Diamond stone sharpener. Easy to use and saves a lot of time cutting easily and piling up firewood quickly. Takes a dull chain and makes it as sharp as new and it holds its edge like a new chain!

Mackie hm-4 headphone amp can be used to share one stereo source with up to four headphones. Some people say it's mono, but i'm willing to bet they are using a ts cord or 1/4 guitar cord to bring in signal not a trs cord or balanced stereo cord.

The mackie is way better (no noise and the knob is more precise and feels better) than the donner. Adjustment is pretty straightforward, but the knobs do wobble. Improves the volume massively, but it is not an equalizer.

Chirchofriffs uses a zoom r recorder and a zoom h4n-pro recorder for audio pre-production and post-production of live interviews and discussions. It's also great if you're producing multi-person podcasts. On top looping because of the speakers and wha...  Read More

This mini headphone amp is gooooood. This distribution amp is well suited to my particular application where distortion must be avoided.

This headphone amplifier is portable and sturdy, as advertised. It weighs less than a pound, so it is easy to carry around. Plenty of headroom.

Mackie's desktop headphone amp has a bad channel in the headphone 1 mix. Adds a ridiculous amount of static, and the input port stopped working properly. The knobs are fragile and very cheaply made.