Fire Alarm Guy In Trainin
Member
- Location
- las vegas, nv
Ive been looking online for a battery calculator specific to the devices im installing. i have two dorms one with 96 speakers at 1/4watt and one with 66 speakers at 1/4 watt. i have a wheelock sp40 feeding audio signal to a wheelock booster that has two 80watt channels. i have the system set for 25v NOT 75v. i just failed my first inspection... i had 4x 12v 12amp/hr batteries in paralell series for the booster and only 2x 12v 12amp/hr batteries for my sp40 i was only getting 3.4dcv from my audio out on my sp40 and 8.6dcv to each of my audio cards on the booster panel. needless to say it was insufficent to produce any voice messages from any speaker in the system. i still had 24dcv powering each audio card and 24vdc to the sp40. so im confused as to why the output signal was so low and need help to figure out what i need to do to make these speakers work for 15min on battery power after 24hrs in standby on battery power.