You won't have bass impact. You will have a ton of bass information though. Very clear and correct. Impact requires, as you say, quite a bit more cone area and substantial impulse power. My Alpair 7's are just gorgeous sounding and I do not miss the bass impact, until I turn on the subs and realize ..... However, with just the informational bass, the speakers are musically satisfying.
Bud
Bud
The SDX7 is a great little performer, although not without some limitations, but if you're not sure about the direction you'd like to take for your next step, I'd definitely suggest waiting 'til you can gather your thoughts and the resources to afford the cost of more gear
great advice from a guy with at least 3 tube amps in various stages of "reconstruction", and at least 5 prs of unused speakers & 3 subs cluttering up my "man-cave" - which is definitely 10 times messier that your photos show 🙄
Haha, what is the limitations of SDX7? I know i wont play infrabass but i don't really need that. Just a little deeper bass than i got now and i'm fine. I just want more dynamics, headroom and the possibility to "crank it up" 😉 I got enough money to buy... Well, build some couples of EL70^2 with SDX7 but it's still money and you can't just spend it without thinking 😉 I want bang for the buck, i know i will get it this way but i want the most bang for the buck 😀
Still haven't finished the outside of my speakers. The top piece is still somewhat too big looking ugly that way. No paint, veneer or anything either 😉
before you develop one of the really nasty habits common to DIYers, try to finish one project before moving on to the next one(s)
but of course, see the last paragraph of my previous post - do as I say, son, not as I do... 🙄.
What I've found with the SDX7 and for that matter the CSS FR& WR125 - (all drivers with XBL motors and large phase plugs if that matters) is that when they reach limit of excursion they emit a noise that is best described as "flatulatory" - I haven't actually broken a pair - but it's not particularly pretty to hear
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Yes. But i'm not sure if i will go much further on the Mar-Kel70. Probably doing my rack before that. Still got to make a new sketch in sketchup some day... Maybe tomorrow?
I've heard people say it sounds like when you've eaten a little too much beans 😉
yes, but so far I've only got them (CSS drivers) to emit unfortunate sounds - Fostex FE127E, on the other hand ..... very distinctive aroma and mild light-show when the voice coils overheat -don't feed a full range driver 35V of DC rail
Haha 😉 So you mean that IF i happen to go a little too far it wont go up in smoke as a Fostex would? It would just sound terribly bad then it happens?
In this thread http://www.diyaudio.com/forums/planet-10-hifi/149196-welcome-planet10-hifi.html you say " you don't loss much with 2 closely spaced EL70 both firing forward". What do you lose with placing them that way?
Hope you guys won't mind if I tag two quick questions onto this thread. I'm planning on building an el70 stereo/sacd/ht system and was wondering if the Planet10 center and surround cab designs for the chr-70 will work for the el70? Also, would it pay to enable the center driver? Thank you.
Theory would have us losing HF definition due to combing. In practise it is not anywhere near that bad.
dave
Yes but the EL70 does not go as low sealed as the CHR70. It would also benefit from larger cabinets.
Yes, a centre would benefit from EnABL. If one speaker is EnABLed they all should be.
dave
Attachments
I believe that the idea is that multiple drivers reproducing the same sounds will all compete and the offset sound waves will all mash/blur together and make it sound worse. So what that image shows is that sound with a wavelength of 1.5x the distance between the drivers is all messed up and must therefore sound worse. By that image many bad things should be happening.
There should be phase cancellation, combing (peaks and dips in frequency response), and a general lack of imaging. Basically, it should sound bad, unbalanced, and you shouldn't be able to pinpoint sounds.
Sadly, we don't hear graphs and charts, and that diagram doesn't represent how our brain/ears work.
There should be phase cancellation, combing (peaks and dips in frequency response), and a general lack of imaging. Basically, it should sound bad, unbalanced, and you shouldn't be able to pinpoint sounds.
Sadly, we don't hear graphs and charts, and that diagram doesn't represent how our brain/ears work.
I'd take the alternate view that "fortunately" our brain is programed to decipher/extrapolate music, and that graphs and charts don't tell the entire story
Sarcasm is hard to tag with text. I too am glad that I don't hear charts, though it does make it more complicated to get better performance.
The good news is that it means that there is still more to research and improve.
The good news is that it means that there is still more to research and improve.
It would look like the speaker is on top of the cabinet.
Basically, ignore the diagram, it doesn't represent how we hear sound. It is also applicable for a single frequency only.
If that diagram is applicable to the distance between drivers, and not between the center of the drivers, in theory the frequency that would exhibit that problem in the twin EL70 floor standing speaker would be in the range of 20 KHz or higher. So I wouldn't worry about that either.
Basically, ignore the diagram, it doesn't represent how we hear sound. It is also applicable for a single frequency only.
If that diagram is applicable to the distance between drivers, and not between the center of the drivers, in theory the frequency that would exhibit that problem in the twin EL70 floor standing speaker would be in the range of 20 KHz or higher. So I wouldn't worry about that either.
The diagram is centre-to-centre spacing at a wavelength of 1.5x the spacing, gets worse at higher frequencies, better at lower frequencies & with fewer drivers. The eye sees bad things in a disgram like this, but the ear/brain expects this and compensates to a large extent. So despite theory & pictures that 2 "largish" drivers should have problems when both a front firing, in actuallity ist is not.
This was driven home by a pair of Twin EL70 (stock), in a simple BR using the 1 ft^3 PE curved boxes. Even with far from optimal spacing they sounded fine. Close spacing (and EnABLed drivers) make it moot. Hence a number of Twin's now designed.
dave
This was driven home by a pair of Twin EL70 (stock), in a simple BR using the 1 ft^3 PE curved boxes. Even with far from optimal spacing they sounded fine. Close spacing (and EnABLed drivers) make it moot. Hence a number of Twin's now designed.
dave