Array 1400 Clones

[audiomagnate]

it's better. It has a Be mid diaphragms instead of Al, and a CC crossover. Did you address the cabinet resonances (130 and 260 Hz) mentioned in the Stereophile review? How did you get the diaphragms treated? It looks like you went with a more conventional and much easier to build bass cabinet shape than the trapezoidal stock shape. Did you keep the internal volume the same and do you think the shape makes any difference?

I'm sorry for the barrage of questions, but I have become obsessed with the 1400s after hearing them at CES. I'm either going to sell a bunch of my equipment and buy a pair, or try to do what you have done. Lastly, have you had a chance to directly compare your "clones" to the stock 1400's? I bet your speakers sound absolutely terrific!

[JuniorJBL]

Hi Robh3306

It looks by the schematic that all driver are in phase. I ask because, in the 1400 array XO, the -3 and the 435 are out of phase with the system.

BTW I have almost finished my Be xo's.

[Robh3606]

Been a long time but if my memory is right they are all in phase, have to go look at the impulse response. I think they are in the 1400 Array as well.

Here is a short section of the review from Stereophile. Looking at the impulse they are all wired with the same acoustic phase. I forget if the LE-14H-3 is the JBL standard which would indeed have them reversed with respect too the upper drive units. Get a 1.5 volt battery and see what's what.

Rob

[JuniorJBL]

Thanks Rob.

Maybe I am talking electrically in phase, not sure. Am I reading the Schematic for the 1400 XO properly?

http://www.audioheritage.org/vbullet...l=1#post121868

Doesn't the w/blk stripe always go to the black terminal on JBL drivers? Maybe I am just confused! Highly probable.

[Robh3606]

Doesn't the w/blk stripe always go to the black terminal on JBL drivers? Maybe I am just confused! Highly probable.

No not always, also the schematics vary from acoustic polarity like the 1400 Array one to actual driver polarities. No consistency. Don't forget that JBL doctrine was opposite the industry standard so a +V on a +T equals a -CM. Not like everywhere else where a +V on a +T equals a +CM. That should clear things up.

V= Voltage T= Terminal CM= Cone Motion + Cone Motion means outward Away from the Frame

Don't worry we will get it done.

Rob

[JuniorJBL]

Thank You Rob!!

[Mr. Widget]

Here is a short section of the review from Stereophile.

I can't believe you would quote JA. To hear some on this forum speak, Stereophile is worth less than toilet paper.

That plot shows just how well "time aligned" these speakers are... (for those less technically inclined, the speaker is far from being "time aligned"... the tweeter is clearly far ahead of everybody else) funny how just a couple of decades back in the Dahlquist, Kef 105, B+W 801 days, everyone touted "time alignment" as being required for good imaging. Live and learn.


Sorry, I guess that was OT.

Thanks for the pointers Rob, if I ever go Be with my clones, I'll be scouring these threads!


Widget

[SEAWOLF97]

I can't believe you would quote JA. To hear some on this forum speak, Stereophile is worth less than toilet paper.

Widget

John is one of the few from that mag that deals in facts and doesn't act like a shill.

[Robh3606]

I can't believe you would quote JA. To hear some on this forum speak, Stereophile is worth less than toilet paper.

Hello Widget

To each their own. I respect his measurements, I think he does a good job and generally is pretty fair overall is his assessment of them. His measurements are the main reason I subscribe as at least you have both sides of the story so to speak.

Rob

[JeffW]

I think the winky smilie was a subtle nod towards JA/Stereophile. Widget wasn't saying he thought you believed Stereophile was toilet paper, just that a lot here do.

I took his post more as a jab towards the cult of the perfectly time aligned, and using JA's measurements as evidence that a good speaker can be something other than perfectly time aligned.

[Robh3606]

I think the winky smilie was a subtle nod towards JA/Stereophile. Widget wasn't saying he thought you believed Stereophile was toilet paper, just that a lot here do.

Hello Jeff

I got that and I agree on your second point.

Rob

[DavidF]

I can't believe you would quote JA. To hear some on this forum speak, Stereophile is worth less than toilet paper.

That plot shows just how well "time aligned" these speakers are... (for those less technically inclined, the speaker is far from being "time aligned"... the tweeter is clearly far ahead of everybody else) funny how just a couple of decades back in the Dahlquist, Kef 105, B+W 801 days, everyone touted "time alignment" as being required for good imaging. Live and learn.


Sorry, I guess that was OT.

Thanks for the pointers Rob, if I ever go Be with my clones, I'll be scouring these threads!


Widget

This is the same test article where JA states (confesses?) that he has been a fan of Greg Timbers since meeting him back circa 1981! Could'a knocked me over with a feather when I read that quote. I re-read the article the next morning after leaving the page open all night for a suitable break-in period... and I was still stunned.

[Titanium Dome]

This is the same test article where JA states (confesses?) that he has been a fan of Greg Timbers since meeting him back circa 1981! Could'a knocked me over with a feather when I read that quote. I re-read the article the next morning after leaving the page open all night for a suitable break-in period... and I was still stunned.

I can't imagine anyone who's met Greg Timbers not being a fan.

[Mr. Widget]

This is the same test article where JA states (confesses?) that he has been a fan of Greg Timbers since meeting him back circa 1981! Could'a knocked me over with a feather when I read that quote. I re-read the article the next morning after leaving the page open all night for a suitable break-in period... and I was still stunned.

A friend recently had some uber expensive caps put in an amp of his... he was told to really listen after 100 hours of break in.

I wonder, do magazines read better after 100 hours of break in.

Sorry, just feeling a bit testy today... I forgot to save a rather long and cumbersome document I had prepared and have been recreating it all day.

I personally have never met JA, but I do respect his knowledge and integrity... there are many others who are well published who leave me scratching my head. As to the comment about "time alignment"... back in the day I did it too. It most certainly will affect the sound and absolutely will allow a speaker to measure better, but damn if these time misfit horn systems don't sound pretty damned fine and many of the newer ones even image shockingly well. Must have more to do with early reflections and rooms than the phase/time issues.


Widget

[Mr. Widget]

I can't imagine anyone who's met Greg Timbers not being a fan.

What he said.


Widget