Replacement tweeter needed...

Discussion in 'Home Theater Projects' started by nate-r, Nov 27, 2003.

  1. nate-r

    nate-r Auditioning

    Nov 26, 2003
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    I have an RA Labs (RDL Acoustics) center channel speaker, and from what I can tell the tweeter is blown on it. RA Labs/RDL is long out of business, but from what I've gathered, they used fairly standard OEM parts.

    The tweeter is a 1" (25mm) copolymer design, with a rectangular plastic mount. Here are the specs on the center channel speaker as a whole:

    Low Frequency Response --
    -3dB at 55 Hz
    -8dB at 39 Hz

    Crossover Frequency -- 3 kHz
    Impedance -- 6 ohms
    Sensitivity -- 89 dB SPL
    Amplifier Power -- 15 to 100 Watts
    Dimensions -- 7" x 20½" x6½"
    (178 mm x 521 mm x 165 mm)
    Weight -- 10 pounds each ( 4.5 kg)

    I don't know too many places to get a tweeter from, but seems to have a few that might work. The DAYTON 1/2" SHIELDED MYLAR DOME TWEETER looks almost identical to the RA Labs tweeter, though it's stats are different than the RA Labs speaker as a whole:

    Mylar dome tweeter features a fully shielded magnet structure for audio/video applications. Ferro fluid cooled * Power handling: 30 watts RMS/45 watts max * Voice coil diameter: 1/2" * Impedance: 8 ohms * Frequency response: 5,000 - 20,000 Hz * Magnet weight: 1/2 oz. * Fs: 2,600 Hz * SPL: 90 dB 1W/1m * Net weight: 2 oz. * Dimensions: A: 3-1/2" x 2-1/2", B: 1-15/16", C: 7/8", D: 1-7/16", E: 5/8".

    I'm not sure if the GOLDWOOD GT-336 1" TITANIUM DOME TWEETER 4-1/2"x3-1/2" would physically fit or not, but the specs seem closer:

    All of these tweeters feature a 1" pure titanium dome with a phase shield to provide a controlled high frequency roll off. * Power handling: 45 watts RMS/65 watts max * Voice coil diameter: 1" * Impedance: 8 ohms * DC resistance: 6.8 ohms * Frequency response: 3,500-20,000 Hz * Magnet weight: 8.5 oz. * Fs: 1,500 Hz * SPL: 90 dB 1W/1m * Net weight: 1-1/8 lbs.

    How close do the specifications of the tweeter need to be to match the speaker? Are those good tweeters? Where else can I get a tweeter?

    Any help greatly appreciated!
  2. Jeff Stiger

    Jeff Stiger Extra

    Jul 23, 2002
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    Might want to try MWA speaker parts.
    Can't post links yet, but try:

  3. ThomasW

    ThomasW Cinematographer

    Nov 6, 1999
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    I'd contact Roy Allsion and ask him for suggestions.

    Unless you want to completely rebuild the crossover you shouldn't get a Parts Express tweeter.

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