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Fixed TC Electronic BC Cabinets

Discussion in 'Amps [BG]' started by xbud, Feb 25, 2014.


  1. xbud

    xbud Supporting Member

    Nov 9, 2012
    Southwestern, PA
    So I found myself constantly looking at other cabinets, I found the BC410, and BC210 cabinets as O.K., but not an overwhelming good sound at loud volumes. So I took the cabinets apart to inspect the drivers and this is what I found,
    [​IMG]

    They didnt lie in the advertising of these cabinets, they are custom Eminence drivers.
    [​IMG]

    Just really low quality offshore Eminence drivers. I was curious of the specs on the drivers so I e-mailed Eminence and they emailed the specs below.

    Re 14.62 Ohms fs 58.7 Hz
    Le 1.06 mH Mms 21.5 grams
    QM 2.76 Mmd 17.7 grams
    QE 0.81 Cms 0.341 mm/N
    QT 0.62 Rms 2.877 N*sec/m
    Xmax 3.30 mm Vas 61.2 liters
    Pmax 75 Watts SD 355.4 cm^2
    Bl 12.01 Tm VD 117.4 cm^3
    Coil Diameter 1.50 Inches EBP 72.9
    Gap Height 0.24 Inches Magnet Weight 20 ounces
    Efficiency 1.49 % Winding Width 0.500 inches
    SPL 93.7 dB 1W-1m

    On the plus side the cabinet itself is made of descent quality, with some bracing between the center supports.
    [​IMG]

    Comparison between the original drivers and th 4 Ohm MCM replacements I am going to use.

    [​IMG]

    Picture of all the drivers replaced, rewired the cabinet in series/parallel.

    [​IMG]

    Redid the 2X10 cabinet as well, below is a stacked picture of both.

    [​IMG]

    I havent had a chance to really crank these up, but so far a quick low volume test tells me this has made a significant impact on the bass authority and clarity. These have a great midrange as well, by far better than the stock drivers TC Electronics loaded these cabinets with.
     
  2. ProdigalBassman

    ProdigalBassman

    Mar 22, 2012
    Xbud,

    Thanks for the info on the TC Electronic BC410. I've been looking at that cab also bcs it's one of the few 4 ohm 410 cabs that I could afford and handles 500W. My question: Why did you change the drivers? Did the cab, as it comes, sound poor? Low volume?

    If so, did you consider buying an empty 410 cab and placing the drivers, horn, crossover etc yourself?

    Joe
     
  3. fritjof

    fritjof

    Apr 26, 2008
    Have you had a chance to do a proper sound test now? I'm considering changing the drivers in my 212 and 210 BC cab, to get a "fuller" sound from my BH500 head.
    I know very very little about those things, so any advice on what speakers to choose and use, and how to wire them, is much appreciated!
     
  4. BassikLee

    BassikLee Commercial User

    Feb 13, 2004
    Deltona, FL
    Disclosures:
    Owner: Brevard Sound Systems
  5. Sponsored by:

  6. xbud

    xbud Supporting Member

    Nov 9, 2012
    Southwestern, PA
    Sorry, I thought this thread was dead after my original post. I remember receiving an e-mail from Morton Ehlers, he seemed to like this post. LOL

    Progigalbassman - To answer your question, the BC Cabinets are fine for what they were designed for. They were designed as moderate cabinets, low cost, low volume. The specs they were designed to (500W) is a program rating the actual RMS on the 410 is closer to 300 Watts. Since then I bought a GK 412NEO to handle my need for loud venues.

    fritjof: The cabinet sounded great at low volumes, but I found less than desirable sounds once cranked (Vibrations). Also I could not use the cabinets together as I originally did because the drivers that TCE put in the BC Cabinets were actually tested at a higher OHM rating so that you could pair a 210 at 8 ohm and a 410 at 4 ohm together and not worry about meeting a 4 ohm min load on an amp. I replaced the cabinets with the original drivers and use the cabinets for practice.

    Unfortunately there are so many variables with cabinet design I am hesitant to make any other changes, I am not a good source for recommendations on replacing the drivers or crossover on these cabinets. I am contemplating my own 2X12 build by making something that looks similar to the Genz Benz NEOX-212T.
     
  7. Threads never die. They will always rise again. They just hang around waiting until someone finds it and pulls on it again to release the Zombie. :dead:
     
    xbud likes this.
  8. fritjof

    fritjof

    Apr 26, 2008
    Ok, thanks for the info. Good to know these things before one ventures into possible speaker disaster. I'm probably gonne wait and stick with the (a bit flat) sound from the cabinets for now, then.
     
  9. BassmanPaul

    BassmanPaul Gold Supporting Member

    Aug 25, 2007
    Toronto Ontario Canada
    Let me get this straight. You bought a pair of TCE speaker cabinets. Didn't like them so you changed out the drivers for cheap, no doubt made in China, MCM drivers. Why didn't you just return the cabinets and buy better cabinets?? Sorry but I'm more than a little confused. :)

    Edit: A further thought, on re-sale these boxes will be virtually worthless.
     
  10. cfsporn

    cfsporn Supporting Member

    Aug 20, 2011
    New York City
    Did you put the midrange in or did it come stock?
     
  11. drpepper

    drpepper Supporting Member

    Jul 20, 2009
    Columbia, Maryland
    You had me at "Let me get this straight"...I think you've got it locked up
     
    Lasted edited by : Jan 31, 2015
    xbud and Scottkarch like this.
  12. xbud

    xbud Supporting Member

    Nov 9, 2012
    Southwestern, PA
    I had the cabinets for over a year before doing the mod....they were fine for the first 6 months as I wasn't playing out or practicing in a loud band at the time.

    I am well aware of the re-sale on these. The RH-750 head was gone in two days after I listed it.
     
  13. xbud

    xbud Supporting Member

    Nov 9, 2012
    Southwestern, PA
    i put the midrange in it, as the tweeter was a little much .
     
  14. BassmanPaul

    BassmanPaul Gold Supporting Member

    Aug 25, 2007
    Toronto Ontario Canada
    But your cabinets are no longer TCE products unless you plan to un-fix them before resale.

    Drpepper I asked the OP a reasonable question which he answered in a reasonable fashion.
     
    Lasted edited by : Jan 31, 2015
  15. Chef

    Chef Moderator Staff Member Supporting Member

    May 23, 2004
    Columbia MO
    Disclosures:
    Staff Reviewer; Bass Gear Magazine
    Mod Insert:
    you kids play nice in here now, ya hear...thanks.
     
  16. cfsporn

    cfsporn Supporting Member

    Aug 20, 2011
    New York City
    Cool. I'd be interested in hearing your thoughts about the upgrade process and before/afer sound.
     
  17. xbud

    xbud Supporting Member

    Nov 9, 2012
    Southwestern, PA
    There wasn't much to it, I used a 4.5" Galaxy (Closed Back) 8 Ohm mid-range to the replace the 8 ohm Tweeter. The issue is there is no tweeter control on theses cabinets and I wasn't able to turn down some of the high range. To tell you the truth, I disconnected the tweeter and was just as happy with that. The addition of the mid-range didn't add any value to the sound. If I was to do it again, I would just leave the tweeter in and disconnect it. The drivers that TC Electronics put in were better suited for mid-range to begin with.
     
  18. CaneyBoniface

    CaneyBoniface

    Feb 17, 2015
    Malaysia
    do you replace the original drivers on your BC210?