Update: This popular deal is still available.
Adorama has
Definitive Technology Demand D15 Speakers (Pair, Black or White) on sale for
$499.
Shipping is free (select free shipping during check out).
Thanks to Deal Editor
iconian for sharing this deal.
Available Colors:
Key Details: - Proprietary Drivers detailed, balanced audio
- Tweeters - Clear, Precise Highs
- Midrange - Superior Detail & Natural Midrange
- Woofers - Deeper, Cleaner Bass
- Dual 8" Passive Bass Radiators for visceral bass response
- Audiophile-Quality Crossovers for beautifully balanced audio
- Linear Response Waveguide for natural, precise imaging
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Top Comments
Most of the midrange roughness in the D11 is most likely from a resonance in the passive radiator.
This is probably not present in the D15 since the design is different & the woofers which drive the passive radiators do not receive frequencies high enough to excite a resonance in the midrange.
Audioholics published very detailed, well acquired, test results for this speaker, the D15. No reason to imagine what they measure like.
https://www.audioholics
'upgrading' any driver in these will require reworking the crossover. That will be more important than anything else.
You would need to be able to measure very accurately in multiple ways and understand how to design a complex, driver specific, 3-way passive crossover. This is very difficult to do well even for very advanced hobbyists. Expect to spend significant time and resources and get a lot of help from the forums & books and getting lucky to have any chance of an improvement. Really not saying this in a condescending way, sure it might sound better to you if you slap a beryllium tweeter in there and call it done but yah it really won't be.
If you follow ASR you know even long standing companies like GR research, PartsExpress, and DIY groups using expensive Purifi drivers in custom designs have failed to impress more often than not. Heck loads upon loads of companies from entry to very high end price wise have struggled to pull off an objectively good design, even when factoring in for a wide subjective preference.
Honestly, instead of butchering the D15, I'd recommend you buy some sort of 'PEQ' and learn what can and can't be done tailoring the sound with that(big learning curve but worth it) and play around with it.
Also buy a simple 2-way DIY kit that sounds good but has some notable 'upgrade' paths and spend some time putting it together and then reworking the crossover and driver swapping in that to start to lean what goes into the situation. Who knows someday you may be a designer.
Also taking the 1/4" aluminum face off the D15 to get to the drivers is not for the faint of heart. It will not come off easily. I have taken one off a D9, it was a situation.
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Go buy a timeshare if you like sales pitches instead of deals.
You will be happier and all the people tired of hearing the complaints and appreciate saving money at ZERO COST TO THEM will be happier too 👍🏼
* In case anyone was wondering, these do have magnetic grilles (not show in the Adorama listing).
* In my opinion, these will perform more neutral, and hence more audiophile like, than anything in the Klipsch line. With that said, a lot of folks like the Klipsch frequency response--the Klipsch sound.
* I don't really see the point of these primarily for HT use. You're going to have subs for HT. Bookshelves or other options are fine for L & R. This pair would be better for a stereo listening environment.
* These are a 3-way speakers. The tweeter, woofers, and radiators all seem to perform admirably. The mid-range, which is very key, appears to be somewhat problematic on this speaker and may explain some of the selling problems. ASR reviewed the D11, which is the same tweeter with the same midrange driver (midrange also does double-duty as the woofer in the D11), and the midrange looked pretty rough for the mid-range frequency range--too much distortion. It really performs very distored covering the bass range, which, thankfully, you don't have to worry about on this tower.
* This speaker has a nice cabinet and would be a nice project speaker to upgrade the midranges and possibly even the tweeters.
* Inventory (12/2 @ 9 PM): 230 white pairs; 105 black pairs.
* Thinking there is some chance to get this for $399 or $449 before year-end. I can't see them going much lower--seems like they'd come close to losing on shipping. At that price, I might go for the midrange project approach.
Open up a deals site and run it on donations. Be my guest.
If it wasn't for the paid stuff and adds this site would not be running at all.
And as the poster said who cares as long as the deal is a legit company & good price.
Our community has rated this post as helpful. If you agree, why not thank ROOSKIE
* These are a 3-way speakers. The tweeter, woofers, and radiators all seem to perform admirably. The mid-range, which is very key, appears to be somewhat problematic on this speaker and may explain some of the selling problems. ASR reviewed the D11, which is the same tweeter with the same midrange driver (midrange also does double-duty as the woofer in the D11), and the midrange looked pretty rough for the mid-range frequency range--too much distortion. It really performs very distored covering the bass range, which, thankfully, you don't have to worry about on this tower.
* This speaker has a nice cabinet and would be a nice project speaker to upgrade the midranges and possibly even the tweeters.
Most of the midrange roughness in the D11 is most likely from a resonance in the passive radiator.
This is probably not present in the D15 since the design is different & the woofers which drive the passive radiators do not receive frequencies high enough to excite a resonance in the midrange.
Audioholics published very detailed, well acquired, test results for this speaker, the D15. No reason to imagine what they measure like.
https://www.audioholics
'upgrading' any driver in these will require reworking the crossover. That will be more important than anything else.
You would need to be able to measure very accurately in multiple ways and understand how to design a complex, driver specific, 3-way passive crossover. This is very difficult to do well even for very advanced hobbyists. Expect to spend significant time and resources and get a lot of help from the forums & books and getting lucky to have any chance of an improvement. Really not saying this in a condescending way, sure it might sound better to you if you slap a beryllium tweeter in there and call it done but yah it really won't be.
If you follow ASR you know even long standing companies like GR research, PartsExpress, and DIY groups using expensive Purifi drivers in custom designs have failed to impress more often than not. Heck loads upon loads of companies from entry to very high end price wise have struggled to pull off an objectively good design, even when factoring in for a wide subjective preference.
Honestly, instead of butchering the D15, I'd recommend you buy some sort of 'PEQ' and learn what can and can't be done tailoring the sound with that(big learning curve but worth it) and play around with it.
Also buy a simple 2-way DIY kit that sounds good but has some notable 'upgrade' paths and spend some time putting it together and then reworking the crossover and driver swapping in that to start to lean what goes into the situation. Who knows someday you may be a designer.
Also taking the 1/4" aluminum face off the D15 to get to the drivers is not for the faint of heart. It will not come off easily. I have taken one off a D9, it was a situation.
'iconian' is a very well known staff member & specifically posts many of the Adorama deals.
I assume every staff post is a paid promotion.
Some companies shill their own products via self promotion, that wouldn't be Slickdeals fault.
In any case I get that ideally we'd somehow all have high level ethics and agree on what is truly right and be super clear, honest, transparent. That said, without going too far , what does it look like ethically when we pile up the SDs while millions of kids fall far short of 3 squares? The ethics rabbit hole is deep, wide and has proven impossible terrain for human consensus. I'm not saying slickdeals should do whatever they want but this is buisness, Bestbuy doesnt lay out for me where all there money comes from and goes to. I think SD noting the poster is staff is enough.
I haven't heard these speakers and have no idea how resolving they are, but if you want more power than the Wiim amp, then you are kinda stuck with a dedicated amp/receiver and a Wiim mini/pro/streaming receiver as the option.
https://darko.audio/2023/11/wiim-...for-money/
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https://darko.audio/2023/11/wiim-...for-money/
I haven't heard these speakers and have no idea how resolving they are, but if you want more power than the Wiim amp, then you are kinda stuck with a dedicated amp/receiver and a Wiim mini/pro/streaming receiver as the option.
I watch him but could ultimately care less what Darko thinks the subjective sound is though. 100% of his income directly & indirectly comes from having a strong subjective opinion and then getting more gear to try directly from manufactures, NOT from consumers or personal purchases. That is fine but know that, he is cool entertainment and he is a shill.
Unless there is a design flaw this WiiM should be fine for just about everyone who doesn't play loudly in a larger room. Note these speakers do have lowish(for a tower) sensitivity at 85db
I'd like to see an independent test of the power output, though so far I trust WiiM. That said there have been some lemons from other decent brands tested on a regular basis.
If anyone wants more power than 60-8ohm/120-4ohm bear in mind that at least doubling the power would be the best next stop.
Going from 60 watts to 90 watts is almost no meaningful gain in total output capability.
If 60 isn't enough you really want to jump to say 150 or 200. Doubling power output is a 3db gain which is enough to just start being meaningful for extra $$, so you can see that less than that is not much gain nor worth it.
"Definitive Technology specifies the impedance load of the D15s to be 8 ohms nominal, but I would call that a stretch. They have a 5.4 impedance minima at around 130 Hz. That is too low in a heavily used region for these to fairly claim an 8-ohm load. The phase angle in that region isn't totally benign as well. If Definitive Technology claimed 6 ohms nominal, I wouldn't argue, but 8 is a stretch. Nonetheless, this isn't an extremely harsh electrical load. I wouldn't want to run these speakers on a budget AVR amplifier, but I think midrange AVR's should be able to handle these speakers without much trouble. I measured sensitivity at 84.7 dB for 2.83v at 1 meter which is pretty close to Definitive Technology's spec of 85.5 dB for 1 watt at 1 meter."
"Definitive Technology specifies the impedance load of the D15s to be 8 ohms nominal, but I would call that a stretch. They have a 5.4 impedance minima at around 130 Hz. That is too low in a heavily used region for these to fairly claim an 8-ohm load. The phase angle in that region isn't totally benign as well. If Definitive Technology claimed 6 ohms nominal, I wouldn't argue, but 8 is a stretch. Nonetheless, this isn't an extremely harsh electrical load. I wouldn't want to run these speakers on a budget AVR amplifier, but I think midrange AVR's should be able to handle these speakers without much trouble. I measured sensitivity at 84.7 dB for 2.83v at 1 meter which is pretty close to Definitive Technology's spec of 85.5 dB for 1 watt at 1 meter."
IMHO ppl should only consider adding power when they sense a lack of power. That could be an amp shutting down, change in tone from speakers as the volume increases, or audible distortion.
IMHO ppl should only consider adding power when they sense a lack of power. That could be an amp shutting down, change in tone from speakers as the volume increases, or audible distortion.
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