Ahhh buffers. I believe these are essential on rigs especially on (huuuge) pedalboards of true bypass purists. To those who don’t use pedals but use long cables (keyword: cable capacitance), this help keep the highs intact.  I use my Boss TU-2 as the first buffer on my board and the TC Electronic Nova Delay at the end.

Here’s a brief description from the dunlop site –

When you run your signal from your instrument to your amp though long cables and/or through a large array of effects with varying impedances, there’s bound to be some signal degradation. Placing the MC406 Buffer in your signal chain addresses this issue.

- It’s a low-noise buffer in a small, rugged housing;
- it can add up to +6dB of gain with the front-facing gain slider;
- it makes up for signal loss that can occur when combining effects with different impedence levels;
- it fine-tunes signal recovery with Hi and Lo cut switches;
- it has an extra output for a tuner, separate effects chain or amp, and can be set to receive either a buffered or unbuffered signal;
- it also features a convenient 9VDC power output jack provides power for another pedal.

It truly is a mighty utility with a small footprint—an ideal addition to any effects rig or pedalboard!

Price tag is around $99. Buff-oons unite \m/

This article is a good read for those curious what this buffer thing really is – http://screaminfx.com/tech/why-and-when-to-use-a-guitar-buffer-pedal.htm