Amplifierz
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Posts posted by Amplifierz
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Got the last one done aswell. Had a few hick ups along the way, but they are working and sounding amazing... You guys really were right that with my resistors the sound was way off.
Now with the lpads in there they sound like totally different speakers.
Thanks everyone for contributing to my journey.
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Yes Pierre, indeed. Good thing i managed to score another set of original AR5 mids.
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@lance G Thx Lance!
It all worked out fine, this speaker sounds superb now! Only thing left is to replicate the process on the other speaker and we are back in business.
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Plus: Managed to score a Acoustic Research A-07 amplifier. After an overhaul i think these two will mate quite well. In my small friendgroup everyone knows that i love AR, and everything they encounter regarding AR they will send my way. Lovely isn't it? Friends that make you buy more audio gear.
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13 hours ago, Aadams said:
Resto guide shows woofer coil to middle (2) post and the other to the T post.
Thx. @Aadams I wasn't sure. Have everything connected now. About to close this one up for a test run.
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Back at it again. Wired up the mid lpad as per restoration guide, but i am running against a wall here. I don't know where to connect the wires coming from the coils... ?
Maybe the pictures provide some clarity for you guys.
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7 minutes ago, Aadams said:
Not absolutely necessary but if you must troubleshoot later it will be a standard wiring configuration that will not in itself be an obstacle if you need help.
Thx Aadams. I will be leaving the third post out of the equation. The standard wiring in the restoration guide doesnt mention any difference in wiring regarding the lpads. I will be preparing the mid lpad shortly. It's dinner time here in NLD and my daughter is screaming for pancakes. So i guess duty calls. Brb
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7 minutes ago, Aadams said:
Not absolutely necessary but if you must troubleshoot later it will be a standard wiring configuration that will not in itself be an obstacle if you need help.
Thx Aadams. I will be leaving the third post out of the equation. The standard wiring in the restoration guide doesnt mention any difference in wiring regarding the lpads. I will be preparing the mid lpad shortly. It's dinner time here in NLD and my daughter is screaming for pancakes. So i guess duty calls. Brb
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1 minute ago, Aadams said:
Looks good. It might be simpler later if you re-install the middle post before you get the lpads permanently positioned.
The middle post? As in the middle cable terminal? I don't really need that i think...
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Today, i finally managed to pick up the project. I've been very busy lately with no time to tinker around. So.. Progress. I prepared the L-pad for the tweeter in one speaker. It's a bit messy, but i know exactly what is what. Just wanted to check with one of the guru's here, is the way that i wired up the lpad correct?
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Hallo, dit forum is voornamelijk op gezet voor Amerikaanse Acoustic Research luidsprekers.
Ik denk dat de luidsprekers die jij hebt een speciaal voor Snyder Hifi geproduceerde luidspreker is. Gezien de gelimiteerde oplage en het gebrek aan informatie.
Groetjes,
Ben
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1 hour ago, lance G said:
I don't know how many others are following this with interest, I know I certainly am. Hats off !
Thanks Lance. I will post some pictures along the line. Maybe someone can use my mistakes so they don't make em.
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On 1/29/2020 at 4:27 PM, Aadams said:
Good job. Hope it works out.
I hope too. But it will sure be better then before. The previous owner put some kind of construction isolation material in there randomly. So by weighing the amount of material that goes in there, copying that for the second speaker at least i have some continuity. The parts have been delivered, i started preparing by removing the banana terminals and my resistors. Already placed the new T-nuts in the cabinet and put some new gasketing tape on the units.
Awaiting the arrival of the new wire so i can start the assembly of the L-pads.
Cheers,
Ben
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I never was very attracted to the newer type of AR speakers, but WOW those nice wood 9LSi's really keeps me drooling.. ?
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1 hour ago, Aadams said:
I think I know why you need additional wire but experience has shown that polyfill is the wrong stuffing for the early ARs. It does change the performance. 22oz to 25 oz so of fiberglass is the correct stuffing. Polyfill was used by AR in its later gen speakers and i'm not saying it can't be made to work in the AR5 but nobody in these pages has reported how to use it in the old classics with satisfactory results. Polyfill will make a perceptible, negative change in the quality of the low bass.
Adams
Hi Adams, thx for your reply. I have found a thread where they guy made it work and was very fond of the performance. The original fibreglass was already gone when i got the speakers. It was replaced with some random isolation material.
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I ordered everything i need. The L-pads with resistors, some new polyfill stuffing, gasketing tape and fresh wiring. Should be here in a couple of days. I'll update the thread once i start putting everything in the 5's.
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9 minutes ago, RoyC said:
Hey Ben, what "supplier" of L-pads are you referring to? Parts Express has lots of them. I'm guessing international shipping is your problem. Where are you located?
Roy
I'm located in The Netherlands. I found a supplier that carries the Dayton Audio L-pads. But they don't have them in stock atm.
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Thank you both for your contributions, i managed to snag a pair of original AR5 mids. (Unmodified?)
I also got me some T-nuts and matching bolts. Saw that the wood in the woofer cut out wasnt going to take another round of unit switching. Also got the message from the supplier of the L-pads that they were out of stock, so i'll have to wait for those. I am thinking of going the chris1this1 route and just order some new potmeters, but they aren't cheap plus shipping and importtax. ? Thinking about it.
I'll keep you posted.
Ben
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Here is the picture of the crossover. Don't think i have to state the obvious.
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Thanks Roy!
Those AR's are my main listeners atm. The other speakers standing next to them aren't ready yet. When i see an opportunity to open up one of the 5's i will take some pictures to show you my handy work.
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7 hours ago, RoyC said:
The rings which were attached to the mids' missing grills contributed to dispersion, which unfortunately is another departure from the original voicing of your speakers in their current state.
The grills could have been removed without cutting, and reshaped. I assume they are long gone at this point (?).
Roy
Yes, the grills are gone.
I'm a fully aware of the fact that these are never going to sound like AR originally intended.
But regarding L-pads, what kind do i need? And how do i hook them up.?
Regards,
Ben
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8 minutes ago, ar_pro said:
What effect will the absence of damping material have on the midrange drivers?
They have higher output, since the radiating surface of the dome is now uncovered. Thats why i needed to lower its output through resistors.
Seeking reviews on Roy C modded Acoustic Research model 2ax
in Acoustic Research
Posted
Yeah indeed those will be rare birds. I think people that aren't aware of the Hivi Mod probably just throw away the speakers with the broken tweeters or randomly screw in a tweeter they found at the shop.