If you need to create a high vacuum, there are basically two options: turbomolecular pumps and diffusion pumps. Turbomolecular pumps require rotors spinning at many thousands of rotations per ...

I tested a pair of Écoute Headphones to figure out what's going on with them and have a sample for you. 0:00 intro 5:06 Audio Comparison 6:37 Conclusion PRE-AMP: Nutube 6P1 Dual-Triode Vacuum Tube ...

Q. I purchased the mini blower you recommended and cannot believe the blowing power in that tiny device. Even after several months I continue to be amazed every time I ...

Whether your stairs are straight, L-shaped or spiraled, these best vacuums for stairs tackle the dusty steps. Cleaning your stairs might seem like an afterthought, but debris builds up there pretty ...