Which speaker tap are your using? 8 Ohm's? Have you tried to bi-wire using the different taps from the amps to the HF/LF section of the Arrays?
Which speaker tap are your using? 8 Ohm's? Have you tried to bi-wire using the different taps from the amps to the HF/LF section of the Arrays?
Hi
You have to use an active crossover for your MC275. The amp will run hotter and more inefficiently. There is no use to run a amp in fullrange when the 1400 array has a crossover freq at 750Hz from bass to M/T.
About the sensitivity on the amp you have to know the accual load impedance on each transducer. As I see it, you have 6ohm on bass and 4ohm on the high and 3ohm on the ultrahigh and you have to know how much power they can handle per transducer. You have allready a passive crossover on M/T what is the nominal impedance load on the high and ultrahigh??? Then the calculation can begin. You have to know this first.
About the harshness in your room you have to take some reverberation measurements to be able too see what is wrong here. Timc... has a point here. I don't think the harshness will go away if you put a tube amp.
I woulden't bi-amp these speakers, but that's me.
MC501 is enough for those speakers because the max recommended amp power is 300W at 8ohm.
Thanks
Tried different taps , 8ohms , 4ohms , 8 for horn and 4 for bass , 4 for horn and 8 for bass.
Both 8 ohms have bigger soundstage and more dynamics . Both 4ohms narrow the soundstage but more warm and airy . 8 for horn and 4 for for bass sounds funny . 4 for horn and 8 for bass sounds better , airy vocals with wider soundstage .
However , all the combinations still cannot get what I want
I would wote: no.
2213 + 2435HPL w/aquaplas + H9800 (Matsj edition)
Some suggestions based on my experience and initial frustration with the 1400 Array;
1. They need to be raised by about 5 inches off the floor.
2. Get rid of the standard spikes (if you're using them) and make some longer ones, or place blocks of dense timber under the standard spikes to get the speakers up to 5 inches.
3. Tilt the speakers back about 5deg from the horizontal
4. The LE14 needs at least 150 watts of good quality amp, my Krell KSA 150 seems to work well.
5. Horn/Tweeter needs at least 130 watts SS power.
6. Allow at least 300 hours break in - thats what mine have taken anyway. They now sound considerable different than they did at first !
Just my 2 cents worth, but may be helpful to you.
Cheers
'Nutz
Thats not a speaker ......*That's* a Speaker !
(With apologies to Michael J. "Crocodile" Dundee)
No kidding?? What kind of changes are you hearing?? Are they better now, well did the issue you had with them improve??6. Allow at least 300 hours break in - thats what mine have taken anyway. They now sound considerable different than they did at first !
Rob
"I could be arguing in my spare time"
For the first couple of months, I began to wonder what all the fuss was about with these. In fact, I'd almost given up on them and even had them listed on eBay. Luckily, they didn't sell.
At first they were very strident and harsh in the highs with a pronounced peak, exp on high freq female vocals. Also, the bass was dull and ill defined - no snap or musicality to it at all.
I thought it was my room - then I thought it was my amps - eventually I decided it was either my ears or the speakers themselves.
However, with the assistance of a couple of friends (thanks Woofer !) I persevered. Tried a multitude of amps, cables, speaker positions, preamps, etc etc until I really thought I'd go crazy ....
Other associates pointed out the high crossover point of the LE14 - an obvious flaw they stated. Yet others pointed to poor cabinet construction and the bass port etc etc
Knowing that JBL has more experience in speakers than almost anybody I could talk to, but also being aware that everything is built to a price and commercial reality is just that - reality, I still decided to keep going with them.
Boy, am I glad I did. At about the 300 hour mark, they finally started to come to life and now sound amazing. Its been nice to shove them in the faces of all the doubters, I must admit ...
I don't know if this is just my pair, or is symptomatic of the model, as I have not heard another pair.
However, I suspect that these may be one of those speakers that reward effort in all areas of setup.
I'll post some pics when I get the time
Cheers
'Nutz
Thats not a speaker ......*That's* a Speaker !
(With apologies to Michael J. "Crocodile" Dundee)
Yep! Everything 'nutz said.
Especially the bit about tilting them about 5 degrees. It works for most speaks.
You really don't want the throat of the horn hitting you fair square smack between the eyes.
Just that couple of degrees off axis, and preferably in the vertical axis makes all the difference.
Everything blends then....
Try it when all else fails.
I might be deaf, but I can still hear da bells! (Quasimodo)
.... Oh, and the Kick Drum.
No, not forgetting.
What you're trying to avoid is line of site straight down the throat.
That's where female vocals are the most active.
I might be deaf, but I can still hear da bells! (Quasimodo)
.... Oh, and the Kick Drum.
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