Page 2 of 4 FirstFirst 1234 LastLast
Results 16 to 30 of 60

Thread: Array 1400 with Mcintosh MC275 MKV and 501s

  1. #16
    Senior Member
    Join Date
    Mar 2008
    Location
    Coast of Maine
    Posts
    537
    Which speaker tap are your using? 8 Ohm's? Have you tried to bi-wire using the different taps from the amps to the HF/LF section of the Arrays?

  2. #17
    Senior Member Mctwins's Avatar
    Join Date
    Feb 2010
    Location
    Earth
    Posts
    521
    Hi

    You have to use an active crossover for your MC275. The amp will run hotter and more inefficiently. There is no use to run a amp in fullrange when the 1400 array has a crossover freq at 750Hz from bass to M/T.

    About the sensitivity on the amp you have to know the accual load impedance on each transducer. As I see it, you have 6ohm on bass and 4ohm on the high and 3ohm on the ultrahigh and you have to know how much power they can handle per transducer. You have allready a passive crossover on M/T what is the nominal impedance load on the high and ultrahigh??? Then the calculation can begin. You have to know this first.

    About the harshness in your room you have to take some reverberation measurements to be able too see what is wrong here. Timc... has a point here. I don't think the harshness will go away if you put a tube amp.

    I woulden't bi-amp these speakers, but that's me.

    MC501 is enough for those speakers because the max recommended amp power is 300W at 8ohm.

    Thanks

  3. #18
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    14,548
    Quote Originally Posted by Mctwins View Post
    I woulden't bi-amp these speakers, but that's me.
    It's arguably easier to just buy SAM1HF's and SAM2LF's instead if bi-amping is desired.

  4. #19
    Member
    Join Date
    Jul 2010
    Location
    Singapore
    Posts
    44
    Quote Originally Posted by timc View Post
    Using the HT sound for reference is a mistake. You should get someone knowledgable to measure your inromme response (impulse response). I will be surprised if you don't see any anomalies, taking into acount your description of the sound.

    My guess is that you either have "step" in the respons giving you a peak in the 8-10KHz area, or that you have an uneven reverberation time in your room.
    Thanks , I will measure myself and check the 8-10khz area

  5. #20
    Member
    Join Date
    Jul 2010
    Location
    Singapore
    Posts
    44
    Quote Originally Posted by tom1040 View Post
    Which speaker tap are your using? 8 Ohm's? Have you tried to bi-wire using the different taps from the amps to the HF/LF section of the Arrays?
    Tried different taps , 8ohms , 4ohms , 8 for horn and 4 for bass , 4 for horn and 8 for bass.
    Both 8 ohms have bigger soundstage and more dynamics . Both 4ohms narrow the soundstage but more warm and airy . 8 for horn and 4 for for bass sounds funny . 4 for horn and 8 for bass sounds better , airy vocals with wider soundstage .

    However , all the combinations still cannot get what I want

  6. #21
    Member
    Join Date
    Jul 2010
    Location
    Singapore
    Posts
    44
    Quote Originally Posted by Mctwins View Post
    Hi

    You have to use an active crossover for your MC275. The amp will run hotter and more inefficiently. There is no use to run a amp in fullrange when the 1400 array has a crossover freq at 750Hz from bass to M/T.

    About the sensitivity on the amp you have to know the accual load impedance on each transducer. As I see it, you have 6ohm on bass and 4ohm on the high and 3ohm on the ultrahigh and you have to know how much power they can handle per transducer. You have allready a passive crossover on M/T what is the nominal impedance load on the high and ultrahigh??? Then the calculation can begin. You have to know this first.

    About the harshness in your room you have to take some reverberation measurements to be able too see what is wrong here. Timc... has a point here. I don't think the harshness will go away if you put a tube amp.

    I woulden't bi-amp these speakers, but that's me.

    MC501 is enough for those speakers because the max recommended amp power is 300W at 8ohm.

    Thanks
    Think I will have to buy a more powerful tube amp to control both horn and bass if want to try a tube amp. Is the Mcintosh MC2102(100W/channel) enough for the Array 1400?

  7. #22
    Senior Member timc's Avatar
    Join Date
    Oct 2006
    Location
    Norway
    Posts
    958
    I would wote: no.
    2213 + 2435HPL w/aquaplas + H9800 (Matsj edition)

  8. #23
    Member
    Join Date
    Jul 2010
    Location
    Singapore
    Posts
    44
    Quote Originally Posted by timc View Post
    I would wote: no.
    Thanks Tim . Seems like I need to save more for dual MC2102 or MC2301 monoblocks

    Not sure if the Rogue Audio zeus tube amp is a good match to my Mc C220 pre and my CD player ....

  9. #24
    Senior Member Audionutz's Avatar
    Join Date
    Nov 2007
    Location
    Australia
    Posts
    177
    Some suggestions based on my experience and initial frustration with the 1400 Array;

    1. They need to be raised by about 5 inches off the floor.

    2. Get rid of the standard spikes (if you're using them) and make some longer ones, or place blocks of dense timber under the standard spikes to get the speakers up to 5 inches.

    3. Tilt the speakers back about 5deg from the horizontal

    4. The LE14 needs at least 150 watts of good quality amp, my Krell KSA 150 seems to work well.

    5. Horn/Tweeter needs at least 130 watts SS power.

    6. Allow at least 300 hours break in - thats what mine have taken anyway. They now sound considerable different than they did at first !


    Just my 2 cents worth, but may be helpful to you.

    Cheers

    'Nutz
    Thats not a speaker ......*That's* a Speaker !
    (With apologies to Michael J. "Crocodile" Dundee)

  10. #25
    Administrator Robh3606's Avatar
    Join Date
    Apr 2003
    Location
    Rocinante
    Posts
    8,036
    6. Allow at least 300 hours break in - thats what mine have taken anyway. They now sound considerable different than they did at first !
    No kidding?? What kind of changes are you hearing?? Are they better now, well did the issue you had with them improve??

    Rob
    "I could be arguing in my spare time"

  11. #26
    Senior Member martin_wu99's Avatar
    Join Date
    Jul 2007
    Location
    Xi'An,China
    Posts
    1,492
    No pics,no truth!
    46 lover

  12. #27
    Senior Member Audionutz's Avatar
    Join Date
    Nov 2007
    Location
    Australia
    Posts
    177
    Quote Originally Posted by Robh3606 View Post
    No kidding?? What kind of changes are you hearing?? Are they better now, well did the issue you had with them improve??

    Rob
    For the first couple of months, I began to wonder what all the fuss was about with these. In fact, I'd almost given up on them and even had them listed on eBay. Luckily, they didn't sell.

    At first they were very strident and harsh in the highs with a pronounced peak, exp on high freq female vocals. Also, the bass was dull and ill defined - no snap or musicality to it at all.

    I thought it was my room - then I thought it was my amps - eventually I decided it was either my ears or the speakers themselves.

    However, with the assistance of a couple of friends (thanks Woofer !) I persevered. Tried a multitude of amps, cables, speaker positions, preamps, etc etc until I really thought I'd go crazy ....

    Other associates pointed out the high crossover point of the LE14 - an obvious flaw they stated. Yet others pointed to poor cabinet construction and the bass port etc etc

    Knowing that JBL has more experience in speakers than almost anybody I could talk to, but also being aware that everything is built to a price and commercial reality is just that - reality, I still decided to keep going with them.

    Boy, am I glad I did. At about the 300 hour mark, they finally started to come to life and now sound amazing. Its been nice to shove them in the faces of all the doubters, I must admit ...

    I don't know if this is just my pair, or is symptomatic of the model, as I have not heard another pair.

    However, I suspect that these may be one of those speakers that reward effort in all areas of setup.

    I'll post some pics when I get the time

    Cheers

    'Nutz
    Thats not a speaker ......*That's* a Speaker !
    (With apologies to Michael J. "Crocodile" Dundee)

  13. #28
    Senior Member Woofer's Avatar
    Join Date
    Jun 2005
    Location
    Australia
    Posts
    694
    Yep! Everything 'nutz said.
    Especially the bit about tilting them about 5 degrees. It works for most speaks.
    You really don't want the throat of the horn hitting you fair square smack between the eyes.
    Just that couple of degrees off axis, and preferably in the vertical axis makes all the difference.
    Everything blends then....
    Try it when all else fails.
    I might be deaf, but I can still hear da bells! (Quasimodo)
    .... Oh, and the Kick Drum.

  14. #29
    Senior Member timc's Avatar
    Join Date
    Oct 2006
    Location
    Norway
    Posts
    958
    Quote Originally Posted by Woofer View Post
    Yep! Everything 'nutz said.
    Especially the bit about tilting them about 5 degrees. It works for most speaks.
    You really don't want the throat of the horn hitting you fair square smack between the eyes.
    Just that couple of degrees off axis, and preferably in the vertical axis makes all the difference.
    Everything blends then....
    Try it when all else fails.

    You are forgetting that tilting the Array in the vertical direction, is the same as tilting most horn speakers in the horisontal direction. Dispersion wise that is. Anyway, i will try this with the K2 clones i have made.
    2213 + 2435HPL w/aquaplas + H9800 (Matsj edition)

  15. #30
    Senior Member Woofer's Avatar
    Join Date
    Jun 2005
    Location
    Australia
    Posts
    694
    No, not forgetting.
    What you're trying to avoid is line of site straight down the throat.
    That's where female vocals are the most active.
    I might be deaf, but I can still hear da bells! (Quasimodo)
    .... Oh, and the Kick Drum.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Array 1400 help
    By jasonyeo in forum Lansing Product General Information
    Replies: 6
    Last Post: 10-29-2010, 09:00 AM
  2. Array 1400 with Mcintosh MC402
    By jasonyeo in forum Lansing Product General Information
    Replies: 33
    Last Post: 10-11-2010, 05:22 AM
  3. Array 1400
    By tom1040 in forum Lansing Product General Information
    Replies: 28
    Last Post: 12-09-2009, 10:56 PM
  4. 1400 Array
    By Techbot in forum System Information
    Replies: 9
    Last Post: 08-26-2006, 09:11 PM

Posting Permissions

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