NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Hi ,
I just finished off a thread on a DIY 612 cabinet. I?m still unsure of building this 612 DIY enclosure.
Therefore I first want to try out an open baffle solution. I have an idea, need help to figure out if it will work.
I have made drawings for a open baffle solution for my Altec Duplex 604 E.
A couple of parameters that I want to keep, they are at least taken into account in this first suggestion:
1. the height on the front baffle is the same as on my hifi rack.
2. the width is on its max, because I want to put them in a certain place in my flat. but I do have two options on where to put them.
OK: after that?s said:
Since the height of the front baffle is fixed and it is a bit low, I think I will need to angel the front baffle - it is set to 6 degrees on the drawings.
Here are my questions I need help to figure out:
1. Will the front with the opening with round corners make any problems for the sound from the speaker elements ? - of course I can angle the front also, but then the front will be angled and not 90 degrees as I want to. The 90 degree front does also have a function, it keeps the whole construction standing, without beams on the back side of the construction.
2. My initial thought is to put the speakers quite near my hifi rack that stands agains a wall. then there will be free space on both outer sides of the speakers, but not in between - of course a little bit. - I need feedback on this placement , because if this is not a good solution then I can build a pair of open baffle speakers with open space on all sides standing freely in the room in front of a large window - but the last option is is not the optimal solution for me right now.
- tralalalala
http://imageshack.us/a/img339/5458/1openbaffle.th.jpg
http://imageshack.us/a/img600/7520/2...ideview.th.jpg
http://imageshack.us/a/img600/4996/3...ectivew.th.jpg
http://imageshack.us/a/img19/7425/4o...pective.th.jpg
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
The "tube kingdom" baffle as described in the following article would be a better place to start, IMHO.
JE Labs Arkiv: Open Baffle
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Quote:
Originally Posted by
omodo
The "tube kingdom" baffle as described in the following article would be a better place to start, IMHO.
JE Labs Arkiv: Open Baffle
Yep this is a much better design, your 612 open baffle concept is a great thought but OB's need more width.
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
thanks again for generous suggestions.
infact I have a pair of ESL57?s so since this open baffle design has the same dimensions as them this will suit me quite well :)
just have to drop my idea about making a hybrid front .. dropping this is maybe not such a dumb idea after all....
- tralalalala
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
I had a pair of GPA 604-IIIs in the JE Labs OB for a couple of years, and they sounded quite nice in them as an "interim" solution. However, they sound much, much, much nicer in proper big cabs.
It certainly is different (better) having the drivers at ear level vs shin level as they were in the OBs. The upper mids are definitely better - more detailed/articulated. Snare brushes are coming through with a lot more clarity and expression now. Much better control and imaging than the having them in the JE Labs OB.
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
I have not tried the JE Labs baffle with a 15", but with smaller baffles it has no bass, none. Just the harmonicas, no fundamentals.
In Dallas I showed a 605 on OB with an 18" helper sub. Worked great. For many tracks the 18 isn't even needed - but when it is, it makes a world of difference.
The speaker belonged to my friend John. I'll dig up a photo, if I can.
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
I'm with Pano. The Qts of the 604's is far too low for an open baffle arrangement without reinforcement.
I tried - then I cried.
Use a tuned box. It was designed for that. The 612 or variant is a good starting point
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Quote:
Originally Posted by
Panomaniac
Just the harmonicas
That's it? No other instruments or vocals? ;)
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Thanks people !
I?ve now decided what to do ... got my 604 E?s today.
I?ll make a DIY enclosure of the 612 C and Iconic cab.
the main reason is because I will not put money into a sub right now - have understood that people disagree on this subject about OB?s....
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Quote:
Originally Posted by
Cal Weldon
That's it? No other instruments or vocals? ;)
LOL! Yes, mouth harp was all that came thru!
(Thank you spell-check).
Tralalala, people disagree about a lot of audio stuff, it's par for the course. You can make the 604 or 605 work on a large open baffle, but you have to sacrifice efficiency to get the tonal balance right. The crossover is very important here - the woofer section has to be crossed much lower than normal to fight the rising response an OB give you. Done like that, it will mate up to the horn about where it should. A powered OB sub will help fill in the very bottom when needed. It's not hard to do.
You can see the 605s on OB in the first photo here:
http://www.hifizine.com/2010/06/lone-star-audio-fest/
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Yes, I bet that nice high Q woofer thrown in there makes all the difference in the world.
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Actually a very low Q woofer, Cal. It works great with the right crossover. High Q is the usual choice for OB, but it's all about trade-offs.
The active 18" does wonders when it's called on, for sure.
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Agreed OB's need supplemental bass and very large baffles to get any kind of bass response.. And the reason why almost all speakers come in some kind of enclosure IMHO.
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
I'm glad you have made a decision on which way your heading, Can't wait to watch your progress. I'm sorry if you feel as though I steered you onto a wrong path. I enjoy a much more open sound than what cabinets are capable of delivering....At least to me, Or maybe I just need it that way because I have become so deaf from cranking them beyond ear piercing and still having them be crystal clear. :)
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Quote:
Originally Posted by
cradeldorf
I'm glad you have made a decision on which way your heading, Can't wait to watch your progress. I'm sorry if you feel as though I steered you onto a wrong path. I enjoy a much more open sound than what cabinets are capable of delivering....At least to me, Or maybe I just need it that way because I have become so deaf from cranking them beyond ear piercing and still having them be crystal clear. :)
Cradeldorf : do not worry about that ... You just tried to help - just like other people on this forum.
I will follow up the other thread I have on this forum when I start building the cabs :)
Thanks !
- tralalalala
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
Funny, as I read that Lyle Lovett was singing "Ugly, ugly, ugly". :D
Re: NEWBIE: OPEN BAFFLE solution - for Altec Duplex 604 E.
A buddy stopped by the other day and had a listen, the first thing he said was there's no bass, I told him the sub does the bass now. After listening to them for another day I reluctantly concurred and stuffed them back into their cabs today. With the new sub and receiver It was much nicer sounding. Moral of the story, never listen to my thoughts because I'm more lost that you are. Carry on. :)
