Scan-Speek 4" for 49 cents?

[jbruner]

Alternate thread title: I'm a cutter now!

I've been trying out driver modifications on some old NSBs.


Sample2

I baselined 4 drivers and they were pretty much identical.

Here is the response of sample 1 before and after Revelator style cut and glue job.


Blue is modded, brown is baseline. I added a small piece of duct seal to the slit dust cap to smooth the top octave on this one. Sample 1-



The net result is very impressive. The primary break-up is reduced by 11dB, distortions of all orders are lowered, and subjective sound quality is much improved.

In other words, there is no downside, unless you like the sound of paper cone break-up.

[Sidi]

Re: Scan-Speek 4" for 49 cents?

underwhelmed.

[Adam_G]

Re: Scan-Speek 4" for 49 cents?

Looks like a lot of fun, thats for sure. Pretty cool results.

[cooper]

Re: Scan-Speek 4" for 49 cents?

Very cool experiment

[thekorvers]

Re: Scan-Speek 4" for 49 cents?

The net result is very impressive. The primary break-up is reduced by 11dB, distortions of all orders are lowered, and subjective sound quality is much improved.

In other words, there is no downside, unless you like the sound of paper cone break-up.

So I gather from all this that paper cone cut up is preferable to paper cone break up.:rolleyes: I would say the downside is having a destroyed cone.

[Whitneyville1]

Re: Scan-Speek 4" for 49 cents?

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

[Ryan_M]

Re: Scan-Speek 4" for 49 cents?

Cool experiment. Would like to see before/after distortion plots too if you got 'em. Though I read somewhere painting white dots on the cone will lift a veil as well....:D

[Pete Schumacher]

Re: Scan-Speek 4" for 49 cents?

So I gather from all this that paper cone cut up is preferable to paper cone break up.:rolleyes: I would say the downside is having a destroyed cone.

How is the cone destroyed if its still making music with less breakup and improved response in the pass band?

[jbruner]

Re: Scan-Speek 4" for 49 cents?

underwhelmed.

Maybe I can convince you to see it in a different light.

[jbruner]

Re: Scan-Speek 4" for 49 cents?

So I gather from all this that paper cone cut up is preferable to paper cone break up.:rolleyes: I would say the downside is having a destroyed cone.

But you have no idea how good it feels to slide a sharp knife through a speaker cone.

[jbruner]

Re: Scan-Speek 4" for 49 cents?

Cool experiment. Would like to see before/after distortion plots too if you got 'em. Though I read somewhere painting white dots on the cone will lift a veil as well....:D

THD zoomed in. Blue is after.



I could try white paint, but black paint had no effect, so it's doubtful.

[jbruner]

Re: Scan-Speek 4" for 49 cents?

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

Too right, Ricky; the sound went from awful to sorta tolerable. The point is to work up the courage to attack more expensive drivers.

[Ryan_M]

Re: Scan-Speek 4" for 49 cents?

Thanks. Definitely interesting results.

[craigk]

Re: Scan-Speek 4" for 49 cents?

underwhelmed.

this comment is underwhelming. what does this statement contribute, except to make you look like a jerk. this is exactly what is wrong with this board. a few years ago you would never have seen a reply like this.

[Thumper Tom]

Re: Scan-Speek 4" for 49 cents?

What would happen if you just did beads of thick super glue and not cut the paper?