Amplified speakers and audio repeaters –
I use the PicoBoo for two effects but it is limited in terms of audio length. For scenes where I need longer audio tracks and multiple audio tracks I use the Wav Runner from HauntBots. Works great, lets you save multiple tracks to one SD card and sequence through them or trigger each track. Comes in either replay only or triggerable as well for $130. There are many others out there but I found these to work really well.
For speakers I use a variety of types. I have some from OnlyFactory (or something like that) that have a USB player built in and a built-in battery. Works great on things like our golf cart and tram. The audio repeater plugs in via mini plug (just like a headset in a radio). I also have some speakers that are simply powered (amplified with no player) I bought this year for some of my other scenes.
I have some smaller speakers that are actually monitor speakers for recording studios. I bought them for my studio and found them to be real handy in the haunt. They are usually a little more expensive but very versatile and put out a lot of sound. Musicians use powered speakers for monitors so they don't have to add another amp in their PA system.
I also have a 32 channel PA system, with mixing console, speakers (SP2s which are big speakers) and amplifier that I use for area sound. The entire ticket area and concessions are covered by this system. The audio repeaters simply plug in where an instrument like a guitar would plug in. I can also run smaller individual powered speakers out of this console through the effects send channel. Gives me a lot of versatility in controlling where I put sound from one central location.
Being a sound and lighting guy, I prefer working with entertainment PAs and playback systems. I've never used a 70v system so can't tell you much about those. I have distributed sound though through a building using a PA system and some creativity!
Travis "Big T" Russell
Big T Productions Inc
Owner and Operator of "The Plague" and "Camp Nightmare"
Customer Quote of the year: "Damn, I pissed myself"