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Hi All, I am going to do a little experimenting with an inexpencive speaker setup. Here is what I have. 2.1 cuft sealed cabs with the Dayton woofer (I have stromberg carlson full range in them now), The Dayton Waveguides with the Eminence driver on a tombstone board. I don’t know what crossover I should use as the horn driver is 103 db and the woof is 92 db. I want to cross them at 2500hz and for the time being won’t use a tweet. So what do you think? By the time I am done I’ll have $150.00 into them. Thanks for your opinion. Cheers.
Dayton DC300-8 12" Classic Woofer
Specifications: Power handling: 80 watts RMS/115 watts max * Voice coil diameter: 2" * Voice coil inductance: 1.80 mH * Impedance: 8 ohms * Re: 6.6 ohms * Frequency response: 28-2,500 Hz * Magnet weight: 30 oz. * Fs: 28 Hz * SPL: 92 dB 1W/1m * Vas: 5.11 cu. ft. * Qms: 2.94 * Qes: .42 * Qts: .37 * Xmax: 4.3mm * Net weight: 6 lbs. * Dimensions: Overall Diameter: 12", Cutout Diameter: 11", Mounting Depth: 5-1/4", Magnet Diameter: 4-3/4", Magnet Height: 1-3/8".
Eminence ASD1001S 1" HF Titanium Horn Driver
Specifications: * Power handling: 50 watts RMS (EIA426B specification, 2.5 kHz @ 18 dB) * Impedance: 8 ohms * Frequency range: 2,500-19,000 Hz * Sensitivity: 103 dB 2.83V/1m * Dimensions: 3.5" dia. x 2.42" depth.
• 1" exit HF screw-on driver, 1-3/8"-18 TPI
• Aluminum former with titanium diaphragm
Dayton H12RW 12" Round Waveguide
The Dayton Professional H12RW high frequency waveguide is precision molded from high-performance plastic, and has an industry-standard 1-3/8" x 18 TPI throat for mounting screw-on style drivers. It is designed to exhibit a nominal 75° conical-shaped coverage pattern, and will provide useful acoustical loading down to 1,200 Hz. Dimensions: 11-1/2" round x 5-1/4" deep.
• Uncolored, natural sound
• Precision molded from high-performance plastic
• Standard 1-3/8" x 18 TPI mounting for screw-on drivers
• Nominal dispersion pattern: 75° conical
• Recommended minimum crossover frequency of 1,200 Hz
• Threaded brass throat insert for extra durability
• Recommended crossover: 2.5 kHz, 18 dB/octave
Follow Ups:
You are using a tweeter on a horn, you won't need to add one. You will need to pad the HF by about 12 dB, a pair of L pads would be a good thing to get so you can adjust to taste. You won't have much in the low bass department unless you do plenty eq.
A simple 6dB (choke on the woofer, cap on the tweet) will probably work fine for the (too high) crossover point you have chosen.
.5 mH choke on the woofer, 8 uf capacitor on the tweet should be close to 2500 Hz.
Since you are using such a hot tweeter compared to the woofer, I'd suggest going lower, perhaps a .85 coil and 13 uf capacitor, for around 1500 hz, or 1.3 mH with 20 uf for 1K. A lower point will give a more uniform dispersion around the crossover, and probably have less distortion overall.
Have fun, like the look of those classic cabs.
Since you have the amps already, by all means go active. Used active crossovers are often far less expensive than decent passive components, and all you have to do to compare crossover points is spin a knob, far easier to dial in what you want.
You still will want to insure proper polarity, some active crossovers have a switch for this, otherwise just swap + for - on the HF. The polarity is correct when you have the loudest response at the crossover frequency.
Check your local Music Go Round, or whatever used source you like. The old Bi Amp brand bi-amp stereo crossovers sound pretty damn good, and go for like $25.
Then again, the Behringer digital units are around 3 bills new, the DBX Driverack around $500, so there are a lot of options that sound good and are cheap for whatever you think cheap is.
Thanks for the advice Weltersys! I really don't understand the electronics of the crossover. I do have a couple amps, would it be possible to bi-amp with out using a Rane or DBX type crossover? One amp is tube with about 10 wpc and the other is SS with 75 wpc and that might help balance out the big diff in sensitivity. Cheers.
You really do need some kind of crossover to level match and set the Xover point and slope...
Hi Jim, I just blew my Crown amp so I will be using a passive crossover and an L pad to pad down the horn. Cheers.
with 806 Altec their 12" waveguide needed some tailoring due to being ~ constant directivity - but that Eminence driver has more HF - thats a decent waveguideI couldn't sign in at fullranger.com to answer your Karlson question
indoors 806 (labeled 807- maybe was) on 12" Dayton waveguide - (lower 3 curves)
indoors Eminence HF driver on Silver Iris coax
No problem on the Karlson question. This is the way I am going for now. I might need a super tweeter but I will see after the speakers are up and running. Cheers.
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