Keep your voltage up with proper electrical and check your readings regularly.
***PLEASE NOTE*** All information on this site is for entertainment processes. Any guidelines, tips or recommendations are considered general knowledge and we strongly encourage you to consult with a professional before installing, adjusting, or altering a car audio system.
A more budget friendly option is a portable SPL meter by SPL Lab. Although not the same software or equipment used by professionals, these meters can at least give you an idea of the level of pressure in your vehicle as well as help track gains after upgrades and adjustments.
Anytime you change wiring or add equipment always check your ohm load as it may change. Understanding ohm load takes knowledge of voicecoils, wiring (series vs parallel) and more, please as always consult a professional.
Equipment with prolonged play can become hot fast. the subwoofers as well as the amplifiers will need to be monitored during demos and comp. Blower and cooling fans can help with cool down and temp guns can mae it easy to double check your heat.
Beat the heat with this handy thermometer guns and make sure your equipment gets proper cooling off time.
Consult a professional for system tuning that will use an oscilloscope to check the signal output and correct your settings as needed. Such services can be done be you most car audio shops but you can also find free lance audio specialist in social network groups that may travel to your location.
These tools are great for popping panels in and out of any vehicle and can make that next install take a less time.
Find the right balance between quality and budget. Buying products that are cheap and not quality could result in replacement and expenses in the future. Best Practice is to start right and not have to do anything twice.