Scan-Speek 4" for 49 cents?

[jbruner]

Re: Scan-Speek 4" for 49 cents?

Thanks, Wolf.
Here's another picture and the on-axis comparison, blue original.

[Wolf]

Re: Pm180-8 ue

CHALLENGE ACCEPTED


PE never came through with free drivers, so I bought some. I will start a new thread for this one with a full set of measurements.

Attachment no worky.
Wolf

[jbruner]

Pm180-8 ue

Part Express linked to this thread on their facebook page. Hey maybe they could send jbruner some free drivers so he can improve them with slits and document the work and improvements. I mean something like oh I don't know say a pair of Dayton Audio PM180-8 6-1/2" :D

CHALLENGE ACCEPTED


PE never came through with free drivers, so I bought some. I will start a new thread for this one with a full set of measurements. Edit- New thread- How to Train Your PM180-8

[jbruner]

Re: Relapse

They are interested. Hell, I'm interested! Build it, measure it, and publish it right here!

[fatmarley]

Re: Relapse

Sorry if the suggestions seem like pressure. I'm only suggesting them because you seem interested and I guess I thought others who are interested in this thread may also be interested.

[jbruner]

Re: Relapse

Grow a pair? How rude

Seriously though - Tannoy wouldn't have put ribs on the back of their drivers if it didn't make an improvement. Not sure if it would work with the slicing though.

Do It Yourself And Stop Suggesting Hopeful Or Likely Experiments!

This is all in fun and jest, but more seriously guys, is science dead?
I've demonstrated effective, proven techniques and I get constantly bombarded with demands that I try every wackadoo mod anyone can think of.

[fatmarley]

Re: Relapse

Grow a pair? How rude

Seriously though - Tannoy wouldn't have put ribs on the back of their drivers if it didn't make an improvement. Not sure if it would work with the slicing though.

[jbruner]

Re: Relapse

You could try Tannoy ribs:

[ATTACH=CONFIG]57350[/ATTACH]

Or Fostex:

[ATTACH=CONFIG]57351[/ATTACH]

good research out weighs any pretty and ineffective ribbing

[fatmarley]

Re: Relapse

You could try Tannoy ribs:



Or Fostex:

[dlr]

Re: Relapse

I was sloppy on the Tangband and just used my finger, but on others I have used an eye dropper to apply just in the gap, wiped flush on both sides, for a much neater look.

I was thinking of the surround. The slits looked pretty smooth. The surround looks heavier.

dlr

[jbruner]

Re: Scan-Speek 4" for 49 cents?

underwhelmed.

Don't rag on him so hard! He turned a sow's ear into a pierced sow's ear.;)

I'd like to happily report that early predictions of "Meh", including my own, were wrong.

For the past year I have immensely enjoyed this little fullrange design, named "Silk Purse", utilizing an inexpensive 8-element contour filter.



Shown crossed at 100hz, on-axis and 30 degrees off-axis.

This design has been used at high spl (with a sub) and holds up well compared to some truly high-end speakers. It has a nice natural sound, even in the top octave. I'm quite surprised that cymbals and bells sound good on a fullrange 4" driver.

Also in white-

[jbruner]

Re: Relapse

Thanks, sounds like a good way to do it.

Looks like you've got a fairly thick application of the DAP.

dlr

I was sloppy on the Tangband and just used my finger, but on others I have used an eye dropper to apply just in the gap, wiped flush on both sides, for a much neater look.

[dlr]

Re: Relapse

The slits are just wide enough that the sides do not touch. I drag the knife backwards after cutting so the cut is visibly open.

Thanks, sounds like a good way to do it.

Looks like you've got a fairly thick application of the DAP.

dlr

[jbruner]

Re: Relapse

The slits are just wide enough that the sides do not touch. I drag the knife backwards after cutting so the cut is visibly open.

[dlr]

Re: Relapse

Did you actual cut out a section or just slice the diaphragm?

dlr