Ampeg_SVP-CL_Preamp_Users_Guide电路图.pdf

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1、Users Guide for the Users Guide for the Ampeg is Proudly Made in AmericaAmpeg is Proudly Made in America Bass PreampBass Preamp RadioFans.CN 收音机爱 好者资料库 SVPCL Bass Preamp 2 Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Features . . . . . . . . .

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 The Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 The Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Some Suggested Settings . . . . . . . . . . . . . . . . . . . . . . . .6 Changing the

3、 Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . .7 Technical Specifications . . . . . . . . . . . . . . . . . .back cover IMPORTANT SAFETY INSTRUCTIONS READ, FOLLOW, HEED, AND KEEP ALL INSTRUCTIONS AND WARNINGS. D

4、O NOT OPERATE NEAR ANY HEAT SOURCE AND DO NOT BLOCK ANY VENTILATION OPENINGS ON THIS APPARATUS. FOR PROPER OPERATION, THIS UNIT REQUIRES 3” (75CM) OF WELL VENTILATED SPACE AROUND HEATSINKS AND OTHER AIR FLOW PROVISIONS IN THE CABINET. DO NOT USE THIS APPARATUS NEAR SPLASHING, FALLING, SPRAYING, OR S

5、TANDING LIQUIDS. CLEAN ONLY WITH LINT-FREE DAMP CLOTH AND DO NOT USE CLEANING AGENTS. ONLY CONNECT POWER CORD TO A POLARIZED, SAFETY GROUNDED OUTLET WIRED TO CURRENT ELECTRICAL CODES AND COMPATIBLE WITH VOLTAGE, POWER, AND FREQUENCY REQUIREMENTS STATED ON THE REAR PANEL OF THE APPARATUS. PROTECT THE

6、 POWER CORD FROM DAMAGE DUE TO BEING WALKED ON, PINCHED, OR STRAINED. UNPLUG THE APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME. ONLY USE ATTACHMENTS, ACCESSORIES, STANDS, OR BRACKETS SPECIFIED BY THE MANUFACTURER FOR SAFE OPERATION AND TO AVOID INJURY. WARNING: TO REDUCE

7、THE RISK OF ELECTRIC SHOCK OR FIRE, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. SERVICE MUST BE PERFORMED BY QUALIFIED PERSONNEL. OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS. CONTINUED EXPOSURE TO HIGH SOUND PRESSURE LEVELS CAN CAUSE PERMA- NENT HEARING IMPAIRMENT OR LOSS. US

8、ER CAUTION IS ADVISED AND EAR PROTECTION IS RECOMMENDED IF UNIT IS OPERATED AT HIGH VOLUME. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE. TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. N

9、O USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. PRECAUCION RIESGO DE CORRIENTAZO NO ABRA PRECAUCION: PARA REDUCIR EL RIESGO DE INCENDIOS O DESCARGAS ELECTRICAS, NO PER- MITA QUE ESTE APARATO QUEDE EXPUESTO A LA LLUVIA O LA HUMEDAD. PARA DISMINUOIR EL RIESGO DE CORRIE

10、NTAZO. NO ABRA LA CUBIERTA. NO HAY PIEZAS ADENTRO QUE EL USARIO PUEDO REPARAR DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS. ATTENTION RISQUE DELECTROCUTION NE PAS OUVRIR ATTENTION: PROTGEZ CET APPAREIL DE LA PLUIE ET DE LHUMIDIT AFIN DVITER TOUT RISQUE DINCENDIE OU DLECTROCUTION. POUR REDUIRE

11、 DELECTROCUTION NE PAS ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE NEST REPRABLE PAR LUTILISATEUR. POUR TOUTE REPARATION, SADRESSER A UN TECHNICIEN QUALIFIE. IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL “ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES.” REFERREZ-V

12、OUS AU MANUAL DUTILISATION EXPLANATION OF GRAPHICAL SYMBOLS: EXPLICACION DE SIMBOLOS GRAFICOS: EXPLICATION DES SYMBLES GRAPHIQUES: DANGEROUS VOLTAGE “VOLTAJE PELIGROSO” DANGER HAUTE TENSION = RadioFans.CN 收音机爱 好者资料库 SVPCL Bass Preamp 3 An Introduction to your new Ampeg SVPCL Bass Preamplifier: The h

13、armonically rich sound and legendary performance of the classic AMPEG SVT are redefined in the SVPCL. This dynamic preamp delivers a thunderous unsurpassed quality, reliability and tonal flexibility, offering the classic vibrance of tubes as well as contemporary features. The SVPCL has the best of b

14、oth worlds. It is true to the design of an early-70s SVT with the addition of modern tone-shaping and output selection. All of the features and controls of your SVPCL Preamp are covered in detail within the pages of this users guide. We recommend going over them before you use the preamp. Features:

15、In the world of high performance bass amps, Ampegs SVT amplifiers stand alone. Keeping with true Ampeg tradi- tion, the SVPCL Bass Preamp offers you more performance and flexibility than any other preamp in its class. Listed below are some of the outstanding features of your new preamp: features whi

16、ch set it apart from the competition! Additional information on these features can be found on the pages indicated. PAD SWITCH: A switchable input pad, this feature is perfect for basses with active electronics or very “hot” pickups (page 4) MUTE SWITCH, TUNER OUTPUT JACK: Lets you cut the sound fro

17、m the amp, letting you tune your bass in private (page 4,5) 5-POSITION ULTRA LOW SWITCH: Five different settings for the Ultra Low provide the ultimate in bot- tom end response (page 4) ULTRA HIGH AND BRIGHT SWITCHES: Lets you tailor your high frequency response in many different ways “with the touc

18、h of a button” (page 4) 5-POSITION MIDRANGE SELECTOR: Take your pick from the five center frequency points available to get just the right midrange voice (page 4) TRANSFORMER BALANCED LINE OUTPUT: Lets you send a high quality line level signal to the house mixing board, a recording console, or anoth

19、er amplifier - switchable for pre or post EQ with switchable ground lift (page 5) RadioFans.CN 收音机爱 好者资料库 4 SVPCL Bass Preamp 1237845691011121314 1. INPUT: Connect your instrument here by means of a shielded instru- ment cable. 2. PAD: This switch, when depressed, attenuates the input signal by 10dB

20、. Attenuation allows the Gain control (#4) to be used at a higher setting. If clipping is indicated with the Gain con- trol close to fully counter clockwise, attenuation is needed. 3. MUTE: This switch, when depressed, mutes the signal at all out- puts except the Tuner Output (#21). 4. GAIN: Use thi

21、s control to adjust the level of the signal going into the pre- amp. For the best signal to noise ratio, set this control so the Peak LED (#5) flashes occasionally during loud pas- sages. 5. PEAK: This LED flashes when the signal level into the preamp approach- es clipping. When the Mute switch (#3)

22、 is depressed, this LED remains illumi- nated as a visual indicator that the Mute function is active. 6. ULTRA LOW: Use this five-position rotary switch to select a setting for the ultra low control, as follows: 1:Off flat frequency response 2:Sub Cut reduces frequencies below the bass range to prot

23、ect the speakers 3:Low Cut Classic provides a low cut equal to the original SVT 4:Ultra Low Classic contours the sound to emphasize the low end just like the original SVT 5:Ultra Low Modern provides a substantial low end boost 7. ULTRA HIGH: This switch, when depressed, adds about a 16dB boost to th

24、e high frequencies around 8kHz, depending on the setting of the Gain control (#4). 8. BRIGHT: This switch, when de- pressed, adds a 6dB boost to the high frequencies at 3kHz. 9. BASS: Use this control to adjust the low frequency output level. This control provides +17/-13dB at 20Hz. 10. MID: Use thi

25、s control to adjust the midrange frequency output level. This control provides +/-20dB at the fre- quency selected by the Mid freq con- trol (#11). 11. MID FREQ: Use this control to select the center frequency for the Mid control (#10), as follows: 1: 220Hz 2: 450Hz 3: 800Hz 4: 1.6kHz 5: 3kHz 12. TR

26、EBLE: Use this control to adjust the high frequency output level. This control provides +18/-20dB at 7kHz. 13. MASTER: Use this control to adjust the overall output level of the preamp. 14. POWER: Use this switch to turn the preamp on (top of the switch depressed) and off (bottom of the switch depre

27、ssed). The adjacent Ampeg logo illuminates green when the preamp is on and the tubes are warmed up. The Front Panel: 5 SVPCL Bass Preamp 17161518 192021 15. AC LINE IN: Firmly insert the female end of the supplied AC power cord into this socket. The grounded power cord should only be plugged into a

28、grounded power outlet that meets all applicable electrical codes and is compatible with the voltage, power, and freqency requirements stated on the rear panel. 16. FOOTSWITCH: Use this jack to connect the mono plug of a single but- ton footswitch for remote control of the Mute function. 17. PREAMP O

29、UTPUT: Use these jacks to send the output signal to the input jacks of your power amplifier. 18. PRE/POST: Use this switch to select either a Pre or Post EQ signal at the Line Output jack (#20). When this switch is depressed, the signal is Post EQ and is affected by the settings of the front panel t

30、one controls. With this switch in the out position the signal is Pre EQ, taken directly after the first tube stage. 19. GND LIFT/GND: When this switch is in the out position, the chassis ground at the Line Output jack (#20) is electronically disconnected. This helps reduce hum in the Line Output sig

31、nal. 20. TRANSFORMER BALANCED LINE OUTPUT: Use this jack to send a line level signal from the preamp to a house mixing board, recording con- sole, or external amplifier. 21. TUNER OUTPUT: Use this jack to send a signal to an electronic tuner. When the Mute function is engaged (#3, #16), the signal a

32、t this jack is unaf- fected and remains present, allowing for silent tuning during a performance. The Rear Panel: SVPCL Bass Preamp 6 Some Suggested Settings: FUNK: JAZZ: ROCK: COUNTRY: The setting of the Gain control depends on your particular instrument. The Master should be set to produce the app

33、ropriate output volume level. SVPCL Bass Preamp 7 Changing the Tubes: Tube wear is in direct proportion to how often and how hard you play. Preamp tubes arent worked as hard as power tubes and typically last longer. When a preamp tube wears out, the preamp may squeal, get noisy, lose gain and sensit

34、iv- ity, or just quit working. Aservice center can determine which tube(s) may need replacing. To get to the tubes in the SVPCL, the top must be removed. This should be left to a qualified service person. System Block Diagram: INPUT PAD GAIN MUTE MUTE TRANSFORMER BALANCED LINE OUTPUT PEAK MID MID FR

35、EQ. MASTER POST PRE BUFFER PREAMP OUTPUT PREAMP OUTPUT GND LIFT TUNER OUTPUT ULTRA HIGHULTRA LOW BASS TREBLE Ampeg reserves the right to change specifications without notice. Ampeg is proudly Made in America. 2004 SLM Electronics, 1400 Ferguson Avenue, St. Louis, MO 63133 U.S.A. P/N 47-836-01 012704

36、 SVPCL Bass Preamp Technical Specifications TONE CONTROL RANGE ULTRA LOW:1 = off; 2 = -3dB 30Hz; 3 = -3dB 200Hz; 4 = -20dB 600Hz; 5 = +9dB 30Hz ULTRA HIGH:+16dB 8kHz BRIGHT:+6dB 3kHz BASS:+17dB / -13dB 20Hz MID FREQ:+/-20dB 220Hz, 450Hz, 800Hz, 1.6kHz, or 3kHz TREBLE:+15dB / -20dB 7kHz GAIN23dB SIGN

37、AL TO NOISE RATIO80dB typical TUBE COMPLEMENT(2) 12AX7, (2) 12AU7 POWER REQUIREMENTS120VAC, 60Hz, 25VA 100/120VAC, 50/60Hz, 25VA 220-240VAC, 50/60Hz, 25VA SIZE (W x H x D) AND WEIGHT19” W x 1.75” H x 9.25” D, 9 lbs. Declaration Of Conformity #36, Effective 01-01-2001 Manufacturers Name:SLM Electroni

38、cs Production Facility:1901 Congressional Drive, St. Louis, MO 63146, USA Production Facility:700 Hwy 202 W, Yellville, AR 72687, USA Shipping Facility:1400 Ferguson Ave., St. Louis, MO 63133, USA Office Facility:1400 Ferguson Ave., St. Louis, MO 63133, USA Product Type:Audio Amplifier Complies with

39、 the following Standards: Safety:EN60065, E60065, C22.2, UL6500 and/or UL813 EMC:Directive 89/336/EEC, EN55103, EN55013, EN61000, and/or FCC 47CFR 15B clA Supplementary information provided by: SLM Electronics - R & D Engineering 1901 Congressional Drive, St Louis, MO 63146, USA Tel.: 314-569-0141, Fax: 314-569-0175