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Re: how do i connect eurolive vs1220f?
I'm sorry if this isn't going to be as helpful as we would both prefer but it will explain your problem if nothing else. I have managed to find a manual for this kit here:- http://www.behringer.com/assets/VS1520_VS1220F_VS1220_M_EN.pdf
and unfortunately it says:
"Using 1/4" TS speaker cables, lug the power amp output into the 1/4" input on the back of the speaker. DO NOT use the instrument cables(i.e., guitar cords) for this connection!"
This has made things clear to me anyway. This is just a speaker and has no other circuitry, because of this you must have an amplifier of some sort between your guitar and this speaker in order to hear anything. As long as the speaker is plugged into the mains supply, and a suitable amplifier there is no need for an on/off switch, everything is controlled from the amplifier.
Hope this is helpful, if so would you please register that with Fixya
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Do the cables have the right length plug/jack ends? There are 5 different lengths in use. Some will short the inputs completely.
Do you get noise floor from the amp when turned full volume? if so, it is an input/mute issue. The switches these days are rather cheaply made and prone to dirt or corrosion. Try cycling the switches repeatedly. The same with the jacks.
If there is no warranty left- pull the chassis out and under a regular flourescent light, noise test each part of the amp with an insulated screwdriver- just make a contact on discrete transistors, or on the inputs of the IC's and work back towards the input. If it is clean all the way back-it has to be the cable, cable ends or the guitar.
You actually have the "B" version as the original 25R doesn't have RCA jacks. Anyway, on with your problem...
I want you to do a test: With a set of headphones plug them into the preamp output and then play your guitar... don't expect much loudness, it may be very faint and will ONLY be in one of the sides of the headphones. This tests the preamp section... have the guitar volume wide open.
IF you can hear the guitar that way, then the switch contact on the PA INPUT jack (not the preamp output) is not making contact. These jacks are really poor and the problem is not that uncommon. Fix is to open the unit and increase the spring tension on the contact or replace the jack. Never use the jack as they worsen evertime you plug something into it.
Note that the failing switch symptom MAY be broken soldering in the vicinity of the jack so look for that also. And also check the soldering of the guitar input jack as that is a common problem. Always loop your guitar cable through the handle so tripping over the cable doesn't break the jack by yanking the plug sideways... another common problem.
Typical guitar input on a schematic for line 6 shows an inductor between the input jack sleeve connection and the "earth" or safety ground.
I do NOT understand how you could fry one of the voltage regulators via the guitar cable unless you have more than a guitar (other devices) connected to the jack.
ALWAYS power any interconnected audio equipment from the same receptacle or power source to avoid ground bounce/fault damage to equipment.
If one choses to use an external amplifier one takes the pre out and connects that to the in of the external amp.
If one uses an external mixer and wants to use the amp and speakers in the cabinet, the output of the mixer is connected to the Power Amp input.
HINT: DO NOT use these jacks... the jacks have switch contacts that pass the preamp to the power amp and if you use the jacks, sometimes these contacts fail and then you have to open the amp and restore the contacts to get it to work.
The jacks are really weak and EASILY damaged as are the guitar inout jacks if the cables are yanked sideways.
ALWAYS loop your cables through the handle so if they are yanked they don't damage the jacks.
Have you tried another cable between amp and guitar? Usually the cable goes bad first. Have you tried another amp or possibly tried another guitar on your rig? If this still indicates that your guitar's Standard 1/4" TS Jack is noisy, remove the oval cover over the jack and check the solder joints for the wiring. Follow the wires back to the tone and volume pots and check those solder joints. If everything is secure...Plug in, power up and check for noise while turning the volume pots stop to stop. If the pots make a scratching noise, shut down rig and unplug the guitar. Get a can of spray contact cleaner with a small extension tube (available at electronic shops) to spray in the pots while turning them. (May have to remove pots fom the guitar to get at small openings on side of pot can.) Spray jack and test for noise. Jack STILL
noisy...If you can solder...unwire old jack, remove from guitar, take to electronic shop, match to Standard 1/4" TS Jack, install in guitar, resolder wire connections and test. If you cannot solder...take guitar to
a reputable shop or dealer that does this repair. Good Luck! P.S. The
spray contact cleaner can be used on the amp jack, pots and switches
too...just make sure the amp is unplugged from the power supply before
doing any spraying.
Rememberthe switch for the battery is ACTUALLY the sleeve of your guitar cable. If the jack fails, the battery will not be connected. Unfortunately, these jacks take a lot of abuse. The jack is really a stereo jack and the connection of the "ring" of the Tip-Ring_Sleeve (TRS) female jack to the "sleeve" connection is what grounds the battery for operation.
Mistakenly using a stereo audio cable will also cause this problem.
Use a good quality instrument cable, preferably gold plated plugs. Bad cables cause a LOT of these problems!
Here is the manual if you don't have one:http://www.tascam.com/details;9,21,23,19.html Make sure your guitar cord is working. Make sure your are plugged into the Guitar/Mike input jack.Do not connect a guitar amp to this jack via line out on the amp or otherwise. Set the Guitar/Mike switch to Guitar. Use the Input control to adjust the level of the input.Adjust your Headphone level using the Output control.Carefully read pages 12, 13, 14 and 15 of the manual.There are various combinations of controls that would make your guitar too quiet to be heard. Example: Mix Balance page 24. Let me know if this helps.
the buzzing is indicative of an open ground connection, check the cord by substitution or with an ohm meter, if the cord is good look at the connections to the jack inside the amp ( im guessing you built the amp from a kit). Is this a solid state amplifier? Tube amps have lethal votages and should not be experimented on without knowledge of electronic safety. Also if there is more than one input to the amp try plugging the guitar into another one and see if its still the same.