Audio Asylum Thread Printer
Get a view of an entire thread on one page
|For Sale Ads|
In Reply to: RE: Efficiency of main speakers with subwoofer posted by Tubenstein on July 04, 2017 at 10:16:35
If you roll off the mains (some don't, including myself) your main amps will see less of a load, thus you could do with smaller amps.
I see no issue with rolling off your mains, so long as the xover is well designed/made, and the xover point is suitable. If running one sub I generally prefer a much lower xover point, say around 40Hz (I run dual subs at around this point). Also, I would not remove your amp and buy a 25% lesser powered amp based on this fact, as the actual volume required doesn't directly equate to watts generated. So maybe now you can get away with a 90 WPC amp...?
Now the reverse of that, is you've removed the bass, which is the most demanding on the amp.
Do you already have a 100W tube amp? If so, and you're happy with the match/sound, I wouldn't rush out to get a smaller amp. Just me maybe...
I have 100w amps on the speakers. Assume adding the subwoofer with 95hz cutoff, I would like to give 35w push pull amp a try. I want to see the possibility
The subwoofer I want to try is Bag End and it's crossover is fixed at 95hz.
In my system, i Also high pass the main speakers, but at a frequency above that of the low pass to the sub. Sub crosses about 40 to 45hz while the high pass to the main speakers is 50 to 55hz.
The 'gap' is filled in since neither filter is 'brick wall' and either 24 or 12 db/octave.
You are being VERY optimistic about how much power you will 'save'. The 50:50 power distribution point is roughly 350hz.
How do you intend to mediate the crossover?
Too much is never enough
Post a Message!
This post is made possible by the generous support of people like you and our sponsors: