Franken rig

[lastnotleast]

Just picked up a Hartke ha4000 to run my Yammie 5 through an Acoustic B410 & B115. It has an SBass out for just low end to a seperate amp/speaker.
This fascinates me (don't take much apparently). I will have my GK BL600 at gigs anyway as backup so why not use it for the SBass?

My question is: because the Acoustic cabs are sealed, perhaps a ported 15 for the SBass would fill in some missing vibes.

I understand that the usefulness of this is diminished when running though the mains (would probably only run the 410) but for the larger venue when not running through the mains... well, you get the idea.

[Mr. Foxen]

Is that a low passed output? Find out where the low pass is, get a subwoofer suited to that range. No point in low passing into a cab designed for fullrange. Really, high passing a cab so they don't interfere with the lows is the better way if you insist on mixing cabs.

[lastnotleast]

Indeed. What I find from the user manual is only this (but nontheless daunting);

SBASS Out -[size=4]This standard unbalanced 1/4" jack provides a line-level (+4 dBu) [/size][size=4]pre-EQ and pre-Shape (but post-Volume control) output signal which contains [/size][size=4]subharmonic information from the HA4000. [/size]
[font=sans-serif][size=5][size=4]WARNING: Because of the extremely low frequency signal output from this jack, this should only be connected to a separate amplifier (one with a volume control) that is driving a subwoofer. [/size][/size][/font]
[font=sans-serif][size=5][size=4]Connecting theSBASS output to an amplifier driving a standard speaker[/size] [size=4]even one designed for bass may cause irreparable damage to the speaker[/size][/size][/font]

[font=sans-serif][size=5][size=4]The only other clue is the description of the DBass control in the EQ array[/size];[/size][/font]
[font=sans-serif][size=5][size=4]Equalizer (HA4000)[/size]
[font=sans-serif][size=5][size=4]DBASS (70 Hz) 0 -> +12 dB[/size][/size][/font]
[font=sans-serif][size=5][size=4]Low (140 Hz) ±15 dB[/size][/size][/font]
[font=sans-serif][size=5][size=4]Mid Low (sweepable, 40 Hz - 400 Hz) ±15 dB[/size][/size][/font]
[font=sans-serif][size=5][size=4]Mid High (sweepable, 300 Hz - 6 kHz) ±15 dB[/size][/size][/font]
[font=sans-serif][size=5][size=4]High (5 kHz) ±15 dB[/size][/size][/font][/size][/font]

[Balcro]

I take it that your version of those 2 speakers is not necessarily the current one. According to "guitarcenter" the 410 is a sealed cabinet and the B15 is ported. If you're also using them with the horns switched on, you'll have perhaps a little more top end than you seem to prefer. There will almost certainly be an imbalance between the volume from a 4x10 and a single 15.

You could try putting the 15 on top of the 410.

Balcro

[lastnotleast]

Apparently I am not being clear enough. I will be using the Hartke with a 410 and a 115 without question.

The Hartke has a unique low frequency output call "SBass" for sub bass.
I would run this line out to a seperate amp (GK BL600) with another or third cabinet for just the low end only.

What speaker/cabinet is best for this third, seperate, low frequency only application?

[Mr. Foxen]

[quote name='lastnotleast' timestamp='1368472877' post='2077544']
What speaker/cabinet is best for this third, seperate, low frequency only application?
[/quote]

As per the manual: a subwoofer.

[lastnotleast]

Any speaker can be used as a subwoofer, even an 8" as long as it is is fed only low end by (ussually) a crossover but Hartke's SBASS out sends only very low, mostly inaudible frequencies.
I think I understand now why Hartke dropped the SBASS out idea; no one understands how to use it.
I abandon this quest because, as stated initially, when in a venue large enough to warrant this application, I will be direct through the mains anyway.

[Mr. Foxen]

That isn't true. Most speakers can't reproduce sub bass, so can't be used as a subwoofer. That is why subwoofers exist.

[Balcro]

These links below show you the tools for the job.

http://www.parts-express.com/cat/subwoofers/14

http://www.eminence.com/pdf/LAB_12_cab.pdf

If you read the notes at the bottom of the .pdf, it doesn't look like this type of speaker is for the faint-hearted.
Despite their specialist design they can still be over-driven.

Balcro.