Based on the work that our pal Grumpy started a while back, we are considering replacing the FAQ in the Menu Bar above with a custom entry that features these topics and any others that people suggest and we moderators feel add benefit without making the list so long that it ceases to be a useful tool.

Many of the links below are broken and I don't have time to fix them right now. To follow the links you can use Grumpy's original submission.

So, please look this over and add any additional subjects or ideas you have.


Draft FAQ 1.2 (inserted a few more bits, still needs work)


Q: How do I use the forum?
A: The mechanics for setting up and getting around are found here:

Q: Are there rules for using the forum?

Q: How is this site moderated?

Looking for information

Q: What is this (fill in the blank)? ...which might more appropriately be...
Where can I find info on (fill in the blank)?
A: Have you looked in the Library? It can be awkward to search through,
but many items are there, old and new.
A: " " " " " Technical Reference Section?
A: Is it Lansing (JBL or old-Altec) related? if not, you might ask here (and might
get a knowledgable answer), but there are generic audio forums elsewhere.
A: Upload some pictures... someone might recognize your "find"

Q: Effective search techniques?

Q: Physical Enclosure information? (view and contribute):

Q: Serial Number information? (mostly contribute)
A: A member-run registry is here:


Q: How much is (fill in the blank) worth?
A: Ebay can be a good indicator of current monetary value. This site is not
a replacement for doing your homework and knowing your market. Responses
you may receive are opinion only, but may be based on some level of
experience (don't get too disappointed or excited prematurely).

Q: I'm selling or buying some large speakers, how should they be packed to
reduce the chance of damage?
A: A multi-member contributed thread on the topic:
A: Another example of a well packed low-frequency transducer:

Q: I have stuff for sale, who wants to buy it?
A: Specify a price or "make me an offer" and ask for responses via PM
(expect low offers)
State if/when sold or no longer for sale (for whatever reason).
Don't "threaten" to put it on Ebay... just do it.



Q: My JBL (fill in the blank) is broken... where can I get it fixed?
A: Naturally, at your local JBL Authorized Service Center ... or failing that,
feel free to ask for recommendations here. Try to describe the issue fully.

Q: My Altec (fill in the blank is broken... where can I get it fixed?
A: Aside from the Unofficial Altec Lansing web site for references,
you -might- actually try Altec
or Great Plains Audio
or ???

Q: Should I recone or refoam?
A: Probably. If you can't tell, perhaps someone may respond with a referral
to a local professional. If the surround is shot, it is quite possible that
the the voice coil suspension (spider) is following suit. Reconing is always
preferred (and recommended by JBL) unless the recone kit is No Longer
Available (NLA).
A: The following is a member-contributed step-by-step photo and caption
thread for resurrounding a JBL low-frequency transducer:

Q: Where can I buy a recone or refoam kit?
A: Recone kits from the factory are only available to authorized service centers.
From there, it's up to the servicer to uphold his agreement with JBL to not supply
an un-authorized person with a recone kit, or risk losing his service account.
A: Refoams are not factory recommended, but there are a number of vendors that
sell "kits" with instructions. A forum search should turn up several.

Q: I have a set of speaker drivers, can you help me design a speaker system?
A: Do some homework, put your ideas out there... you'll no doubt get opinions
along with some useful information. It's up to you to sort it out.

Q: Should I modify my crossover?
A: Is it broken? Might you be better off with a different system?
There are some documented success stories within. Use the search function.

Q: What (fill in the blank) are best?
A: The one's you installed in your modified (fill in the blank).

Q: My JBL or Altec-Lansing computer speakers are not working
A: Unfortunately, such equipment is outside the scope and intent of this site.



Wood/Vinyl (e.g., tung oil & turpentine, Howards Feed&Wax, Watco, ...)
Cloth/Foam (e.g., JBL Studio Monitor Blue, L100 quadrille foam, ...)
Paint (e.g., matching JBL Studio Monitor Blue)
Driver coatings (e.g., whitening Aquaplas)

If possible, download and check the Owner's Manual for cleaning guides


Replacement Parts

Q. Where can I buy/get:

Grille cloth, Speaker surrounds, Cone assemblies, Diaphragms, Foilcals,
Knobs, Lansaloy, Goop (aeroflex?), Crossover parts, Nameplates, etc...

A: There is the obvious: (product support)
Then there's the not necessarily as obvious:
Member supplied materials/services/recommendations
(e.g., Grille cloth, sources for speaker surrounds, foam grilles, foilcals ...
some being reproduction, some "recycled", some old stash)
Ebay, Craigslist, ...



Fiscal: (see the Donate button)


Posting: Please try to post in an area that makes sense, try to maintain a
modicum of willpower before posting hastily and unecessarily.

Efforts: Hosts, organizers, moderators, group projects, ...



Suggested Reference Material

Theile/Small Parameter Definitions

Measuring T/S parameters

(pointer to CLIO thread(s))

(pointer to RTA thread(s))