WT550 - Eden
Contents
1. World Tour Bass Guitar Amplifier Covering Model WT550 EDEN THE LEADER IN BASS AMPLIFICATION 08 10 2005 by U S Music Corp Bass Guitar Amplifier WT550 OPERATION MANUAL Publishing Date 08 10 2005 FORWARD Congratulations on the purchase of your new Eden World Tour Integrated Amplifier System All of us at Eden are totally committed to providing you with the very best bass guitar systems in their class Our goals are to offer you the outstanding performance quality of a top notch professional bass amplification system at a reasonable price point and to make World Tour amplifiers the most musical and reliable Bass amplifiers available This manual will cover domestic and international versions of the WT550 Integrated Amplifier The WT550 delivers 300 watts RMS output 8 Ohms 550 watts 4 Ohms and 750 watts 2 Ohms per channel with 3dB of headroom at all impedances This amplifier also features a thermostatically controlled active cooling system with built in thermal safeties You have purchased what we feel is one of the finest bass amplifiers in the world The tube pre amplifier section with its familiar Eden Enhance control and powerful 5 way semi parametric tone control system is coupled to a gentle auto compression circuit allowing you to achieve a wide array of sounds This compact rack mountable package houses modular circuits made with superior components and designed for years of trouble free serv2. Compensating for it may result in a stage sound that may seem a little thin However the sound is actually quite full out in front NOTE Remember you can t equalize out major physical room anomalies If things sound really weird where you are try moving you rig a few feet and see if that helps This may be particularly helpful on saggy stages that bounce like a drum head The propellerhead term for this is diaphragmatic So says David LB YOU RE DONE GO PLAY There you have it a quick and easy process to help you get the perfect tone from your Eden amplifier As previously mentioned it make take a few extra minutes the first few times you go through this especially if you take the time to experiment with all the knobs and switches which we highly recommend We are confident that the time you spend getting to know your new friend is an important investment one that will pay off immeasurably in Great Bass Tone And after all that s why you bought an Eden right OTHER CONSIDERATIONS Suggested Speaker Systems Your speaker system should be chosen to accommodate the characteristics of your amplifier and your predominant application If you will only be using one cabinet a 4 Ohm model will draw the most current from your amplifier If you will generally be using two cabinets they should both be 8 Ohm models so their combined impedance will be 4 ohms If you are uncertain about your future needs always go with
3. If you experience any discomfort or ringing in the ears or suspect hearing loss you should consult an audiologist Thank you for your purchase of an Eden bass guitar product This unit has been designed and constructed to give you years of trouble free service Please take the time to review this manual and to send in your warranty registration card 3 FRONT PANEL FEATURES Input Jack Designed to accept a standard inch mono phone plug For best results use a high quality shielded cable to connect your instrument to the amplifier The input is buffered and will handle standard passive high level active and piezo input signals Gain Control Regulates the first gain stage of the preamplifier and controls the amount of signal available to the system Input Pad Pull the Gain control out to engage a 12dB pad on the input stage This is especially useful for high gain instruments When engaged the indicator light to the left of the Input Gain control will be lit Set Level Indicator This light helps the user set the appropriate amount of gain When set properly the indicator should light on your loudest lowest notes We ll go over this in more detail later in the manual Enhance Control Called the Magic Knob by some this complex control simultaneously boosts the very low bass upper middle and high frequencies while putting a dip in the lower middle frequencies It is flat when set to its minimum leve
4. Hz 3 Amps 5 x 20 mm GMC T slow blow Japan 100 Volts 60 Hz 10 Amps 5 x 20 mm GMC T slow blow IMPORTANT NOTE Always use slow blow or time delay type fuses Do not use fast blow fuses To convert your amplifier from US to European fusing remove the Fuse Holder and insert a 5 Amp slow blow fuse Flip the fuse holder over and reinsert IMPORTANT NOTE In order to operate properly in other parts of the world your amplifier may require minor modifications These modifications must be made by a QUALIFIED technician Contact your local distributor for further information Amp Outputs These consist of two inch jacks and an NL 4 connector sometimes called a Speakon The jacks are wired in parallel The total speaker load impedance should not go below 2 ohms On NL 4 connectors we use 1 1 connections Mono Pre EQ Effects Send Return These standard inch jacks allow you to send and receive your signal to and from external devices This effects loop is positioned post behind the compressor and before the Enhance control and the tone section This loop is at line level do not use instrument level effects in this loop as they tend to be overloaded by the higher signal level which can cause distortion Recording Out D I This fully balanced XLR output allows you to send a pre or post EQ signal to a recording or sound reinforcement mixing console We use Pin 2 hot configuration Adjusting the Master Volume control will
5. a pre gain signal for connection to a tuner It can also be used to provide pre tone signal to other devices such as a direct box or console The signal is enough to provide adequate signal to virtually every tuner on the market Cooling System Your amplifier features a thermostatically controlled fan which will switch on when the internal temperature reaches 130 degrees F In low volume situations into 8 Ohm loads the fan may not come on at all The cooling system also features a high temperature thermal safety system which will activate an AGC Automatic Gain Control circuit if the operating temperature goes above 200 degrees F This circuit will automatically turn down the output of the system in the event of overheating It will automatically reset itself to full power as soon as the unit cools down to a safe operating temperature NOTE the D I will continue to operate normally even when the amplifier is in thermal safety mode Only the stage sound will be lost IMPORTANT NOTE Excessive heat is a Very Bad Thing and can result in severe damage to your amplifier DO NOT bypass or disconnect any part of your thermal safety system Doing so will immediately void your warranty OPERATING INSTRUCTIONS Mechanical and Thermal Issues During operation your amplifier should always be placed away from sources of moisture or heat Care should be taken not to obstruct the ventilation holes on the bottom and sides of the unit In the
6. event of thermal shutdown you should eliminate the cause of the thermal problem poor ventilation speaker loads lower than 2 ohms PER CHANNEL immediately The supplied rack ears can be used to install your amplifier in a conventional equipment rack for protection during transportation Electrical Connection The WT550 requires at least 10 Amps of correctly wired alternating current for proper operation Providing less than 10 Amps of power may result in poor amplifier performance so it s probably not a good idea to plug all of your band s gear into a single wall outlet Connections All instrument level input connections everything but the speakers should be made with high quality shielded cables The use of speaker cables for input connections will result in excess noise Speaker connections should be made with high quality 16 gauge or heavier unshielded speaker cables We recommend 10 or 12 gauge cables The use of shielded line or instrument cables for speaker connections can damage your amplifier The speaker cable should be as short as possible INITIAL SET UP As bassists each of us has in our head a concept of our perfect sound Eden amplifiers are designed to help you easily achieve the sound you hear inside you However it s a multi step process as explained below In order to ensure the ultimate in tone it s important to follow the procedure outlined below Don t skip steps don t jump around Yes this may t
7. ranges As we said earlier Clipping in the preamp section is a Very Bad Thing and is to be avoided at all times If you find yourself running out of amplifier headroom cut a little in the lower frequencies which require the most power from your amp You ll know this is happening if you see the Limit light flashing As long as the light is just blinking you re fine But if it s on more than it s off you might want to back off a bit Frequency Oddities Two areas are a frequent source of frustration for bassists trying to achieve their sound frequency masking and frequency enhancement Frequency masking occurs when other instruments particularly cymbals and electric guitars obscure the important upper harmonic content of your sound As a result you find that the EQ settings that were so perfect at home lack definition in a live setting On the other hand the stage settings that worked so well sound harsh and or thin in the absence of other instruments 12 Frequency enhancement results from cabinet placement and room acoustics A cabinet placed on the floor will have the lower frequencies boosted by about 3 db Placement against a wall adds another 3 db A corner adds 3 db more Consequently you may find a surprising boominess to your sound Certain qualities in the room itself can also enhance the lower frequencies further contributing to this problem Frequently this effect is more noticeable in the audience than it is on stage
8. style speaker cabinets and venue Extreme settings of boost or cut are unlikely to be necessary or helpful We are frequently asked to provide suggested settings for various styles of play We have discovered though that most of our endorsers tend to set their EQ generally flat using varying amounts of the Enhance Control to achieve their sound In fact a number of our recording artists tell us that their standard recording set up is to have the Enhance set at approximately 9 or 10 O clock and the tone controls set flat We encourage you to experiment with different settings to obtain the sound you desire We have included some EQ panel diagrams at the back of this manual to help you record your settings Enhance Once you ve set your gain you can move on to setting your EQ beginning with the Enhance control or Magic Knob as some call it The Enhance circuitry adds very low bass upper mids and highs while scooping out a bit of low middle The more Enhance effect you dial in the greater the boost and cut As with all of our EQ controls a little goes a long way 10 Slowly bring the Enhance control up while playing If you turn it up close to 12 00 on the dial and still don t have your sound stop there Return the Enhance to OFF or leave it at no more than 12 00 and work with the EQ section Using the EQ Controls Before you begin to twiddle knobs let s talk about a few things Excessive boosting of one or more EQ f
9. the 8 Ohm speaker option so that you can add another speaker later if you need to In general adding more speakers will give you a greater volume increase than adding a few more watts 13 We have designed our amplifiers to operate safely at 2 Ohms only because everyone else is doing it and some users expect it However we much prefer operating at 8 or 4 Ohms because of the markedly improved quality of tone and dynamic response But if you really want to you can operate your WT550 at 2 Ohms without worry Headphone Jack as a Line Driver On some occasions such as high volume or outdoor situations it may be desirable to use the WT550 along with an additional power amplifier and added cabinets A standard shielded instrument cable may be used to connect from the headphone jack of the unit to an unbalanced input of a standard power amplifier This will provide a signal that is post EQ and after the Master Volume control allowing the entire system to be controlled from the WT550 This way you only have to adjust one set of knobs This is a Really Neat Thing huh Using the WT550 Without Speakers This amplifier is designed to be used safely with headphones only without the loud speaker plugged in No harm will result from using the amplifier in this fashion This allows the use of the unit for practice with headphones and as a preamplifier with other amplifiers Neighbors and room mates really love this which qualifies it as another Real
10. However and this is very important if you ever release the Magic Smoke from your amplifier this is indeed a Very Bad Thing perhaps the worst thing you can do If you see any smoke Magic or otherwise coming out of your amplifier immediately turn it off and seek the services of a qualified magician uhm we mean technician DO NOT continue to use the amplifier in this condition Learn More If you d like to learn more about your amplifier or about our company and its activities we invite you to visit our website www eden electronics com There you ll find articles to help you better understand our products and the technical stuff some people find so interesting You ll also find our FAQ Frequently Asked Questions file which is updated regularly While you re there check out our on line forum There you can meet hundreds of other Edenites who ll be glad to help you with any questions you may have about our gear Not to brag too much but we think our forum is a Really Neat Thing filled with Really Neat People We re pretty sure you ll think so too 15 Service In the event of amplifier malfunction or questions about your unit s operating features that aren t answered in this manual or on our website you should contact your Dealer Once you and your dealer have determined it s definitely a malfunction and not an operator error you must call our Customer Service Department and obtain a Return Mercha
11. Output send to slave another amplifier Output Limit Indicator Lights to indicate activity of the power amplifier limiting circuit which protects the speaker system from severe distortion These LEDs indicate that the amplifiers have reached their maximum output level Mains On Off Switch This switch turns the system power ON or OFF The switch illuminates to indicate the presence of AC power present in the chassis This switch is prior to the fuse The light in the switch may flicker depending on local voltage conditions This is normal and nothing to be concerned about NOTE The Mains Switch will illuminate even if the fuse is blown REAR PANEL FEATURES Amplifier Power Rating RMS with 3dB headroom 300 Watts 8 Ohms 550 Watts 4 Ohms 750 Watts 2 Ohms Combination Power Cord Jack and Fuse Holder The removable power cord is attached here To access the fuse holder pull the holder out of the top of the power receptacle Your unit was shipped with a spare fuse inserted in the fuse carrier USE ONLY THE SAME SIZE AND TYPE FOR REPLACMENT Using a fuse with a different rating than specified is a VERY BAD THING and can cause damage to your amplifier All models come with a holder marked FUSE or 115 230 and are factory configured for 100 120 230 240 only and must be adapted by a service tech for any voltage change Fuse Requirements USA 120 Volts 60 HZ 8 Amps 5 x 20 mm GMC T slow blow Europe 240 Volts 50
12. ake a minute or two but the work is well worth it Once they ve done it a few times most users can do it time and again in about a minute IMPORTANT NOTE Before you plug in your unit for the first time please do the following things First turn the power switch to the OFF position Check the back of your unit for the correct voltage notation for your county of operation Once you ve ensured correct voltage set the Master Volume control to minimum fully counter clockwise Set the tone controls to the center position 12 00 or 0 Turn the Enhance control to the minimum position Set the Input Gain control to the minimum fully counter clockwise Set the Compressor to the OFF position pull the Enhance Control OUT This will set your amplifier up flat and with the Compressor disengaged Next plug in the power cord to the AC inlet on the back of the unit Use only a safe grounded receptacle for proper operation at the correct voltage for your country Double check to make certain your amplifier is set for the correct voltage in your country Turn On Once you ve completed the steps above you can plug in your bass and turn on the unit plug it in first ok and let s get started We recommend turning your system on with the Master Volume control set to its minimum position This will prevent any unexpected signal from being sent to your speakers Setting Your Level Remember begin with the Input Gain Enhance Compresso
13. ice The Eden World Tour products group is the result of our quest for ultimate bass tone and maximum reliability Your amplifier was designed engineered and manufactured equivalent to aircraft vibration standards and housed in a one piece aluminum case with steel top to ensure maximum reliability The modular design allows quick repair in the field should such a need arise The Eden line of World Tour amplifiers is the result of our research and development in combining high performance and compact size Just as a skilled craftsman needs good quality tools that won t let him down on the job so does a good musician We hope you enjoy the tool we ve created for you Have fun play low Please read this manual in its entirety before operating your new amplifier Failure to do so could result in misuse or damage We ve taken the time to write it which was a lot longer than the time it will take for you to read it Help us help you by taking a few moments to learn how to properly use your new amp You ll be glad you did CAUTION Your ears are your most important piece of equipment Unfortunately they cannot be replaced as easily as your other gear Please take the following warning seriously This product when used in combination with loudspeakers and or additional amplification may be capable of producing sound levels that could cause permanent hearing loss DO NOT operate at high volume levels or at a level that is uncomfortable
14. l fully counterclockwise Compressor Defeat To defeat the Auto Compression circuit pull the Enhance Control out Compressor Indicator Light Indicates compression is taking place This indicator is directly above the Set Level indicator Tone Control Section These controls allow you to boost or cut the tone at the desired frequency The spacing allows the controls to interact smoothly and musically From left to right the controls and switches are Bass This traditional shelving tone control provides 15 dB of boost or cut at approx 30Hz The control is flat in the 12 00 position Semi Parametric Controls There are three sets of semi parametric controls Each set has a Frequency control top knob and a Level control bottom knob The Level controls provide 15 dB of cut or boost The control is FLAT in the 12 00 position From left to right the Frequency controls have the following ranges 30 300Hz 200Hz 2KHz 1 2 12KHz Treble This traditional shelving tone control provides 15 dB of boost or cut at approx 11KHz The control is flat in the 12 00 position EQ Clip Light indicates clipping in the EQ section Clipping is a Very Bad Thing and should be avoided at all times We ll tell you how to avoid this later in the manual Master Level Control Adjusts overall system output and stage loudness Headphone Jack Accepts a standard inch stereo or mono headphone plug It can also be used as a Master
15. ly Neat Thing MAINTENANCE Your Eden amplifier has been designed to require minimal routine maintenance Attention to the following areas will ensure optimum performance of your amplifier We re serious Don t blow this off OK Contact Point Cleaning One of the weakest links in most bass amplification systems are the solderless connection points where instruments speaker cabinets effects and other devices are connected to the amplifier The most vulnerable of these types of connection is the jack on your instrument In addition to contamination from airborne pollutants these points are frequently assaulted by connectors that have picked up debris from dirty stages cases etc This contamination can result in poor contact as well as poor tone and we all know that bad tone is a Very Bad Thing These points should be cleaned regularly with a cotton swab soaked in denatured alcohol or a commercially available de oxidant Frequent cleaning of the plugs on your cords is also recommended 14 Dust Removal You should periodically inspect the ventilation openings on the top and sides of the unit to ensure that they have not become blocked by accumulated dust Vacuum the openings to remove any dust buildup Dust bunnies are definitely not cool The Magic Smoke Few people realize just how much magic goes into creating Great Bass Tone It isn t something you normally need worry about Just have fun and leave all that to us
16. ndise Authorization RMA We WILL NOT accept any gear sent without an RMA so save the time and money by calling first ok Please call the USM Customer Service Dept at 1 800 USSOUND 1 800 877 6863 When you hear the voice prompt Press 1 Please ship Authorized Returns for service to Eden Electronics P O Box 338 115 2nd Street Montrose Minnesota 55363 Email Website eden eden electronics com http www eden eletronics com Eden Electronics 847 949 0444 C O U S Music Corp 847 949 8444 fax 444 E Courtland Rd Mundelein IL 60060 Eden Never Compromise Note for those who care This manual was written by David Eden Nordschow Eden s Chief Propellerhead amp Master of All Things Technical and Lane Baldwin Eden s Special Projects Coordinator Many Other Functions Any grammar errors are David and Lane s fault as are the attempts at humor Please don t blame anyone else for any weirdness as we were warned several times Really 16 My Favorite Settings Setting 1 Setting 2 Setting 3 Setting 4
17. not affect this send This output is designed to use with phantom powered systems However it never hurts to turn off the phantom power at the board if possible D I Level Controls the level being sent from the XLR balanced output jack We suggest setting the control at approximately 12 o clock initially If the signal to the board is too hot it s better to engage the Input Pad on your channel of the board than to turn it down here if at all possible In general it s better in terms of signal to noise ratio and dynamic presentation to send as hot a signal as possible to the board However you can adjust the signal level if necessary so make sure your soundperson or recording engineer is aware of this capability Ground Lift Switch This switch lifts the ground within the balanced output system to allow you to eliminate excessive noise ground loops when connected to external systems Aux Inputs These standard 4 inch input jacks are designed to accept the signal from an external source such as a CD or cassette player drum machine synth module etc The signal is summed added in prior to the tone controls and Master Volume control These jacks can also be used to return a studio cue signal allowing the WT550 to provide you with your own headphone mix in the studio The Aux signal is summed with the main input and sent to all outputs including the DI Tuner Out Jack This standard inch jack is designed to provide
18. r and Master Volume completely OFF fully counter clockwise All EQ should be set flat that is at 12 00 straight up While playing your lowest note or loudest slowly turn the Input Gain up until the Set Level light begins to blink with regularity If you can t go past 8 or 9 o clock you may engage the Gain Switch to better match the gain of your instrument to the amplifier If you have disengaged the Compressor as we suggested the Set Level light will barely blink on your loudest notes when you reach clipping in the Input stage We recommend you decrease gain one or two clicks to ensure there is no clipping in the system By the way this is David s favorite way to set level even if you intend to use compression Once you have properly set your Input Gain turn the Master Volume up to a comfortable listening level and proceed with the rest of the setup process Setting the Compressor If you want to use compression engage it now by pushing the Enhance knob IN The compressor light will now blink when your gain goes above the compression threshold This will generally show up more on the lower notes or when you employ Slapping A properly compressed Slap sound is very cool indeed If you want more compression increase the Input Gain a little at a time until you achieve the amount of compression you desire SETTING YOUR EQ The frequencies that you ll need to boost or cut are dependent upon your instrument playing
19. requencies may cause an overload in the EQ section If this happens the EQ Clip light will engage This is a Very Bad Thing and needs to be corrected immediately If EQ clipping occurs you can either decrease the boost or decrease the Input Gain Remember too that our EQ controls are active and are meant to turn both ways not just UP This means that you can enhance a certain frequency spectrum either by boosting that frequency or by cutting the adjacent frequencies This latter method has the advantage of maximizing potential headroom If possible step well forward of your rig to get a better idea of how you will sound in the room You may be surprised at how different you sound once you step away from the speakers NOTE Many players rely on the Enhance Control and perhaps a little Midrange Massage to get their sound This method leaves the Bass and Treble controls available to dial in to a particularly difficult room Just something to keep in mind ok Setting Bass and Treble OK now it s time to set the EQ beginning with the Bass and Treble controls These controls cover a fairly broad frequency spectrum and a little goes a long way Adjust these controls up or down as needed We suggest playing a few notes in various areas of the neck so you can hear what your adjustments have done across the fretboard Using the Semi Parametric EQ Controls Adjusting the Semi Parametric controls allows you to focus in on particular f
20. requencies to achieve your desired tone We suggest you spend some time experimenting with these controls to learn more about how they can affect your sound Here s an easy way to do that Beginning with all controls FLAT turn the first left frequency control fully counterclockwise Turn the corresponding Level control to approximately 9 00 Now while playing rotate the frequency control to the right a little at a time You should be able to easily hear the frequencies this first set of controls affects 11 Now cut the Level control to approximately 3 00 and do the same thing Repeat this process with the two remaining control sets By the way this process is a lot easier if you have a friend do the knob twiddling while you play Here are a couple of tips to help you dial in your desired tone For a great fretless tone dial in a little extra at approximately 550Hz For extra grind for Rock and other aggressive music add a little at 1 1 2KHz or 2 2 2KHz or both Remember though that a little goes a long way Don t over boost NOTE Remember that the tone you get when playing alone may not cut through as well as you d like when playing with others You may need to adjust the tone controls to achieve the same apparent tone especially in the mids and high end A FEW TECHNICAL THINGS TO REMEMBER Clipping Bad Keep an eye on the EQ Clip light If it blinks either reduce Input Gain or cut back on one or more EQ
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