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SWR 350x - page 1
350x OWNER’S MANUAL SWR • CORONA, CA • USA ...
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SWR 350x - page 2
IMPORTANT SAFETY INSTRUCTIONS CAUTION: TO REDUCE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER OR BACK. NO USER-SERVICE- ABLE P ARTS INSIDE. PLEASE REFER TO A QUALIFIED SERVICE TECHNICIAN. A. Read Instructions: All safety and operation instr uctions should be read befor e the product is operated. B. Retain Instructions: The safety and operating i ...
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SWR 350x - page 3
INTRODUCTION Congratulations on your pur chase of the SWR 350x Bass Amplifier! Y ou now own the cor nerstone amp of SW R’s world-r enowned Pr ofessional Line of products for bassists. A little histor y: The SWR 350x is an upgraded version of the Bass 350, a model we’ve of fer ed for over ten years as a simple and straightfor w a r d solution fo ...
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SWR 350x - page 4
Note: Please take a moment to verify that the following items wer e included in your SWR 350x packaging: AC Cable, User Guide, SubW ave Activator Footswitch, 1/4" to 1/4" Footswitch Cable, SWR Catalog. 350X • FRONT PANEL FEATURES • Dual independent input jacks compatible with both passive and active instr uments • P r eamp Gain cont ...
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SWR 350x - page 5
Sensitivity (full output under clipping, 8 ohms load, 100 Hz): Passive Input Jack: 38 millivolts Active Input Jack: 60 millivolts Power Amplifier (Ef fects Retur n Jack “in”): 5 volts Input Impedance Passive/Active Input: 800k Ohms Active Input: 60k Ohms Ef fects Retur n : 27k Ohms Output Impedance Ef fects Send: 100 Ohms T uner Send: 100 Ohms ...
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SWR 350x - page 6
Impor tant: The minimum total impedance when operating the 350x is 2 ohms. This means you can safely use: a) A single 8 ohm cabinet b) A single 4 ohm cabinet c ) T wo 8 ohm cabinets (total: 4 ohms) d) T hr ee 8 ohm cabinets (total: 2.6 ohms) e ) Two four ohm cabinets (total: 2 ohms) ** **Running the amplifier constantly at 2 ohms, while technically ...
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SWR 350x - page 7
amp clip circuit for this r eason. Active Input Jack The Active input jack should be used with instr uments having a built-in (on boar d) p r eamp or other sound sour ces that will pr oduce output levels gr eater than 1 volt RMS. The number of bass manufactur ers has in creased significantly over the years, and it’s impossible to tr y and keep tr ...
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SWR 350x - page 8
This r emains tr ue up to about the “2 o’clock” position. This position – a favorite for many users – brings out both the low end fundamentals and crisp highs and, at the same time, adds a little lower midrange to help cu t through the band. However, if you go fur ther clockwise and past the 2:00 position, selected mids will star t to dr ...
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SWR 350x - page 9
long as your speaker cabinet can handle the peak levels. Adjust the controls slowly , and use com- mon sense. Midrange Contr ols Y our 350x comes equipped with two dif fer ent contr ols for setting the amount of midrange present: one for boosting and cutting the level of midrange, and another for setting the specific midrange fr equency that will b ...
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SWR 350x - page 10
Activating or Defeating the Limiter Cir cuit Y ou may either activate or defeat the Limiter cir cuit via the Ef fects Blend contr ol, wh ich doubles as an on/of f switch for the Limiter . The “In” position activates the Limiter Cir cuit, and is the default setting as shipped from the factor y . T o defeat the Limiter , simply pull “out” on ...
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SWR 350x - page 11
350x OWNER’S MANUAL • 9 Balanced Output jack is the same as when in the DIRECT position, with one impor tant exception: the SubW ave™ is pr esent. What’s the benefit of this setting? W e’ve found that most people who use ef fects pedals pr efer to use them in fr ont of the amplifier . In other w o r ds, they r un their bass into the ef fe ...
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SWR 350x - page 12
XLR Gr ound/Lift Switch Sometimes connecting to cer tain mixing boar d s or studio consoles with non-standard XLR wiring can cause a gr ound loop. Y our 350x has a push-button switch for lifting the gr ound on the Balanced (XLR) Output. (It af fects no other outputs.) Pushing on the switch will change the mode of operation. When the switch is in th ...
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SWR 350x - page 13
Ef fects Send This jack’s primar y function is to send a post-EQ-and-SubW ave™ signal to an exter nal ef fects device for use in the 350x Ef fects Loop. However , it can also be used as: 1. A line level output for use in conjunction with an additional (slave) power amp—such as SWR’s Power 750. 2. An unbalanced output suitable for r ecor din ...
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SWR 350x - page 14
SPEAKER OUTPUT SECTION This section of the manual will deal with the pr oper connection of speaker cabinets to the power amplifier in the 350x. Some of this gr ound has alr eady been covered in the “Getting Star ted – Connecting Y ou r Speaker Cabinets” section in the beginning of the manual. This is meant to supplement that section and provi ...
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SWR 350x - page 15
One 8 ohm enclosure + one 8 ohm enclosur e = 4 ohms total impedance One 4 ohm enclosure + one 4 ohm enclosur e = 2 ohms total impedance One 8 ohm enclosure + one 4 ohm enclosur e = 2.6 ohms total impedance Her e’s another for mula: T o figu r e out the total impedance of two or mor e cabinets of equal value hooked up in parallel, divide the imped ...
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SWR 350x - page 16
Only SPEAKER CABLE of 18 gauge or heavier (the heavier the cable, the lower the gauge) should be used to connect your 350x to your speaker system. Do not use shielded instr ument cable to connect your ampli - fier to your speaker enclosur e, as this can r esult in inter mittent power loss, cause your amp to oscillate and damage itself and/or your s ...
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SWR 350x - page 17
Line Fuse (A/C or Mains Fuse) This fuse is pr ovided to pr otect the inter nal electr onics against power sur ges, etc. It also pr otects the unit against itself should one of the inter nal components fail. If this fuse should open, repl ace it with the same type of fuse and rating. Do not defeat the purpose of this featur e by using a higher rated ...
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SWR 350x - page 18
A FEW WORDS CONCERNING HEAT One of the most asked questions about our amplifiers is why they tend to get war mer than other amps. The chassis of your amplifier can get quite war m during nor mal usage. This is especially tr ue if you ar e operating your 350x at a 2 or 2.6 ohm total impedance. This is because these low impedances ar e intr o- ducing ...
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SWR 350x - page 19
Aura l Enhancer Frequency Lev el Treble Midrange 0 0 0 500 +15 -15 200 800 min max +15 -15 +15 -15 Aura l Enhancer Frequency Lev el Treble Midrange 0 0 0 500 +15 -15 200 800 min max +15 -15 +15 -15 Aura l Enhancer Frequency Lev el Treble Midrange 0 0 0 500 +15 -15 200 800 min max +15 -15 +15 -15 Aura l Enhancer Frequency Lev el Treble Midrange 0 0 ...
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SWR 350x - page 20
350x LIMITED WARRANTY The 350x fr om SWR is war ranted to the original consumer pur chaser for TWO YEARS fr om the date of pur chase against defects in materials and workmanship, pr ovided that it is purchased from an Authorized SWR dealer. This war ranty applies only to pr oducts pur chased in the USA or Canada. This war ranty is VOID if the unit ...
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