Anyone used these dynavox woofers?

[Bill poster]

Dynavox LW5004PMR 5-1/4" Woofer

Dynavox LW6004PMR 6-1/2" Woofer

What I don't understand is that the smaller one in winisd, according to parts express specs, needs a much larger box (17-18 litres) and goes down much lower. Maybe I got this wrong..Is this correct and if so why would this be?

 

[bjorno]

Dynavox LW5004PMR 5-1/4" Woofer

Dynavox LW6004PMR 6-1/2" Woofer

What I don't understand is that the smaller one in winisd, according to parts express specs, needs a much larger box (17-18 litres) and goes down much lower. Maybe I got this wrong..Is this correct and if so why would this be?

Hi Bill,

It's all about T/S...

b

 

[Bill poster]

Cheers fella, makes more sense now; I like the smaller ones but can't see any stockist in europe unfortunately

 

[Taterworks]

If you have any other questions on usage, Ben "Wolf" Shaffer has worked with the 5-1/4" Dynavox woofer and can probably point you to the right tweeter, crossover tweaks, etc.

 

[Inductor]

Two Dynavox LW6004PMR 6-1/2" Woofers with Vifa DX25TG tweeter with crossover.
http://www.diyaudio.com/forums/multi-way/163796-some-design-help-please.html#post2130531

http://www.lyeco.com.tw/co.htm

 

[Bill poster]

Thanks taterworks/inductor, its a possible project ie a friends wants me to make him a set of monitors for his home studio.
I thought of using the excellent jordan JXR6 crossed with either of the dynavox units or possibly an aluminium woofer like the FW168 (but power handling is just 50 w).

The jordans i can get a bit cheaper than normal and also the cabs in corian through a fabricator mate, so i reckon all in around 350 euros for a cracking pair of monitors.

One Q. because the dynavox material is different to the jordans, will using a 1st order(at 375 hz) cause a problem?

 

[Inductor]

There was a big problem with that with the voxs. I would have to look again. Can you be more explicit? The 375 Hz would be a (new) possibility...

 

[Bill poster]

There was a big problem with that with the voxs

Can you be more explicit?

?? sorry, bit confused by the reply.

 

[Inductor]

Probably the low xover frequency makes it possible to use a 1.order, but the attenuation is not very nice as seen from it's (driver) output frequency (from my memory). I think you mention 1.order and it requires very good (behaved) drivers.

 

[Einric]

Load a small box (.35) in Iso-Barik and tune the ports (I chose three) for GREAT theoretical response.

 

[Einric]

.545" ID is the Measurement of 1/2" Type L Copper Pipe. It should be easy to find at the hardware store.

 

[wolf_teeth]

You can't use 1st order, but why would you xover that low anyway?

Would this suffice?

I love 'em!!
Later,
Wolf

 

[Bill poster]

Probably the low xover frequency makes it possible to use a 1.order, but the attenuation is not very nice as seen from it's (driver) output frequency (from my memory). I think you mention 1.order and it requires very good (behaved) drivers.

I'm not sure about its behaviour etc(6" dynavox)). Now thinking to use in a 3 way design, so would an x/o at around 350hz 1st order to a suitable woofer work? Looking to keep everything as simple as possible... if poss.

 

[wolf_teeth]

I'm not sure about its behaviour etc(6" dynavox)). Now thinking to use in a 3 way design, so would an x/o at around 350hz 1st order to a suitable woofer work? Looking to keep everything as simple as possible... if poss.

The breakup isn't bad on the Dyn 6, but it is present. 350 Hz first may work okay.
Wolf