Many of the older Infinities have become
classics. We designed and built the Watkins
woofers for these, and we restore them to
their original specifications. So don't
compromise their quality with a cheap
and inferior repair job.
We also have new woofers. Please see below.
The hazards of refoaming:
Foam surrounds are made with many different degrees of
stiffness (the amount of "give" when flexed). Since we
designed and manufactured the woofers, we know the proper
flexure rate (compliance factor) to use. This is the only way to
obtain the correct amount of cone movement, and thus the same
volume of bass and the same low distortion the speaker was
originally designed for.
Proper voice coil centering is also critical. When attaching the new surround to the frame, the cone-coil assembly must be positioned such that the voice coil doesn’t rub the magnetic pole pieces. One method is to cut out the dome cap in the center of the cone and insert shims. This destroys the original dome cap and a generic replacement changes the frequency
response and the sound of the speaker. We don't use shims, and leave the dome cap completely intact.
The other method of alignment is to move the cone-coil assembly
around until you don’t hear the coil scrape metal. This does not
center the coil accurately at all. This is true even when using low
frequency test tones, as all they do is make the scraping louder.
They give no indication of when the coil is in the center of the
magnetic field. We avoid these problems with our exclusive
electronic coil alignment process that centers the coil with
perfect symmetry. The dome cap is undisturbed, retaining the
original frequency response, and the coil is aligned the same
as it left the factory for linear cone movement and minimum
We check all the following:
Buzz and rattle
Integrity of dome attachment to cone
Integrity of coil attachment to cone
Integrity of coil attachment to spider
Spider adhesion to frame
Integrity of magnet, plate, and frame attachments
Accelerometer output and distortion
Input lead integrity and dress
We clean the input terminals if needed.
We also use polyether foam which lasts much longer than
other types of foam, along with Airflex adhesive. It remains
flexible, the same as that used for original construction.
Three working days, and all repair is overseen
by Bill Watkins. Guarantee is five years.
Prices And Shipping Instructions
Cost to refoam and align woofer coils:
15 inch $85 each
12 inch $80 each
10 inch $75 each
8 inch or less $70 each
Cost to refoam and align mid-range coils:
If you have speakers where someone has botched the repair,
there may be an additional charge.
Add cost for packing, insurance, and shipping as
15 inch - PER PAIR
12 inch - PER PAIR:
10 inch - PER PAIR:
8 inch or less and mid-range - PER PAIR
Infinity control woofers are $125.00 each for
repair and their associate woofers are $90.00
each. This due to the extra work, care, and time
taken with them.
Payment by personal or business check included
with speakers is preferred. Otherwise Mastercard,
Visa, or Paypal.
Warranty is five years on any part we replace and
any work we do.
Packing and Shipping Instructions:
Remove the speaker from the cabinet by removing the
screws that hold the speakers in. Before disconnecting
the two wires (four for dual-drive) be sure to tag the wires
and speaker terminals or draw a "map" to insure correct
Bolt or tie-strap the speakers together, face-to-face.
all around such that speakers do not touch
Watkins Engineering Inc.
We now have new Watkins-Infinity 12 inch
dual-drive woofers (latest polypropylene
cone version) in stock.
Cost is $750.00 per pair plus shipping as
These are exact replacement dual-drive
Infinity-Watkins woofers for:
Infinity QLS-1 (Quantum Series)
Infinity Quantum 2
Infinity Quantum 3
Infinity Quantum 4
Infinity Quantum 5
Infinity Quantum JR
Reference Standard RS-1.5
Reference Standard RS-2.5
Reference Standard RS-4.5
Several other models
Questions? email: email@example.com
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