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Speakers ACTIVE PROJECTS Audio Restoration Crossovers PROJECTS

JBL XTI Speakers Repair & Restoration

The latest update on the JBL XTI speakers: I’ve managed to repair the metal domed tweeters as best as possible as sourcing diaphragms or replacements was very expensive! The two main JBL XTI 60 front speakers are finished (pictures to follow)

The centre channel has been repaired fully and sounds great!

I messed up centering the voice coil on one of the 6″ mids so I need to order another surround and do a better job!

Unfortunately the inner and outer dimensions of the foam replacements I ordered are a little too large for the A2106A-L 6″ Speaker which you can clearly see in the pictures below, Sending them back for replacements.

Some of the Surrounds fit nicely and i manged to get the JBL XTI 40 towers fully repaired (pics to follow)


There is also quite alot of attention needed on the cabinets, Although all five XTI speakers are in cosmeticaly in great condition there are alot of surface scratches all over the enclosures that need attention, I also had the thought of taking them from the original satin to a French polished finish.


I havent had time to inspect all of the crossovers yet but i know one has a possible intermitant fault on one of the JBL XTI 60 speakers where the Tweeter section of the board needs looking at!

JBL XTI 5.1 Speakers Crossover
JBL XTI series crossover

DATS v3 testing all of the JBL XTI Speaker drivers

I dont think anyone has ever done this, it may not seem that important to anyone as these are going straight back into there designated enclosures but i though if anyone came across these drivers and wanted to build there own enclosures or replicate the JBL XTI speakers then here are all the TS parameters for each driver for anyone to do so!
You can also read on for the enclosure dimentions or click here to jump to that section

A2101A TS Parameters

JBL XTI 5.1 Speakers
JBL Tweeter
Re
Fs
Qts
Qes
Qms
Le
Mms
Vas
Cms
Rms
Z (max-min)
BL
Xmax

A2105A TS Parameters

JBL XTI 5.1 Speakers
JBL 5″ Driver
Re
Fs
Qts
Qes
Qms
Le
Mms
Vas
Cms
Rms
Z (max-min)
BL
Xmax

A2106A-L TS Parameters

JBL XTI 5.1 Speakers
6.5″ JBL Driver
Re
Fs
Qts
Qes
Qms
Le
Mms
Vas
Cms
Rms
Z (max-min)
BL
Xmax

The Repair and Restoration

A fair bit of the time i spent on fixing these involved removing old glue and surround residue, it was absolutely caked on and very diffucult to remove, It kept smearing all over the place and left an oily residue that was not easy to pull out of the plastic on the top of the basket.
Rubbing alcohol worked to a certain point but more extreme measures were needed in the end!

Replacing the foam surrounds

Replacing the surrounds was fairly easy! The hardest part was removing the leftover foam glued to the underside of the cone. Having paper cones which fold up very easily makes the job even harder as getting underneath was a very long winded and slow process.
The other issue i had was removing residue glue along the edge and manufacturing spill over on the top of the cone, It took me for ever to pick off slice and patiently wait for glue removal agents to do their magic whilst trying not to ruin the cone! I was very worried about discolouring or bending the cone and causing a crease to develop.

See also  Goodmans RB20

More comming soon!

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