DaveCan said:
The system we're currently working on uses the pair of TD10S's, the new 6.5" mid and the small RAAL ribbon. This will likely get turned into a kit with plans available at least for the active system with DCX2496. We'll be doing some MTM's with the 6.5" midbass and a yet to be named tweeter as well. One thing we're experimenting with is a 6.5" waveguide to work with the 6.5" midbass drivers.
lbstyling said:
There are still many more things than just looking at the motor. Looking at impedance curves and CSD plots will tell you if there are physical resonance issues. We looked at quite a few before designing our 6.5" mid. B&C, Beyma, 18sound, PHL, etc. We found all of them to have issues with dustcap or cone breakup. The ones with higher inductance had other issues as well. There really is not single thing you can look at to determine which driver is best. You really need to evaluate each aspect.
For your room size you may want to look at the system we're doing currently for Nick Barnett. His room is approximately 7.5m x 11m deep and 3.5m tall ceiling. The system uses a pair of TD10M's, the 6.5" mid, and RAAL ribbon tweeter. This will be a system in the mid 90's at 1W across the board that is capable of quite high output levels approaching 120dB at 1m. If this is not enough for you, you'll then want to look into something like I posted with the pair of TD15M's and a compression driver on a large horn/waveguide. Very high power handling and output capability.
John
Re: Re: high effency speakers choices
Tinitus
I think that the quality issues have been resolved, it was only the first kit that had a problem. I think that my speakers are ideally suited to the query here.
tinitus said:
Tinitus
I think that the quality issues have been resolved, it was only the first kit that had a problem. I think that my speakers are ideally suited to the query here.
Dude - You're in Bath - get thee to Dorest! A mere 55 miles hense.
Go there - get these.
http://www.p-audio.co.uk/products/db_product_1_6_bm-18cx38.htm
In a big box or on open baffle. Both work. Both will rock your world. And they sound great, too. Super dynamic, very detailed, never congested, deep and wide imaging.
http://www.michaelmardis.com/speaker/BB-1.htm
Go there - get these.
http://www.p-audio.co.uk/products/db_product_1_6_bm-18cx38.htm
In a big box or on open baffle. Both work. Both will rock your world. And they sound great, too. Super dynamic, very detailed, never congested, deep and wide imaging.
http://www.michaelmardis.com/speaker/BB-1.htm
realy? panomaniac- they would be cheap thats for sure-open baffle would be fine if they realy shined-i wouldnt care.-i might look into this further-thankyou.
i heard some atc's today -very very nice-more like this please!! as the website says -very heavily damped-huge magnets, there awsome and most importantly-fast!
anyone know of some designs using these drivers?
john-thankyou for your reply and information-but how do i hear some-to know what i make of them??
i heard some atc's today -very very nice-more like this please!! as the website says -very heavily damped-huge magnets, there awsome and most importantly-fast!
anyone know of some designs using these drivers?
john-thankyou for your reply and information-but how do i hear some-to know what i make of them??
Hardly high efficiency though.lbstyling said:
I have heard them a couple of years back (12" 3 way) and was not hugely impressed.
Those OB's look impressive! However, those of us with "spousal constraints" would have a hard time getting something so large into the living room.
Oh, for a dedicated listening room--
Don
Oh, for a dedicated listening room--
Don
You ain't kiddin', D-Man! Need a basement to convert.
And the boxes are even bigger - huge. Here's a photo from Common Sense Audio.
(48T x 24W x 24D)
Hearing a drum solo on these is like the real thing. I've miked enough drum sets to know most speeakers don't get close.
BTW, about 99dB @ 2.83V. You could run them with your Virtue amp, Don. 😉
And the boxes are even bigger - huge. Here's a photo from Common Sense Audio.
(48T x 24W x 24D)
Hearing a drum solo on these is like the real thing. I've miked enough drum sets to know most speeakers don't get close.
BTW, about 99dB @ 2.83V. You could run them with your Virtue amp, Don. 😉
panomaniac said:You ain't kiddin', D-Man! Need a basement to convert.
And the boxes are even bigger - huge. Here's a photo from Common Sense Audio.
(48T x 24W x 24D)
Hearing a drum solo on these is like the real thing. I've miked enough drum sets to know most speeakers don't get close.
BTW, about 99dB @ 2.83V. You could run them with your Virtue amp, Don. 😉
That's what happens to my wood sometimes in an unheated storage. Still sometimes ya gotta use what materials are available eh! ? 😱
Seriously though, I would love to have a pair of those 18" BM-18CX38 to play with on low power SET.
panomaniac- those things are mad!- im sure there very dynamic-but i just cant see that giant cone being particularly responsive for the attack i need-
anyone used audax drivers?ive heard these are suppost to be fast and have good instrument separation??
anyone used audax drivers?ive heard these are suppost to be fast and have good instrument separation??
Don't make assumptions, as it is not true. In my case I am referring to the 15CX38 which on a quick test has a lot of potential. More tests and measurements will be forthcoming after the current batch of projects are completed.lbstyling said:
Which ones? They make a lot of drivers but typically are low efficiency.lbstyling said:
Just a quick question for those with knowledge on the subject out there..
Is there anything to gain by loading a 1" compression driver crossed at 1khz in a 340hz horn?
Is there anything to gain by loading a 1" compression driver crossed at 1khz in a 340hz horn?
lbstyling said:
For my guitar amp I use 4 off 10 inch full range speakers and that gives laods of bite for rock music.
Defo said:
No. Loading by a horn is a grossly over-rated concept. Loading of all horns and waveguides is approximately the same and the priciple function of them is directivity control. A large device will control directivity to a lower frequency and hence will tend to "load" better. But since you only intend to use it down to 1 kHz loading below this is not relavent.
gedlee said:
Directivity controll AND sensitivity gain, right? How come there are many 1" horns loading below at least 500hz when most 1" compression drivers dont go below 1 khz?
Stereo Lab 250, and Azura 340 are two examples.
I am as baffled by that as you are.
Since the concept of "loading" is not very revealing of a devices performance, I guess that they can claim whatever they want.
With Compression drivers, sensitivity is already very high and in a home situation the sensitivity gain is nice but hardly a necessary parameter. Directivity control is critical - maybe the most important design criteria for a loudspeaker system. So, to me, waveguides are all about directivity and not much else.
Since the concept of "loading" is not very revealing of a devices performance, I guess that they can claim whatever they want.
With Compression drivers, sensitivity is already very high and in a home situation the sensitivity gain is nice but hardly a necessary parameter. Directivity control is critical - maybe the most important design criteria for a loudspeaker system. So, to me, waveguides are all about directivity and not much else.
lbstyling said:
Oh, they are. They are. Opening cut of the CD "Oh Brother Were Art Tho?" The chain gang. The hammer blows will knock you over. And as quick and dry as you could want - like hammer hitting stone - outside. I've heard it done better (once) - but never as big and dynamic.
Defo said:
So that the response is "well behaved" below the crossover point. An octave is good. If you're using 4th order filters maybe you won't need it.
panomaniac said:
Having a low "cutoff frequency" is hardly any guarantee of the system being "well behaved". In fact, I would suggest that it has nothing to do with the problem. The LF response of a horn driver combination will be dominated by the drivers response, not the waveguide. And there is nothing wrong with moving the "cut-off" up to the crossover point as this then simply becomes part of the HP filter. Its the acoustic response that matters not the electrical.
I prefer the "cutoff" (even though I disdain that concept) to be rght at the crossover thereby assisting the electrical HP filter.
Defo said:
I didnt know there were
I only know a few
Actually I think most wont even reach down to 1khz
As fore the Azura you mentioned, I plan to use AH-550 with a 1.4" CD, and maybe cross to a 12" around 800hz, if all goes as planned
panomaniac- i have a rather large paradigm servo 15 that has a separate box for crossing over the bass to it -this is suppost to be a fast/dry sound to the extreme by many standards-i dont find it that kind of fast- what makes yours so different?
the audax carbon cone 6.5" with a pair of carbon 10" in a tl would be interesting?
the audax carbon cone 6.5" with a pair of carbon 10" in a tl would be interesting?
- Status
- Not open for further replies.