Hum in pedalboards is usually “ground loop hum.” You have two paths to ground, your audio ground and your power supply ground. You could use an expensive power supply with isolated grounds. But all you have to do is break one of the ground connections. You could disconnect the audio ground at one end of each of your patch cords. Or better, if you use one power supply, connect the hot and ground to only one of your pedals. Clip the ground wire on all the other pedal connections in your daisy chain. The power connections will then get their grounds through the audio grounds. No more hum
If you’re using temporal effects such as delay and reverb, these generally work best at the end of the chain. Putting a delay at the end allows the effect to give a more natural echo to everything that comes before it; the echo itself will not be altered by other effects. The same applies for reverb. Most guitarists leave reverb as the very last effect, occasionally using the amp’s in-built reverb over a pedal. Amps that have onboard reverb usually use a spring unit which produces a shimmery twang that works well for many types of music. However, if you’re looking for a roomier type of reverb that emulates a giant concert hall, a pedal based reverb is probably what you’re looking for. Either way, putting reverb at the end of the chain provides a spacious, natural tone that simulates a cavernous echo.
Modulation stompboxes like our BF-3 Flanger should be after the tone-producing effects like distortion, wah, etc. so they can process and modify the tone built by the pedals before it. If you put it before the distortion, then you are distorting the sound of the flanger. Maybe that’s what you’re after, but in general, put the BF-3 and other modulation effects after the tone-shaping (and noise–producing) pedals. And then there are the ambience effects: delay and reverb. As we discussed earlier, reverb—and sometimes delay, depending on the space—is the last thing that happens before the sound reaches your ears in a physical space, so these go last. Delaying reverb can sound muddy, so it’s usually better to have the reverb after the delay.