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JBL L80T Scroe with Pics and Questions

Ok, no ewave here.

Does anyone have the response curves for this speaker, or it's studio equivalent?
 
Zilch, you are the man!

Nice set of data on the 4410! I get the response curves (and the fact that dB are logarithmic) but I'm not sure what impedance curves mean to me, or most of the other graphs. Can you point me toward a primer on the subject, or give it to me "in a nutshell"
 
echase55 said:
Zilch, you are the man!

Nice set of data on the 4410! I get the response curves (and the fact that dB are logarithmic) but I'm not sure what impedance curves mean to me, or most of the other graphs. Can you point me toward a primer on the subject, or give it to me "in a nutshell"
Click to expand...

The 4, 8 or 16 ohm impedance ratings on speakers are nominal. An inductive coil (voice coil) is an active component with impedance changes relative to signal frequency. That curve showes the impedance of the speaker at a given frequency.
 
I understood what the curve was representing, but not what it means to me. How is this information applied?
 
echase55 said:
I understood what the curve was representing, but not what it means to me. How is this information applied?
Click to expand...

This will help you select an amplifier. Some very powerful amplifiers will drive a 2 ohm load, more will drive a 4 ohm load, almost all will drive an 8 or 16 ohm load. Some amplifiers have a Speaker A and a Speaker B channel. If you attempt to drive both channels at the same time with 4 - 4 ohm speakers, the amplifier had better be able to drive a 2 ohm load. You probably already know most of this.

Well, you can SOMETIMES get away with driving parallel speaker loads, based on the impedance curves. For instance, if you know that you will be playing music with very little low frequency content, chances are the total load that the amplifier is driving won't be as low as if you were playing something with a very heavy bassline. This is a very risky experiment, at best, and I totally discourage anyone from trying to "fudge" like this.

Finally, and somebody else (Zilch, GordonW, Avionics, etc.) can probably confirm or refute this, I believe that, in general, there is an inverse relationship between the impedance curve and speaker efficiency.
 
Ok... I couldn't wait 24 hours for the surrounds to "cure" they were under a fan for four hours, and seemed totally dry, so I plugged them in.

:jawdrop:OMG!:jawdrop:

:music:

:banana:​
 
I had a pair of L80T,s before i "upgraded" to the L100T's. The L100T's could go lower but i think the L80T's had a more musical bass to them. They arent no "cheap" JBL as the quality Basket on the woofer will attest. They are of course the home equivalent to the 4410. After listening to a friends 4412's....i wanted something similar and ended up with the L80T's. When driven with a decently powerful amplifier they sound dynamic and clean up through the volume range. Depending on the amp the titanium tweeters may sound harsh at higher volumes. Still a bargain and congrats :)
 
echase55 said:
Ok... I couldn't wait 24 hours for the surrounds to "cure" they were under a fan for four hours, and seemed totally dry, so I plugged them in.
Click to expand...

Excellent!

I was listening to my 4410s last night - just moved into a new house and finally got the turntable hooked up. Life is good, eh, echase55?

:thmbsp:
 
Life is good indeed! :yes:

My only trouble is now getting these properly positioned at my desk. They are a bit large for "computer speakers" :smoke:
 
echase55 said:
Life is good indeed! :yes:

My only trouble is now getting these properly positioned at my desk. They are a bit large for "computer speakers" :smoke:
Click to expand...

Right, that's what L20T3s are for. Or, 4401s. Or, both.

je

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Size is a problem. I've got a workbench behind my desk that I put them on, but they are so high I'm missing a lot of the mids while seated, which makes them a bit fatiguing. It seems the tweeters have wider dispersion than the mids, and they are about a foot above my ear level.

When I stand up they sound amazing.

I'd like to cant them down a bit, but won't risk a fall. I might have to try something else here.
 
echase55 said:
Size is a problem. I've got a workbench behind my desk that I put them on, but they are so high I'm missing a lot of the mids while seated, which makes them a bit fatiguing. It seems the tweeters have wider dispersion than the mids, and they are about a foot above my ear level.

When I stand up they sound amazing.

I'd like to cant them down a bit, but won't risk a fall. I might have to try something else here.
Click to expand...

Turn 'em over. My L110s are always upside-down, like the 4401s & L20T3s in the pic.

je
 
You can always un-staple the sorry plastic bottom plinth to make them real bookshelf speakers. I suspect you could always find a way to reattach it later, if you needed to.
 
Ok, here's a possibly silly question:

Is there a way I could filter the tweeters to roll off at around 19/20K? Preferably something I could wire inline (without touching the nice JBL crossovers) I swear I perceive higher frequencies, and it's just too much auditory information. I'd guess these are responding up to about 25K... or maybe I've just lost my marbles.
 
BMWCCA said:
You can always un-staple the sorry plastic bottom plinth to make them real bookshelf speakers. I suspect you could always find a way to reattach it later, if you needed to.
Click to expand...

They are rear-ported, so they will never be "real" bookshelf speakers. I have the original metal stands, so I will probably move them upstairs eventually once they are polished up to a decent WAF level.

In the meantime... :music:
 
You have not lost your marbles, the 035tia tweeters are very responsive. You are probably hearing more high frequency information than in the past. The Studio Monitor series incorporate an L-pad for both the tweeter and midrange. I saw a pair of the L pads on the auction site a couple of weeks ago. I don't know the exact part number offhand, but you can probably track a pair down and resolve your problem.
 
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