4x8 vertical in-line cab. Good idea?

#4
Lotsa folks like having a pair of 210s stacked vertically for the same benes, so maybe, if made with thin ply and well braced, this would make for easier load in/out?

Cool project, but definitely easier to just buy two 210s than to engineer and construct a cab.
 
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#5
For example i have a couple of this woofer which seems, although it has a foam surround, like the frequency response is excellent for bass guitar:

"TC-8034 8" Treated Paper Cone Woofer with Foam Surround 4 Ohm" from www.parts-express.com!

Four of them will need a vented enclosure with a volume of 3.16 cubic feet.

This one might work well for bass too but will need a 7.4 cubic foot sealed enclosure for four of them: "Goldwood GW-8028 8" Butyl Surround Woofer 8 Ohm" from www.parts-express.com!
 
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#7
n1as said:
I was thinking Faital Pro 8” drivers, about $45 each.
Click to expand...

this one? "FaitalPRO 8FE200 8" Professional Midbass 8 Ohm" from www.parts-express.com!

might work great. the PE website is great - most drivers, just scroll down to "optimum cabinet size" and it says how big it should be. Multiply by how many you are using. their support people can recommend a port diameter and length for a given application too.

There are calculators online that will help you figure out the design in terms of box length width and depth.
 
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#11
Timpanogos Slim said:
this one? "FaitalPRO 8FE200 8" Professional Midbass 8 Ohm" from www.parts-express.com!

might work great. the PE website is great - most drivers, just scroll down to "optimum cabinet size" and it says how big it should be. Multiply by how many you are using. their support people can recommend a port diameter and length for a given application too.

There are calculators online that will help you figure out the design in terms of box length width and depth.
Click to expand...
Yep, that's the speaker. I have one and have been impressed by its upper mid extension. Sadly, the optimum ported cab per Parts Express looks like an F3 of 52 Hz in a 1.2 ft3 box. That means the whole thing would be 5 cubic feet, 12 x 12 x 60!!! Oh, and it may give pipe resonances if I'm not careful. And with about 4mm of Xmax I suspect the array would be limited in power handling and overall volume.

But for $200 in speakers and some wood, it would be a fun project.
 
#12
Vertical 4x8 is a nice combination.

I'm going to be listing this pair of cabinets for sale soon. They have excellent Eminence neo drivers. They must not have sold very well, because Fender only made them for a short time.
IMG_5566.JPG
 
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#13
Timpanogos Slim said:
For example i have a couple of this woofer which seems, although it has a foam surround, like the frequency response is excellent for bass guitar:

"TC-8034 8" Treated Paper Cone Woofer with Foam Surround 4 Ohm" from www.parts-express.com!

Four of them will need a vented enclosure with a volume of 3.16 cubic feet.

This one might work well for bass too but will need a 7.4 cubic foot sealed enclosure for four of them: "Goldwood GW-8028 8" Butyl Surround Woofer 8 Ohm" from www.parts-express.com!
Click to expand...

At 92dB/1W/1M and 84dB/1W/1M, not a very good choice for bass guitar unless you like VERY low volume and I don't think you will find the high frequency response to be ANYTHING like what's mentioned. Maybe 1/2 that at 10dB down PERHAPS.
n1as said:
Yep, that's the speaker. I have one and have been impressed by its upper mid extension. Sadly, the optimum ported cab per Parts Express looks like an F3 of 52 Hz in a 1.2 ft3 box. That means the whole thing would be 5 cubic feet, 12 x 12 x 60!!! Oh, and it may give pipe resonances if I'm not careful. And with about 4mm of Xmax I suspect the array would be limited in power handling and overall volume.

But for $200 in speakers and some wood, it would be a fun project.
Click to expand...

I don't think you will find that you will be able to achieve the predicted response on this driver either, but you will get response past 5k at least.

For all of these drivers, you need to take the power handling with a grain of salt. They tend to ignore the power handling drop at low frequencies.
 
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#14
n1as said:
Tall & skinny. Four 8" speakers in a semi-pseudo-sort-of-line array for bass. Tall enough to get some sound to your head. I would envision a 12 x 12 x 40 inch box, about the size for a small amp to sit on top.

What do you think?
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Good idea. I have 4x 12"s, stacked in two cabinets on top of each other.Doesn't take up floor space in small venues.
Look for drivers that handle at least 120 watts RMS each.
 
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#15
agedhorse said:
I don't think you will find that you will be able to achieve the predicted response on this driver either, but you will get response past 5k at least.
Click to expand...

I don't have the url handy but I've seen a roundup of frequency response curves for a number of different "cabinet simulator" filters that try to make a flat-response PA sound like any of various popular bass cabinets. Nearly all of them roll off around 3khz.

On a 24-fret 4-string your highest fundamental is 392hz and your highest harmonics are between 4khz and 5khz.

Here is a 3khz test tone:



Here's 5khz:



With respect, I know it depends somewhat on your playing style, but how important is extension above 5khz to the average bass player?
 
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#16
n1as said:
Yep, that's the speaker. I have one and have been impressed by its upper mid extension. Sadly, the optimum ported cab per Parts Express looks like an F3 of 52 Hz in a 1.2 ft3 box. That means the whole thing would be 5 cubic feet, 12 x 12 x 60!!! Oh, and it may give pipe resonances if I'm not careful. And with about 4mm of Xmax I suspect the array would be limited in power handling and overall volume.

But for $200 in speakers and some wood, it would be a fun project.
Click to expand...
Just checked the specs. on this & think that it would be great for PA vocals etc but you probably wouldn't get much low end grunt. Which is Ok if that's your style. But 4 x 10s in a vertical array would be better, dollar per SPL.
 
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#17
Timpanogos Slim said:
I don't have the url handy but I've seen a roundup of frequency response curves for a number of different "cabinet simulator" filters that try to make a flat-response PA sound like any of various popular bass cabinets. Nearly all of them roll off around 3khz.

On a 24-fret 4-string your highest fundamental is 392hz and your highest harmonics are between 4khz and 5khz.

Here is a 3khz test tone:



Here's 5khz:



With respect, I know it depends somewhat on your playing style, but how important is extension above 5khz to the average bass player?
Click to expand...

I'm saying that rolloff of 2.5k, based on my experience, is unacceptable to most bass players. Because of the harmonic distribution, there's quite a bit of information between 2.5k and 5k which is why you do not see these drivers used without a mid driver to support what's missing.

Regarding your supposed limit of 4-5k, I think you will find that there's a lot more harmonic information up there than you realize. We wouldn't work so hard on voicing if there wasn't.
 
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