Thiele-Small Parameters for MW6500 Drivers

Michael8itMichael8it Posts: 193
edited July 2012 in Vintage Speakers
I have some spare parts laying around and am interested in building a center channel speaker using these old components. Does anyone know the Thiele-Small parameters for MW6500 drivers? These would be needed to know what size port to put in the box.

The parts I would like to use:

1 Peerless Tweeter
2 MW6500 drivers
RTA12 or 12B (top) Crossover.

Due to size requirements, the box need to be ported, not sealed, which is why I need the specs.

Thanks!
Carver C-1, M-500 MKII, Yamaha HTR-5835, Polk RTA 12BM's (M-for mod'd).
Post edited by Michael8it on

Comments

  • westmassguywestmassguy Posts: 6,044
    edited July 2012
    Michael8it wrote: »
    I have some spare parts laying around and am interested in building a center channel speaker using these old components. Does anyone know the Thiele-Small parameters for MW6500 drivers? These would be needed to know what size port to put in the box.

    The parts I would like to use:

    1 Peerless Tweeter
    2 MW6500 drivers
    RTA12 or 12B (top) Crossover.

    Due to size requirements, the box need to be ported, not sealed, which is why I need the specs.

    Thanks!
    Got these from various sources, including Club Polk, props to the original posters:

    Driver: MW 6500 Driver's model #.
    Brand: Polk Driver's brand name.
    Fs: 31.0000 Hz (Free air resonance)
    Vas: 2.6486 ft^3 (Compliance volume)
    Qts: 0.2190 Total Q
    Qms: 1.3000 Mechanical Q
    Qes: 0.2640 Electrical Q
    Sd: 0.0130 M^2 (Piston area)
    Xmax: 3.1800 mm (Cone excursion, linear)
    Revc: 6.5000 ohms (DC resistance)
    Znom: 8.0000 ohms (Nominal impedance)
    Pmax: 35.0000 watts maximum rated power


    Driver: MW 6501 Driver's model #.
    Brand: Polk Driver's brand name.
    Fs: 31.0000 Hz (Free air resonance)
    Vas: 2.7545 ft^3 (Compliance volume)
    Qts: 0.2790 Total Q
    Qms: 1.4700 Mechanical Q
    Qes: 0.3440 Electrical Q
    Sd: 0.0130 M^2 (Piston area)
    Xmax: 3.1800 mm (Cone excursion, linear)
    Revc: 7.7500 ohms (DC resistance)
    Znom: 8.0000 ohms (Nominal impedance)
    Pmax: 35.0000 watts maximum rated power


    Driver: MW 6502 Driver's model #.
    Brand: Polk Driver's brand name.
    Fs: 44.0000 Hz (Free air resonance)
    Vas: 1.2360 ft^3 (Compliance volume)
    Qts: 0.2790 Total Q
    Qms: 1.9700 Mechanical Q
    Qes: 0.3250 Electrical Q
    Sd: 0.0130 M^2 (Piston area)
    Xmax: 3.1800 mm (Cone excursion, linear)
    Revc: 3.5200 ohms (DC resistance)
    Znom: 4.0000 ohms (Nominal impedance)
    Pmax: 35.0000 watts maximum rated power


    Driver: MW 6503 Driver's model #.
    Brand: Polk Driver's brand name.
    Fs: 29.8600 Hz (Free air resonance)
    Vas: 3.0017 ft^3 (Compliance volume)
    Qts: 0.3100 Total Q
    Qms: 1.7680 Mechanical Q
    Qes: 0.3760 Electrical Q
    Sd: 0.0130 M^2 (Piston area)
    Xmax: 3.1800 mm (Cone excursion, linear)
    Revc: 6.5400 ohms (DC resistance)
    Znom: 8.0000 ohms (Nominal impedance)
    Pmax: 35.0000 watts maximum rated power

    Driver: MW 6517
    BrandL Polk Audio
    * Size / Type = 6.50" treater paper cone woofer
    * SPL = 91 db @ 1w/1m
    * Wattage = 125 Watts RMS / 250 Watts Peak
    * Treated cone woofer, rubber surround
    * Response = 40 Hz. to 10 kHz.
    * Weight = Right a 4 pound ea.
    * Magnet = UnShielded
    * VC = 1" ( 25 mm)
    * Ohms = 4 ohms
    * f(s) - 55 Hz.
    * Q(ms) - 7.261
    * V(as) - 14.60 liters ( 0.516 cf. )
    * n(0) - 5.02%
    * M(ms) - 18.38 grams
    * R(e) - 1.86 Ohms
    * Q(es) - 0.048
    * SPL - 92 dB @ 1W/1m
    * C(ms) - 0.44 mm/N
    * Z(max) - 281.50 Ohms
    * Q(ts) - 0.048
    * L(e) - 31.08 mH
    1 Driver Type Q BL Compliance DC Resistance Fs

    3 MW 6501 1.470 5.96 N 3.250 E - 3N/M 7.750 Ohms 31 Hertz
    4 MW 6502 1.970 5.16 N 1.470 E - 3N/M 3.520 Ohms 44 Hertz
    5 MW 6503 1.820 5.24 N 3.550 E - 3N/M 6.540 Ohms 29 Hertz
    6 MW 6509 2.100 4.57 N 3.540 E - 3N/M 8.970 Ohms 30 Hertz
    7 MW 6510 1.390 6.32 N 3.410 E - 3N/M 6.570 Ohms 31 Hertz
    8 MW 6511 1.405 4.34 N 3.496 E - 3N/M 3.130 Ohms 29 Hertz
    9 MW 6512 1.905 4.99 N 1.588 E - 3N/M 3.466 Ohms 40 Hertz
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/
    Exclusive Distributor of Gimpod's Custom SDA Circuit Boards

    "And keep her under 70, would you, huh? Betty likes a slow ride"
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