Any REL sub system will work, or take home a ML Depth for trial?
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I have ML SL3's, Cinema and Aerius i's, with a Revel B15 - outstanding for both music and movies - fast as the stats. Found the REL wimpy in comparison, and the ML subs are a serious notch down. The Revel can be set up like the REL using it's internal crossover, and the 3 band parametric EQ works wonders.
If you want to go all-the-way, then it's the Aerial SW12.
Room has treatment already. 30hz may be 30hz, but would the woofer move air fast enough to integrate with stat panels, which are quick and nimble?
Fat pre? What do you mean by that? I do want to upgrade the pre, probably to a CJ Premier 17 LS2, unless I get a big fat bonus and can afford the ACT2.
Would you just run 2 outs from your pre, one to the amp and one to the sub?
Regarding your question - Your choice - You can 1) run to both amp and sub but you risk have overlap between the two, or 2) alternately, run to the sub, use the sub's internal crossover, then come back out to the main amp - the Revel is set up to do this.
This way you use the sub as integral to the mains, instead as a quasi LFE channel. This is what the others were mentioning regarding the REL
I've tried it with my SL3's and it integrates nicely. Don't set the xover too high though.
Some subs (incl.REL) run their inputs off the speaker wires, so you would be connecting wires from the speakers to the sub. The sub has a very high impedance, so isn't drawing power away from the speakers, but is reading the voltage signal going into the main speakers. The advantage to this is that if the power amp is coloring the sound in any way, the subs will have the same colorations being fed into the main speakers.
30Hz is not 30Hz, and all subs don't sound the same. Slow subs are subs that have poor transient response, dulling the attack of notes, or playing after the note has stopped. Perhaps they would all sound the same playing a 30Hz test tone (although prob'ly not), but that is not too common in music.
Woofers don't need to be quick...there is nothing quick about 30hz compared to the rest of the freq's. Most subs that don't mate well with small speakers are the falt of the speakers...not the sub. Know this, in order to mate a sub with a speaker with-out good clean output below 60hz requires a sub that can also do bass above the point of which most large subs are designed. This leads us to a point where many subs will falter...or in other words, not fast enough because they can not cover the freq's between the point where the speakers leave-off and where the sub is asked to take over.
Fat Pre?....A pre-amp that is only as good as some-one has lead you to beleave an tubed pre-amp should sound because it's their first tubed pre-amp and they along with you know no better as of yet.