Parts Express DLS 5.25" Cast Frame Woofs.. On Sale $6.00 each! (1 Viewer)

[Brett DiMichele]

Parts Express Deal Of The Day...




5.25" Cast Frame Woofer:

A superb 5-1/4" woofer that has the potential to make it into the Parts Express buyout hall of fame. The cast magnesium frame, good damping, and smooth response make this woofer competitive with any 5-1/4" woofer on the market. Features: cast magnesium basket, straight profile textured homopolymer cone, soft butyl rubber dustcap, rubber surround, flat spider, and 1" 4-layer voice coil on an aluminum former. Works well in a .35 cu.ft. vented box with an F3 of 50 Hz, or a .15 cu.ft. sealed box with an F3 of 95 Hz. This woofer has "line array" written all over it. Limited quantities!
Specifications: * Power handling: 75 watts RMS/100 watts max. * Voice coil diameter: 1" * Nominal Impedance: 4 ohms * Frequency response: 50-3,500 Hz * Magnet weight: 15 oz. * Fs: 50.1 Hz * SPL: 87 dB 2.83V/1m * Vas: .37 Cu. Ft. * Qms: 2.86 * Qes: .45 * Qts: 0.39 * Xmax: 2mm * Sd: 14.1 sq.in. * Net weight: 1.5 lb. * Dimensions: A: 5-3/4" x 5-1/8", B: 4-3/4", C: 2-3/8", D: 2-3/4", E: 1".
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$6.00ea

http://www.partsexpress.com/pe/pshow...fer=dotd052703

 

[Tommy T]

Any ideas on these being a "drop in" or substitute for any of the already proven DIY kits out there? I've been thinking about building some MTM's and was wondering if these would fit the bill and if so, what design?

I've looked at the Audax system and really like it but was trying to go a little cheaper on my first go around.

Thanks in Advance,

Tommy

 

[Allen Ross]

i'll take a gross now someone got some cash they can lone me?

 

[Pete Mazz]

From the looks of the surround you'd think it'd have more than 2mm Xmax. Other than that, it looks pretty nice.

Pete

 

[Chris Tsutsui]

I saw these the other day.

Looks like it wouldn't be fun trying to flushmount one of those, but I guess you wouldn't have to.

I've been thinking of getting some mid range drivers for my car and these certainly fit the bill. Now if I could just find a cheap tweeter for them.

Maybe I'll be the first kid on my block with a pair of line arrays in my SUV.

 

[Brett DiMichele]

Tommy,

I have no clue what these would be a drop in for. I merly
posted this for someone looking to pick up some bulk mids
for a Line Array project. Anyone looking at buying 16 or
so mids certainly would love a bargain I am sure.

I bet these could be good substitutes for certain proven
designs but you would need to do some research on that.

 

[VinhT]

Quite a bargain I'd say. The frequency response provided by Parts Express is impressive. The peak right before the natural roll-off won't be difficult to tame for experienced crossover designers.

 

[Rory Buszka]

I have a design using the Seas H537 tweeter as well (both the 299-706 woofer and Seas H537 tweeter were part of a buyout from Definitive Technology. This is the same driver that is used in the BP8.

(you really get a feel for how much Deaf Tech fudges their specs when you see that the BP8 supposedly can hit 22Hz but the woofer used is only flat down to 50 Hz. These drivers do have a lot of bass, though.)

When you look at the driver straight-on, you see the surround really isn't all that big. It's just the way PE takes the picture. The drivers are handsome, though, and have good resolution through the midbass.

Here is the design: http://newfoundrory4.tripod.com/biam...projectmtm.htm

My design uses two of these woofers and a Seas H537 tweeter that is no longer available. You can substitute any 8-ohm tweeter that can go down to 2500 Hz with an alternate crossover design that uses 4 uF capacitors substituted for both C1 and C2 and 1 mH inductors substituted for both L1 and L2. I expect good results can be had with the Dayton silk-dome and this crossover, though the L-pad figures will need to be re-calculated to figure for the different tweeter.

 

[Brett DiMichele]

Rory,

Doesn't Def use an 8" Woof in the BP8 for the lows? I am not
real familiar with Def Tech stuff but I am sure they could
load the woofer to somehow get lower than it's 50Hz Linear
Range (Slot Loading, Transmission line etc) but that's a
band aid way to get low output out of a driver that isn't
meant for it..

 

[Jonathan_D]

Well, from what I can ascertain, the BP8 uses two 14cm drivers, which translates into 5.5 inches.

BTW, PE has these drivers for $8.90 now. Not as good as the earlier $6 price, but still not bad for someone wanting to do a bargain MTM design. I would think the Dayton 1 1/8 inch tweeter would work fairly well with it with the right crossover (easy for me to say ).

 

[Rory Buszka]

"...with the proper crossover..."

I just detailed the proper crossover above for using the Dayton 1-1/8" silk dome tweet. Simply substitute 4uF capacitors for C1 and C2, and subtitute 1mH inductors for L1 and L2, using a second-order crossover design. The result is a crossover point at 2500 Hz, with 12dB/Octave rolloff, Linkwitz-Riley topology.

 

[Rory Buszka]

the other thing: The BP8 uses two 5.25" woofers, no subwoofers, and a transmission-line loading.