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VX3500
MODEL 3500 350 WATTS Hartke Systems
GRAPHIC EQUALIZER Transient Attack
INPUT PRE AMP CONTOUR MASTER
30Hz 64Hz 125Hz 250Hz 500Hz 1KHz 2KHz 3KHz 5KHz 8KHz
AB CROSSOVER
+15 +12 +15
PASSIVE 4 5 6 4 5 6 4 5 6 IN +9 3 0 3 3 0 3 4 5 6 500Hz
3 7 3 7 3 7 +6 +3 5 5 5 5 3 7 o
+2
2 8 2 8 2 8 0 -2 0 10 10 10 10 2 8 250Hz 1KHz
1 9 1 9 1 9 -3 15 15 15 15 1 9
0 10 0 10 0 10 OUT -6 -18 +18 -18 +18 0 10 80Hz LOW HIGH
ACTIVE -12 -9
-15 -15
TUBE SOLID STATE COMPRESSION LOW PASS HIGH PASS VOLUME FREQUENCY
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Introduction 2 Features 3 Guided Tour Front Panel 4-5 Rear Panel 6-7 Setting Up and Using the VX3500 8-9 About Equalization 10-11 About Compression 12 Appendix A: Caster Installation 13 Appendix B: Block Diagram 14 Appendix C: Changing the VX3500 Voltage 15 Specifications 16
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Introduction Congratulations on purchasing the Hartke VX3500 Bass Amplifier! Although this unit is designed for easy operation, we suggest you first take some time to go through these pages so you can fully understand how we’ve implemented a number of unique features. The VX3500 provides 350 watts of power to the built-in 2-way bass speaker sys- tem. With that kind of power and Hartke’s custom designed transducers, includ- ing 4 x 10-inch low frequency, working with a 1-inch high frequency comp
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Features The Hartke VX3500 bass amplifier offers all the newest concepts in bass ampli- fication. Here are some of its main features: •Power to spare — The VX3500, a full 350 watts delivered to its internal 4 ohm speaker system. • Internal, 2-way bass speaker system including four custom design 10-inch low frequency drivers, plus 1-inch high frequency compression driver. • Our unique Transient Attack® circuitry which ensures that every nuance of your bass performance is reproduced faithfully. •T
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Guided Tour - VX3500 Front Panel 3 45 6 1 2 78 MODEL 3500 350 WATTS Hartke Systems GRAPHIC EQUALIZER Transient Attack INPUT PRE AMP CONTOUR MASTER 30Hz 64Hz 125Hz 250Hz 500Hz 1KHz 2KHz 3KHz 5KHz 8KHz A B +15 +15 +12 5 5 5 0 0 5 PASSIVE 4 6 4 6 4 6 +9 3 3 3 3 4 6 IN +6 +3 5 5 5 5 3 7 o 3 7 3 7 3 7 +2 2 8 2 8 2 8 0 0 10 10 10 10 2 8 -2 1 1 1 15 15 1 9 9 9 9 -3 15 15 0 0 0 -6 -18 -18 0 10 10 ∞ OUT -9 +18 +18 10 -12 ACTIVE -15 -15 LOW PASS HIGH PASS VOLUME POWER TUBE SOLID STATE COMPRESSION 30Hz
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Guided Tour - VX3500 Front Panel 6. Compression control - This determines the amount of compression (peak signal reduction) by simultaneously adjusting both threshold and compression ratio (which ranges from 2:1 to infinity [limiting]). At the fully counterclockwise “Off” position, the circuitry is bypassed and no compression is applied (the knob clicks when set to the “Off” position). As the knob is raised clockwise (at set- tings from “1” to “∞”) increasing amounts of compression are applied.
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Guided Tour - VX3500 Rear Panel 1 3 4 5 8 9 EFFECT DIRECT OUT Hartke Systems POST NORMAL SPEAKER SEND Distributed Exclusively by OUTPUT PRE GND LIFT Samson Technologies Corp. Hicksville, New York 11802 MINIMUM MODEL 3500 ~ AC INPUT IMPEDANCE 115V/230V 50/60Hz 350 WATTS FUSE 4 OHMS 8 = 240 WATTS 8A/250V, 300W (115V) 4 = 350 WATTS RETURN BALANCE 4A/250V, 740W (230V) CAUTION 0 TO PREVENT SHOCK, DO NOT OPEN. NO USER SERVICEABLE PARTS INSIDE. REFER SERVIC- ING TO QUALIFIED SERVICE PERSONNEL.
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Guided Tour - VX 3500 Rear Panel 5. Effect Send jack - Use this 1/4” unbalanced jack to send low impedance (600 ohm) signal from the Model 3500 to a professional outboard effects proces- sor such as a reverb, echo, chorus, flanger, or harmonizer device.* Output level is approximately 0 dB to +4 dB and is post-EQ and post-compression but unaffected by the setting of the Master Volume control. You can also use the Effect Send jack to route signal to an external mixing console or amplifier with a
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Setting Up and Using the VX3500 Setting up your Hartke Systems 2000/3500 Bass Amplifier is a simple proce- dure which takes only a few minutes: 1. Remove all packing materials (save them in case of need for future service) and decide where the amplifier is to be physically placed. To avoid potential overheating problems, be sure that the rear panel is unobstructed and that there is good ventilation around the entire unit, particularly behind the rear-panel fan. 2. Locate the included casters, wh
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Setting Up and Using The VX3500 7. Experiment with altering the balance of the two Pre-Amp knobs, listening to the effect each has on the overall sound. Depending upon the specific instru- ment you are using and your personal taste, you may prefer the sound of one over the other, or you may prefer a particular blend of the two. Note that, when both are used at equal settings, the amplifier will be twice as loud as when only PRE AMP one is used. In step #4 on the previous page, we recommended tha
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About Equalization The Hartke Systems Model 3500 Bass Amplifier gives you enormous control over shaping the sound of your bass, using a process called equalization. To understand how this works, it’s important to know that every naturally occurring sound consists of a broad range of pitches, or frequencies, combined together in a unique way. This blend is what gives every sound its distinctive tonal color. EQ controls allow you to alter a sound by boosting or attenuating specific fre- quency are
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About Equalization To find out how each graphic equalizer slider affects the sound of your particu- lar bass, start with all ten bands flat (that is, all ten sliders at their detented “0” center position). Then, one by one, raise and lower each slider, listening care- fully to the effect of each. If you don’t specifically need to utilize the ten-band graphic equalizer, bypass it by setting the In/Out switch to its “Out” position. Alternatively, you can preset a custom graphic equalization curve
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About Compression The dynamic range of a sound is the difference between its loudest and softest points. For example, as you play your bass, you’ll probably find that some notes (for example, notes played on the upper frets of the lowest string) are consider- ably louder than others. The function of the Compression circuitry in the Model 3500 Bass Amplifier is to reduce overall dynamic range by automatically reduc- ing the level of the loudest sounds you play so that they are closer in level to
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Appendix A: CASTER INSTALLATION • Locate one caster and four each of the supplied screws and lock washers. • Hold the caster in place and hand start the screws. Be careful to ensure that the screws are on the proper thread chase. DO NOT PUSH TEE NUT INTO ENCLOSURE. • Use a screw driver to tighten the four screws. Be careful not to over tighten the screws. • Repeat the steps above for the remaining three cast- ers. 13
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Appendix B: Block Diagram SEND 50 mV, IN COMPRESSOR 0 dB TO +4dB IN/OUT SWITCH FIXED EQ RETURN VR TUBE RMS DETECTOR COMPRESS 2 BAND VR SOLID VCA CONTOUR STATE PRE MIXER 10 BAND EQ 2 1 POST 3 50 mV, IN -20 dB TO -30 dB GND. LIFT/ NORMAL 10 BAND OUT 10 BAND IN MASTER SECTION AMP PROTECTION Model 3500 14
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Appendix C: Changing the VX3500 Voltage Following are step-by-step instructions for changing the mains voltage of the Model 2000/3500. WARNING: Before carrying out this operation, remove the power cord! 1: Insert a small screwdriv- 2: Remove fuse sled. er into the slot beneath the fuse sled and gently press in and up. The fuse sled will pop out approximately 3/8" inch. 3: Use a small pair of needlenose pliers to gently pull out the mains jumper. 4: Use the needlenose pliers to reverse the ma
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Specifications Input Sensitivity Passive Input 100 k Ohms 20 mv. Active Input 100 k Ohms 60 mv. Rated Output Power 350 watts @ 4 ohms Total Harmonic Distortion less than .5% Signal To Noise Ratio approx. 78 dBm Equalizer Contour Low Pass ±18 dB @ 100 Hz Contour High Pass ±18 dB @ 10 kHz Ten-Band Graphic ±15 dB, center detented @ 30 Hz, 64 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 3 kHz, 5 kHz, 8 kHz Compression Ratio 2:1 to infinity Send Output Level 0 dBM Return Input Level 0 dBM Speaker S
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Distributed Worldwide Exclusively by: Samson Technologies Corp. 575 Underhill Blvd. P.O. Box 9031 Syosset, NY 11791-9031 Phone: 516-364-2244 Fax: 516-364-3888 www.samsontech.com
