AMPEG J-12T User Manual

J-12T TECHNICAL SPECIFICATIONS

OUTPUT POWER RATING 15 Watts RMS @ 5 % THD 8 ohm load 120 VAC
SIGNAL TO NOISE RATIO 70dB Typical
POWER REQUIREMENTS Domestic: 750mA, 100/120 VAC, 60 Hz

Export: 375mA, 220/240 VAC, 50 Hz

GAIN 62 dB
TONE 30 dB Boost and Cut @ 4 kHz
SPEAKER SPECS 12”, 20 w, 8 ohm, 1” voice coil diameter, 15 oz. magnet
SIZE AND WEIGHT 18.75” W x 16” H x 10” D

30 lbs.

THIS EQUIPMENT HAS BEEN DESIGNED AND ENGINEERED TO PROVIDE SAFE AND RELIABLE OPERATION. IN ORDER TO PROLONG THE LIFE OF
THE UNIT AND PREVENT ACCIDENTALDAMAGES OR INJURY, PLEASE FOLLOW THESE PRECAUTIONARYGUIDELINES:

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT OPEN CHASSIS; DO NOT DEFEATOR 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: IF YOU USE AUDIO AMPLIFIERS PROFESSIONALLYOR IN WORK RELATED SITUATIONS AS AN EMPLOYEE, THE OCCUPATIONAL SAFETY

AND HEALTH ADMINISTRATION (OSHA) HAS SPECIFIED REGULATIONS CONCERNING PROLONGED EXPOSURE TO HIGH SOUND PRESSURE LEV­ELS. PLEASE REFER TO THE CODE OF FEDERAL REGULATIONS DOCUMENT29CFR1910 FOR ADDITIONALINFORMATION.

CAUTION

RISK 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.

ATTENTION

RISQUE D'ELECTROCUTION

NE PAS OUVRIR

ATTENTION: POUR REDUIRE D'ELECTROCUTION NE PAS

ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE N'EST REPRABLE

PAR L'UTILISATEUR. POUR TOUTE REPARATION, S'ADRESSER A UN

TECHNICIEN QUALIFIE.

VORSICHT

ELEKTRISCHE 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.

"IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL"
"REFERREZ-VOUS AU MANUAL D'UTILISATION"
"UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN"

EXPLANATION OF
GRAPHICAL SYMBOLS:

"DANGEROUS VOLTAGE"
"DANGER HAUTE TENSION"
"GEFAHLICHE SPANNUNG"

=

=

Specs and other information subject to change without notice.

Ampeg is proudly Made in America. Aproduct of SLM Electronics, 1400 Ferguson Avenue, St. Louis, MO 63133 U.S.A.

47-277-02 • 12-95

MODEL J-12TMODEL J-12T

GUITAR ACCORDION

VOLUME

0

1

2

3

4

5

6

7

8

9

10

ON

OFF

TONEB

0

1

2

3

4

5

6

7

8

9

10

SPEED

0

1

2

3

4

5

6

7

8

9

10

INTENSITY

TREMOLO

0

1

2

3

4

5

6

7

8

9

10

JET II

T DIMENSION

REVERB

0

1

2

3

4

5

6

7

8

9

10

1 2 3 4 5 6 7 8 9

Thank you for selecting the Ampeg Classic Jet guitar amplifier. Revived from the sixties and ready for the nineties, this easy-to-use
amplifier represents Ampeg’s quest to provide you the finest instrument amplification systems available. In order to get the most
out of your new amplifier, please read these instructions before its use.

THE FRONT PANEL:

1. Guitar Input accepts a stan­dard 1/4” instrument plug from
your electric guitar. This input is at
0dB level.

2. Accordion Input accepts a
standard 1/4” instrument plug from
high output electronic instruments.
This input is padded 6dB to com­pensate for higher output sources.

3. V olume controls the overall out­put level of the amplifier. At lower
volume settings the sound will be
clean. As you push the volume
higher and crank your guitar the
sound becomes distorted.

4. Tone controls the overall tonal
character of the amplifier. Rotating
the knob toward the “T” increases
the higher frequencies, giving a
brighter, more “crisp” sound.
Rotating the control towards the
“B” reduces the high frequencies,
giving a darker, more “muffled”
sound. The Tone control offers a
cut or boost of 30dB at 4kHz.

5. Tremolo-Speed sets the rate at
which the tremolo effect “vibrates.”
The Tremolo-Intensity control (#6)
must be turned up to hear the
effects of this knob’s setting.

6. Tremolo-Intensity sets the
depth of the tremolo effect. For
slow, smoother vibrato effects try
the Intensity control at around 6
and the Speed control at 1. For the
really wild sounds, crank the
Intensity up towards 8 (or beyond)
and go from there.

7. Reverb-Dimension controls
the amount of reverberation
applied to the signal. With the con­trol at the “0” position there is no
reverb applied; as the control is
turned towards “10” the amount of
reverb increases accordingly.

8. Power light indicates the ampli­fier is turned on by glowing an iri­descent blue color.

9. Power switch is used to turn
the amplifier on and off.

THE REAR

PANEL:

10. Power cord connects the
amplifier to a suitable source of
A.C. voltage. This is a grounded,
three-wire cord and must be con­nected to a properly grounded out­let. DO NOT attempt to defeat

the ground connection of the
power cord! If your amp was pur-

chased outside of the United
States, see the sticker next to the
A.C. connector for its power rat­ings. Follow the above guidelines.

11,12. Power Tubes: EL84 /
6BQ5 (2)

13. Power Amp Phase Splitter
Tube: 12AX7A / 7025 (1)

14. Preamp Tube: 12AX7A/ 7025

(1)
Replace tubes ONLY with same

types! Refer to enclosed publica­tion about Tubes and Tube
Amplifiers for additional informa­tion.

The Front Panel:

10 11 12 13

14

(Reverb cables:
do not disturb)

(Reverb cables:
do not disturb)

The Rear Panel: