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El Club de Diagramas es donde los técnicos intercambian y comparten Diagramas, Manuales de Servicio y todo archivo de información técnica útil para las reparaciones electrónicas. Todos los socios pueden agregar archivos al sistema, así es que juntos estamos creando la mayor base de información de servicio técnico. Few topics seems to stir up so much controversy and opinions as whether true bypass or buffered pedals are the best solution for your tone. In this feature we’ll have a look at what’s really going on as well as a few tips on how to arrange your pedalboard. However, tone isn’t just about squeezing your amp or stomping pedals. Tone is just as much about utilizing the full potential of your rig and regardless of your preferred approach, some basic know-how will get you far in reaching your goal.
The debate surrounding this topic seems to be incredibly one sided. Either you’re pro buffers or you can’t stand them and insist on only using true bypass operated pedals. But, as with most things in life, it’s not that black and white. Most guitars deliver a high impedance signal or output.
Impedance is a measure of electronic resistance and the longer the signal path, the more resistance there will be. Passive, vintage style pickups has a high impedance while active battery powered pickups has a low impedance. Passive high impedance pickups are able to drive the signal through aprox 18 feet of cable. Sometimes less, sometimes more, depending on the quality of the cable. Now, 18 feet might seem more than enough but you have to count both the cable to and from the pedal board, all the patch cables and the tiny cables inside the pedals that are bypassing the signal when the pedal is off. Naturally, the quality of these cables matters a great deal. You should also keep in mind that different value tone and volume pots, tone caps, shielding etc will have an effect on the impedance and ultimately the tone.
True bypass means that when the pedal is off, with no processing or colouring going on, the signal from your guitar passes through all clean via a separate path outside the circuit. You will recognize this by a noticeable high end roll off and generally a less open and dynamic tone and picking response. A buffer is basically a small pre-amp that will electronically strengthen or enhance the weak high impedance signal from your guitar and help driving it through long signal paths. The buffer is active regardless whether the pedal is on or off.
You will notice this by a more pronounced high end and a generally more dynamic and responsive signal. Hardwire bypass, employed by MXR among others, means that the signal is fed through the pedal’s circuit even when the pedal is off. Contrary to both true bypass and buffering, hardwire will affect your tone and cause considerable high end roll off and a generally less dynamic tone. We don’t want that, so let’s concentrate on the two other options.
The question is: do you really need to buffer the signal? Well, no one dies and the world will still be a fucked up place regardless of what you do. Some pedals, like vintage style fuzz, don’t like buffers and some guitarists prefer, and even depend on, the high end roll off you get from an unbuffered signal to achieve their magical tones. The point is though: you should be aware of the consequences of not buffering your signal.