Quote:
Originally posted by jeffczyz
I'll through this into the mix, as I'm considering the bass shakers as well, but am totally clueless on how do set this up. I'll look for everyone's expertise on what I need to do.
I'll have 7 recliners. I would like to put 1 shaker under each recliner.
I assume I would split my LFE signal with a Y-connector and then go 1) to my Sub and 2) to the amp.
My question is, what type of amp do I need? Are there amps that would allow me to power 7-25w shakers or would I need 2? Can someone provide me a link to a cost effective amp solution?
Thanks
Jeff |
The most crucial part of wiring 7 Auras is to get the impedance correct. Wiring them all in parallel would be devastating to almost any amp (nominally 0.57 ohms!). Running them all in series would present a nominal impedance of 28 ohms - just hard to drive.
You would need to run them in combinations of series and parallel so that you net an acceptable nominal impedance. You also have to have relatively 'uniform' current flow through each shaker.
There are two possible solutions as I see them to yield the closest to 4 ohms as possible, which is ideal for sub amps.
The first is to run one set of 3 in series (12 ohms) and one set of 4 in series (16 ohms), then run these sets in parallel to yield a nominal 6.9 ohm load. This is also the most uniform in terms of current flow per shaker (meaning most uniform power output).
The second option is to run two sets of 2 in series (8 ohms each) and a set of 3 in series (12 ohms). Then these 3 sets in parallel yielding a nominal 3 ohm load. There is a slightly larger difference in the current flow through the set of 3 vs the sets of 2.
Then the best amplifier solution BY FAR would probably be the 250W subwoofer amp from PE (#300-794). I have a friend who uses the 120W version (300-792) for 4 of the Auras with great results. 7 Auras would need more juice.
The major benefit as has been stated before is that you have far better control with these amps due to a local low pass filter and local gain control. My friend uses 45-50Hz to the Auras while his sub out that feeds it (and his real subs) is at 80Hz. You also have the option of turning the amp off for music if you so desire.
Good luck!
- Dieter