A slightly different take on the Dreadnought
F1nut
Posts: 45,405
For many years I wanted to upgrade the AI-1 SDA cable on my stock AI-1, but I wanted to keep the original pin/blade type terminal and socket because I never liked the idea of using binding posts for the connections. I don't know exactly why, I just didn't. I looked and looked for something that would work, but never did find anything. Along came the Dreadnought. I liked the idea of using a better isolation transformer, but still didn't want to use binding posts, so I did nothing. Then at one point another Polkie and I were looking at having new pin/blade terminals made, but that never panned out. When the 1000V Avel deal came up I knew it was time to abandon my hope of finding a pin/blade type terminal and look for something else. I found the Neutrik Speakon connectors and decided that is what I would use.
Since I use the excellent MIT Shotgun S1 cables I wanted to use the same for my new SDA cable. I talked with the good folks at MIT about this and they didn't think their cables with the network boxes would be a good idea as those boxes are directional. They suggested using the Shotgun cable without the boxes, so I acquired 16 feet. They warned me that this cable was a pain to terminate and they were right. The guts are not simply your typical stranded wire and that's probably all I should say about that. I have to thank the good folks at MIT for making this possible, thank you!
So, with the cable decided on I made very careful measurements to find out which of Neutrik connectors would work. I found that the NLT4MP-BAG female chassis socket would just fit between the upper Cardas binding posts on my 2.3TL's in place of the stock pin/blade socket. I chose the NLT4FX-BAG for the male end. As the MIT cable measures 21mm in diameter and the maximum inside diameter at the tail end of the NLT4FX-BAG shell is only 16mm I had to remove the rubber bushing, the metal ring that holds it in place and the plastic locking device inside the shell. That still wasn't enough, so I had to use my Dremel to enlarge the end of the shell. Let me tell you that was a lot of work. Things went very smoothly after that and the cables were done.
Needing an enclosure for the transformer I looked around and found something I liked from a company in China, but their stock sizes weren't what I wanted or needed, so I asked about custom sizes to which they said sure. After sending them my drawings they got back to me saying sure, no problem, but we have a minimum order of 10 for custom work. Since I didn't need 10 I dropped that idea and looked elsewhere. I talked with a certain someone (THANK YOU!) that was willing to make me a one off and placed the order.
The work on the binding post plate to accommodate the Neutrik chassis socket was a bit tricky because it's a one shot deal, but all went smoothly and installing the Avel in the enclosure was straight forward. I'm leaving out some of the finer details in this project, but I would suggest that one should have a certain level of knowledge, the right tools and the skill set required before tackling such a project. If anyone has specific questions, I would be glad to help.
I would like to thank all those that have gone before me on similar projects. You shared your knowledge, experiences and gave me ideas to work with. You guys make this forum the best around.
Oh yeah, sounds GREAT!!!
Both cables finished.
Close up of the Neutrik connector.
The Neutrik chassis socket installed. MIT jumpers, of course!
I tried black cap screws first....nah
With stainless steel cap screws.....much better.
The cover lined with Dynamat.
The guts. Stainless steel hardware was used to attach the transformer.
Behind the antique table I use for my gear.
Damn, she's pretty.
Since I use the excellent MIT Shotgun S1 cables I wanted to use the same for my new SDA cable. I talked with the good folks at MIT about this and they didn't think their cables with the network boxes would be a good idea as those boxes are directional. They suggested using the Shotgun cable without the boxes, so I acquired 16 feet. They warned me that this cable was a pain to terminate and they were right. The guts are not simply your typical stranded wire and that's probably all I should say about that. I have to thank the good folks at MIT for making this possible, thank you!
So, with the cable decided on I made very careful measurements to find out which of Neutrik connectors would work. I found that the NLT4MP-BAG female chassis socket would just fit between the upper Cardas binding posts on my 2.3TL's in place of the stock pin/blade socket. I chose the NLT4FX-BAG for the male end. As the MIT cable measures 21mm in diameter and the maximum inside diameter at the tail end of the NLT4FX-BAG shell is only 16mm I had to remove the rubber bushing, the metal ring that holds it in place and the plastic locking device inside the shell. That still wasn't enough, so I had to use my Dremel to enlarge the end of the shell. Let me tell you that was a lot of work. Things went very smoothly after that and the cables were done.
Needing an enclosure for the transformer I looked around and found something I liked from a company in China, but their stock sizes weren't what I wanted or needed, so I asked about custom sizes to which they said sure. After sending them my drawings they got back to me saying sure, no problem, but we have a minimum order of 10 for custom work. Since I didn't need 10 I dropped that idea and looked elsewhere. I talked with a certain someone (THANK YOU!) that was willing to make me a one off and placed the order.
The work on the binding post plate to accommodate the Neutrik chassis socket was a bit tricky because it's a one shot deal, but all went smoothly and installing the Avel in the enclosure was straight forward. I'm leaving out some of the finer details in this project, but I would suggest that one should have a certain level of knowledge, the right tools and the skill set required before tackling such a project. If anyone has specific questions, I would be glad to help.
I would like to thank all those that have gone before me on similar projects. You shared your knowledge, experiences and gave me ideas to work with. You guys make this forum the best around.
Oh yeah, sounds GREAT!!!
Both cables finished.
Close up of the Neutrik connector.
The Neutrik chassis socket installed. MIT jumpers, of course!
I tried black cap screws first....nah
With stainless steel cap screws.....much better.
The cover lined with Dynamat.
The guts. Stainless steel hardware was used to attach the transformer.
Behind the antique table I use for my gear.
Damn, she's pretty.
Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk
Post edited by F1nut on
Comments
Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
"I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion."
My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....
"Green leaves reveal the heart spoken Khatru"- Jon Anderson
"Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
I'll be doing something similar but with a different MIT cable that works with what I'm currently running. Unfortunately I have to use binding posts on the case. I'm not to particular for that though.
Nice jumpers too.
The shotgun cable had to be a bear to work with.
what are the jumpers made from?
Backup Rig-2 CH-Rogue Audio Zeus w/Factory Special Dark Mods,Joule-Electra 300ME Platinum Preamp,OPPO-105 w/Modwright Tube Mod, Auralic Aries G2.1,Polk 2.3TL,3.1TL's,Dreadnought,RTA-15TL's,1C's All Fully Modded,2xRTA-12c's ,Benchmark DAC3 HGC,Synology NAS,VPI Scout w/Dynavector DV-20XH and Rogue Audio Ares Phono Preamp,Sony PCM-R500 DAT,HHB-850 Pro CDR,Tascam CC-222SLMKII Cassette/CDR,MIT S3.3 Shotgun Cables,Shunyata Hyra-8,Shunyata and Triode Labs Power Cords
I’M OFFENDED!!!!
Preamp: Joule Electra LA-150 MKII SE
Amp: Wright WPA 50-50 EAT KT88s
Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
Cables: Mits S3 IC and Spk cables| PS Audio PCs
Those are Shotgun jumpers. They do make jumpers for their stuff you just have to call and custom order them. With that said they only make jumpers for their higher end speaker cables, no no jumpers for any EXp folks :sad:
Great job Jesse!!
Just kidding, good work as always my friend!
I'm curious though, what don't you like about using spades for the AI-1 cable?
*****************************
"Unwad those panties and have a good time man. We're all here to help each other, no matter how it might appear." DSkip
Thanks Greg.
Yes, it is all there better than before.
MIT's, of course.
Spades always come loose, always. The only reason I'm using spades on the jumpers is because my speaker cables use bananas. Every once in a while I check the spades and sure enough, one or two will be loose and believe me, I torque the hell out of 'em.
Yeah, I wasn't sure you wanted me to say. Folks, Larry made the case and the faceplates.
LOL.....Yep, Larry McLaren.
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk
You might want to look into AudioQuest spades. Mine have never became loose, even with very heavy speaker cables pulling on them. I always have to use a wrench to loosen the Cardas posts when I want to remove them. If this is something you want to pursue, AQ is good about making product recommendations for specific applications.
"Polk SDA-SRSs are hopelessly out of date both sonically and technologically... I see no value whatsoever in older SDA speakers."~Audio Asylum Member
"Knowledge, without understanding, is a path to failure."~DK
"Those who irrationally rail against something or someone that is no threat to them, actually desire (or desire to be like) the thing or person they are railing against."~DK
Do it - I'm betting you'll love it. Avel Lindberg sells the 800VA transformer off the shelf too.
If you search the forum you'll find some great "how to" posts.
This is all in your mind...placebo effects.
"Polk SDA-SRSs are hopelessly out of date both sonically and technologically... I see no value whatsoever in older SDA speakers."~Audio Asylum Member
"Knowledge, without understanding, is a path to failure."~DK
"Those who irrationally rail against something or someone that is no threat to them, actually desire (or desire to be like) the thing or person they are railing against."~DK
Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
"I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion."
My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....
"Green leaves reveal the heart spoken Khatru"- Jon Anderson
"Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
I've got my Dreadnought built (thanks Neil & Larry), but I'm mulling how to terminate at the speaker (currently updating CRS+'s). Will probably just default to Cardas spade. Wondering if I should, or even could, start breaking the DN in before speaks are done? It's KILLING me seeing the DN just sitting there.
Craig
Audio: PS Audio DirectStream Jr. * Belles 20a * Pass Aleph 30 - Zu Omen DW * Sunfire Sig II - Polk SRS 2.3tl * PSAudio PP3 * MIT S3
Den: Sonore ultraRendu * Cary xCiter * Dayens Menuetto * KEF LS50
Exercise Room, Wadia 171 iPod Dock, PS Audio PerfectWave Transport, Innuos Streamer with Cat 6 cable connection to PS Audio PerfectWave MkII DAC w/Bridge II, AQ Sky XLRs, Perreaux PMF3150 Amp, Dreadnought, Supra Rondo 4x2.5 Speaker Cables, SDA 1Cs (Vr3 Mods Xovers).
Synology 713+ NAS on Gigabit LAN serving PW MkII DAC & DirectStream DAC.
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SRS 2.1TL
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CSiA6
FXiA4
FXiA6
SDA 2A's
Monitor 10A's
http://www.douglasconnection.com
Thanks Jesse!!:biggrin:
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just to be clear . . you've got a 1KVA tranny on its way? . . . . . cuz I've got a spare, thoughts?
G
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