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Thread: 12" Full Range Driver

  1. #1
    Join Date: Aug 2016

    Location: Sussex, UK

    Posts: 116
    I'm Martin.

    Default 12" Full Range Driver

    Hi All,

    Found this FR 12" driver on the nevernet the other day.

    Be interested in any comments on the Freq Curves and Specs.

    I have ordered two pairs in via air freight. These units are $22USD each direct from works. I will let you know what they sound like if interested. BR Martin

    GENERAL SPECIFICATIONS
    Nominal diameter 305(12) mm (in.)
    Nominal impedance 8 Ω
    Minimum impedance 5.8 Ω
    Program power (1) 300 W
    AES Power rating(2) 150 W
    Sensitivity (3) 97.5 dB
    Frequency range 74 ~ 16000 Hz
    Voice coil diameter 50(2) mm (in.)
    Chassis material Steel
    Magnet material Ferrite
    Magnet dimensions (ODxIDxh) 156 x 80 x 20 mm
    Coil material CCAW
    Former material Glass Fiber
    Xmax(4) 3 mm
    Xmech(5) 7 mm
    Gap height 8 mm
    Voice coil Wingding height 10 mm

    SMALL SIGNAL PARAMETERS
    DC resistance(Re) 5 Ω
    Resonance frequency(Fs) 74 Hz
    Moving mass(Mms) 32 g
    Compliance(Cms) 0.14 mm/N
    Force factor(BL) 11 N/A
    Mechanical Q-factor(Qms) 6.5
    Electrical Q-factor(Qes) 0.77
    Total Q-factor(Qts) 0.69
    Equivalent air volume(Vas) 62 I
    Voice coil Inductance(Le) 0.70 mH
    Diaphragm area(Sd) 533 cm2
    Reference efficiency(Eta O) 3.2 %
    Attached Images Attached Images

  2. #2
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 36,217
    I'm Geoff.

    Default

    Are you planning to use a subwoofer with these?

  3. #3
    Join Date: Aug 2016

    Location: Sussex, UK

    Posts: 116
    I'm Martin.

    Default

    Yes Geoff, a BK. Martin

  4. #4
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 36,217
    I'm Geoff.

    Default

    Ah.

    I've been looking at larger full range drivers myself. Some interesting stuff about.

  5. #5
    Join Date: Mar 2008

    Location: Dunfermline, Scotland, UK

    Posts: 12,392
    I'm inthescottishmafia.

    Default

    Geoff, have a look at the Fane 12-250c if you haven’t already. There is also a 15” version.

    I’ve also been very impressed recently with a Monacor 10” coax unit, the SP310 CX, used in an OB with a couple of their 15” PA drivers.
    “Music has always been a matter of energy to me, a question of fuel. Sentimental people call it inspiration, but what they really mean is fuel. I have always needed fuel. I am a serious consumer. On some nights I still believe that a car with the gas needle on empty can run about fifty more miles if you have the right music very loud on the radio”

    Hunter S Thompson

  6. #6
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 36,217
    I'm Geoff.

    Default

    OK Ali.

  7. #7
    Join Date: Apr 2011

    Location: cheltenham

    Posts: 396
    I'm matt.

    Default

    $22? Is that a typo?

    Frequency response looks a bit too good to be true. In a real baffle I'd expect It to look rather different (download 'The Edge' to see what It would most likely look like In your chosen baffle size).

    Saying that, got to be worth a try for the money.

  8. #8
    Join Date: Aug 2016

    Location: Sussex, UK

    Posts: 116
    I'm Martin.

    Default

    NO. $22USD!

  9. #9
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 36,217
    I'm Geoff.

    Default

    Quote Originally Posted by Dylanthecat View Post
    NO. $22USD!
    That's certainly damn cheap Martin.

    I've had my eye on these from China: https://nl.aliexpress.com/item/Aucha...734357597.html

    Specs look good, useable output down to 30Hz or below by the look of it. Cloth surrounds too.

  10. #10
    Join Date: Nov 2008

    Location: Valley of the Hazels

    Posts: 8,439
    I'm AMusicFanNotAnAudiophile.

    Default

    Quote Originally Posted by Dylanthecat View Post
    Hi All,

    Found this FR 12" driver on the nevernet the other day.

    Be interested in any comments on the Freq Curves and Specs.

    I have ordered two pairs in via air freight. These units are $22USD each direct from works. I will let you know what they sound like if interested. BR Martin

    GENERAL SPECIFICATIONS
    Nominal diameter 305(12) mm (in.)
    Nominal impedance 8 Ω
    Minimum impedance 5.8 Ω
    Program power (1) 300 W
    AES Power rating(2) 150 W
    Sensitivity (3) 97.5 dB
    Frequency range 74 ~ 16000 Hz
    Voice coil diameter 50(2) mm (in.)
    Chassis material Steel
    Magnet material Ferrite
    Magnet dimensions (ODxIDxh) 156 x 80 x 20 mm
    Coil material CCAW
    Former material Glass Fiber
    Xmax(4) 3 mm
    Xmech(5) 7 mm
    Gap height 8 mm
    Voice coil Wingding height 10 mm

    SMALL SIGNAL PARAMETERS
    DC resistance(Re) 5 Ω
    Resonance frequency(Fs) 74 Hz
    Moving mass(Mms) 32 g
    Compliance(Cms) 0.14 mm/N
    Force factor(BL) 11 N/A
    Mechanical Q-factor(Qms) 6.5
    Electrical Q-factor(Qes) 0.77
    Total Q-factor(Qts) 0.69
    Equivalent air volume(Vas) 62 I
    Voice coil Inductance(Le) 0.70 mH
    Diaphragm area(Sd) 533 cm2
    Reference efficiency(Eta O) 3.2 %
    I'd be a bit wary about the coil material - it's copper coated aluminium wire, and aluminium wire isn't exactly known for its tensile properties.
    I certainly dislike CCA network cable, and refuse to touch it. It fails to achieve the Cat5e standard.
    Chris



    Once we've made sense of our world, we wanna go fuck up everybody else's because his or her truth doesn't match mine. But this is the problem. Truth is individual calculation. Which means because we all have different perspectives, there isn't one singular truth, is there?

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