I've seen 15.1 on the Caddy with the system low. I've seen at at 14.8 with system going though(with one SAZ1500). I'm waiting to see how well it will handle the new set up once all in.
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MECP Certified.
Alarm: Viper 5200
HU: Stock
Active Set-Up
Tweets: Image Dyamics CD1pro mini horns
Mids: Sundown Neo Pro 8s
Amp: Kicker IX500.4 (2)
Sub Stage
Subs: (2) Dayton Audio 15" HF
Amp: Kicker IX1000.1