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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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.com/tower...demand-d15 [audioholics.com]
'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.
I've read that Audioholics review many times. I wish James Larson added distortion measurements as part of his reviews. It's one of the things I like better about Amir's reviews.
Although I have a lot of interest, I have no time for a project speaker. Thanks for adding some nails in that coffin
Does the D9 measure well; what were you attempting?
Do you think the subjective portion of JL's (Audioholics) review somewhat implies that distortion is controlled at higher output?
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Also I think it's pretty funny how you're criticizing someone who's been here way longer than you have and has already "saved people thousands" by all the deals that I've posted over the years. And I've definitely gotten my share of emails over the years asking to shill products for this and that because of it but I'd really rather not.
Also I think it's pretty funny how you're criticizing someone who's been here way longer than you have and has already "saved people thousands" by all the deals that I've posted over the years. And I've definitely gotten my share of emails over the years asking to shill products for this and that because of it but I'd really rather not.
If you don't like how this site is run, don't participate. Problem solved.
The length of time I've been here is irrelevant.
We've run out of real problems when we complain about how a FREE website that saves people money manages itself.
Are you a financial justice warrior? 🙄
If you don't like how this site is run, don't participate. Problem solved.
The length of time I've been here is irrelevant.
We've run out of real problems when we complain about how a FREE website that saves people money manages itself.
Are you a financial justice warrior? 🙄
Like I said I participate and contribute way more than you do. Just because someone likes and uses something doesn't mean they can't be critical of it.
And of course there are a lot of other things in life to complain about. This isn't really the forum to do that so don't know why you keep bringing it up.
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What I am looking: Airplay 2, Spotify Connect, Alexa Cast (for Amazon Music)...
The question is, I could go with a dedicated (and maybe old) receiver/amp plus a WiiM Mini to take care of all my streaming requirements above, or I could go with an all-in solution such as WiiM Amp.
Any suggestions? Any active deals?
https://slickdeals.net/share/android_app/fp/896659
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