Closed Thread
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 20

Reload Thread: Impedance and Sound Quality

  1. #1
    UFO's Avatar
    UFO
    UFO is offline Professional Space Cadet



    Join Date
    Nov 2005
    Location
    Los Angeles, CA
    Posts
    6
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Icon32 Impedance and Sound Quality

    I think the best car system I ever had was with a pair of EPI M120b home speakers, laying on their backs in the hatch of a 1973 Plymouth Duster and powered by a 12W/channel Sanyo under-dash cassette deck (remember those?) and a cheapo 5-band graphic EQ unit with something like 15w/ch boost made by a company called Royal Sound.

    I'm fairly certain those speakers were 8 ohm but they put everything I've had since to shame. Unfortunately they were huge particle board boxes that basically filled the car, and the woofer cones eventually just fell apart from temp/humidity extremes and age (I bought them in something like 1978, mind you.)

    The question - finally: Does impedance affect sound quality in any way? IOW, is there any advantage in SQ between, say, a pair of 2 ohm speakers vs. 4 or 8?

    Someone recommended that I try Adire Audio Extremis drivers for more raw power, but they're 8 Ohm speakers. I have two pairs of MB Quart PCE216s installed and I think at least one pair is fried. Can I swap in a pair of Adires and run two pairs of speakers having different impedances off of the same four-channel amp without destroying the amp?

    Thanx,

    <***>







  2. #2
    squeak9798's Avatar
    squeak9798 is offline Banned



    Join Date
    Jun 2004
    Location
    USA
    Posts
    26,300
    Post Thanks / Like
    Images
    16
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    Quote Originally Posted by UFO
    The question - finally: Does impedance affect sound quality in any way? IOW, is there any advantage in SQ between, say, a pair of 2 ohm speakers vs. 4 or 8?
    No.

    Someone recommended that I try Adire Audio Extremis drivers for more raw power, but they're 8 Ohm speakers. I have two pairs of MB Quart PCE216s installed and I think at least one pair is fried. Can I swap in a pair of Adires and run two pairs of speakers having different impedances off of the same four-channel amp without destroying the amp?

    Yes.

    However, you could not use the Adire Extremis on the MB Quart passives. And you would need a tweeter for the Extremis as well as some way to bandpass filter them (highpass and lowpass them).




  3. #3
    Join Date
    Nov 2005
    Location
    Minneapolis, MN
    Age
    32
    Posts
    24
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    Speaker impedances are the load that your amplifier is carrying. Think about if you were skipping down a hallway, now if you skipped down that hallway holding 40 lb. dumbbells; your skip would turn into a run/walk wierd thing. The skip is the musical signal... the more you load it, the more distortion that can be played.




  4. #4
    Join Date
    Nov 2005
    Location
    Minneapolis, MN
    Age
    32
    Posts
    24
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    Keep in mind that most amplifiers are capable of running at somewhat higher loads.. so the answer to your question is that impedance can affect SQ.. but probably only at extremes ( 4 ohm amp running at 1/2 ohm load),




  5. #5
    adam71's Avatar
    adam71 is offline P9 = Ultimate SQ



    Join Date
    Jul 2003
    Location
    Michigan
    Posts
    5,795
    Post Thanks / Like
    Images
    10
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    In all reality the the lower the resistance the higher the distortion which means the lower the SQ. This may or may not be audible.




  6. #6
    azbass's Avatar
    azbass is offline the salty ca.com mod



    Join Date
    Sep 2004
    Location
    Long Beach, CA
    Posts
    34,922
    Post Thanks / Like
    Images
    6
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    2 omh sounds better than 4 omh




  7. #7
    adam71's Avatar
    adam71 is offline P9 = Ultimate SQ



    Join Date
    Jul 2003
    Location
    Michigan
    Posts
    5,795
    Post Thanks / Like
    Images
    10
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    Quote Originally Posted by azbass
    2 omh sounds better than 4 omh
    2ohm is louder than 4 ohms but it does NOT sound better.




  8. #8
    JimJ's Avatar
    JimJ is offline Tangled Up in Blue



    Join Date
    Jun 2004
    Location
    Hillsborough, NC
    Posts
    31,680
    Post Thanks / Like
    Mentioned
    1 Post(s)

    Re: Impedance and Sound Quality

    Quote Originally Posted by adam71
    2ohm is louder than 4 ohms but it does NOT sound better.
    1. Maybe it's louder, maybe it isn't.

    2. Let's do an ABX test on that one




  9. #9
    azbass's Avatar
    azbass is offline the salty ca.com mod



    Join Date
    Sep 2004
    Location
    Long Beach, CA
    Posts
    34,922
    Post Thanks / Like
    Images
    6
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    he thought i was serious?




  10. #10
    JimJ's Avatar
    JimJ is offline Tangled Up in Blue



    Join Date
    Jun 2004
    Location
    Hillsborough, NC
    Posts
    31,680
    Post Thanks / Like
    Mentioned
    1 Post(s)

    Re: Impedance and Sound Quality

    Quote Originally Posted by azbass
    he thought i was serious?
    Yeah...




  11. #11
    adam71's Avatar
    adam71 is offline P9 = Ultimate SQ



    Join Date
    Jul 2003
    Location
    Michigan
    Posts
    5,795
    Post Thanks / Like
    Images
    10
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    Quote Originally Posted by azbass
    he thought i was serious?
    You weren't?? I could have sworn you were since you didn't use any smileys.




  12. #12
    adam71's Avatar
    adam71 is offline P9 = Ultimate SQ



    Join Date
    Jul 2003
    Location
    Michigan
    Posts
    5,795
    Post Thanks / Like
    Images
    10
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    Quote Originally Posted by Jack Frost
    1. Maybe it's louder, maybe it isn't.

    2. Let's do an ABX test on that one
    What the fuck are you talking about?? If you have a 2 ohm set of speakers they will receive twice the power that a 4 ohm speaker receives if it is the same amp. That is also taking into consideration that both sets of speakers have the same sensitivity.




  13. #13
    JimJ's Avatar
    JimJ is offline Tangled Up in Blue



    Join Date
    Jun 2004
    Location
    Hillsborough, NC
    Posts
    31,680
    Post Thanks / Like
    Mentioned
    1 Post(s)

    Re: Impedance and Sound Quality

    Quote Originally Posted by adam71
    What the fuck are you talking about?? If you have a 2 ohm set of speakers they will receive twice the power that a 4 ohm speaker receives if it is the same amp. That is also taking into consideration that both sets of speakers have the same sensitivity.
    Your statement...and like I said before, that's not always the case I know plenty of amps that will do the same power @ 2 ohms that it does at 4...or 4 and 8, or whatever. Both solid state and otherwise

    As for the second part of what I said, if there were any links to credible ABX tests that show conclusively that a lower impedance sounds worse to the ear, I'd love to read them. If it's a measurable difference, but splits 50/50 to a group of listeners...it's all a bit academic.




  14. #14
    adam71's Avatar
    adam71 is offline P9 = Ultimate SQ



    Join Date
    Jul 2003
    Location
    Michigan
    Posts
    5,795
    Post Thanks / Like
    Images
    10
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    Quote Originally Posted by Jack Frost
    Your statement...and like I said before, that's not always the case I know plenty of amps that will do the same power @ 2 ohms that it does at 4...or 4 and 8, or whatever. Both solid state and otherwise

    As for the second part of what I said, if there were any links to credible ABX tests that show conclusively that a lower impedance sounds worse to the ear, I'd love to read them. If it's a measurable difference, but splits 50/50 to a group of listeners...it's all a bit academic.
    My first post said that it may or may not be audible so I didn't necessarily say it sounded worse. I just stated that the lower the resistance the higher the distortion.




  15. #15
    squeak9798's Avatar
    squeak9798 is offline Banned



    Join Date
    Jun 2004
    Location
    USA
    Posts
    26,300
    Post Thanks / Like
    Images
    16
    Mentioned
    0 Post(s)

    Re: Impedance and Sound Quality

    Quote Originally Posted by adam71
    I just stated that the lower the resistance the higher the distortion.
    in the amplifier.....which if it's within it's linear range will still likely be an inaudible amount




Closed Thread
Page 1 of 2 1 2 LastLast

Similar Threads

  1. Sound Quality Comparison- 2 ohm DVC vs 4 ohm DVC
    By ljb211087 in forum Subwoofers
    Replies: 15
    Last Post: 11-24-2005, 12:21 AM
  2. What's impedance matching?
    By Greg200SE-R in forum Speakers
    Replies: 6
    Last Post: 06-01-2005, 06:54 PM
  3. Speaker Impedance for Jeep Grand Cherokee with Infinity Sound System
    By ll kaidoy ll in forum General Discussion
    Replies: 2
    Last Post: 03-26-2005, 11:46 PM
  4. Replies: 4
    Last Post: 07-09-2004, 09:26 PM
  5. Sound Quality Sub n' Amp
    By miller610 in forum Subwoofers
    Replies: 3
    Last Post: 12-14-2003, 03:09 PM

Posting Permissions

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

1e2 Forum