SDA1Cs cabinet and crossover choices??

geppy1
geppy1 Posts: 3,075
edited June 2010 in Vintage Speakers
Two SDA 1c questions
Is there any sound or engineering reason to choose the studio cabinet over the cabinet with the endcaps or the vice versa? The drivers are at different heights from the floor and the passive is closer to the mids in the studio version.

The early version has blade and blade with two circular crossover boards. The later ones have a very nice everything on one board with nice wire harnesses and pin and blade. Is there a reason to use one over the other?? Keith
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  • george daniel
    george daniel Posts: 12,096
    edited June 2010
    I prefer the end capped 1C's p/b,I cannot hear any differences between the studios or endcapped C's,,,dunno if that answers your question
    JC approves....he told me so. (F-1 nut)
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  • ben62670
    ben62670 Posts: 15,969
    edited June 2010
    The pin blade single board XO is easier to mod.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • Conradicles
    Conradicles Posts: 6,138
    edited June 2010
    I'm going to go out on a limb and say the sound is so similar between SDA-1C "studio" and "standard" that the choice would come down looks of the particular model.

    Now when you are talking the blade/blade with a dual crossover version are we sure those are SDA-1C's or are they a different version? Are the capacitors the exact same?
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  • geppy1
    geppy1 Posts: 3,075
    edited June 2010
    They are 1Cs The very early 1C came with blade blade and two round Xover boards. Considering the studio cabinets are crap it makes it easier but the board differences i find interesting. Have not checked the caps and such. The studio is the later 8/88 ones the end cap one is earllier 9/87. Point being is it worth just moving the pin bade stuff over to the endcap cabinets??
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  • dpowell
    dpowell Posts: 3,068
    edited June 2010
    Don't mean to hijack your thread but are there differences in the cabinet construction between the standard and studio models or is it just the presence or lack of the end caps?
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  • F1nut
    F1nut Posts: 50,757
    edited June 2010
    All of the regular 1C's are studio versions under the end caps and side cloth.
    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

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  • geppy1
    geppy1 Posts: 3,075
    edited June 2010
    That is probably true but the drivers are at different levels. The studio drivers are about 2 inches higher then the end cap version and the space between the passive and the mids is larger on the endcap version. My larger question concerns the boards.
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  • heiney9
    heiney9 Posts: 25,217
    edited June 2010
    The cabinet difference between the Studio and Standard is about an 1" in both height and width and the depth is exactly the same, so I'm not sure what you mean. This is according to the owners manual for the later version of the 1C's. The width can be attributed to the cloth side panels, but I'm sure the bezel the drivers are mounted in are identical for both.

    Standard 1C's weigh 100lbs
    Studio 1C's weigh 85lbs

    I still believe based on the weight there are other minor postive differences between the cabinets with the Standard cabinet being slightly more sollid. The end caps don't weigh 7.5lbs each............but then I wouldn't doubt Jesse's word either. So it may be.

    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!
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  • thsmith
    thsmith Posts: 6,082
    edited June 2010
    I have owned both Studio and end cap and could tell no differences in sound, well I did after I upgraded the end caps caps and resitors but that is a given.
    Speakers: SDA-1C (most all the goodies)
    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
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  • geppy1
    geppy1 Posts: 3,075
    edited June 2010
    I must be on dope because those sure look different to me. Not to mention i measured them.
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  • heiney9
    heiney9 Posts: 25,217
    edited June 2010
    geppy1 wrote: »
    I must be on dope because those sure look different to me. Not to mention i measured them.

    Geppy, per our PM I was not calling you a liar. Just quoting what I read in the Polk owners manual as far as cabinet dims for the later production 1C's.

    I bet the cabinet on the left is from a 1B studio (it may say or have been sold as a 1C studio, but read futher). It doesn't make sense for Polk to create a studio and standard 1C cabinet with different baffle dimensions. Why incur the extra cost of maching two different baffles for the same speaker. They also may have used up left over cabinets from 1B studios for the early runs of 1C studio's with B/B and the split x-over's. This is just a guess but typical for Polk products of this era.

    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!
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  • geppy1
    geppy1 Posts: 3,075
    edited June 2010
    It may be they used or copied old 1B cabinets but it is a 1C. All parts are correct in fact it is newer then the endcap version 8/88 verses 9/87 I had another pair of 1C studios and it looked exactly like this one and was dated late 1989.. keith
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  • Conradicles
    Conradicles Posts: 6,138
    edited June 2010
    Which one do you like better Keith?
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  • heiney9
    heiney9 Posts: 25,217
    edited June 2010
    geppy1 wrote: »
    It may be they used or copied old 1B cabinets but it is a 1C. All parts are correct in fact it is newer then the endcap version 8/88 verses 9/87 I had another pair of 1C studios and it looked exactly like this one and was dated late 1989.. keith

    Yep, confusing as hell!!! Not sure anyone, even at Polk knows why. The baffle could be exactly the same, but perhaps with the studio's the base it just slightly taller. :confused:

    I prefer the look of the standard model and I prefer the later (simplified x-over) and the later side wound voice coil drivers.

    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!
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  • geppy1
    geppy1 Posts: 3,075
    edited June 2010
    Both have 6511 and 6510s. The only differnece in these is a the cabinet baffles and the way the ctrossover is handled. The hole for the passive is in a different location in each cabinet Several inches lower.
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  • Joe08867
    Joe08867 Posts: 3,919
    edited June 2010
    The PR location is different and looking at the picture so is the size. Probably making up for cabinet dimensions.

    Seems strange that they would make to different cabinets for the same speaker.
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  • geppy1
    geppy1 Posts: 3,075
    edited June 2010
    Here are pictures of the early 1C crossovers and the later crossover. Looks alot neater to me
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