Question regarding SDA interconnect cable and non-common ground amp ?
gyosa
Posts: 752
If one wishes to use a dual mono , non-common ground amp with 1C’s , could one do it if the interconnect cable was not connected between the speakers , without damaging either the amp or speakers ?
Hypothetically, of course …
Yes , I need a A1 interface cable …😃
Bk
Hypothetically, of course …
Yes , I need a A1 interface cable …😃
Bk
PS Audio S300 , WiiM Ultra , Yamaha wxc-50 , Salk SuperCharged Songtowers , Kimber Kable 4TC, Sony 48” - BEDROOM
B&K EX-442 ( it will go in my casket when I die ... ) , PS Audio 4.6 preamp ( old school , but it still jams on ... ) , Eversolo DMP-A6 , Boston Acoustic voyager 7’s - POOL
Parasound A21, Eversolo DMP-A8 , Kimber Kable 4vs , Ascend Acoustics ELX Ribbon Towers , Sony XBR-A8F 65” OLED - DEN , MAIN system
Onkyo TX-nr609 , Polk atrium 7 , Boston acoustic sound ware (4) , Boston acoustic sub , B&W center , Sony 65” TV - PATIO
B&K EX-442 ( it will go in my casket when I die ... ) , PS Audio 4.6 preamp ( old school , but it still jams on ... ) , Eversolo DMP-A6 , Boston Acoustic voyager 7’s - POOL
Parasound A21, Eversolo DMP-A8 , Kimber Kable 4vs , Ascend Acoustics ELX Ribbon Towers , Sony XBR-A8F 65” OLED - DEN , MAIN system
Onkyo TX-nr609 , Polk atrium 7 , Boston acoustic sound ware (4) , Boston acoustic sub , B&W center , Sony 65” TV - PATIO
Comments
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Yes
Correction you need a dreadnought. -
If you don't have the innerconnect cable attached, you lose about 50% of the speaker output and no SDA. Not really a workable solution.
Some 1C's can't use the dreadnought. You need to verify by serial number of the Left and Right speaker if the dread can be used.
H9"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul! -
Well , I don’t have a dreadnought or an A1 , and can’t find either …. Does anyone know the answer ?
BkPS Audio S300 , WiiM Ultra , Yamaha wxc-50 , Salk SuperCharged Songtowers , Kimber Kable 4TC, Sony 48” - BEDROOM
B&K EX-442 ( it will go in my casket when I die ... ) , PS Audio 4.6 preamp ( old school , but it still jams on ... ) , Eversolo DMP-A6 , Boston Acoustic voyager 7’s - POOL
Parasound A21, Eversolo DMP-A8 , Kimber Kable 4vs , Ascend Acoustics ELX Ribbon Towers , Sony XBR-A8F 65” OLED - DEN , MAIN system
Onkyo TX-nr609 , Polk atrium 7 , Boston acoustic sound ware (4) , Boston acoustic sub , B&W center , Sony 65” TV - PATIO -
The answer is YES you can if the cable isn't hooked up, but you loose 50% of the sound and have no SDA. It sounds terrible, but yes you can hook non-common ground amps IF the innerconnect is NOT connected.
It's a waste of a great speaker, IMO as they are neutered.
H9"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul! -
Well , I don’t have a dreadnought or an A1 , and can’t find either …. Does anyone know the answer ?
Bk
Do a search here for Avel and/or Dreadnought.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 -
If your cable is pin blade you can use an AI-1 or a Dreadnought, If it is blade blade your speakers serial numbers need to fall in between these numbers to use them.
Polk Audio SDA 2.3tl Fully Hot Rodded. 😎
SVS SB16 X2
Cary SLP-05/Ultimate Upgrade.
Cary SA-500.1 ES Amps
Cary DMS 800PV Network
OPPO UDP 205/ModWright Modification
VPI Scout TT / Dynavector 20x2
Jolida JD9 Fully Modified
VPI MW-1 Cyclone RCM
MIT Shotgun 3 cables throughout / Except TT, and PC’s -
It’s pin-blade ….
Thanks y’all ….
I need to switch up my amps …. Looking for a new pair of speakers , but until I find some I’ll need to run the 1c’s without the cable …
BkPS Audio S300 , WiiM Ultra , Yamaha wxc-50 , Salk SuperCharged Songtowers , Kimber Kable 4TC, Sony 48” - BEDROOM
B&K EX-442 ( it will go in my casket when I die ... ) , PS Audio 4.6 preamp ( old school , but it still jams on ... ) , Eversolo DMP-A6 , Boston Acoustic voyager 7’s - POOL
Parasound A21, Eversolo DMP-A8 , Kimber Kable 4vs , Ascend Acoustics ELX Ribbon Towers , Sony XBR-A8F 65” OLED - DEN , MAIN system
Onkyo TX-nr609 , Polk atrium 7 , Boston acoustic sound ware (4) , Boston acoustic sub , B&W center , Sony 65” TV - PATIO -
L600 had @heiney9 not missing his 1C's
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It’s pin-blade ….
Thanks y’all ….
I need to switch up my amps …. Looking for a new pair of speakers , but until I find some I’ll need to run the 1c’s without the cable …
Bk
If your amp is of decent quality, then if I were you I would just spend the money and build a Dreadnought, it would be much cheaper than buying another amp. -
It’s pin-blade ….
Thanks y’all ….
I need to switch up my amps …. Looking for a new pair of speakers , but until I find some I’ll need to run the 1c’s without the cable …
Bk
If your amp is of decent quality, then if I were you I would just spend the money and build a Dreadnought, it would be much cheaper than buying another amp.
The 800v/1000v dreadnought has worked better than the plain cable interconnect. It works on both common ground and NON-common ground amps. This coming from a guy that had the A1-interconnect cable as well. I've had both 800 and the 1000 torrids both are well worth the money if you plan on keeping the SDA's for any amount of time. -
^^^THIS^^^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 -
L600 had @heiney9 not missing his 1C's
That is true. Still have a soft spot for the 1C's.....they are still here being stored, taking up a lot of space. If they were CRS's I could swap them in and out occasionally very easily. The 1C's are too big to be moving in and out.
Pretty sure we are going to be moving into a bigger house in the next 6 months. I might be able to keep both of them.
But I am smitten with the L600's. The synergy with my current rig is really, really special. Still have some tweaking to do. Add an external 10MHz clock, better power conditioning and probably revisit some power cables.
Nothing more will be added to the rig until we get the move figured out.
Sorry for the tangent, but I agree with @invalid and @F1nut..........if you really want to keep the SDA's build a dreadnought. They are pretty simple and 110% effective.
H9
"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul! -
50%? No. Some loss of output, including bass response. But not 50%. Of course the SDA effect will be totally missing, but the SDA signal doesn't add to the effective SPL. From a certain perspective, it removes/reduces SPL (at certain positions, namely your ears).If you don't have the innerconnect cable attached, you lose about 50% of the speaker output and no SDA. Not really a workable solution.
ALL 1Cs can use an isolation transformer...although some 1Cs may need a VERY MINOR modification. The units needing mods to use the transformer can be identified by serial number.Some 1C's can't use the dreadnought. You need to verify by serial number of the Left and Right speaker if the dread can be used.
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That's not the way I understood that notice from Polk. Maybe I'm wrong. (I don't think so.)If your cable is pin blade you can use an AI-1 or a Dreadnought, If it is blade blade your speakers serial numbers need to fall in between these numbers to use them.
I took it to mean that all 1Cs had the pin-blade connectors except the ones within the serial number groups, which could use the AI-1 or other isolation transformer if the "TB-1 modification kit" was installed.
So the 1Cs with the blade/blade sockets would automatically fall within that serial number range. There were no 1Cs with blade/blade sockets that did not fall within that range, therefore no 1Cs that could not be made compatible with the AI-1 or other isolation transformer.
The TB-1 modification kits were the "authorized" modification to make the blade/blade 1C (and 2B) speakers compatible with the isolation transformer...but there are a multitude of aftermarket solutions that work just as well.
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That's a bit of double talk.50%? No. Some loss of output, including bass response. But not 50%. Of course the SDA effect will be totally missing, but the SDA signal doesn't add to the effective SPL. From a certain perspective, it removes/reduces SPL (at certain positions, namely your ears).
The SDA drivers produce sound at approximately 50% of the stereo drivers. Therefore, if they are not powered/playing there will be a loss of SPL.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 -
That's not the way I understood that notice from Polk. Maybe I'm wrong. (I don't think so.)If your cable is pin blade you can use an AI-1 or a Dreadnought, If it is blade blade your speakers serial numbers need to fall in between these numbers to use them.
I took it to mean that all 1Cs had the pin-blade connectors except the ones within the serial number groups, which could use the AI-1 or other isolation transformer if the "TB-1 modification kit" was installed.
So the 1Cs with the blade/blade sockets would automatically fall within that serial number range. There were no 1Cs with blade/blade sockets that did not fall within that range, therefore no 1Cs that could not be made compatible with the AI-1 or other isolation transformer.
The TB-1 modification kits were the "authorized" modification to make the blade/blade 1C (and 2B) speakers compatible with the isolation transformer...but there are a multitude of aftermarket solutions that work just as well.
Since you or anyone else (other than Polk and that is iffy) do not know what the serial numbers started at for the 1C and
2B your assumption is flawed.
A multitude of aftermarket solutions that work just as well???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 -
My assumption might be flawed. I am unable to understand how the crossover of a speaker pair sold as a "1C" or "2B", using drivers intended for the 1C, or the 2B respectively, could be so different that it could not be simply, easily modified to accept an isolation transformer. A crossover system that doesn't accept an isolation transformer would be, essentially, the 1B or 2A. Different drivers, different crossover philosophy/generation. And--this is important--the schematics are posted on this web site, it's no secret that the older generation of speakers is not compatible with an isolation transformer while the newer generation is compatible.Since you or anyone else (other than Polk and that is iffy) do not know what the serial numbers started at for the 1C and 2B your assumption is flawed.
Aside from the SDA interconnect cable plug installed in the speaker cabinets of 1C and 2B models--most of which were pin-blade; and some were blade-blade, along with several inches of wire--what in the crossover is different between the blade-blade and pin-blade crossover assemblies? What more could be different with blade-blade 1Cs or 2Bs other than the ones in the serial-number list that would make them incompatible? Has anyone ever posted THAT schematic?
Sure. YOU are a big proponent of the "Neutrik" sockets (SpeakON series...right?) which could replace the blade/blade sockets; other folks have used RCA jacks in place of blade/blade sockets.A multitude of aftermarket solutions that work just as well???
Electrically, a guy could twist bare wire, with or without solder or crimped connectors. Ugly, ungainly, and likely with poor service life...but it could be done.
There's as many ways to bypass the blade/blade socket as there are people to imagine it. But as said previously, and on the photo posted in this thread, the "official" method was the TB-1.
