Sold (20) 6 inch drivers for line arrays: $95+sh

Fast1one
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Im thinking I want to go back to point source loudspeakers to save some space (college student). These were used in an open baffle line array and recieved on the order of 1-2 watts a piece at maximum.

"Acoustic Research" brand

Specifications: *Power handling: 50 watts RMS/75 watts max *VCdia: 1" *Le: .77 mH *Impedance: 8 ohms *Re: 7.5 ohms *Frequency range: 40-4,500 Hz *Fs: 40 Hz *SPL: 85 dB 1W/1m *Vas: 1.57 cu. ft. *Qms: 5.07 *Qes: 1.41 *Qts: 1.10 *Xmax: 6.5 mm *Dimensions: Overall diameter: 6-5/8", Cutout diameter: 5-1/2", Mounting depth: 3-7/8".

From the specs you can see these are perfect for open baffle with a high QTS, or in a sealed box.

When I started using them I noticed the foam surrounds were very brittle. I added a bead of PVA glue around the surround so it wouldn't come off the frame, and two medium coats of "Modgepodge" on the cones and surrounds to protect them. I originally had 24 of them, but I was only able to save 20. Keep in mind the drivers have more control now (QTS was effectively lowered) since I applied the cone treatments (stiffer).

These have great extention down to about 50-60hz open baffle, with usable output down lower. I would reccomend crossing them over with a tweeter array around 3khz or lower and highpassing them around 80hz with a dedicated substage if you want to approach live levels open baffle. Do 5 cubes per side sealed for extension down to 50hz and high power handling.

Asking $95 USD plus shipping OBO for all twenty. Using something like the ApexJr. (apexjr.com) tweeter at 50 cents each would yeild a very affortable line array.

These aren't the best sounding speakers in the world. But since they are used in multiples, I got fairly acceptable sounding line arrays. Wonderful dynamics and a huge stage. Great for those who want to explore this option without spending hundreds.

The other four are still mounted on the line arrays in the pictures. I have since thrown them out and was going to condense the line arrays to 5.5-6 feet tall (And less wide) but I decided against it.

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I don't really want to break them up...

As far as loud, they could get painfully loud with 30 watts per side. Enclosed they would have a lot more headroom as far as excursion goes...

Keep in mind, line arrays (when kept within nearfield distance, so like under 10 feet typically) only lose 3DB for doubling of distance as opposed to 6DB for regular speakers. So not only are these fairly efficient (expect 95DB per side) they are also louder inherently at the listening position...

 
BTW, if I can have two buyers lined up I will split the speakers 50/50. Though 4-5 drivers per side will be far from ideal, you can get away with it if your listening distance is very close (for PC audio or the like)...

 
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Fast1one

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