
ear supports (P/N 040661), please contact your  
local authorized Fender Pro Audio dealer.  
7. Slide the level control slowly up and listen for any  
feedback problem(s) that may occur.  
7
 
SPECIFICATIONS  
DESIGNATION TYPE  
PART NUMBER  
PR 308  
071-5000-070 100V  
071-5000-000 120V  
071-5000-060 230V  
071-5000-040 230V (UK)  
071-5000-030 240V (AUSTRALIA)  
POWER SPECIFICATION  
100V version: 100 VAC, 50-60 Hz 900W  
120V version: 120 VAC, 60 Hz 900W  
230V versions: 230 VAC, 50 Hz 900W  
240V versions: 240 VAC, 50 Hz 900W  
OUTPUT POWER  
At 1 kHz, 0.20% THD  
200W into 8 Ω  
330W into 4 Ω  
500W into 2 Ω  
POWER BANDWIDTH  
20 Hz to 50 kHz, 500W +0, -3dB into 2 Ω  
12 Hz to 28 kHz @ +ø, -3dB  
6.55V / µs  
FREQUENCY RESPONSE  
SLEW RATE  
TOTAL HARMONIC DISTORTION  
DELTACOMP COMPRESSOR RANGE  
HUM AND NOISE  
<0.2% THD, 20 Hz to 20 kHz at rated power into 2 Ω  
18 dB  
200µV into 2 Ω  
105dB below 500W unweighted  
SENSITIVITY (PATCH POINT LEVEL)  
(INPUT LEVEL)  
1.2V for 500W into 2 @1kHz  
360mV for 500W into 2@ 1kHz  
NOTCH FILTER BANDS  
50 Hz to 500 Hz  
400 Hz to 4 kHz  
1 kHz to 10 kHz  
HIGH PASS FILTER RANGE  
LOW PASS FILTER RANGE  
FILTER ALIGNMENT  
Corner frequency variable between 12 Hz and 150 Hz  
Corner frequency variable between 2.5 kHz and 30 kHz  
Sub-Bessel  
NOTCH FILTER ATTENUATION  
FILTER SELECTIVITY FACTOR  
INPUT IMPEDANCE  
Better than -20 dB at any selected notch frequency  
Q = 8  
1/4 in Phone Jack: 21 kunbalanced input  
32 kbalanced input  
XLR Connector: 27 kbalanced input  
DIMENSIONS  
Weight  
Height  
Width  
Depth  
25 lbs. (11.3 kg)  
3.5 in. (8.9 cm)  
19 in. (48.3 cm)  
12.3 in. (31.2 cm)  
THIS EQUIPMENT CONFORMS TO  
THE FOLLOWING DIRECTIVES :  
EMC 89/ 336/ EEC AND LV 73/ 23/ EEC  
A PRODUCT OF:  
FENDER MUSICAL INSTRUMENTS CORP.  
CORONA, CA 91720 USA  
 

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