I like the trend that I'm seeing on these last couple pages. 
I knew I wasn't crazy! 
Okay... these are two totally different systems. Beast and Gorilla have two systems that are vented bookshelf designs. They just happen to get awesome response down low cuz they had the balls to test them full range instead of shoving in the "manditory" crossover @ or above Fb. Their systems will probably not take a full onslaugt of crazy bass movies at or near reference level. I encourage them to give it a shot but be careful doing so. Start -10dB and work their way up maybe. The amplifer requirements are not unlike any other speaker. You look at the sensitivity in the passband you're interested in. Being that theirs are resonant designs they shouldn't be very sensitive ~20hz. I forgot where their speakers were tuned to.
Mine will also be not so sensitive down low and I understand this. I'm using JBL 2226's which are not subwoofers. They are more like woofers/midbass. I am cheating though and using them sealed and clustered in sets of four raising their sensitivity in that way. Be sealed they will be MUCH more sensitive down around 20hz than theirs as they are tuned higher and 'should' be crossed in the normal sense. In that situation theirs would be +20dB down (or more) ~20hz and even moreso down in the 10hz range. I may have a 40dB advantage ~10hz simply because I went sealed. However, being that this drivers are limited in throw, even with four of them together won't produce a ton of SPL down low. I think it's still important to let them contribute to that overall output into the room, full range. I designed my system to have a flat excursion profile so they won't 'hit Xmax'. That will never be an issue even with an excess of 1,000w in each driver. Still the deep bass won't be as couch shaking as a lot of the awesome subs around here can do. What it WILL be able to do is crush your skull with midbass.
I knew I wasn't crazy! Quote:
Originally Posted by Eyleron 
What are the amplifier requirements at 20Hz for these speakers...say...yours or Gorilla's?
Is the woofer staying within linear Xmax at those frequencies and wattages?
As Bill F said, we're simply talking about another subwoofer existing in the same box as the speaker.
So, wouldn't another caveat be that the amplifier requirements for full range are similar to what we need in subs: 300w, 1000w, etc.?
If they can extend 20 Hz with authority, then they're like the two channel Hi Fi stereo speakers, and they're either not sensitive or they're humongous!
I'd add another caveat that we should be able to measure the change so we're not going backwards more than forwards?
What are the amplifier requirements at 20Hz for these speakers...say...yours or Gorilla's?
Is the woofer staying within linear Xmax at those frequencies and wattages?
As Bill F said, we're simply talking about another subwoofer existing in the same box as the speaker.
So, wouldn't another caveat be that the amplifier requirements for full range are similar to what we need in subs: 300w, 1000w, etc.?
If they can extend 20 Hz with authority, then they're like the two channel Hi Fi stereo speakers, and they're either not sensitive or they're humongous!
I'd add another caveat that we should be able to measure the change so we're not going backwards more than forwards?
Okay... these are two totally different systems. Beast and Gorilla have two systems that are vented bookshelf designs. They just happen to get awesome response down low cuz they had the balls to test them full range instead of shoving in the "manditory" crossover @ or above Fb. Their systems will probably not take a full onslaugt of crazy bass movies at or near reference level. I encourage them to give it a shot but be careful doing so. Start -10dB and work their way up maybe. The amplifer requirements are not unlike any other speaker. You look at the sensitivity in the passband you're interested in. Being that theirs are resonant designs they shouldn't be very sensitive ~20hz. I forgot where their speakers were tuned to.
Mine will also be not so sensitive down low and I understand this. I'm using JBL 2226's which are not subwoofers. They are more like woofers/midbass. I am cheating though and using them sealed and clustered in sets of four raising their sensitivity in that way. Be sealed they will be MUCH more sensitive down around 20hz than theirs as they are tuned higher and 'should' be crossed in the normal sense. In that situation theirs would be +20dB down (or more) ~20hz and even moreso down in the 10hz range. I may have a 40dB advantage ~10hz simply because I went sealed. However, being that this drivers are limited in throw, even with four of them together won't produce a ton of SPL down low. I think it's still important to let them contribute to that overall output into the room, full range. I designed my system to have a flat excursion profile so they won't 'hit Xmax'. That will never be an issue even with an excess of 1,000w in each driver. Still the deep bass won't be as couch shaking as a lot of the awesome subs around here can do. What it WILL be able to do is crush your skull with midbass.
But too cold to heat up enough to paint. Either I do crossovers for a few days, or beg a friend for the use of a heated garage!
