Flex Your PCD Mettle:

[Skywave-Rider]

Re: Flex Your PCD Mettle:

....I'm of italian decent myself and i stand by my heritage......and my post. Sorry if the terms Fascist and political figures such as Mussolini offend you.

This is funny?

[Zilch]

Re: Flex Your PCD Mettle:

I will resolve this herewith:

Italians are "Mediterranean."

[They also make CLIO and DE250.... :D ]

[Cerdic]

Re: Flex Your PCD Mettle:

Waveguides received via FedEx - check!

Parts ordered for an L/C/R set of SR's - check!

To confirm: What is the forward axis of the Ewave SR? Am I reading the graph right in that it's -0.49 degrees? Most of the other designs are 2-3 degrees, which coincides with a listening position of 12-13 feet (which is spot on for me)...

I plan on flush mounting the waveguide into the baffle, and making a double thick baffle with additional ring to allow the woofer to be front mounted, with an appropriate woofer setback and a roundover of the baffle edge of the woofer hole. I can make the woofer setback anything from 0 to 1.25", just trying to make sure it's got the right steering/axis. Fun with routers! :D

BTW, where do you find the 3 strand sheathed wire that attaches the L-pad to the x-over? HD/Lowes?

Best,
Christopher

[Flacjunky]

Re: Flex Your PCD Mettle:

BTW, where do you find the 3 strand sheathed wire that attaches the L-pad to the x-over? HD/Lowes?

I found some 4 wire stranded 16 gauge thermostat cable at Home Depot a couple days ago.

$.67 per ft.

I just cut off the 4th wire.

[Cerdic]

Re: Flex Your PCD Mettle:

I found some 4 wire stranded 16 gauge thermostat cable at Home Depot a couple days ago.

$.67 per ft.

I just cut off the 4th wire.

Perfect, and by the foot. I certainly don't need a lot of it. Thanks!

C.

[Zilch]

Re: Flex Your PCD Mettle:

To confirm: What is the forward axis of the Ewave SR? Am I reading the graph right in that it's -0.49 degrees? Most of the other designs are 2-3 degrees, which coincides with a listening position of 12-13 feet (which is spot on for me)....

Yes, that's my normal target, BUT, look at the vertical polars:

http://techtalk.parts-express.com/sh...32#post1657732

The forward lobe is asymmetric and upwardly biased, which is why I left the forward axis just below center.

BTW, where do you find the 3 strand sheathed wire that attaches the L-pad to the x-over? HD/Lowes?

That's a Belden 18ga. cable. I have a spool of it that's been sitting around here for 40 years.

[It's running low now, tho.... ;) ]

[Cerdic]

Re: Flex Your PCD Mettle:

Yes, that's my normal target, BUT, look at the vertical polars:

http://techtalk.parts-express.com/sh...32#post1657732

The forward lobe is asymmetric and upwardly biased, which is why I left the forward axis just below center.

Got it. Boy, my head aches trying to sort out all the polar maps and response curves. I knew there was a method to your madness, and now it makes sense.

So I am targeting 3/4" between the back of the WG lip and the front of the woofer basket rim, right?

[Zilch]

Re: Flex Your PCD Mettle:

So I am targeting 3/4" between the back of the WG lip and the front of the woofer basket rim, right?

Correct. Flushing the waveguide probably won't make a huge difference, but only measurements would tell.

Once the waveguide is flushed, I intend to do a 3/4" roundover on the woofer opening, which will impinge a bit on the waveguide edge, center bottom, as well. To accomplish that, I'll just rout it with the recessed waveguide in place....

45046/727=61.9615

[Flacjunky]

Oh, Me Soooo Horn-y

Well, I finally got the new mains up and running last night.

If this is what entry level honk and nulls sound like ...... I'm diggin' it. :D

My First Crossover

Funny how it took me 3 evenings to do what you did in a few minutes on your youtube video.

Soundcheck

Time To Jam

They certainly sound “different” than my old Dome Midrange 3-way. Much warmer, more detailed midrange. Pretty good punch out of the Pro-Woofer. Doesn’t dig real deep, but my subs should take care of that.

Heard some things in Dark Side Of The Moon that I never had before. (Clare Torry whispering "I never said I was frightened of dying" at about 3:30 on Great Gig in the Sky)

With my old speakers my “get down” Receiver volume was between 55 and 63 ….. these will run your a** out of the room on 45.

55 Hurts.

My room, by design, has no windows, or for the time being any electronic sources of light, so when you turn off the lights its pitch black. Thats how I listened to Dark Side Of The Moon last night. But what was weird was you couldn’t really pinpoint the direction the sound was coming from. It kinda just filled the room with sound …… An anonymous wall of digital sound ….. cant wait to power up the subs now.

I want to thank Zilch, Pete, and everyone else here that held my hand through this rewarding learning process.

[Mayhem13]

Re: Flex Your PCD Mettle:

Nice Job Flac! I'd consider a bit of room treatments in the way of some acoustic foam on the ceiling around the Ewaves. I have almost the exact CC speaker in my HT and the midbass was a bit boomy from boundry gain and ripple but cleaned up nicely with the foam. It won't be as dramatic in your case with the directivity of these as my CC is a dome tweeter and mid so not much directivity there.

[Zilch]

Re: Flex Your PCD Mettle:

Your project is linked from Page #1.

Beautiful job!

Good work on the crossovers; it's them long screws took all that extra time.... ;)

http://techtalk.parts-express.com/sh...d.php?t=215536

[Mayhem13]

Re: Flex Your PCD Mettle:

Found this on RCF 101/350 with RCF 8NB woofer crossed 1.8khz.....the translator made a mess of the text so i'll refrain from any further quoting of the design but....

[Flacjunky]

Re: Flex Your PCD Mettle:

Your project is linked from Page #1.

Beautiful job!

Good work on the crossovers; it's them long screws took all that extra time.... ;)

http://techtalk.parts-express.com/sh...d.php?t=215536

Thanks, please note that I didn't have to make a trip back to the hardware store in town because they were too short. ;)

Incidently, is part of the SR Low Pass crossover baffle step compensation, that I probably didn't need due to being wall mounted?

[Zilch]

Re: Flex Your PCD Mettle:

Incidently, is part of the SR Low Pass crossover baffle step compensation, that I probably didn't need due to being wall mounted?

1.5 mH/18 uF is a modest lowpass. The parallel notch filter, R4||C4||L3 is primarily mitigating a peak in the woofer response between 400 and 800 Hz, but that might be considered BSC, even though it's not shelving. If you're finding they are too "warm" sounding once your subs are running, then you might try bypassing that, meaning shorting that parallel combination. It that's then too "forward," send Pete a PM and ask him to jump in here with a recommendation.

Is your cab split into two chambers up there? If so, what is the volume of each?

Found this on RCF 101/350 with RCF 8NB woofer crossed 1.8khz.....the translator made a mess of the text so i'll refrain from any further quoting of the design but....

Link us to the project, please; that thumbnail does not enlarge.... :(

[Skywave-Rider]

Re: Oh, Me Soooo Horn-y

My room, by design, has no windows, or for the time being any electronic sources of light, so when you turn off the lights its pitch black. Thats how I listened to Dark Side Of The Moon last night. But what was weird was you couldn’t really pinpoint the direction the sound was coming from. It kinda just filled the room with sound …… An anonymous wall of digital sound ….. cant wait to power up the subs now.

I want to thank Zilch, Pete, and everyone else here that held my hand through this rewarding learning process.

Flacjunky,
I know you have a narrow room and no toe in, but have you tried tweeters to the outside?