Convert 2-way speaker to full range driver?

[Asterix2k10]

Hi,

Years ago I owned Omega Speaker Systems speakers with Tang Band full range drivers that I liked. Today I have a pair of regular 2 way speakers in box enclosures with bass ports. I was thinking of converting these to a full range driver speaker if possible. I thought I could use a 6.5” full range driver to replace the woofer, bypassing the crossover and tweeter. Will this work? Thanks.

 

[chrisb]

If the enclosure volume and port tuning match what your chosen FR drive require, the results might be quite fine. In other words, definitely a maybe.

 

[adason]

you can always close/stuff the port if it does not suit the fullrange

 

[planet10]

What box are you working with? What is the internal volume? Pictures?

dave

 

[chrisb]

you can always close/stuff the port if it does not suit the fullrange

The question as to enclosure volume remains, and not all FR drivers are necessarily suited to - or give their best performance in - sealed enclosures. If this is the OP’s first foray into single driver speakers, it’d be unfortunate to hobble him/her with a generalization that could be bad advice for a specific model.

 

[Soldermizer]

Not to be overlooked: if his box is too big, it's easy to make it a bit smaller by partially filling it with anything non-resonant and sealed, like sealed plastic bottles. If you need more volume, you'll just have to stretch the box so it's bigger

 

[Asterix2k10]

8206C68A-2B00-4DEF-ACF3-2D3D8A898AFC | Alon Wolman | Flickr

75A4130E-9744-4675-BA37-7A1C1D7DD04E | Alon Wolman | Flickr

Those are the pictures of the speakers. They are about 14” x 11” x 9”. The woofers are 6.5” and I was thinking of using these:

Tang Band W6-2313 6-1/2" Coaxial Full-Range Woofer

 

[planet10]

14x11x9, assumming 3/4” material is about 14 litres.

That TB is a 2-way.

The FF165wk, Alpair 10.3/10p/12p could all be fitted and the tuning tweaked to work with the driver in that volume.

dave

 

[Asterix2k10]

14x11x9, assumming 3/4” material is about 14 litres.

That TB is a 2-way.

The FF165wk, Alpair 10.3/10p/12p could all be fitted and the tuning tweaked to work with the driver in that volume.

dave

Thanks! I ordered a pair of these, can’t wait to try them out!

 

[Asterix2k10]

I went with the 10p. Here’s an internal pic. Looks like foam on the inside. F8C5AC31-C48C-4D61-90E3-78CDD6B39253 | Alon Wolman | Flickr

 

[seantkezm]

The ports will almost certainly need adjusting. Can you measure the exact dimensions of the existing ports? For that matter, were the measurements you provided outside dimensions?

In a 14 L cabinet, a 2 inch port, 5 inches long would give an F3 around 55 according to Bassbox.

 

[planet10]

Pull the foam out (and replace it with something natural like wool or cotton felt, and se eif you can get a better idea of the actual volume and i will calculate a proper vent size for you.

dave

 

[scottjoplin]

The question as to enclosure volume remains, and not all FR drivers are necessarily suited to - or give their best performance in - sealed enclosures. If this is the OP’s first foray into single driver speakers, it’d be unfortunate to hobble him/her with a generalization that could be bad advice for a specific model.

It could restrict the bass performance, anything else?

 

[planet10]

On 1st pass i would suggest a similar vent, but lengthen it to 5.7”. F3 is a meaningless number to the ear/brain, F10 gets near 40 Hz.

dave

 

[scottjoplin]

F3 is a meaningless number to the ear/brain

Only to those who are trying to fool themselves or others that they are getting good bass when they're not

 

[planet10]

Matt,

Not me saying that, that would be Floyd Toole, from his extensive real-world research.

F3 is only of interest if you are considering the roll-off as part of an XO.

dave

 

[scottjoplin]

All kinds of things will come into play, room and boundary gain and missing fundamental. So, it depends.....

 

[planet10]

All stuff Floyd considered when he stated that F3 is meaningless to the ear/brain.

dave

 

[scottjoplin]

So it's a meaningless blanket statement, ie, it depends.

 

[planet10]

Of courset depends, the room dominates below ~300 Hz, but the F3 does not play into that.

dave