Sounds good. Is that a 2-way crossover or just a high pass for the ASD1001 and do you know what frequency those ports are tuned to?
Enjoy the benefits of a premium membership!
Upgrade Account
-
TalkBass has been independent since 1998. Add your voice.
Create a free account to reply to discussions, view embedded media, and browse with fewer display ads.
Join free Log in
Want zero display ads or expanded classifieds tools? Compare plans.
Kappalite coaxials!!
- Thread starter DukeLeJeune
- Start date
Doug Parent
Supporting Member
Well I'm using a Crown XLS Drivecore 1500 power amp with built in two-way (DSP) 4th order internal crossover. Last night I was experimenting with lower crossover frequencies, and 2.24 kHz sounded the best to my ears. The cabinet is actually closer to 3.0 cft not 2.75. Two 4 X 10 port tubes. Don't know what frequency the cab is tuned to, just installed the speaker as is. stock photo. edit just checked with [This invalid link has been removed] cabinet tuning appears to be 40 hz.
Attachments
Doug Parent
Supporting Member
Doug Parent
Supporting Member
Honestly it sounds better than expected. The lows are smooth and the low B up through lower mids are all there. The ASD1001 seems to shine in this role, and the sensitivity is more than adequate to keep up with the woofer.
It sounds like a boutique cabinet, especially for being a random throw-together affair.
Doug Parent
Supporting Member
Had a chance to really lean into it with a QSC GX5 today, a good clean 500 watts at 8 ohms. This may be the best thing I've played through in the last few years! Just trying to get the crossover frequency right before I pull the trigger on a two-way off the shelf crossover although I would gladly pay someone to make me one. I'm thinking 2.5khz is the sweet spot.
It’s fun hearing what lots of clean power can do. That driver can really move some air when pushed. You might want to consider the Eminence PXB2K6 at 2.6kHz. It’s a good match for that driver. I ended up just using the high pass section for the ASD1001 which kept the upper mids more prominent. A simple LPF jumper can be used for the option to either engage or bypass the woofer low pass. See agedhorse comment in Post #236.
Last edited:
Doug Parent
Supporting Member
That crossover is no longer available. This one only handles 250 watts though, seems I would need higher power handling?
PXB2:2K5CX - Crossovers | Eminence Speaker
Last edited:
That's a shame, I don't know why they discontinued it but looking at the components I wouldn't trust that 250 watt version. Recommended crossover for the ASD1001S is 18dB/[email protected].
https://www.parts-express.com/pedocs/specs/290-525--eminence-asd-1001-spec-sheet.pdf
It's easy enough and cheaper to make your own. Here is a 500 watt version which should work well with only $10 of parts (plus shipping & handling). Component tolerances are about 3% so this should get you quite close. To avoid inductive coupling make sure to have about 6-8" separation between the voice coils and inductor and orient the inductor at a right angle (not in-line) to the voice coils.
Last edited:
Doug Parent
Supporting Member
One thing I didn't address is tweeter protection and attenuation for level matching. Eminence uses these tweeter protection lamps in their crossovers which looks like a pretty good way to avoid smoking a HF driver. Just insert it before the HF driver positive lead to provide smooth 3:1 analog compression during input overload and if it blows you only change out a $7 bulb.
"Eminence PX:BULB Replacement Tweeter Protection Lamp for Crossover" from www.parts-express.com!
I've had good luck with this 100 watt L-pad for adjusting tweeter level. If you have a 1-1/4" Forstner bit to make a clean hole and don't mind a little minor surgery on the back of the cab to install this it's good to have.
"Eminence PX-LPAD Crossover L-Pad Attenuator" from www.parts-express.com!
Otherwise, most bass amp treble knobs are shelving controls around 4kHz which should act in similar fashion and save you the trouble.
Last edited:
Doug Parent
Supporting Member
Thanks for all that, how ironic it is that I remembered that I had a box of crossovers left over from past projects. I found a high pass, looks like 4th order, made by Ralph Patterson. Forgot I still had this. It came out of a bass cab with a tweeter in the 2.5khz range if I recall. I did have a question, because with the crossover mounted on the back panel of the cabinet, I realized one of the inductors is facing the same way, the same orientation as the tweeter/woofer voice coils. Do you think this will be a problem? I think if I mounted the crossover board on the bottom panel of the cabinet, both inductors should be at a right angle to the voice coils. Does that make sense?
Attachments
- Feb 12, 2006
- 60,952
- 5
- 220,597
- Disclosures
- Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
How does the tone compare to the bp122 or 1525; old kappalites? Until I saw the new CX's I had concluded the BP drivers offered the best price weight sound combo . . .
CX's priced at $250- I am pretty sure that's still true for me...
CX's priced at $250- I am pretty sure that's still true for me...
I recently picked up a Berg 112NXT which has amazing punch and clarity and can get really loud for a 112. I ran an impedance scan with DATS v3 and it looks to be tuned to 50 Hz (Fb).
It's got aggressive mids and highs which would work well in a loud, busy mix but I miss the more even mids and fatter tone of the KL3012CX-8 so I might build this and see which works better for me. I ran this by Jerry McNutt at Eminence as a medium vented design for 5-string bass and asked if there is anything he'd change. His answer was "Looks good to me. Make some saw dust then make some bass!" It can take full rated power down to low E at 41 Hz where it hits Xmax. The Eminence ASD1001 HF driver and PXB:3K5 high pass give smooth highs that aren't overpowering and I like the single point source this coax provides.
It's got aggressive mids and highs which would work well in a loud, busy mix but I miss the more even mids and fatter tone of the KL3012CX-8 so I might build this and see which works better for me. I ran this by Jerry McNutt at Eminence as a medium vented design for 5-string bass and asked if there is anything he'd change. His answer was "Looks good to me. Make some saw dust then make some bass!" It can take full rated power down to low E at 41 Hz where it hits Xmax. The Eminence ASD1001 HF driver and PXB:3K5 high pass give smooth highs that aren't overpowering and I like the single point source this coax provides.
Last edited:
