Array 1400 Clones

[cooky1257]

Congrats-you got there in the end.
Looking good too.
Cooky

[Robh3606]

Thanks!

Hello Heather

That carts not finished need to add a skirt to cover the front wheels and paint it.

Hello Junior JBL

Thats a vinyl laminate. Same stuff I used to cover the SAM's.

Hello T Dome

Nice score today

Hello Cooky

What's up with yours? You should be done as well.

Rob

[grumpy]

Ah, time to relax and listen . Nice job Rob.

[Chas]

Very nice Rob. Tell us more about the sound qualities versus your 4344 and 250 projects, please.

[Mr. Widget]

Very nice Rob.

Yeah... what he said.


Widget

[Krunchy]

Hi Rob,
I see you have been busy lately, they look incredible and knowing you I am sure they sound better than they look. Congratulations! Very nice job

[4313B]

They look really nice Rob! You did a killer job on those networks.

I like those rounded corners...

[yggdrasil]

Yeah, very nice indeed.

Great cabinet job and impressing network job!

[Robh3606]

Thanks guys!

Tell us more about the sound qualities versus your 4344 and 250 projects, please.

Hello Chas

Well simply they sound better. As much as I like the 4344's the 1400's are more open sounding, have more depth and finesse. They are also very uniform through out the room and with the right material can surprise you. As far as differences to the Jubilees well I don't have enough time with them to say what they are yet.

Ah, time to relax and listen .

That is a great idea.

Rob

[Duffinator]

Hi Rob those came out great. Any update on your thoughts on how they sound compared to your other speaker builds?

[Robh3606]

Thanks! Well after living with them for a while now not much has changed. They are still the favorites. They image better, sound more natural and relaxed and vocals are just plain amazing. Don't get me wrong the other systems still sound good just not as good as these do. I won't be getting rid of the other builds.

Rob

[audiomagnate]

Is the efficiency the same as the 1400s, i.e. 89 dB?

[Robh3606]

Hello audiomagnate

Is the efficiency the same as the 1400s, i.e. 89 dB?

Yes I had to add additional padding to drop the horn and 045be sensitivity. It took a bit longer than I thought it would though. Ended up doing 1/2 db steps until it sounded right. Did the last bit by ear as I couldn't get repeatable resolution below 800Hz I felt comfortable with using my in-room measurements.

Rob

[audiomagnate]

Did you start with a stock SAM1HF and change the diaphragms to beryllium, which produced a more efficient driver, which necessitated more padding in the crossover? Or is your woofer module just less efficient than the stock 1400? Also, are you using a CC crossover?

[Robh3606]

Did you start with a stock SAM1HF and change the diaphragms to beryllium, which produced a more efficient driver, which necessitated more padding in the crossover? Or is your woofer module just less efficient than the stock 1400? Also, are you using a CC crossover?

Hello Audiomagnate

No I scratch built the enclosures and started with raw drivers. I purchased the 045Be's, horns and LE-14H-3 from JBL through member 4313B. I got the 2435's from Ebay and had the diaphrams Aquplased to make them "equivilent" to the 435Be.

The Berylium drivers are more efficient than their aluminum and Ti brothers so that is where the padding changes comes from. There is also a difference between the 435Be vs the AL where you get more output at the end of the drivers passband with the berylium. I ended up having to change the pole on one side of the crossover to get the "correct" on axis response using the JBL measurements as a guideline.

The woofer module is in a bigger overall volume but that does not effect the midband efficiency so the two have the same sensitivity at the crossover point.

There is a posted schematic in the middle of the thread and yes they are CC networks on the 2435 and the 045Be. I didn't use CC network for the caps in the woofers network or the impeadence correction zobel?? not sure what to call it. I used bypass caps or multiple values instead.

If you are interested here are the link to the seperate threads for the SAM and LF Module.

Bass Module http://www.audioheritage.org/vbullet...l-Bass-Modules

SAM1HF Modules http://www.audioheritage.org/vbullet...-SAM1HF-Clones


Rob