Ampeg Bass Amplifier BA115 User Manual

							BA115
BASS AMPLIFIER
Owner’s Manual 
						

							TOP PANEL:
BA115 BASS AMPLIFIER
HEADPHONES LINE OUTPOWERCD INPUTGAIN MASTER STYLE TREBLE ULTRA MID BASS12 3450dB -15dB
INPUT
ON
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1. 0dB INPUT:Connect your “passive”
bass guitar here using a shielded instru-
ment cable. This input is not padded and
is best suited for basses without active
electronics or “hot” pickups.
2. -15dB INPUT: Connect your “active”
bass here using a shielded instrument
cable. This input is padded 15dB and is
best suited for basses with active elec-
tronics and/or “hot” pickups.
3. GAIN: Use this control in conjunction
with your instrument’s volume controls to
adjust the level of the signal sent to the
preamp.
4. MASTER:Use this control to adjust
the overall listening level of the amplifier.
This control is also used to adjust the sig-
nal level at the Line Out jack (#11).
5. STYLE:This five-position switch is
used to control the tone of the amplifier.
Please refer to the TECHNICAL SPECI-
FICATIONS on the back page of this
manual for an explanation of the function
of each position. Experiment with the
Style and other eq controls (#6,7,8) for
the results which suit you best.
6. TREBLE:This control is used in con-
junction with the style control to adjust
the high frequency level of the amplifier.7. ULTRA MID:This control is used in
conjunction with the style control to
adjust the midrange level of the amplifier.
8. BASS:This control is used in con-
junction with the style control to adjust
the low frequency level of the amplifier.
9. CD INPUT:These jacks (RCA type)
are used to connect the line level (or
headphones) output of a CD player or
tape deck. The inputs to these jacks are
summed into a mono signal which is fed
into the BA115 just prior to its power
amplifier. Use the volume control on the
CD or tape player to control the output
level.
10. HEADPHONES:The internal speak-
er is disconnected when the head-
phones jack is used.
11. LINE OUT:This jack supplies a post-
eq, balanced line level signal for con-
necting to a house sound board, record-
ing unit or external amplifier. The ampli-
tude of this signal is adjusted by the
Master control (#4).
12. ON LED:This LED is illuminated
when the amplifier is plugged in and
turned on.
13. POWER:This switch is used to turn
the amplifier on or off. 
						

							BA115 BASS AMPLIFIER
IMPORTANT SAFEGUARDS AND PRECAUTIONS:
All Ampeg products are designed for continuous safe operation. Abiding by the fol-
lowing 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 otherwise attempt to defeat
the ground pin of the power cord.
•Connect the amplifier ONLYto a properly grounded AC outlet of the prop-
er voltage for your  amp. 
•Avoid sudden temperature extremes, rain and moisture. Also, avoid sud-
den and intense impact. (If the unit has been subjected to any of the pre-
ceding abuses, have it looked at by an authorized service center.)
•NEVERset the amplifier on a support that will not bear 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.
•DO NOTuse the amplifier if it has sustained damage to the chassis, con-
trols, or power cord. Refer the unit to an authorized service center for
inspection.
•Prolonged exposure to high volume levels may cause permanent hearing
loss or damage. Such damage is progressive and irreversible! 
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 RECOMMENDED IF UNIT IS
OPERATED AT HIGH  VOLUME.
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.
IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL
“ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES.”
REFERREZ-VOUS AU MANUAL DUTILISATION
UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGENEXPLANATION OF GRAPHICAL SYMBOLS:
EXPLICACION DE SIMBOLOS GRAFICOS:
EXPLICATION DES SYMBÔLES GRAPHIQUES:DANGEROUS VOLTAGE
“VOLTAJE PELIGROSO”
DANGER HAUTE TENSION
GEFAHLICHE SPANNUNG==
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. 
						

							www.ampeg.com
Ampeg is proudly Made in America.
©1999 SLM Electronics, 1400 Ferguson Avenue, St. Louis, MO 63133 U.S.A.
TECHNICAL SPECIFICATIONS:
OUTPUT POWER RATING100 Watts at 4 ohms
MAX INPUT LEVELS0dB Input: 1.75V RMS
-15dB Input: 9.75V RMS
CD Input: 5V RMS
LINE OUT LEVEL120mV RMS
HEADPHONE OUT LEVEL3.75V RMS
GAIN39dB  
STYLE1 = -25dB @500Hz
2 = -12dB @500Hz
3 = flat
4 = +5dB @2kHz and above
5 = -6dB @50Hz and below
TREBLE40dB range @10kHz
ULTRA MID30dB range @500Hz
BASS36dB range @50Hz
SPEAKER SPECS15”, 150 w, 4 ohm, 2.5” voice coil dia., 56 oz. magnet;
Piezo tweeter
POWER REQUIREMENTS120VAC, 60Hz,  70VA
100/115VAC, 50/60Hz, 70VA
230VAC, 50/60Hz, 70VA
SIZE AND WEIGHT21” W x 21” H x 15-1/2” D; 62 lbs.
Ampeg continually develops new products, as well as improves existing ones. For this reason,
the specifications and information in this manual are subject to change without notice.
47-054-02 • 05/99
0dB
INPUT
-15dB
INPUT
GAINMIXERSPEAKER
STYLE
BASSULTRA
MIDTREBLE
CD
INPUTSMASTER
TONE CIRCUITS
LIMITER
& POWER AMP
LINE
OUT
HEAD
PHONE
L
R
SYSTEM BLOCK DIAGRAM:
BA115 BASS AMPLIFIER