Free Shipping on All Orders 1-866-764-1801

Vist our Online Store
+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 30 of 33
  1. #1

    Member Sales Rating: (0)

    Join Date
    Oct 2005
    Posts
    3

    Default Frequency Response

    Polk Staff:

    I'm setting up a lab system and am interested in employing numerous RM6751 satelite speakers. Before I can puchase I need to get a picture of thier frequency response (db as a function of frequency) characteristics. I have not been able to locate this material online. Could you let me know where to find it, or reply with an image of such documentation?

    I need a frequency response profile for the RM6751 satelite speakers.

    Thanks for your time,
    TJVV

  2. #2

    Member Sales Rating: (20)

    Join Date
    Jan 2004
    Location
    7th Circle of Hell - aka DFW
    Posts
    10,670

    Default

    If I understand correctly, you're wanting a plotline of db readout at varying frequencies, correct?

    I don't know if Polk is going to publish something like that. The main issue that you'll run into is those numbers can vary quite a bit based on things like placement, room acoustics, equalization, and even the equipment you have pushing them.

    Now if you're just looking for a frequency range, that's easier...but the frequency curve is what it sound to me that you're looking for...
    Main HT
    Magnepan 1.6QR fronts, POlk R15 surrounds, Pioneer SC-25, Parasound Halo A23, Oppo BDP-105, Panasonic TC-P60ZT60, Sony PS3, Apple TV

    Bedroom System
    Polk Blackstone TL3, Polk PSWi225 Wireless Sub, HK 3490 Integrated, Oppo BDP-103, Sharp Aquos 32" TV, Apple TV

    Office Rig
    27" iMac w/Amarra, AudioQuest Dragonfly 1.2, Focal XS Book, Schiit Valhalla, Cypher Labs Theorem 720, Philips Fidelio X1, Sennheiser HD600, HiFiMan HE-500, B&W P7, LG 47LM7600, Sony PS3, Apple TV

  3. #3

    Member Sales Rating: (2)

    Join Date
    Jan 2002
    Location
    Northborough, MA
    Posts
    306

    Default

    you might want to try the archives of some magizines, something like home theater or sound and vision, they ussually publish frequency responses of the speakers they review. dont think i have ever seen the RM6751 satelite's reviewd though.

  4. #4

    Member Sales Rating: (1)

    Join Date
    Dec 2003
    Location
    Sooner Country
    Posts
    3,988

    Default

    Strange request, I never thought of decorating with frequency plots. What a novel idea. :D

  5. #5

    Member Sales Rating: (13)

    Join Date
    Mar 2002
    Location
    The Mars Hotel
    Posts
    31,287

    Default

    Quote Originally Posted by TJVV
    I need a frequency response profile for the RM6751 satelite speakers.
    That isn't going to happen.
    '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 turd by the clean end."

  6. #6

    Member Sales Rating: (0)

    Join Date
    Oct 2005
    Posts
    3

    Default

    Polkmaniac:
    “If I understand correctly, you're wanting a plotline of db readout at varying frequencies, correct?”
    YES, you are correct.

    ( F1nut ) Why would a reputable manufacturer not make this available. I understand that a speaker might “sound good”, but the proof is in the plot. Yes, that plot may be modified by the driver and environment, but I’m simply concerned with a ‘neutral’ environment baseline. (Acoustic tech’s often acquire baseline measures in an anechoic chamber.) One does not engineer and develop a sound source without taking into account the designs frequency response profile. In fact, one might presume that sound sources are engineered to produce a specifically desired frequency response, based on relevant psychoacoustics and their intended environment of employment. We know that Polk Audio has the numbers and the plots. The question becomes “is the plot respectable enough that they’re willing to share it?” I’m hoping that it is, and I’m hoping that they will.

    Worst case scenario, I can always buy a set, plot the curve myself and return them if they’re not suitable for my purpose. I’d rather not have to go through that bother on the front end. Rather, I’m hoping that Polk will assist me as I go about selecting the product best suited to my needs. We’ll see.

    Cheers,
    TJVV
    Last edited by TJVV; 10-18-2005 at 09:13 PM.

  7. #7

    Member Sales Rating: (0)

    Join Date
    Sep 2005
    Location
    Upstate, NY
    Posts
    159

    Default

    I'm having deja vu.

  8. #8

    Member Sales Rating: (13)

    Join Date
    Mar 2002
    Location
    The Mars Hotel
    Posts
    31,287

    Default

    Quote Originally Posted by TJVV
    Why would a reputable manufacturer not make this available.
    Gee I don't know, trade secret maybe? Why don't you try asking GM for a copy of their engine mapping for the Corvette!?!
    '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 turd by the clean end."

  9. #9

    Member Sales Rating: (7)

    Join Date
    Jul 2001
    Location
    lookin' for fava beans and a nice chianti
    Posts
    12,608

    Default

    One, it's proprietary information. I doubt there are any companies that will give out this info.

    Two, it's basically worthless.

    Three, what's with all the Inspector Gadget types of late?

    BDT
    I plan for the future. - F1Nut

  10. #10

    Member Sales Rating: (1)

    Join Date
    Dec 2003
    Location
    Sooner Country
    Posts
    3,988

    Default

    I simply don't understand the request.......maybe I'm dense. The 6750 is a sub/sat system that can't have an accurate frequency graph unless the placement is extrememly controlled. A powered sub placement and balance with sats has everything to do with how "flat" the curve is, let alone room acoustics.

    I'm not trying to be smart assed, but I may be missing your concern. I do understand trying to get a set of speakers that are known to be "accurate" across the frequency range, if that is what you are trying to achieve, but unless your "lab system" is anechoic itself, what good is it?

    Help me by clarifying yourself, if we missed your point.

  11. #11

    Member Sales Rating: (1)

    Join Date
    Dec 2003
    Location
    Sooner Country
    Posts
    3,988

    Default

    Quote Originally Posted by TroyD
    what's with all the Inspector Gadget types of late?

    BDT

    My guess is college is back in session and all the cute girls haven't gotten tired of the football team yet. Second semester is alot more settled.

  12. #12

    Member Sales Rating: (0)

    Join Date
    Oct 2005
    Posts
    3

    Default

    Sorry guys, I thought I was posting a question to an advanced technical forum on speakers.
    Thank you Polk Maniac and Dennis Gardner for your thoughtful responses.

    For those contributing to the discussion that appear to know decidedly little about frequency response profiles, a ‘little’ research on your part would reveal that many manufacturers do in fact make them available. Some do not provide a graphic representation of such, but choose rather to express that the frequency response is, for example, 30 Hz - 24 kHz [range] +/-3 dB [variance within that range]. This is meaningful information (if you understand it) and is clearly not a proprietary secret, as any body with a spectrum analyzer can get it.

  13. #13

    Member Sales Rating: (2)

    Join Date
    Sep 2003
    Location
    Kansas
    Posts
    7,522

    Default

    Hi TJVV,

    The 6750's (which I assume is like the 6751)lower -3dB limit is 45Hz and the upper -3db limit is 20khz.

    If you want a flatter freq response you'll probably need to spend more $.

    Hope this helps,
    PT

  14. #14

    Member Sales Rating: (18)

    Join Date
    Mar 2004
    Location
    Ottawa
    Posts
    7,397

  15. #15

    Member Sales Rating: (17)

    Join Date
    Jul 2001
    Location
    Northern Colorado
    Posts
    12,074

    Default

    Quote Originally Posted by TJVV
    Sorry guys, I thought I was posting a question to an advanced technical forum on speakers.
    Oh, well that's the problem, Duh. The forum you are posting on is the Polk audio forum.

    madmax
    Vinyl, the final frontier...

    Avantgarde horns, 300b tubes, thats the kinda crap I want... :D

  16. #16

    Member Sales Rating: (7)

    Join Date
    Jul 2001
    Location
    lookin' for fava beans and a nice chianti
    Posts
    12,608

    Default

    Yup, you are definately a putz. My magic 8-ball says that your stay will be short lived.

    I was under the impression he was looking for a graph with the performance over the entire frequency band as opposed to just overall FR limits. My fault for not consulting my Gadget Decoder Ring.

    BDT
    Last edited by TroyD; 10-19-2005 at 02:44 PM.
    I plan for the future. - F1Nut

  17. #17

    Member Sales Rating: (1)

    Join Date
    Jul 2003
    Location
    York, PA / Mumbai, India
    Posts
    4,474

    Default

    To be helpful: Those are some of the lowest, if not the lowest, end speakers polk makes. Without the sub, you'll be lucky if they dig down to 120Hz with any volume. If you are really looking for flat speakers for a lab environement, look elsewhere (or up the product line) From your attitude, I would care to guess that the LSi15 would be the least expensive speaker in the Polk lineup.

    Also, those graphs change with the power supplied. Typically they are graphed at near 1W, but for dynamic response the graphs can shift an move. For a cabinet as small as the one you are looking at, these fluctuations will be very significant.

    If you want to get more info, I would suggest losing the attitude. After all, you are the one asking for the frequency responses on a satellite system which just seems
    Last edited by jdhdiggs; 10-19-2005 at 02:44 PM.
    There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin

  18. #18

    Member Sales Rating: (0)

    Join Date
    Sep 2005
    Location
    Upstate, NY
    Posts
    159

    Default

    hrmm..this question reminds me of this particular post...

    http://www.polkaudio.com/forums/showthread.php?t=32598

  19. #19

    Member Sales Rating: (13)

    Join Date
    Mar 2002
    Location
    The Mars Hotel
    Posts
    31,287

    Default

    I gave you two very thoughtful responses, you just didn't like the answers.

    Well, seeing as I'm such a great guy I looked around and found this "graph" for you, which I know will answer all your questions.
    Attached Images  
    '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 turd by the clean end."

  20. #20
    Polk Engineer
    Member Sales Rating: (1)

    Join Date
    Apr 2004
    Location
    Annapolis, MD
    Posts
    1,441

    Default

    What kind of response do you want? 1M? Ground plane? Infinite baffle?

  21. #21
     Moderator 
    Member Sales Rating: (0)

    Join Date
    Jul 2001
    Location
    Polk Audio
    Posts
    3,850

    Default

    Hello TJVV,
    I have the information you have requested, via email, however my responses have been sent back as "undeliverable". Can you provide another email address?
    Regards, Ken

  22. #22

    Member Sales Rating: (17)

    Join Date
    Apr 2005
    Posts
    7,626

    Default

    Ken is"DA MAN"
    "SOME PEOPLE CALL ME MAURICE,
    CAUSE I SPEAK OF THE POMPITIOUS OF LOVE"

  23. #23

    Member Sales Rating: (1)

    Join Date
    Jun 2003
    Location
    nbnj +/-400 miles
    Posts
    706

    Default

    anyone notice the temperature is dropping? it's like a thousand degrees colder than when i went out to get the paper this morning.

    )

  24. #24

    Member Sales Rating: (17)

    Join Date
    Apr 2005
    Posts
    7,626

    Default

    Uh oh, it's gonna be like that move....."The Day After Tommorrow" :D
    "SOME PEOPLE CALL ME MAURICE,
    CAUSE I SPEAK OF THE POMPITIOUS OF LOVE"

  25. #25

    Member Sales Rating: (6)

    Join Date
    Sep 2003
    Location
    Arizona
    Posts
    16,493

    Default

    Some of you need to get laid. The guy just asked for a frequency plot of a speaker and now he's a troll.

    sheesh....give it a frickin break. This unrelenting "pounding" of new people lately is out of control.

    Transport: Oppo BDP-103/USB HDD (flac)
    DAC/Preamp: Benchmark DAC/PRE
    Power Amp: Parasound HCA-1500A
    Speakers: Harbeth Compact 7ES-3 Monitor
    Cables: Kimber Hero/8TC; DH Labs D-75

  26. #26

    Member Sales Rating: (1)

    Join Date
    Jul 2003
    Location
    York, PA / Mumbai, India
    Posts
    4,474

    Default

    Quote Originally Posted by TJVV
    Sorry guys, I thought I was posting a question to an advanced technical forum on speakers.
    Steve, I think this is what riled up the masses the most. Most people were giving him good info until then.

    And yes, I think some telling someone else that a freq-response graph is usually worthless is good info.
    There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin

  27. #27

    Member Sales Rating: (20)

    Join Date
    Jan 2004
    Location
    7th Circle of Hell - aka DFW
    Posts
    10,670

    Default

    Quote Originally Posted by steveinaz
    Some of you need to get laid. The guy just asked for a frequency plot of a speaker and now he's a troll.

    sheesh....give it a frickin break. This unrelenting "pounding" of new people lately is out of control.
    I agree, looks like Ken is gonna hook him up anyway, so all is well...
    Main HT
    Magnepan 1.6QR fronts, POlk R15 surrounds, Pioneer SC-25, Parasound Halo A23, Oppo BDP-105, Panasonic TC-P60ZT60, Sony PS3, Apple TV

    Bedroom System
    Polk Blackstone TL3, Polk PSWi225 Wireless Sub, HK 3490 Integrated, Oppo BDP-103, Sharp Aquos 32" TV, Apple TV

    Office Rig
    27" iMac w/Amarra, AudioQuest Dragonfly 1.2, Focal XS Book, Schiit Valhalla, Cypher Labs Theorem 720, Philips Fidelio X1, Sennheiser HD600, HiFiMan HE-500, B&W P7, LG 47LM7600, Sony PS3, Apple TV

  28. #28

    Member Sales Rating: (13)

    Join Date
    Mar 2002
    Location
    The Mars Hotel
    Posts
    31,287

    Default

    Ken, don't feed the troll.
    '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 turd by the clean end."

  29. #29

    Member Sales Rating: (20)

    Join Date
    Jan 2004
    Location
    7th Circle of Hell - aka DFW
    Posts
    10,670

    Default

    Jesse, do you have some insight or inside information you'd like to share with the rest of us?

    To me, this is just a guy wanting some information on Polk speakers, but I'm naive that way, so if you know something to the contrary, let us know...

    Cheers,
    Main HT
    Magnepan 1.6QR fronts, POlk R15 surrounds, Pioneer SC-25, Parasound Halo A23, Oppo BDP-105, Panasonic TC-P60ZT60, Sony PS3, Apple TV

    Bedroom System
    Polk Blackstone TL3, Polk PSWi225 Wireless Sub, HK 3490 Integrated, Oppo BDP-103, Sharp Aquos 32" TV, Apple TV

    Office Rig
    27" iMac w/Amarra, AudioQuest Dragonfly 1.2, Focal XS Book, Schiit Valhalla, Cypher Labs Theorem 720, Philips Fidelio X1, Sennheiser HD600, HiFiMan HE-500, B&W P7, LG 47LM7600, Sony PS3, Apple TV

  30. #30

    Member Sales Rating: (13)

    Join Date
    Mar 2002
    Location
    The Mars Hotel
    Posts
    31,287

    Default

    PM,

    You just have to read between the lines. The very first clue are the speakers in question. Nobody buying those speakers (Polk's BOTL) is going to give a rat's south end about a frequency graph.

    ATB,
    The Grumpy Troll Hunter
    '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 turd by the clean end."

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts