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Norman Nicolai

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About Norman Nicolai

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  1. I had a pair of Model 20's purchased in 1970(?) and they has black surrounds right from the factory.
  2. I would give anything to hear a pair of refurbished KLH 9's. There was a thread on another audiophile blog about 6 months ago about someone from northern NJ purchasing a set of the 9's. I never read anything further about them. I wonder if they sold them or gave up trying to restore them, and if this is one of the set of 9's. Purchasing a set of the 9's is certainly a major commitment in resources and labor, and as much as I would love a pair in my LR, even if I had the space, which I do not, it's more than I'm willing to bite off.
  3. My KLH Model 6 restoration project is nearly finished. The only thing left is to replace the speaker grille with a porous off-white linen fabric, and then I will post some before and after photos. Most original Model 6's I have seen have had a dark brown fabric grille cover, and that is what came with these speakers. But the original fabric was worn and frayed, and I think that an off-white cloth will pair better with the Walnut finished cabinet. The speakers sound terrific, but I have hit a bit of a glitch: Every now and then, one speaker seems to almost cut out, and the volume goes way down. If I jiggle the 3-position tweeter crossover switch on the back it returns to full volume, but that does not prevent the problem from recurring in an hour, or so. Can I spray some Deoxit into the switch from the back, or will that damage something? If the Deoxit can't be used I may have to remove the woofer and reopen the cabinet to troubleshoot this. I wound rather not do that. I don't want to take the speakers apart again if I can help it. Overall, when the speakers are working, they sound great! They remind me of the Model 20's I had many years ago, only richer and with more bass. Right now they are paired to a comepletely refurbished Sherwood S8000IV Receiver that I picked up last week.
  4. Kent, thanks so much for all your help, especially the links to specific items on the Parts Express website. Having a link to a specific item is a huge help! So this is where I am: 1. I found a replacement tweeter on eBay and won the auction. I will have the item in a week. 2. The caps and sealing material were ordered today on Parts Express. 3. The Butyl sealer was already ordered on eBay. With the speakers removed I've started to work on refinishing the cabinets. All the parts on order should start to arrive by the time the cabinets are refinished. Thanks, again. You probably saved me a great deal of time and prevented me from making more than a few errors, even though I've been researching this online for the last few weeks! When the project is done I'll post photos of the finished product. Yeah, I think I now officially have the vintage speaker "bug" and will take on new projects in the future. I've always had an affinity for KLH products. One of my first "HiFi" purchases was a set of KLH Model 20's back in 1971 just before I set off for college. Getting a pair of Model 5's or 6's was something I always wanted. The Model 6's should pair well with the rest of my restored vintage equipment, a Fisher 500B receiver and an AR-Xa turntable.
  5. Thanks, Kent. I appreciate your input. I misspoke on the "epoxy". I meant to say butyl and already have some on order from the same eBay vendor on your link. I am totally inexperienced with restoring speakers and the caps looked kind of new to me, so I'm glad to have someone else look at them. I'm planning on replacing them with caps from PE after getting your opinion. This question shows my inexperience: Are caps directional, that is, do they have to be inserted into the wiring in a specific way; is there a (+) and a (-) side? If so, are they labeled? I have carefully labeled everything I have removed from the crossover. With my limited experience, both the photo links and the wiring schematic will be a big help. Thanks, again. NN
  6. I just purchased a pair of KLH Model 6 speakers and need some advice. Photos are attached. My observations and questions: 1. The tweeter on one of the speakers does not work. Originally, I thought the crossover was responsible, but it looks like the caps in the crossover were replaced. Do they look like the correct caps? 2. I connected the non-working tweeter to an amplifier and it's definitely dead. Photo attached. Are the 1.75 " tweeters in the KLH models 5, 6, 17, and 20 identical? I have read that they are but wanted other opinions. I'm going to shop for a replacement on eBay. Any other sites good for this? 4. The woofers are in good shape but it looks like they are a bit dry and need to be re-apoxied. Any opinions from the photo attached? 5. The drivers were not sealed very well in the cabinets. The cabinets are in good shape externally. But I doubt that they were air tight. I'm planning on using electricians putty to get a good seal on the drivers and hot glue the inside edges of the cabinets and the back panel to get a good seal. Any other suggestions on how to accomplish this? Thanks, and would appreciate any other feedback!
  7. Just read the posts from this old thread and wanted to say that I agreed with your thoughts more than anyone else. There are some subtle differences in the AR line of 12" speakers, but the overall body of work is still amazingly accurate and pleasing to the ear. One more fact that to me is obvious, but not talked about enough during these posts. The human ear is a variable instrument. Each persons individual hearing acuity substantially colors their perception of sound. That accounts for much of a persons preference, or taste, a point I find missing from most of these discussions. That being said, the entire AR family of loudspeakers is one that I wouldn't mind being related to.
  8. Thanks for the welcome, Tom. I've posted on a few topics, but I'm still a relative newcomer to the forum. I did not know that AR reprised the Demo Room in 1994. I was in Florida for a couple of years in the mid-nineties, so even if I knew about it, it's highly unlikely that I would have been unable to visit. That must have been during much of the restoration work to the terminal. I took a look at the home page for AR products recently, and aside from a few outdoor speakers, it looks like they are out of the speaker business entirely, so I guess there is not much hope for a 70th birthday celebration at GCT in 2024. I just discovered this thread while I was thinking of posting this very topic. It's been months since the last post and I don't know if anyone else will see this, but here goes: My memory for detail isn't as sharp as everyone else, but I do remember one important fact that wasn't mentioned in any of the other posts. The AR Demonstration Room was air conditioned while the rest of the Grand Central Terminal was not! I was a sixteen year old working a summer job as a messenger in the Lower Level of Grand Central in the summer of 1970. (At that time there was no such thing as Email, scanners, FAX Machines, and even bicycle messengers were rare. Most paperwork in Manhattan was hand-delivered by messenger.) As a teenager about to start my last year of H.S. I the knew very little about HiFi audio, but I knew a good place to escape the heat on my lunch hour in the middle of August. For me, the AR Demo Room was an oasis in the middle of a noisy, crowded city. I remember the tranquility and coolness of the room, augmented by the waves of mostly classical music that emanated from the AR3's. Although my initial motivation was escape from the heat, the AR Demo Room also became one of my introductions to better audio quality. I discovered the AR Room in late August, shortly before quitting my job and taking a week off before returning to Staten Island and school. So while my exposure to HiFi was short, it did stay with me. By the next year, like most other kids heading off to college, I had saved up enough money for my first Mid-Fi audio system. It didn't include AR speakers which were over my budget, but it was a huge improvement over what passed for an audio system in my parents home. I'm a retired senior now, and I've started to dabble again with audio equipment as one of my hobbies. (I recently purchased a reworked AR-Xa) Memories are so much more important to me now, compared to when I was younger. I suppose it's a way of reliving the fresh experience of youth. The AR Demo Room at Grand Central Terminal is one of my best memories of that summer.
  9. Just curious. What Harman Kardon receiver were you using for 6 years, and what was deficient about it? I've had a Harman Kardon receivers for a number of years, the latest being the HK 3490, and have been very happy with them. I'm not driving AR3's rented at 4 ohms, but all my speakers were either vintage KLH, Advent, or EPI and I thought the HK receivers paired well with them, especially the HK 3490 rated at 120 WPC.
  10. I just discovered this thread while I was thinking of posting this very topic. It's been months since the last post and I don't know if anyone else will see this, but here goes: My memory for detail isn't as sharp as everyone else, but I do remember one important fact that wasn't mentioned in any of the other posts. The AR Demonstration Room was air conditioned while the rest of the Grand Central Terminal was not! I was a sixteen year old working a summer job as a messenger in the Lower Level of Grand Central in the summer of 1970. (At that time there was no such thing as Email, scanners, FAX Machines, and even bicycle messengers were rare. Most paperwork in Manhattan was hand-delivered by messenger.) As a teenager about to start my last year of H.S. I the knew very little about HiFi audio, but I knew a good place to escape the heat on my lunch hour in the middle of August. For me, the AR Demo Room was an oasis in the middle of a noisy, crowded city. I remember the tranquility and coolness of the room, augmented by the waves of mostly classical music that emanated from the AR3's. Although my initial motivation was escape from the heat, the AR Demo Room also became one of my introductions to better audio quality. I discovered the AR Room in late August, shortly before quitting my job and taking a week off before returning to Staten Island and school. So while my exposure to HiFi was short, it did stay with me. By the next year, like most other kids heading off to college, I had saved up enough money for my first Mid-Fi audio system. It didn't include AR speakers which were over my budget, but it was a huge improvement over what passed for an audio system in my parents home. I'm a retired senior now, and I've started to dabble again with audio equipment as one of my hobbies. (I recently purchased a reworked AR-Xa) Memories are so much more important to me now, compared to when I was younger. I suppose it's a way of reliving the fresh experience of youth. The AR Demo Room at Grand Central Terminal is one of my best memories of that summer.
  11. I recently purchased a vintage Fisher 500B receiver. Trying to connect 12 gauge speaker wire to the terminals has been difficult. Interestingly the, Fisher owners manual recommends 12 gauge "zip cord" for use as a speaker cable, but the terminals on the back of the receiver really don't accommodate wiring that thick. When the 12 gauge cord is wrapped around the terminal it almost touches other terminals due the the thickness of the wire. Has anyone else run into this problem and come up with a solution?
  12. I have a Harman Kardon 3770 receiver rated at 120 watts per channel. According to the users manual I can push two sets of speakers as long as each set is rated at 8 ohms. The speakers sound great stacked! Thanks for your info.
  13. I just purchased a set of both OLA's and Advent A3's. Can you stack them in combination like you can OLA's? The speaker connections on the back panel don't indicate "+" and "ground". One connector says "8 ohms" and the other connector has a "O". What is the correct way to wire them if you are connecting one set of speakers? How do you wire them if you want to stack them, given the odd labels on the back of the speaker? Thanks, any help would be appreciated.
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