Connecting A Head To A Cab, speaker cable vs instrument cable |
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Connecting A Head To A Cab, speaker cable vs instrument cable |
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Jul 19 2008, 06:38 PM |
I totally agree - don't do it!
Worst case, the cable will fuse and break, then you will have no speaker connected to your amp and it in turn will then blow an output transformer or maybe redplate your tubes - either way ... D O N ' T D O I T ! -------------------- Check out my Instructor profile
Live long and prosper ... My Stuff: Electric Guitars : Ibanez Jem7v, Line6 Variax 700, Fender Plus Strat with 57/62 Pickups, Line6 Variax 705 Bass Acoustic Guitars : Taylor 816ce, Martin D-15, Line6 Variax Acoustic 300 Nylon Effects : Line6 Helix, Keeley Modded Boss DS1, Keeley Modded Boss BD2, Keeley 4 knob compressor, Keeley OxBlood Amps : Epiphone Valve Jnr & Head, Cockburn A.C.1, Cockburn A.C.2, Blackstar Club 50 Head & 4x12 Cab |
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Jul 19 2008, 06:47 PM |
I hope Scott reads this topic as soon as possible !
I don't recommend experimenting with "what can you put in between speaker and head" -------------------- For GMC support please email support (at) guitarmasterclass.net
Check out my lessons and my instructor board. Check out my beginner guitar lessons course! ; Take a bass course now! |
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Jul 19 2008, 06:49 PM |
Yeah man. Though, it's quite obvious. The poweroutputs are red, and have lightninggrahpics next to 'em. Should ring a bell.
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Jul 19 2008, 08:25 PM |
Well, the fuses will blow, if the wires fuse together. May still damage the cab though. Not necessarily , and definitely not if the wire melts and goes open circuit - that's when the real damage happens to a tube amp! -------------------- Check out my Instructor profile
Live long and prosper ... My Stuff: Electric Guitars : Ibanez Jem7v, Line6 Variax 700, Fender Plus Strat with 57/62 Pickups, Line6 Variax 705 Bass Acoustic Guitars : Taylor 816ce, Martin D-15, Line6 Variax Acoustic 300 Nylon Effects : Line6 Helix, Keeley Modded Boss DS1, Keeley Modded Boss BD2, Keeley 4 knob compressor, Keeley OxBlood Amps : Epiphone Valve Jnr & Head, Cockburn A.C.1, Cockburn A.C.2, Blackstar Club 50 Head & 4x12 Cab |
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Jul 19 2008, 11:06 PM |
What's the fuse for then, if not overload, andrew? Melt together=short circut=massive overload. If this is true A, our fuse cabinets at home would explode too, when the kid shoves something in the contact. Because tubes have high voltages in them, not high currents. Fuses protect against high currents only. When you disconnect the speaker from a tube amp, the secondary of the output transformer goes open circuit, which reflects back through inductive coupling to the primary making it also go high impedance. Since the impedance is high, the voltage is also forced higher as there is nothing to load it down. If the voltage goes high enough, it can arc inside the transformer, burning out the insulation, or in some cases, the raised voltages within the tubes causes arcing there instead. Either way, it isn't good, and a fuse won't protect you - but this is a peculiarity of tube amps only. -------------------- Check out my Instructor profile
Live long and prosper ... My Stuff: Electric Guitars : Ibanez Jem7v, Line6 Variax 700, Fender Plus Strat with 57/62 Pickups, Line6 Variax 705 Bass Acoustic Guitars : Taylor 816ce, Martin D-15, Line6 Variax Acoustic 300 Nylon Effects : Line6 Helix, Keeley Modded Boss DS1, Keeley Modded Boss BD2, Keeley 4 knob compressor, Keeley OxBlood Amps : Epiphone Valve Jnr & Head, Cockburn A.C.1, Cockburn A.C.2, Blackstar Club 50 Head & 4x12 Cab |
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Jul 19 2008, 11:36 PM |
Even if the tubes have high voltage, the current will still raise massively when you short circut, and the fuse will instantly blow. Also, you say the voltage will raise, but I don't understand this voltage=reistance*current, and when the wires melt, you get zero resistance, lower voltage. Am I thinking wrong? Enlighten me please. I'm saying the wires melt and go open circuit, not fuse together ... -------------------- Check out my Instructor profile
Live long and prosper ... My Stuff: Electric Guitars : Ibanez Jem7v, Line6 Variax 700, Fender Plus Strat with 57/62 Pickups, Line6 Variax 705 Bass Acoustic Guitars : Taylor 816ce, Martin D-15, Line6 Variax Acoustic 300 Nylon Effects : Line6 Helix, Keeley Modded Boss DS1, Keeley Modded Boss BD2, Keeley 4 knob compressor, Keeley OxBlood Amps : Epiphone Valve Jnr & Head, Cockburn A.C.1, Cockburn A.C.2, Blackstar Club 50 Head & 4x12 Cab |
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Jul 19 2008, 11:51 PM |
aha aha, I understand, and agree. Btw, a question to you. I have no cabinet for my tube amp, but I took the power tubes out. can it still be damaged? It's been working nicely, and still am, butI keep reading that it's not good having it powered up without load. Hmm ... well, without power tubes, you wont have the problems mentioned above because there will be no voltage going directly across the OT, but you will almost certainly be getting higher voltage across the preamp ... that in itself may or may not be a problem depending on the amp. At the very least it will increase your clean headroom and mean you probably get less preamp distortion.Worst case you might blow the tubes and/or other components, but that is not very likely. -------------------- Check out my Instructor profile
Live long and prosper ... My Stuff: Electric Guitars : Ibanez Jem7v, Line6 Variax 700, Fender Plus Strat with 57/62 Pickups, Line6 Variax 705 Bass Acoustic Guitars : Taylor 816ce, Martin D-15, Line6 Variax Acoustic 300 Nylon Effects : Line6 Helix, Keeley Modded Boss DS1, Keeley Modded Boss BD2, Keeley 4 knob compressor, Keeley OxBlood Amps : Epiphone Valve Jnr & Head, Cockburn A.C.1, Cockburn A.C.2, Blackstar Club 50 Head & 4x12 Cab |
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Jul 19 2008, 11:56 PM |
ohhhhhhhh andrew, so that's why my effects sound louder in clean channel than the others? Please explain this further, I need to learn this stuff! Not loader - cleaner ... distortion happens in tubes because they cant swing enough voltage to make a clean signal. If you increase the voltage they have to work with they can do louder clean work before distortion. For guitarists, we want that sweet tube distortion so this might make your amp distort less. -------------------- Check out my Instructor profile
Live long and prosper ... My Stuff: Electric Guitars : Ibanez Jem7v, Line6 Variax 700, Fender Plus Strat with 57/62 Pickups, Line6 Variax 705 Bass Acoustic Guitars : Taylor 816ce, Martin D-15, Line6 Variax Acoustic 300 Nylon Effects : Line6 Helix, Keeley Modded Boss DS1, Keeley Modded Boss BD2, Keeley 4 knob compressor, Keeley OxBlood Amps : Epiphone Valve Jnr & Head, Cockburn A.C.1, Cockburn A.C.2, Blackstar Club 50 Head & 4x12 Cab |
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