Ampeg Bass heads SVP1500 User Manual
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Owner’s Guide for the SVP-1500 Rack Mount Bass Power Amplifier SIGNAL LIMIT PROTECT SIGNAL LIMIT PROTECTRESET @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy10A M P Made in the U.S.A. by
SVP-1500 Bass Amplifier 2 Table of Contents Important Safeguards and Precautions . . . . . . . . . . . .2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . .3 The Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 The Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Operation Stereo/Bridged Mono/Parallel Mono Modes . . . . .6 Input/Output Connectors . . . . . . . . . . . . . . . . . . .6 Installations Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Bridged Mono . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Biamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Technical Specifications . . . . . . . . . . . . . . . .back cover Important Safeguards and Precautions All Ampeg products are designed for continuous safe operation, as long as common sense is used and steps are taken to help avoid certain problems. Abiding by the following rules can help prevent damage to your amplifier, yourself and others. •The amplifier is equipped with a three-pronged AC power cord. To reduce the risk of electrical shock, NEVERremove or oth- erwise attempt to defeat the ground pin of the power cord. •Connect the amplifier ONLYto a properly grounded AC outlet of the proper voltage for your amp. •Avoid sudden temperature extremes, rain and moisture. Also, avoid sudden and intense impact. (If the unit has been subjected to any of the preceding abuses, have it looked at by an authorized service center.) •NEVERset the amplifier on a support that might give out under its weight. •Always keep the total speaker impedance at or above the rated load. •Unplug the amplifier before cleaning it. NEVER spray liquid cleaners onto the amplifier. Wipe it with a slightly dampened, lint- free cloth to remove dirt and film. •Don’t use the amplifier if it has sustained damage to the chassis, controls, or power cord. Refer the unit to an authorized ser- vice center for inspection. •Amplifiers capable of producing high volume levels are also capable of inflicting permanent hearing loss or damage, if the expo- sure to such levels is prolonged. Such damage is progressive and irreversible! The chart below shows the U.S. Government Occupational Safety and Health Administration (OSHA) regulations which were in effect at the time of this publication for permissible noise exposure, per 29CRF1910, Table G-16. According to OSHA, any exposure in excess of those listed above could result in some hearing loss. SOUND LEVEL dBA DURATION PER DAY SLOW RESPONSE IN HOURS 90 8 92 6 95 4 97 3 100 2SOUND LEVEL dBA DURATION PER DAY SLOW RESPONSE IN HOURS 102 1-1/2 105 1 110 1/2 115 1/4 or less CAUTIONRISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. ATTENTIONRISQUE DELECTROCUTION NE PAS OUVRIR ATTENTION: POUR REDUIRE DELECTROCUTION NE PAS ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE NEST REPRABLE PAR LUTILISATEUR. POUR TOUTE REPARATION, SADRESSER A UN TECHNICIEN QUALIFIE. VORSICHTELEKTRISCHE SCHLAGGEFAHR NICHT OFFENEN VORSICHT: ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT DEN DECKEL ABENHMEN. INTERNE TEILE KONNEN NICHT VOM BENUTZER GEWARTET WERDEN. DIE WARTUNG IS QUALIFIZIERTEM WARTUNGSPERSONAL ZU UBERLASSEN. THIS EQUIPMENT HAS BEEN DESIGNED AND ENGINEERED TO PROVIDE SAFE AND RELIABLE OPERATION. IN ORDER TO PROLONG THE LIFE OF THE UNIT AND PREVENT ACCIDENTAL DAMAGES OR INJURY, PLEASE FOLLOW THESE PRECAUTIONARY GUIDELINES: CAUTION:TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT OPEN CHASSIS; DO NOT DEFEAT OR REMOVE THE GROUND PIN OF THE POWER CORD; CONNECT ONLY TO A PROPERLY GROUNDED AC POWER OUTLET. WARNING:TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. CAUTION: NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. CAUTION: OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS. CONTINUED EXPOSURE TO HIGH SOUND PRESSURE LEVELS CAN CAUSE PERMANENT HEARING IMPAIRMENT OR LOSS. USER CAUTION IS ADVISED AND EAR PROTECTION IS REC- OMMENDED IF UNIT IS OPERATED AT HIGH VOLUME. IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL REFERREZ-VOUS AU MANUAL DUTILISATION UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN EXPLANATION OF GRAPHICAL SYMBOLS:DANGEROUS VOLTAGE DANGER HAUTE TENSION GEFAHLICHE SPANNUNG= =
SVP-1500 Bass Amplifier 3 An Introduction to your new Ampeg SVP-1500 Rack Mount Bass Amplifier First of all, thank you for choosing one of the finest rack mount bass amplifiers available, the Ampeg SVP-1500. Your new bass amp offers you many outstanding features, such as a rated output of up to 780 watts per channel into 2 ohms, forced fan cooling and a highly-advanced, built-in protection circuit. In order to achieve the highest performance and longest life from your new bass amp, please read this owner’s guide prior to its use. Features In true Ampeg tradition, your new SVP-1500 offers you more power, performance and ease of operation than any other bass amp in its class. Below are some of the outstanding features of your new amplifier – features which set it apart from the competition! •RUGGED AND PORTABLE:Ampeg’s legendary reliability and three-rack-space design fit into most any audio reinforcement system. •BALANCED INPUT JACKS:Balanced 1/4” phone jacks for use with high or low impedance sig- nals. •BUILT-IN LIMITING AND PROTECTION CIRCUITRY:Automatic protection against clipping, over- load conditions, short circuits and overheating. •DUAL OUTPUT JACKS:1/4” phone and Speakon ®jacks for connecting your speakers. *NOTE: 1/4” jacks not available in some areas. System Block Diagram A INPUTS LIMITER POWER AMP STEREOMONO BRIDGEA OUTPUTS SPEAKON ®JACK (A) LIMIT PROTECTION A SENSITIVITY SIGNALFAULTB INPUTS LIMITER POWER AMPB OUTPUTS LIMIT PROTECTION B SENSITIVITY SIGNALFAULT 1+ 2+ 1- 2- 1+ 2+ 1- 2- SPEAKON®JACK (B) SPEAKON ®JACK (MONO BRIDGE/ BIAMP) 1+ 2+ 1- 2-
SVP-1500 Bass Amplifier 4 The Front Panel SIGNAL LIMIT PROTECT SIGNAL LIMIT PROTECTRESET @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy 2342346 71 5 10A M P 1: FRONT PANEL EXHAUST VENT: The SVP-1500 employs a variable- speed internal cooling fan to draw air through the unit to keep it running cool even under extreme operating condi- tions. The air is drawn in through the units rear intake vent (#11) and is forced out through the front panel exhaust vent. This method of cooling draws air out from the interior of the rack and provides more efficient cool- ing than methods which bring air in from the front and exhaust it through the back. Keep this vent clear and free from obstruction at all times to insure proper cooling. 2: SIGNAL INDICATOR LED:This LED will illuminate when signal is detected at the amplifiers output ter- minals, providing accurate visual con- firmation of signal presence, often helpful in hookup and troubleshooting. The level of the signal must be at about 5% of the amplifiers full rated output to make the LED glow. 3: LIMIT INDICATOR LED:The SVP-1500 employs an internal Automatic limit circuit to prevent amplifier clipping. The Limit LED will illuminate whenever the input signal attempts to overdrive the amplifiers output section, indicating that the Limiter has been called upon to pre- vent clipping. (Not only does clippingproduce harsh sounding distortion, it is also capable of damaging speaker components - particularly high fre- quency drivers.) Periodic flashing of the Limit LED indicates operation at or near full output and is no cause for alarm. Steady illumination of the LED indicates constant operation of the Limiter, with the possibility that the input signal should be reduced by means of the Sensitivity control (#13). The Limiter within the SVP-1500 is fully automatic, with no defeat switch, insuring complete protection against clipping at all times. 4: PROTECT INDICATOR LED:This LED will illuminate whenever the inter- nal protection relay on either channel is activated, indicating the possibility of overheating, DC voltage at the outputs, overloads or short circuits. The protec- tion relay is activated for a short period upon initial turn-on and at turn-off to prevent transient spikes from being reproduced through your speakers. If the limit and protect indicators for a channel cycle on and off with a signal applied, this indicates the presence of a short circuit or load impedance less than 2 ohms on the output of that chan- nel (less than 4 ohms in the bridged mono mode). In this case, check all wiring for shorts, check the total con- nected load impedance to be sure it isnot below the amplifier ratings, or check for other potential problems. 5: POWER INDICATOR LED:This LED will illuminate when AC power is applied by means of the Power switch (#7). If the LED fails to illuminate, check the AC outlet or the circuit breaker on the front panel (#6). 6: RESET SWITCH:The SVP-1500 employs an AC line circuit breaker to help protect against damages due to excessive current demands. If the amplifier does not function, check the circuit breaker. If it has opened, the button will be protruding and showing a contrasting color. You may reset it by pressing the button in until it latch- es. The circuit breaker must cool down for a short time before the but- ton will latch. If the circuit breaker opens repeatedly with no signal input, have the amplifier checked by a qual- ified service person. 7: POWER SWITCH:This switch turns the amplifier On in the Up posi- tion and Off in the down position. When AC power is applied to the amplifier, the Power LED indicator (#5) will illuminate.
8: POWER CORD:This heavy duty
power cord must be connected to a
grounded AC outlet of the proper volt-
age for the amplifier to operate. IN
ORDER TO AVOID THE POSSIBILI-
TY OF ELECTRIC SHOCK, DO NOT
REMOVE OR BYPASS THE
GROUND PRONG OF THE POWER
CORD.
9: SPEAKON
®JACKS: These heavy-
duty output jacks offer an excellent
method of connecting the amplifier to
your speakers using cables terminat-
ed with Speakon
®type plugs. Use of
these connectors is highly recom-
mended under high power operation.
When using the amplifier in the Mono
Mode, you MUSTuse the middle
Speakon
®jack. Please refer to pages
6 and 7 for more information.
10: 1/4 PHONE JACK OUTPUTS:
These additional output jacks offer an
alternative method of connecting to
your speakers, using cables terminat-
ed with 1/4 phone plugs. Since these
jacks are not as well suited to high
current applications as the Speakon
®
jacks, they are NOTrecommended for
extended use at high power levels, or
when driving 2 or 4 ohm loads.
NOTE: In some areas 1/4” jacks are not
acceptable for use on amplifiers capa-
ble of high output power levels. For
this reason the 1/4” jacks on your
amplifier may be sealed – use ONLY the
Speakon
®jacks for connecting your
speakers.
11: FAN INTAKE AREA:The internal
cooling fan is mounted directly behind
this cover, drawing cooling air into the
amplifier to help prevent it from run-
ning hot. This area must be kept free
from obstruction!Check the Intake
Area periodically and remove any for-
eign materials if needed.
12: 1/4 PHONE JACK INPUTS:
These jacks accept line level signal
sources by means of cables fitted with
standard 1/4 phone plugs. Low
impedance balanced or unbalanced,
as well as high impedance sources,
are acceptable for these inputs. Low
impedance balanced inputs are to be
wired as follows:
Tip: Signal +
Ring: Signal -
Sleeve: Ground
The input channel circuitry is trans-
formerless electronically balanced,
and requires a line level signal of 1.5V
RMS or greater to drive the amplifier
to full output.
In the Mono Mode, use the Channel A
input jack.
13: LEVEL CONTROLS:These
rotary potentiometers control the level
or gain of each channel, with the fully-
clockwise position of each providing
maximum sensitivity. Normal calibra-
tion of the SVP-1500 to a mixer wouldcause the Limit LED to flash at the
same time that the mixers VU meters
indicate full output, or OVU.
In the Mono Mode, use the Channel A
Level control.
14: MONO / STEREO MODE SWITCH:
This push/push switch selects the
operating mode of the amplifier. In the
out position the amplifier is in the
Stereo Mode; with the switch in the
in position the amplifier is in the
Mono Mode. In the Mono Mode,
Channel A functions as the input
channel; Channel B inputs will be dis-
connected.
NOTE: Caution should be exer-
cised! Improper hookup or mis-
use of the Mode switch could
cause damage to speakers. See
the specific hookup configura-
tions on pages 6 and 7.
SVP-1500 Bass Amplifier
5
The Rear Panel
STEREO MONOMODE
10101212141313
899911
MODEL:
SERIAL:
LINE: V ~ Hz
WATTS: MAXSVP-1500
SVP15OOU12B
120 60
1500
SVP-1500 Bass Amplifier 6 Operation Stereo Mode: The SVP-1500 can be used in the Stereo Mode as two separate amplifier units, each capable of driving loads down to 2 ohms. Each channel operates independently and has its own input connectors, sensitivity level controls, sig- nal indicator LEDS, automatic limiter, fault protection circuitry, power amp, and speaker outputs. In the Stereo Mode, the Mono/Stereo switch (#14 on the rear panel) must be in the OUTposition. Connections to your speakers can be made with either the 1/4” jacks* or the Channel A and B Speakon ®jacks (or both since they are wired in parallel). See the illustration labeled “Stereo Operation” on the facing page. Bridged Mono Mode: The two power amplifiers can be bridged together to form a single, higher-powered amp. In the Bridged Mono Mode, the amplifier uses Channel As input jacks and Sensitivity control; Channel Bs are disconnected. Channel Bs power amp receives its signal from a tap after Channel As Sensitivity control, but prior to Channel Bs Limiter, so each channel is independently protected. To select the Mono Mode, the Mono/Stereo switch (#14 on the rear panel) must be in the INposition. Because both channels are being used (bridged in series), the minimum speak- er load impedance must be 4 ohms. Connections to your speakers must be made with the Mono Bridge (middle) Speakon ®jack. See the illustration labeled “Bridged Mono Mode Operation” on the facing page. Biamp Mode: The SVP-1500 can be used to separately power the lows and highs of a cabinet with biamp inputs or a separate low and high frequency cabinet. For Biamp Operation, the Mono/Stereo switch (#14 on the rear panel) must be in the OUT(stereo) position. Connections to your speakers can be made with either the 1/4” jacks* of the Mono Bridge (middle) Speakon®jack. We suggest using Channel A for the low frequencies and Channel B for the highs. When using a single cabinet with a Speakon ®Biamp Input jack, terminate the end of the speaker cable going to the cabinet with a single Speakon®connector. (Wire the connector according to the pinouts on the cabinet’s input jackplate label or in its owners manual). If the cabinet has 1/4” Biamp Low and Biamp High Input jacks, or when using separate cabinets for lows and highs, the end of the speaker cable going to the cabinet must be terminated with two 1/4” connectors – one for the highs, one for the lows. (A pigtail connector and/or other adapters may be used to split the low and high speaker wires going to the cabinets.) See the illustration labeled “Stereo Operation” on the facing page. Input Connectors: The SVP-1500 uses balanced 1/4 phone jacks as input connectors. These inputs accept High or Low impedance and balanced or unbalanced signals. A stereo 1/4 plug (ring/tip/sleeve) must be used to feed a high impedance balanced signal into the amplifier. In the Mono Mode, Channel A’s input jack is used; Channel Bs input jack is dis- connected. Speaker Output Connectors: Each channel of the SVP-1500 has both a 1/4 phone jack* and a Speakon®jack. A third Speakon®jack is pro- vided for Mono Bridged use. The Speakon®jacks are more reliable for extended use at high power levels, and their use is always recommended over the 1/4” phone jacks. On each channel, the Channel A and B Speakon ®jacks are wired in parallel with the 1/4 phone jacks: the tip of the 1/4 jack is connected to pin 1+ of the Speakon®jack and the sleeve is connected to pin 1–. Use of both the 1/4 jack and the Speakon®jacks simultaneously to connect two cabinets in parallel is possible, providing proper polarity is observed. The SVP-1500’s Mono Bridge (middle) Speakon ®jack is wired as follows: Pins 1+ and 1– = Channel B+ and – respectively; pins 2+ and 2– = Channel A + and – respectively. *NOTE: 1/4” jacks not available in some areas.
SVP-1500 Bass Amplifier
7
Installations
STEREO MONOMODE
MODEL:
SERIAL:
LINE: V ~ Hz
WATTS: MAXSVP-1500
SVP15OOU12B
120 60
1500
Bridged Mono Mode Operation:
Biamp Operation:
Stereo Operation:
From
Preamps
Right Out Right
Cabinet
Left
Cabinet
OUT(STEREO)From Speakon® Jacks
From 1/4 Jacks*
From
Preamps
Left Out
STEREO MONOMODE
MODEL:
SERIAL:
LINE: V ~ Hz
WATTS: MAXSVP-1500
SVP15OOU12B
120 60
1500
IN(MONO)
From Bridged Mono/Biamp Speakon® JackFrom
Preamps
Main Out
High Power
Cabinet
WARNING! Due to higher
power output per speaker,
use caution in setting levels.
STEREO MONOMODE
MODEL:
SERIAL:
LINE: V ~ Hz
WATTS: MAXSVP-1500
SVP15OOU12B
120 60
1500
OUT(STEREO)
From Bridged Mono/Biamp Speakon® Jack
To Biamp Input
Speakon
® Jack
From CH.B
1/4 jack*
From CH.A 1/4 jack*
*NOTE: 1/4 jacks not available in some areas. To HIGH IN/HF cabinet
PINS 2+,2–
From Amps
Bridged Mono/
Biamp Jack PINS 1+,1–To LOW IN/LF cabinet
From
Crossovers
LOW OUTFrom
Crossovers
HIGH OUT
Biamp Cabinet or
Low and High Cabinets**
**May
require
pigtail
connectors
or other
adapters –
see
cabinet(s)
for pin
configurations
and other
considerations.
HF
Cab
IN
LF
Cab
IN
P/N 47-655-12 . 03/97 Ampeg reserves the right to change specifications without notice. Ampeg is proudly Made in America. ©1996 SLM Electronics, 1400 Ferguson Avenue, St. Louis, MO 63133 U.S.A. SVP-1500 Bass Amplifier Technical Specifications POWER OUTPUTS (per channel, stereo mode)1,2 2 ch (20-20kHz)2 ch 1kHz2 ch 40Hz (1 cycle)1 ch 1 kHz1 ch 40Hz (1 cycle) 8 ohms:230 watts 260 watts 280 watts 295 watts 300 watts 4 ohms:425 watts 480 watts 500 watts 550 watts 2 ohms:560 watts 780 watts 750 watts 900 watts POWER OUTPUTS (mono mode)1,2 20-20kHz1kHz40Hz (1 cycle) 16 ohms:460 watts 520 watts 560 watts 8 ohms:850 watts 960 watts 4 ohms:1120 watts 1560 watts FREQUENCY RESPONSE+0, -.8dB / 20Hz - 20kHz @ 230 W / channel @ 8 ohms TOTAL HARMONIC DISTORTIONLess than .25%, 20Hz - 20kHz @230 W / channel @ 8 ohms SLEW RATE130 volts / microsecond (stereo mode), 60 volts / microsecond (mono mode) SIGNAL TO NOISE RATIO1,2Greater than -100dB from 230 watts / 8 ohms INPUT TYPE AND IMPEDANCETransformerless electronically balanced, 20K actual load impedance. Suitable for Low or High-Z balanced line. One (1) 1/4” phone jack per channel. INPUT SENSITIVITY1.5 V RMS for 230 Watts / 8 ohms LOAD IMPEDANCEStereo Mode: 2 ohms or greater; Bridged Mono Mode: 4 ohms or greater DAMPING FACTOR1Typical 250 (1kHz, 8 ohms) OUTPUT CONNECTIONS1/4” phone jack*, plus Speakon®jacks each channel; Speakon®jack for Mono Bridge/Biamp PROTECTION CIRCUITRYShort circuit, RF burnout, overtemp, turn on/off transient and DC protection, Speaker protection relays, built-in auto limiter (Anti-clip) COOLINGForced air fan cooling, rear intake, front exhaust POWER REQUIREMENTS115VAC 60Hz, 880VA 100/110VAC 50/60Hz, 880VA 230VAC, 50/60Hz, 880VA CIRCUIT BREAKER10 amp (mains) SIZE AND WEIGHT19” W x 5.25” H x 12.5” D; 33 lbs. 483mm x 133mm x 317mm; 15Kg. 1typical performance 2@115 VAC 60Hz *NOTE: 1/4” jacks not available in some areas.