i just knew u were gonna wake up on that one!
well when i said:i didnt mean good!everything i did with em sounded the same
i just knew u were gonna wake up on that one!
well when i said:i didnt mean good!everything i did with em sounded the same
Geez, that never happens when I play my JBL's - you're a lucky guy.....hmm....must be Swedish girls too....then the girls in the quire came in and started off!
But seriously, does it happen with vinyl AND CD? If it's vinyl only, then it could be acoustic feedback through your turntable.
Last edited by Chas; 07-29-2004 at 11:28 AM.
lo chas!
well in this case and all others so far is on cd...the vinyl simply rock´n roll!
soon u can see both my cd-player and cd:s on ebay!
well u gotta check the phase on the drivers and then move em around a day or two...then it just happens!that never happens when I play my JBL's - you're a lucky guy
it did infact show up a swedish girl too! asking questions about my fine placement of the speakers!
this was not on CD it turned out she was the girlfriend!
Last edited by Figge; 07-29-2004 at 11:39 AM.
Something seems very wrong here. Switching polarity of the drivers will yield a fairly subtle change. You are not going to get a huge 1KHz peak by switching the driver polarity. A small 1KHz bump will give the speakers a honky horn like quality. If your issue is very pronounced as you have said I would assume you have a significant problem. You need to go about this methodically changing one thing at a time. Have you listened to both speakers independently? Have you tried switching left and right speakers? Have you tried changing your electronics. Could you have a defective amp or preamp?Originally posted by Figge
well not exactly...but the freq around there is how should i put it very.....intense would be a better word! even at pretty low volumes...almost as if there was a phase problem between the woofs and horns?? my first guess was someting like the crossovers but...those horns shure loads up the room...could be some reflections also.
otherwise theyre now very smooth...compared to when placed in the corners.
Widget
ok listned to them separately. slight honking in one ch (i cant mono) but girls sounded very fine
electronics: well ive changed da amp from a quad 405 to a 405mk2
preamp i dont have at the moment. doing some business with HP to get his sony TAE86B. shure it will be fine. right now i use a thing i built in school
cd is a denon dual dj cd....wich is a suspect in this case!
Last edited by Figge; 07-29-2004 at 12:50 PM.
i tried moving em out about 2m in the room. and shit! what an improvement! suddenly there´s new instruments playning! never heard before....cool! bass is crystal clear. the problem i had when starting this thread is gone shure some crappy recording still sounds like crap...but good crap, no brainfrying treble anymore!
however theres something funny going on around 1khz. i belive this would be the crossover? bi-amping maybe will solve this?
Figge,
I tend to agree with The Widget.
Suggest you play a well known classical recording with good production values, even the Chesky audiophile demonstration disk. You will find it hard to assess subjectively whats going on otherwise.
Moving the enclosures back and forth from the rear wall will alter the sound significantly but you may be trading one problem for another.
The 1 khertz anomally could be a reflection from the near field object in your room causing a peak The 4430 should well clear of any objects in the room at least a metre due to the wide off axis reverberant response (power response).
Do you have a PC with a Sound Card? If you have buy your self a Beringer microphone and starting doing some measurements by down loading RTA analyser which will allow you to measure the response at the listening position.
Do a search on on the forums for Spectra Plus. Bo has played around with this thing a fair bit.
Ian
Are you sure that the crossovers are the correct one's!
They have built in EQ for the 2344 horn. Without this EQ, the horn tends to have a peak between 1 & 2 KHZ. I had a pair of these horns with 2426's and the peak definitely bothered my ears!! I bought a JBL 5234A electronic crossover and the correct cards for the 4430 and noticed a huge difference.
I still have the crossover and cards if you are interested.
Originally posted by Ian Mackenzie
The 1 khertz anomally could be a reflection from the near field object in your room causing a peak The 4430 should well clear of any objects in the room at least a metre due to the wide off axis reverberant response (power response).
Do you have a PC with a Sound Card? If you have buy your self a Beringer microphone and starting doing some measurements by down loading RTA analyser which will allow you to measure the response at the listening position.
Do a search on on the forums for Spectra Plus. Bo has played around with this thing a fair bit.
Ian
1. probably is some funny reflection making the bump!
paul: i believe its the right xovers. but what do i know?
my first thought was that it was some funny in the xoverfrequency and bi-amping would solve it...i dunno. do u have he 4430/35 cards in it?
2. yes i have a laptop located on the livingroomtable...how practical!
3. allready d/l:ed the spectra plus
just the mic is missing! i guess borrowing a "allround" mic from my buddies studio is out of the question?
when bi amping these speakers: is the eq in the crossover still available? or is it bypassed?
oh! i swaped places on the speakers so that the horns are "out" then the honking went down pretty much...still a little left sometimes. but since the room aint a studio i guess i have come up to pretty good results.
also gonna try another cd player.
Last edited by Figge; 07-30-2004 at 03:29 AM.
The horn Eq is intregral, the active crossover feeds the woofers directly as I recall and the horn via a 20 uf capacitor which forms parts of the crossover function.
Giskard is the Guru on that one, he has owned th 4430.
Ian
Hey Figge, if you have had the HF diaphragms removed from their drivers, this might be causing your troubles. When re-installing the diaphragms, it is necessary to sweep a range of frequencies at a specific voltage level per JBL specifications.
This is done to insure the voice coil is properly aligned and true in the gap. Otherwise a resonance is possible at various frequncies due to intereference with the motor assembly. Did you remove the diaphragms? I seem to recall that you posted some photos of them.
yepp i removed em..
i had something like this in mind when puting them back...
but there where 2 pins to "steer" it right when i put them back.
once on the pins it was "almost" solid, couldnt movit! sideways that is. well ok! very very very little....
very nice precision!, compared to when i was changing the tweeters on my infinity sm-120:s u had to center the coil by feeling that it didnt rub! crap!
Last edited by Figge; 07-30-2004 at 05:53 AM.
Figge,
Does your CD player have digital out?
If so consider the Apogee Mini DAC, Apogee is the world leader in D/A converters.
http://www.apogeedigital.com/products/minidac.php
I will be considering this unit for my own use at some stage.
Ian
[QUOTE]Originally posted by Figge
[B]1. probably is some funny reflection making the bump!
paul: i believe its the right xovers. but what do i know?
my first thought was that it was some funny in the xoverfrequency and bi-amping would solve it...i dunno. do u have he 4430/35 cards in it?
Yes, the cards are for the 4430/35. The only problem I had with the 5234A is that it was set up for hard wiring. I put some female RCA terminals on it but still had a grounding problem. As suggested by a JBL Tech, I ran a ground wire connecting all my components together and the noise went away.
You can have the crossover & Cards for $50 + shipping if you want it. But it sounds like this will not solve your problem.
Hi again Figge,
It seems like this could be the problem. Despite the fact that the locating pins create a tight, snug fit, there is still alignment required as the screws are tightened down. You need an AF oscillator (signal generator) connected to a power amp and the driver.
Perhaps someone here (Giskard, maybe) could tell us what the sweep frquency range and voltage level is that needs to be applied to the driver terminals.
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