Jeffrey Stanton
Stunt Coordinator
- Joined
- Feb 25, 2003
- Messages
- 113
Hi Guys:
I need some help with figuring out how to run a passive subwoofer with a pro amplifier off of the LFE output of my DSP-A1. I bought a Mackie 1400i amp to power my passive sub. I ran the LFE of my Yamaha DSPA1 to the pro amp and got almost no sound at all from the subwoofer. If you put your ear to the driver you could barely hear it.
So I hooked the LFE to a Pioneer C-60 pre-amp and then to the pro amp. Got some sound. This was much better but had to turn the gains up ALL the way on both the pro amplifier and the pre-amp and the amp was still nowhere near it's maximum output, as the signal level lights on the amplifier were off most of the time, and only the bottom two would come on when the source material got loud. It's a 1400 watt amp, and the driver is rated for a maximum of 700 watts.
The reason I think the amp isn't being driven to full-output is that with 1400 watts applied to it, I believe my AV-15 would have shot across the living room and clobbered the cat. Is there just not enough voltage (even WITH the pre-amp) from the LFE output to drive the pro amp? If that's the problem, how do I get the voltage up to specs (so the pro amp can get driven properly?
What's your take on what might be going on here?
Thanks,
Jeffrey Stanton
I need some help with figuring out how to run a passive subwoofer with a pro amplifier off of the LFE output of my DSP-A1. I bought a Mackie 1400i amp to power my passive sub. I ran the LFE of my Yamaha DSPA1 to the pro amp and got almost no sound at all from the subwoofer. If you put your ear to the driver you could barely hear it.
So I hooked the LFE to a Pioneer C-60 pre-amp and then to the pro amp. Got some sound. This was much better but had to turn the gains up ALL the way on both the pro amplifier and the pre-amp and the amp was still nowhere near it's maximum output, as the signal level lights on the amplifier were off most of the time, and only the bottom two would come on when the source material got loud. It's a 1400 watt amp, and the driver is rated for a maximum of 700 watts.
The reason I think the amp isn't being driven to full-output is that with 1400 watts applied to it, I believe my AV-15 would have shot across the living room and clobbered the cat. Is there just not enough voltage (even WITH the pre-amp) from the LFE output to drive the pro amp? If that's the problem, how do I get the voltage up to specs (so the pro amp can get driven properly?
What's your take on what might be going on here?
Thanks,
Jeffrey Stanton