Eminence Deltalite 2510 II Error assembly ?

[academia50]

The positive and negative terminals on these speakers Eminence Deltalite 2510 II are reversed. But the operation is correct, by Lorentz force. It is just different series or poor assembly? You opinions please? I claim for this or I can use it without problems ? 😱

Thanks ! 😉

 

[Enzo]

Regardless of how the terminal is labelled (by color here), as long as a positive voltage makes the cone move outwards, then whatever color terminal that might be is +.


I just looked at pictures in various catalogs, and unfortunately I see the red terminal on both left and right sides.

SO other than the battery test, I would call customer service at Eminence and ask them for clarification. COnsidering your location, perhaps email would be better. Then again I have no idea what international phone calls cost in today's world.

 

[academia50]

Appear to be changes according to the date of manufacture, I have 4 drivers and one with connecting terminals upside down ....

I will send mail to Eminence, thank you for your opinion !!!

Regards

Rolando

 

[JonSnell Electronic]

The battery test is the easiest option. 1.5v AA cell is plenty. Never test with a PP3 9v especially if your head is within a large cabinet, permanent ear damage can occur!

 

[academia50]

Hi all

Always use batteries 1.5 volts type A for test polarity this kind of speakers. In very delicate tweeters I can get to use AA. Anyone know what kind of winding carries this speaker?
A single layer, or two superimposed layers ?

 

[Enzo]

The common 9v battery cannot provide full voltage into the low impedance of a speaker voice coil, so when it is connected, its voltage drops to a small part of the original 9v. My 4 ohm bench speaker drops the 9v battery i have here to about 1.2v. The resulting sound is hardly a threat to my ears. In the shop, I use a 9v battery because it usually will touch both speaker terminals without having to tie up both hands with clip wires.

As for tweeters, it can be difficult to see the motion of many.

 

[nigelwright7557]

The battery test is the easiest option. 1.5v AA cell is plenty. Never test with a PP3 9v especially if your head is within a large cabinet, permanent ear damage can occur!

I always test with a PP3 battery !
I can see the cone move quite a bit with 9V. So long as its done briefly it is OK.

I love Fane speakers but they never have polarity markings on solder tags.

I just have to remember with rear facing speakers that I have to wire + and - the other way around from normal.

 

[academia50]

As for tweeters, it can be difficult to see the motion of many.

You're right here, it should be necessary to use a lens watchmaker. And I think not even seen the desplamiento so .....😀

 

[Enzo]

As an experiment, take a speaker you are familiar with, such as your stereo speaker. Play music through it and listen carefully. Now reverse the wires to the tweeter and listen to the same music. The "correct" way - the original hopefully, should sound better overall.

And with a pair of speakers, reverse the tweeter wiring to just one side only. Now the woofers and mids are in phase for both, but the tweets are not. Listen to the difference.

Woofers are the most obvious when out of phase, but you can often identify out of phase higher freq drivers by their sound.

 

[academia50]

Thank you all but I repeat that the twofer works perfectly .... what I finished be clear is because ...... Mechanically something must be reversed.
The voice coil perhaps? the polarity is correct, positive and negative terminals connected as indicated by both speakers do move the cone forward or backward accordingly ....

But ... then, what other "mechanically" ???

I do not know if I can explain well.

https://www.google.com/translate?u=...bina_4_capas.php&langpair=es|en&en=es&en=UTF8

 

[academia50]

I have written to support Eminence and after several emails back and forth, the issue has been clarified. Thanks Anthony ! 😉
The terminals have the correct polarity in the two speakers, but one corresponds to a (pre-2007) period when the neodymium magnet form magnetized, and this machine was later replaced by another that makes polarizing the reverse.
I remember having read somewhere that this has been standardized :
Place the speaker upside down and facing front terminals, the positive terminal must be the right one.


https://www.kjmagnetics.com/blog.asp?p=how-neodymium-magnets-are-made

All other components are the same, the coil, spider, cone, etc. The T / S parameters do not change at all. Or is that what worried me in my building

http://www.diyaudio.com/forums/multi-way/276238-dtqwtii-argentina.html


has been clarified and I can sleep peacefully. 🙂

Regards !

 

[dogshome]

Quickly connect and remove the battery to each speaker. Note the direction in which the cone moves. Connect each speaker to the amp with the + which makes the cone move forwards. Simples 😉

I am surprised the red and black terminals are left and right on your two units. Very confusing!

Test with the battery and connect according to which way the cone moves, the same way for each.

A "Friday Afternoon" assembly at the Eminence factory 😀


Oops, missed your last post. Sleep well

 

[nigelwright7557]

I bought 4 Eminence speakers about 10 years ago for a mobile disco.
They never were very loud or sounded very good.
I am wondering if phasing was my problem too.
My previous Fanes were much louder.