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Use a powered P.A. sub to extend a bass rig ?

Carvins 18" powered sub (700w RMS) is currently on sale for 549.00. Includes level (volume) control, Hi Pass filter, Crossover Freq. control, etc... Comes in colors too.

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For roughly the same price a 15/6 fEARful will blow it away, not only in the low end, but also across the spectrum, all in one cab and I'm talking lows with CLARITY.

Comes in colors too.
 
This approach makes so much sense that I'm a bit surprised it doesn't get discussed more here at TB.

I would think that the APPROPRIATE use of a sub could go a long way to addressing some modular cab needs/issues. Weight/power etc should be interesting issues to find out about.

I've got some Schroeder cabs that are a little light at the lower end, and might really benefit from this approach.

Am I missing something or some reason this is not a good approach?


IME, a rig with a ton of lows will cause problems with alot of rooms, and most FOH setups... My main rig is a Mesa M-pulse 600 into a PH810, and this thing has lows for days...There are some venues we play that I can't run as much low end as I like to, because it's either booming out the other side of the stage, or causing problems with the FOH... I can only imagine that running a sub on stage would be even worse in this regard...

FWIW, I play in a loud 2 guitar modern/hard rock band - with a pair of Triple Rec halfstacks for guitar rigs - we're pretty loud, and that's how *I* see this...


- georgestrings
 
IME, a rig with a ton of lows will cause problems with alot of rooms, and most FOH setups... My main rig is a Mesa M-pulse 600 into a PH810, and this thing has lows for days...There are some venues we play that I can't run as much low end as I like to, because it's either booming out the other side of the stage, or causing problems with the FOH... I can only imagine that running a sub on stage would be even worse in this regard...

FWIW, I play in a loud 2 guitar modern/hard rock band - with a pair of Triple Rec halfstacks for guitar rigs - we're pretty loud, and that's how *I* see this...


- georgestrings

I play in a rather loud classic rock band with two guitarists using Fender Twins. I would have agreed that cutting the low end helps avoid boominess, but since I'm now playing through a fEARful 15/6 I realize that there is low end mud and then there is low end with CLARITY. Most boominess in typical rooms is generated around 100Hz-125Hz, and not so much below. Few cabs really pump out nice, clean low end. fEARfuls do.

And since my band controls the PA (with two JBL SRX728 subs driven by two 4000 watt QSC power amps) I have heard my onstage sound and how it mixes with the PA. Real low end is not the enemy. Cabs that sound like mud in the low end, are.
 
I've been curious about this topic. My 410 doesn't seem to give me the smoothness I'm looking for on the low b...
Would it be best to sell the 410 and get a 210 or 212 and a 115 or 118 sub?

Nothing wrong with a well-made 10" driver loaded enclosure. I just sold an Acme 4 X 10 to a fellow TBer and replaced it with two 2 X 10 Acme cabs which I stack vertically.

FWIW, the Yorkville subwoofer mentioned by Walter (walterw) is a 2 X 10 and will kick the collective butt of comparable 15" and 18" enclosures.

Riis
 
Also, don't subs have volume knobs? I mean they aren't digital on/off. I would think there might be a appropriate level for a sub to fill in a little depending on FOH/stage etc just to provide a little reinforcement.
Some of the powered subs I have owned/rented did have a volume knob, but it was not like you have on a bass amp. It did not go from off to max volume. Rather it went from -20db up to about +10db or so.
There really isnt any reason you would setup a sub with the volume really low for bedroom jamming! It's there to facilitate lining up your subs output with your mid-high speakers.
With an SVT II or Mesa Bass 400 (just a couple of the many amps with a very hot output) you could easily be running the sub louder than you like with the volume knob cranked to its minimum.
Incidentally that Mackie I used to own was a nightmare.
Even for regular PA duty it was only capable of putting out mud and increasing the likelihood of PA feedback in the lower register. Without adding anything to the kick drums presence at all. Once I opened it up to troubleshoot a rattle. The toroid transformer of the power supply had come loose and bounced around inside. damaging the silver cardstock that shielded the audio electronics. That product turned me off of Mackie forever. I used to LOVE Mackie gear previously!
 
Zooberwerx said:
Nothing wrong with a well-made 10" driver loaded enclosure. I just sold an Acme 4 X 10 to a fellow TBer and replaced it with two 2 X 10 Acme cabs which I stack vertically.

FWIW, the Yorkville subwoofer mentioned by Walter (walterw) is a 2 X 10 and will kick the collective butt of comparable 15" and 18" enclosures.

Riis

So, sell the 410, go for 210 cab and 110 sub? Or... Huh?
And thx for the recommendation on the vorkville, I'll be sure to check it out!!
 
roland make a powered extention cab which can run full range or sub.
you have control on the tweeter in full range mode and low frequency sweep with the sub mode.
330 watt with lightweight speaker.they do a 15" which I have and I,m sure they do a 2x10 as well
 
A powered sub for a bass rig could be really great if implemented right or really awful if implemented poorly.

Essentially it is no different than using the PA support, except that only you would have control of it and only you would be going through it. If you had PA support, you better not be using that sub though. or else.

Reality is that you would probably be better served adding a sub to the PA and run both kick and bass through it.

Robby
 
I have a few basses that extedn down to the Low F#...

Couple of notes.. I had to build cabinets that would extend all they way up (Extended Range)... ended up biamping... works great.... many cabinets will not support this low freeq

IF you're willing to buy a sub.. why not just incorporate it to the PA and go direct?

Tim
 
I played thru a Bag End ELF system about 15 years ago.
Flat out the most amazing rig I ever played thru. (410 and an 18). I don't think I would ever wanna move it though!!!
I was told by many a sound guy if I ever showed up with that rig, I would be shot on site. A sub cab in the hands of a bass player can be a dangerous thing IMO!!!

Now, if I had to carry the room by myself, then yeah, I would use something like a powered sub. But I can honestly say from years of playing. that a full range rig (ie "normal" bass cab) should be perfectly fine.
 

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