Poor StonehengeI ???

[nazca]

Hi
I just have an old pair of Altec Stonehenge I in good condition but their sound is poor whithout bass, relief and rendement, I must push my Accuphase at 1/2 max level to have the same sound as JBL 4312 at 1 watt. Is tht is normal ? Coudl he be a demagn?tisation of Alnico or ferrite ?
Best regards
Philippe
France

<font color="#FFFFFF" size="1">[ December 11, 2007 02:52 AM: Message edited by: nazca ]</font>

[GM]

Greets!

Not familiar with the 4312, but the Altec should have a high efficincy 414-8B AlNiCo woofer, but with a cone tweeter the real world speaker efficiency is only around 90 dB/W/m according to these specs: http://www.lansingheritage.org/image...ome/page07.jpg

Considering their age though, the magnets may need re-zapping.

GM

[nazca]

Thinks for your answer
Please could you give me a solution to appreciate if the alnico is right or poor.
Best regard
Philippe

[gamalot]

I think if you have a question about the magnets being weak then the best solution is to remove the woofers and send them to Great Plains Audio for a check up and remagging.
If this is what you want to do then let us know and we will post the address.
Stonehenges are pretty nice speakers and should be sounding every bit as loud as your JBLs so something is deffinately wrong.
It could also be in the crossover networks so there is no exact answer to your problems unless you can have things checked locally.
It can all be repaired but I highly recommend you use the services of GPA to have it done right the first time.

Gary

[GM]

Interesting, I would have thought the JBLs would be higher efficiency. I wonder what the round trip cost from France to GPA would be though. Surely there's a competent prosound re-coner somewhere in Europe that can do whatever is needed to get them 'singing' again.

GM

[bfish]

Originally posted by GM:
...Surely there's a competent prosound re-coner somewhere in Europe...

<font size="2" face="Verdana, Helvetica, sans-serif">Phillipe, you might ask (or search) over on the Lansing Heritage forum, if you can sift through a few cranky Yanks, there are several knowledgable members there from Europe (and elsewhere) who might know where you can get good local service.

Measuring the magnet field strength requires a subsequent recone, even though remagnetizing one doesn't. Just make sure that's what you need, by eliminating the other possibilities first.

GPA can definitely remagnetize your drivers if you find no one local (for around $15 US each, plus shipping).

<font color="#FFFFFF" size="1">[ December 14, 2007 11:11 AM: Message edited by: bfish ]</font>

[GM]

Santana components?

[LICORNE]

La r?fection d'un haut-parleur ne se fait pas en 1 minute chez un r?parateur s?rieux. Il faut nettoyer le ch?ssis et la membrane, d?monter enti?rement l'?quipage mobile, remplacer syst?matiquement le spider, mettre un bord neuf, contr?ler la bobine, passer l'aimant a la sonde et ?ventuellement au banc de re magn?tisation.

Ces op?rations manuelle prennent du temps et on donc un co?t. Comparer au montage en s?rie des haut-parleurs neuf, il est tout ? fait possible qu'un haut-parleur r?par? revienne aussi cher qu'un neuf.

Je comprend parfaitement que la question du remplacement pur et simple puisse ?tre pos?e.

Si vous avez des haut-parleurs de haut de gamme chez un constructeur donn?, la question ne se pose m?me pas. Il n'y a qu'une r?ponse le remembranage, qui vous permet de repartir avec des haut-parleurs de caract?ristiques ?quivalentes pour un prix inf?rieur ? un haut-parleur de qualit? ?quivalente.


Si tu veux l'original GPA vend les remembranages
en kit.Cone Spider etc. (Colle excluse).

http://www.greatplainsaudio.com/

...........................

[bfish]

Originally posted by GM:
Santana components?

<font size="2" face="Verdana, Helvetica, sans-serif">Good save, thanks!

Having never owned either, I always seem to mix those two S's up.

[gamalot]

Guess I missed the France location and thought I saw Chamblee, Ga. LOL

You might also be correct about the JBL being more efficient but I do think the Stonhenge is a bit larger and should have every bit as much SPLs at similar volumes from the amp.
Something is certainly wrong based on his description and comparison of two fairly efficient systems.

Gary