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Discussion Starter · #1 · (Edited)
12IB4 pair new but do have some small scratches on magnet as seen in pics. I bought these years ago from someone closing a shop who had them in the back. $150 shipped

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JL 300/4 Used. Tested and works fine. Some minor scratches on top, worst by second screw from right heatsink side. I tried to capture, but really looks pretty good. $150 shipped - SOLD


JL 300/2 Used. Tested and works fine. Some scratches by the LEDs on top. Worse than the 300/4 but still very nice shape. $150 shipped - SOLD


Will do $280 shipped for both amps.
 

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wow, exactly what I needed 2 weeks ago. and a fantastic price. you should have no problem selling these.
 

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nice prices
 

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Discussion Starter · #5 ·
300/4 sold

Everything else still available.
 

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Discussion Starter · #6 ·
Both amps sold.

12IB4s still available.

Where were you guys when I was trying to sell my Morel 3-ways LOL?
 

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****...where were you last week...?
 

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Are the JL's 4ohm or 8ohm?
 

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Discussion Starter · #14 · (Edited)
WRX is right, all IB4s are 8 ohms. But they are 92dB efficient, and only need 100W or so to drive. Wire them inparallel and drive them with a 250W amp and you are rocking.

Specs from JL
Free Air Resonance (Fs): 40.5 Hz
Electrical “Q” (Qes): 0.673
Mechanical “Q” (Qms): 10.967
Total Speaker “Q” (Qts): 0.634
Equiv. Compliance (Vas): 3.97 ft³ 112.4 litres
(Xmax)* One-way, Linear Excursion: 0.29 in 7.3 mm
Efficiency (1W/1m)**: 92.2 dB
Effective Piston Area (Sd): 78.5 in² .0506 m²
DC Resistance (Re): 6.07Ω
Nominal Impedance: 8Ω
Power Handling (continuous): 125W
Mounting Depth: 5.5 in 140 mm
Mounting Hole Diameter: 11.0625 in 281 mm
Driver Displacement: 0.06 ft³ 1.696 litres
 

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Discussion Starter · #15 · (Edited)
Double post feature
 

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Uhm.... What?
Eminence..the OEM speaker manufacturer. They made JL's from this era...and that's a good thing. I'm an old school guy, Eminence and Credence were responsible for 95% of the USA made car audio subs back in the day.

Didn't mean to hijack the thread. These JL's are sweet though.
 

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Eminence..the OEM speaker manufacturer. They made JL's from this era...and that's a good thing. I'm an old school guy, Eminence and Credence were responsible for 95% of the USA made car audio subs back in the day.

Didn't mean to hijack the thread. These JL's are sweet though.

Hmmm... are you sure about this? I was under the impression that JL was always it's own buildhouse as far as subwoofers were concerned. I know back in the day when I worked for a dealer, I sat through many trainings showing their facility, and the people that built their woofers.

Was the IB4 the only one made by Eminence?

JL History as I remember it: JL Audio :: Brands :: Home

Sorry to threadjack Jimbno1... free threadjack bump. :rolleyes:
 
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