vintage Acoustic Research 2½" cone mid-tweeter from AR-2x speaker c.1970—perfect

Description

Offered for your consideration is one (1) vintage
Acoustic Research
2½ inch cone midrange/tweeter
removed from my AR-2x speaker, USA-manufactured c.1970.  It’s possible that this driver was used in other AR speakers in the 1960’s-early 1970’s, but buyer is responsible for verifying its suitability with their needs.
So, please see the large photos I’ve taken and read the remaining description to decide if this capable AR mid/tweeter should become yours.
This AR driver is in clean, excellent condition.  The paper cone lies underneath the factory diffraction pad, and the whole radiating assembly is protected by an acoustically-transparent grate.  That screen appears to be pushed-in, but it’s not.  It was formed slightly concave to keep that cotton pad in place and is very rigid, fairly-heavy-gauge steel coated in thick black enamel.  Plus, the anodized steel basket is in great shape with no dings or oxidation noted.  And, the +/- terminals are keyed for polarity (yellow dot side = positive) and I’ve left a good length of input wires soldered to the terminals for the new owner’s convenience in retrofitting to their speaker.  For being at least 50 years old, this mid/tweeter is quite well-preserved.
Most importantly, it’s been fully tested and sounds very nice—clear and detailed mid-frequency coverage with crisp highs approaching the threshold of audibility.  Plus, I tested the DC resistance at 6.7Ω, consistent with a nominal 8 ohm driver rating.  Lastly, the mounting flange measures 4½” diameter, the cone a nominal 2½”, it stands about 1⅜” tall (incl. grille), and the mount holes are spaced 2¾” adjacent / 3⅞” diagonal apart, c-t-c.
As pictured and described, this terrific-shape AR-2x midrange/tweeter is offered at a competitive price.
Terms of Sale
:
I encourage interested parties to ask any questions they may have about this listing before committing to purchase.
Payment is due at checkout by
PayPal
. U.S. mailing addresses will pay .95 for very carefully packed shipping via U.S. Postal Service or FedEx with tracking and delivery confirmation. International purchases accepted only from those who are able to pay with
PayPal
including shipping by U.S. Postal Service First Class Parcel Air Mail.  Thanks for looking!
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the cabinet label photo is presented only for donor model reference