mvboland Posted November 12, 2022 Report Share Posted November 12, 2022 I recently came to possess a pair of AR-3s that my father bought new way back when (serial numbers C-0977 and C-0978) and I would appreciate the group's wisdom on how best to approach them. They are both functional with sound coming from all 3 drivers when connected to the Dynakit Mark III amps that they have been paired with for as long as I remember (amps were the last update project!). The potentiometers are functional in that there is sound from the mid and hi drivers with them turned all the way up and no sound from them when turned down but there is some "scratchiness" in the middle. The audio coming from them sounds muted in the mid-hi frequencies but I am not old enough to remember what they are "supposed" to sound like. I was able to successfully remove the front grille from one of them (have not touched the other one yet) and the drivers are not obviously damaged, unlike like some I have seen online! The cloth surround on the woofer is also intact (see attached). The woofer cone is easily displaced but returns faster than I expected based on online comments. I measured the frequency response of both speakers with all of the potentiometers turned up using a calibrated microphone (see attached). Based on all of the above, I am hoping those of you with deep knowledge of these speakers can recommend repairs. I have new capacitors for the crossovers and am prepared to clean the potentiometers. I also ordered the "special" coating for the cloth speaker surrounds. Beyond that, I am wondering: If the mid and hi drivers might warrant a tune up by one of the experts available online given the frequency response in that range seems diminished (or just update the crossovers first)? If the bass performance is as expected - it looks anemic on the frequency response curve compared to the one published in High Fidelity: Thanks to everyone in advance! -Michael Quote Link to comment Share on other sites More sharing options...
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