WT-1550 Users Manual High Power Bass Guitar Amplifier with All-Tube Preamplifier ©007-14-2005 by U.S. Music Corp.
High Power Bass Guitar Amplifier WT-1550 Power Amplifier OPERATION MANUAL Publishing Date 07-14-2005 FOREWORD Congratulations on the purchase of your new Eden World Tour 1550 Power Amplifier. All of us at Eden are totally committed to providing you with the very best bass guitar systems in their class.
Your amplifier was designed, engineered and manufactured equivalent to aircraft vibration standards and housed in a one-piece steel 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.
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.
GENERAL SPECIFICATIONS Size Weight EIA rack Power Output Bridge Mode Headroom Damping Factor Freq. Response Distortion THD 3.5” x 19” x 14.5” 32 Lbs. 2 Space w/ min. clearance @ 8_: 2 x 300 Watts RMS; @ 4_: 2 x 600 Watts RMS; @ 2_: 2 x 750 Watts RMS (Both channels driven) @ 8_: 1200 Watts RMS; @ 4_: 1550 Watts RMS +3dB min. better than 100 from 20Hz to 1Khz 10Hz to 20KHz +/- 2dB < .
Tone Controls – The Bass and Treble controls allow the player to quickly adjust the audio spectrum. The Bass is centered on 46Hz; the treble is centered on 3.5KHz. These controls are very useful in rooms with unusual or bad acoustic characteristics. For example in a room that is very dead or over damped, raising the treble level will allow the Bass to cut though better. If the room has too much bass the same solution will be helpful.
Fuse Holder –To access the fuse, unscrew the fuse holder cap, which is located near the power cord. The fuse is selected for the country of operation (see list at front of manual). 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) and are factory configured internally for 100/120/ 230/240 only and must be adapted by a service tech for any voltage change.
Thermal Protection System – The WT1550 has a fully automatic thermal safety system that will automatically reduce the output power available as needed to maintain best possible operations under sever operating conditions. Both channels operate independent of each other. 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.
Connections – Line connections (everything but the speakers) should be made with high quality shielded cables. The use of speaker cables for line connections will result in excess noise. Speaker connections should be made with high quality 16 gauge or larger 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.
Once you’ve ensured that all connections are correct, turn the unit ON. Turn the Input Gain up to a level that matches your preamplifier. If necessary, use the tone controls to quickly equalize your system to any room anomalies. A FEW TECHNICAL THINGS TO REMEMBER Clipping = Bad – Keep an eye on the Limit light. If it blinks, even regularly, that’s OK. However, if it’s on all the time, you should reduce Input Gain. As we said earlier, Excessive Clipping is a Very Bad Thing and is to be avoided at all times.
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 set up your Eden amplifier. It may take an extra minute or two to ensure everything is connected correctly.
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. In addition to contamination from airborne pollutants, these points are frequently assaulted by connectors that have picked up debris from dirty stages, cases, etc.
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. 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.
