JBL 4312SE - 70th Anniversary speakers ...

I'd love to hear a MC275 VI on mine :)


jdandy said:
Joe.......The JBL spec sheet on my 4312A's show a sensitivity of 91dB/1-watt/1-meter. The JBL 4312SE 70th Anniversary spec sheet shows a 90dB/1-watt/1-meter sensitivity. Both speakers are quite tube amp friendly.
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joeinid said:
I'd love to hear a MC275 VI on mine :)
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Do it.

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joeinid said:
Hi Dan,

Those look nice but I need the height in this room with the JBLs. These feel really efficient and I'm so curious what a decent, modestly powered tube amp will sound like on them.
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Joe.......Right now I have my JBL 4312A's on Bell'O speaker stands in the studio control room on either side of my Roland Fantom X6 keyboard. The JBL's work real well on stands like this, too.


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I’ll check those out. I’ll need to see how tall they are and how sturdy. I’m using my stands from my old Harbeth 40.1 that I used to own. I added a tile on top with an isolation pad underneath. Height is perfect and I don’t notice any issues but a more dedicated solution might be nice.
 
Those look interesting too. Hmmmm. I’ll have to measure what my speaker height is now and look for a stand close to what I like.
 
Joe

Just from looking around it appears that Harbeth 40.x stands are around 14 inches high so one of the 13 inch stands plus the Iso-Acoustics Iso-Pods would put you in the "sweet spot" and hold the speakers firm plus add extra isolation. For the "big" 4367's a variation of Dan's plans would seem to work but just twice as wide.
 
The stands that I have are probably a little higher. Total height now with the tile and isolation pad brings the bottom of the speakers up to 21”. I really like this setup. Having a dedicated one piece stand around this height would be perfect, I think.
 
Hello, do you still have your JBL 4312se’s? I just purchased a pair from Music Direct to add to my stable to be used with my line magnetic 219ia amp and LSA integrated. Just got them, I have some questions. They sound a little confused and mushy, does that change with break in? Also any setup tips?
Thank you
Stephen
 
Hello Joe, I just purchased a new pair of JBL 4312se’s from Music Direct. The question I have is right now they sound confused and a little loose and mushy. Will that change during break in? What other changes occur and any set up tips. I am using two amps with them, a line magnetic 219ia and an LSA Signature both integrated amps.
Thank you
Stephen
 
Welcome to the forum Stephen, thank you for joining.

Congratulations on the 4312SE. I still have and love mine. What stands are you using? I have mine about 3-4 feet from the front wall, slightly toed in and the bass/treble controls centered. I never thought they were mushy. I like the 12" woofer and think it's pretty good.

With more break in they sounded a little smother and more coherent to me.

Spr123 said:
Hello, do you still have your JBL 4312se’s? I just purchased a pair from Music Direct to add to my stable to be used with my line magnetic 219ia amp and LSA integrated. Just got them, I have some questions. They sound a little confused and mushy, does that change with break in? Also any setup tips?
Thank you
Stephen
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Spr123 said:
Hello Joe, I just purchased a new pair of JBL 4312se’s from Music Direct. The question I have is right now they sound confused and a little loose and mushy. Will that change during break in? What other changes occur and any set up tips. I am using two amps with them, a line magnetic 219ia and an LSA Signature both integrated amps.
Thank you
Stephen
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I am using the 13” VIT center channel, they work very well. They are also raked back a little bit.
 
Stephen,

Please don’t forget that the LM219ia is barely 24wpc. If I remember correctly the 4312SE are 90dB at 6 ohms. Not totally inefficient but not what I would consider optimal for that amp. I had that integrated on more efficient speakers and thought it wasn’t enough. I’m not a volume head but even for me, the LM219 couldn’t cut it. I would’ve needed much more efficient speakers to make the LM sing.
 
I have a small room and I can crank it pretty good with the JBL’s with only using a few watts. The 219ia is a monster amp and sounds much more powerful than its 24 Watts. I also have an LSA Signature integrated amp and I think the JBL’s like tubes better. I have some Zu’s and some new Heresy’s also. The 219ia with the Heresy’s is pure magic.
 
Joe, you are absolutely right. The more I listened the more I found that the JBL’s didn’t play well with the LM 219ia tube amp, not until I put my LSA Signature 150 watt hybrid integrated with the JBL’s did they come alive. I was very disappointed in them till I switched amps, and what a transformation. They are great speakers.
 
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