Aadams

Have you verified the tweeters and woofers operate? If they are all working, you got a good deal for 55€. The pair with back wired tweeters are later versions.

tysontom Your statement below, buried in another thread, is quite germane to this AR9 thread: ....when I had both LSTs together, I wired them in parallel and used the 2205 for a period of time, but this amp would enter into the "Power Guard" limited output on frequent occasions. With stacked LSTs, the bass response had more impact, of course, due to the additive effect of mutual-radiation impedance with the woofers fairly close together. This is somewhat akin to the "stacked-Advent" effect that was so widely admired years ago, despite the Advent's other shortcomings. Anyway, I subsequently traded the 2205 amp for a new MC-2500, which I kept for several years. It worked perfectly and provided all the power I needed. I never drove the LSTs needlessly hard, but on some music with wide dynamic range, even the 2500 would light-up the Power Guard soft-clipping lights. The sound was about as dynamic as anything I've ever had either before or since! The AR9s had a wider dynamic range with better clarity, but the LSTs had the most spacious, life-like sound on certain music due to the extremely wide dispersion. " Aadams

It might be simpler to connect another pair of speakers and see if the problem is duplicated. Is your amp a vintage unit? Pre 1990s?

Good question it sounds like crosstalk in the amp circuits.

Are all the drivers the correct model numbers and do both tweeter/mid units operate? If the answer to all is yes then it is worth the effort. You could defer the crossover mod and use an equalizer.

Outstanding!! Based on my memory, it seems you have expanded the information content during the final buffing period. Thanks.

For Classic AR 12 inch speakers the ideal placement is recessed in a bookcase or a wall midway between floor and ceiling. Every other placement is a compromise and depends on your listening position in relation to the speaker placement and the room boundaries. Roy Allison wrote the document that describes how to optimize the room placement of a 3 way box speaker. Linked below

Good. If no amp tone controls or equalizer you’ve done all you can.

The AR 2x is a bit later variation of the AR2. The AR2 was designed to be placed in a shelf long side down. The AR2x works equally well placed on either side. Both units are 2 way with 10" woofers but the crossover frequency is very different, which means the speakers could be made to sound very different when using the rear tweeter attenuators. However if the old tweeter controls will allow you to set the tweeters at max output the speakers should sound almost the same or maybe even indistinguishable. The tone controls of your amplifier would then be used to equally tailor sound adjustments to each speaker. This is assuming your speakers are original and not internally altered. One indication would be if the grills are still permanently attached with glue and staples. If you can remove the grills then you should post photos of the fronts with grills off. Also easily removed grills may mean they are not even AR on the inside. Your AR2 probably has a cloth surround woofer which could be ok if you don't hear odd noises, but the 2x may have a foam surround woofer which by now would be very degraded, if all is original. You should be careful with the volume control to avoid damage .

I don't recall a major cabinet refurb documented on this site that did not remove the drivers. Of the AR9/90 cab rebuilds, the drivers were removed to accomplish the dirty work and heavy handling that is required to finish correctly. The foam ring is nice but not essential. Many AR9s never had them on mid or tweet. The Acoustic Blanket IS essential Vertical Series kit, is part of the branding and cannot practically be removed intact nor replaced with any fidelity to the original. The LMR is the rarest of all the drivers in the cab and should be removed anyway in order to verify its internal sealed enclosure has not snapped loose from all the apparent rough handling these cabs have received. Don't remove any of the white damping material from anywhere unless removal is necessary to reseal the internal enclosure. Removing mids and tweeters to safe keeping at the risk of losing the foam ring is prudent. Your ears will never miss the foam ring if it is lost. Adams

Did this transaction occur before or after you asked us what you could get for $600? Good deal. The hard to find expensive pieces appear to be in place and undamaged. All that remains is a lot of elbow grease and patience.

You are probably right. Speaking for myself, I much prefer listening to tinkering or fabrication so restorability and repair to original form is an important factor to me. All top line ARs were good speakers. By the late 80s there were several good speaker brands but finding OEM replacement parts for old speakers, including late model ARs, can be difficult. However, if the price is right any speaker purchase can be rationalized as a good choice.

You didn't say if you are prepared to DIY. Agree with the AR91 and would suggest the AR92. Both are high performance and good replacement aftermarket mids and tweeters are available if originals can't be found which is not true for many earlier or later AR models. Your $600 could be a bit low for decent 91s. You could find 92s for $600. As a backup, Epicures from the mid to late 70s that used double woofers and double tweeter would be within your budget, have bass similar to an AR 12" and still have good parts availability but they are not commonly found for sale. I have a pair of Epicure 20+ which I use everyday but not for music listening. For comparison to something new, approaching the AR91 or 92 in performance, you would look at the new KLH 5 perhaps or the new JBL Century, which is not sealed. Good working ARs can be an amazing bargain.

I would be happy to contribute but this is pretty much a one track forum. This topic might better fit in the Other Speakers and Electronics forum unless you are primarily looking for AR recommendations in the 10" - 12" category.

Ligs The answer to your question is yes. I have been using a 58s as the woofer for about 2 years and went back to the direct wired 98ls woofer on the floor with baffle perpendicular against wall in the same position as the 58. The difference is an improvement and quite noticeable.

You sure you have everything wired in phase? Inside and out? The 90 is very close to a 9.

As long as the jumper wire is connecting T to 2 you are OK. Use 1 and 2.

Except for the turntable the whole system is at least 50 years old and with appearance very nicely preserved. What do you want to know? If you want to merely test the speakers for electrical operation I would consider using an another amp for now instead of the ST120.

Sounds like a nice vintage system. You can get help here but it would speed things along l if you provide model numbers of the amp and preamp as well as photos of the speakers front and back. Photos of the entire system would be very interesting. Adams

I think you need to stop.

Premium duct tape is much stickier than the less expensive per/length rolls and is your best and safest method. And it works.

I used duct tape applied to the dented area and gently tugged it out. You may still see evidence of a dent. Others have had success with a vacuum cleaner nozzle I was not willing to try that method on the first attempt.

This thread has a @tysontom post that mentions 60 LSTs per month in 1972. That build rate over 4 years yields 2880 units.

Page 37 https://worldradiohistory.com/Archive-All-Audio/Archive-HiFI-Stereo/80s/Stereo-Directory-1982.pdf I am saying that you cannot find an explicit statement in english saying it is rated for continuous operation at 4 ohms. I know of only one receiver from that period that would operate 2 or even 3 sets of 4 ohm speakers simultaneously and safely. There must have been others but not many. and a Happy New Year!

Short answer. Skip it. There isn't any evidence it was rated for continuous output below 8 ohms. Also it is old, really old, and my experience at least has been that such amps are not to be trusted without careful examination by a trusted tech. There are a lot of amplifiers but the supply of AR speakers is fixed. Happy Holidays