My first build thread. The Ocelot(s).

[monkish54]

Pictures and info to arrive soon.

 

[STRONGBADF1]

Well...

 

[AcuDefTechGuy]

I can't believe you have time with college and all.

When I was in college, my only priority was academia and graduation and finding a career/job. So I took as many courses as possible all year round.

No weed and booze for me.

Then after I graduated with a nice solid career, I only had time to buy speakers and electronics.

 

[Adam]

Hats off, Monk. You might have just pulled an Apple - by starting a frenzy of interest by announcing that something new will be coming out, but giving no real details or a time frame. "What will it look like? How much will it cost? When will they be available?!? I need DETAILS!!!"

Let the rumors fly. I can only hope to hit over 100 posts in this thread before any details are announced.

 

[monkish54]

Sorry to disappoint, Adam, but I'm taking pictures now. Let's see how many times you can post in this thread in the next 45 minutes.

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[Adam]

Sorry to disappoint, Adam, but I'm taking pictures now. Let's see how many times you can post in this thread in the next 45 minutes.

Challenge...accepted.

30 second timer...activated.

 

[Adam]

Alright...I just can't do it. I mean, I can, but I won't. I am looking forward to the pics, though!

 

[monkish54]

The Ocelot is a fairly large monitor intended for nearfield listening and, perhaps, a center for my Philharmonics. We'll see how the crossover goes.

The speaker measures 14" X 13" X 11". Not exactly small for a monitor/bookshelf speaker.

The drivers used are the:

Dayton RS28A

Zaph Audio ZA14W08.

The sealed enclosure is 19 liters internally. The F3 is 94hz.

Max SPL around 97db limited by woofer excursion.

*My woodworking skills are absolutely terrible. If you expect pretty pictures of well built speakers, i recommend SalkSound's website.

Since this is my first speaker I decided to only build one cabinet and see how it turns out. If i am satisfied with the results, I will build the second cabinet.

Pictures to come.

 

[monkish54]

I can't believe you have time with college and all.

When I was in college, my only priority was academia and graduation and finding a career/job. So I took as many courses as possible all year round.

I'm on break. Lat semester I had six classes.

No weed and booze for me.

I can fix that for you, friend.

 

[monkish54]

PICTURES
Front baffle awaiting its fate:

Bracing goes in:

In goes the stuffing:

Close up of the denim insulation:

 

[TheStalker]

Why didn't you just buy a prefabricated Dayton box from Parts Express? These things are dirt cheap, look great, and work very well for experimenting, etc. This one is plenty big enough for that midrange of a driver: Dayton Audio TW-0.38BK 0.38 ft³ 2-Way Cabinet Gloss Black | 302-710

It's only $85 and comes with magnetic grills and removable front baffle. You really can't beat that.

 

[Chu Gai]

Why did you call it the Ocelot?

 

[monkish54]

Why didn't you just buy a prefabricated Dayton box from Parts Express? These things are dirt cheap, look great, and work very well for experimenting, etc. This one is plenty big enough for that midrange of a driver: Dayton Audio TW-0.38BK 0.38 ft³ 2-Way Cabinet Gloss Black | 302-710

It's only $85 and comes with magnetic grills and removable front baffle. You really can't beat that.

I have plenty of MDF left from my two subs so the cost of the cabinet is $0 and building the cabinet myself is much more fun. I'll never get better at woodworking if I don't practice. Everyone has first build disaster stories. I'm not overly confident that I'm going to produce an excellent speaker here, I just want to have fun. IDC how it looks; if this thing actually has a chance of sounding good I'll be plenty happy.

Why did you call it the Ocelot?

I've been screwing around with these drivers in PCD for a while now. Baffle step and diffraction discounted I was getting a +/-0.5db response up to about 12khz where the RS28 dips. Accuracy is my main concern rather than SPL. I was thinking of something that was small but powerful. Thus the Ocelot was born. Plus, it sounds cool.

 

[TheStalker]

Why didn't you just buy a prefabricated Dayton box from Parts Express? These things are dirt cheap, look great, and work very well for experimenting, etc. This one is plenty big enough for that midrange of a driver: Dayton Audio TW-0.38BK 0.38 ft³ 2-Way Cabinet Gloss Black | 302-710

It's only $85 and comes with magnetic grills and removable front baffle. You really can't beat that.

So someone reported this post and I got an infraction. What exactly did I say here that was insulting, other than give good feedback and advice? What's going on?

 

[Adam]

So someone reported this post and I got an infraction. What exactly did I say here that was insulting, other than give good feedback and advice? What's going on?

I'll admit that I find some of your posts confrontational, but I agree that post wasn't. It rubbed me the wrong way the first time that I read it, only because of your past posts - but after rereading it, I thought it was (as you said) just intended to be helpful. I don't think that it deserved an infraction.

 

[monkish54]

I'll admit that I find some of your posts confrontational, but I agree that post wasn't. It rubbed me the wrong way the first time that I read it, only because of your past posts - but after rereading it, I thought it was (as you said) just intended to be helpful. I don't think that it deserved an infraction.

+1.000000000000

More pictures have been added. Sorry about the quality, my phone was charging so I had to use my mom's.

 

[TheStalker]

Did you download Zaph's FRD files for the midwoofer? http://www.zaphaudio.com/contest-FRDfiles.zip

It will help greatly with the PCD.

You can also get yourself one of these: Dayton Audio EMM-6 Electret Measurement Microphone Allows For Accurate Acoustic Measurements At A Fraction Of The Price 390-801 (gate it at 10ms or less)
And this: Dayton Audio DATS Dayton Audio Test System | 390-806
LspCAD: http://www.ijdata.com/
And definitely I recommend the Unibox: UniBox - Unified Box Model for Loudspeaker Design - Kristian Ougaard
PCD and FRD are here: software
SPLTrace helps: FRD Consortium tools guide
Zaph Audio for amusement: Zaph|Audio
Mark K: Mark K's Speaker Pages
David Ralph: David Ralph's Speaker Pages - Home of the Windows Passive Crossover Designer (WinPCD)
Madisound for parts: Madisound Speaker Components: distributor of loudspeaker drivers and parts for speaker builders.
Parts Express for parts: Parts Express: the #1 source for audio, video & speaker building components
Parts Connexion for parts: Parts ConneXion - The authority on hi-fi DIY parts and components
Zalytron for parts: Zalytron
Speaker City for parts: Speaker City sells speakers, drivers, audiophile loud

Vifa/Peerless driver manufacturers: Tymphany
Scanspeak driver manufacturer: Scan-Speak
Hyquphon driver manufacturer: Hiquphon 1st natural choice in 3/4" soft dome tweeters - 20mm soft dome tweeter type OWI, OWII, OW3, OW4 .... and more. Designed and produced in Denmark since 1983.
Audio Technology driver manufacturer: www.audiotechnology.dk
RAAL driver manufacturer: RAAL - ADVANCED LOUDSPEAKERS
Seas driver manufacturer: Welcome to SEAS, THE ART OF SOUND PERFECTION BY SEAS
SB Acoustics driver manufacturer: www.sbacoustics.com

Custom cabinet builder: acoustic waveguides
Custom cabinet builder: Tyler Acoustics

Amazing speaker projects: http://www.troelsgravesen.dk/Diy_Loudspeaker_Projects.htm
More amazing speaker projects: http://www.audioexcite.com/
And our pal Dennis: http://murphyblaster.com/content.php?f=main.html

Hardware/Materials/Tools: McMaster-Carr
More hardware: http://www.grainger.com/

Tons of valuable information here: http://sound.westhost.com/

Electronics fun reading: http://www.humblehomemadehifi.com/Cap.html
Parts: www.newark.com
Parts: www.digikey.com
Parts: www.mouser.com
Parts: www.alliedelec.com

Now you have all the knowledge and tools to open a loudspeaker ID company.

 

[monkish54]

Did you download Zaph's FRD files for the midwoofer? http://www.zaphaudio.com/contest-FRDfiles.zip

I did, yes.

You can also get yourself one of these: Dayton Audio EMM-6 Electret Measurement Microphone Allows For Accurate Acoustic Measurements At A Fraction Of The Price 390-801 (gate it at 10ms or less)

I already have a mic.

UMIK-1 | MiniDSP

And this: Dayton Audio DATS Dayton Audio Test System | 390-806

Have.

LspCAD: Untitled

Have. 6.2 pro edition.

I recommend the Unibox: UniBox - Unified Box Model for Loudspeaker Design - Kristian Ougaard

Have. I typically use WinISD

PCD and FRD are here: software
SPLTrace helps: FRD Consortium tools guide

Have.

I also have Speak, Praxis, HOLMImpulse, REW, and the Martin King worksheets.

Zalytron for parts: Zalytron

Thanks

Speaker City for parts: Speaker City sells speakers, drivers, audiophile loud

Live within 5 miles.

Hardware/Materials/Tools: McMaster-Carr
More hardware: Grainger Industrial Supply - MRO Supplies, MRO Equipment, Tools & Solutions

Electronics fun reading: Humble Homemade Hifi
Parts: www.newark.com
Parts: www.digikey.com
Parts: www.mouser.com
Parts: www.alliedelec.com

Thanks.

 

[fuzz092888]

Is that UMIK direct from MiniDSP? If so I would be wary about using it for serious design. It will get you close, but has the potential to be off a few db here amd there, possibky affecting crossovers and other such things. IIRC, the last time I looked at any UMIK threads they were still complaining about that and some people were experiencing a rise and some a slight rolloff in the treble compared to an earthworks mic (at least I think it was). If its from CS no worries.

 

[monkish54]

Yes it is.

Well that's not good. I'll have to look into that.


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