can increase pad life and keep it from slipping around. Hard [[File:Dance Dance Revolution 4thMix Plus arcade machine stage.jpg|200px|thumb|right|The arcade version of Dance Dance Revolutions two-player dance platform is an example of a hard pad.]]"Hard" pads are usually constructed with metal (and sometimes wood) for durability, and usually come with a raised bar behind the player. Arcade machines use very durable metal pads that are designed for heavy use. Other hard pads can be purchased for home use with a video game system; the prices can be around US$100 to $350 ($200–$600 for double pads) - $700 to $1000+ online. Manufacturers of hard pads include DDRgame, Cobalt Flux, MyMyBox, Brown Box, RedOctane (ceased production as of February 2010 due to company termination) and Naki International. Hard pads are used in all arcade versions of music games that employ dance pads, and often serve as the nec plus ultra for DIY Gamers that attempt to construct "Homebrew pads." Many Homebrew kits are ultimately instruction guides for converting soft pads into hard pads, although Homebrew hard pads often feature additional functions such as additional inputs (see below). Solid State "Solid State" pads''' replace the usual mechanical switch and contact used in other hard pads. A proximity sensor is used to detect a player's steps on the pad. The advantages of a solid state design is that they do not require pressure to activate, eliminating moving parts that might break down and keeping dirt from getting into the mechanism. Caveats Problems are often encountered when attempting to use a PlayStation pad with a computer simulator. Most PlayStation-PC adapters will not register Up and Down, or Left and Right, simultaneously initially, although they are common "jumps" in dance games. This is because normal PlayStation games do not require such input, and because D-pads are not usually designed to physically permit such input. StepMania's website has a section concerning adapter compatibility. Although these devices may work on a PC, to date, the adapters will not work with consoles that have built in USB ports such as the PlayStation 3 and the Xbox 360. Purchasers of home pads should be aware of the number and arrangement of active arrow panels that are required by the game(s) they want to play. Although most commercial pads have four arrow panels (DDR/In The Groove), some have five (Pump It Up), six (Dance Dance Revolution Solo 2000), eight (Dance:UK), (MC