The Tech Style > Top 10 > Definitive Technology Speakers Demand D15 Tower Review
Top 10

Definitive Technology Speakers Demand D15 Tower Review

Definitive Technology Speakers
Written by Mazhar

The distinction between both floor-standing Definitive technology speakers  is the D17 uses marginally bigger drivers that ought to give it a little more bass extension and marginally more dynamic selection. In for review now, we’ve got the D15.

The Demand towers are somewhat odd because they occupy a comparable price range as other floor-standing speakers out of Definitive Technology, especially the BP-9000 collection. It’s not often that loudspeaker manufacturersD15 pair4.jpg have traces equally priced at precisely the exact same firm.

There are two important differences between the BP-9000 and requisite merchandise lines. 1 difference is the BP-9000 show utilizes a bipolar design in which sound is projected in the back of the loudspeaker.

This ought to result in a sound infused with more late reflections that have been demonstrated to boost listener envelopment, even though that may come in the expense of a broad soundstage and precise stereo imaging. Another distinction is the BP-9000 series employs built-in powered subwoofers.

This takes a load from this user-provided amplifier. But with the incidence and flexibility of affordable and powerful subwoofers, built-in powered subwoofers are more of a charm to people who don’t need to devote floor distance to standalone subs.

In contrast, the Demand series is a far more traditional loudspeaker design. The exception of speakers can result in a more acoustically predictable speaker using finer imaging along with a wider front soundstage.

Not having a powered subwoofer segment makes integration using outboard subs significantly less complex. So while Definitive Technology has two unique lines occupying a comparable budget, in my estimation, they’re distinct enough to warrant their accessibility.

Definitive Technology appeared to want to offer you a more traditional alternative for their BP-9000 collection, thus the reason behind the invention of the Demand tower speakers.

Let us concentrate on the need D15 itself for a minute. At $3,400 a couple, they certainly aren’t cheap but are they expensive. It is a more straightforward loudspeaker design than Definitive Technology’s other floor-standing speakers, also when this simplicity is a market of sophistication for high quality, which could be a welcome commerce.

This isn’t to mention the design is straightforward, and we’ll enter the several facets of its structure within our ‘design investigation’ segment, but it’s a whole lot more of a conventional loudspeaker compared to BP-9000s. There are a whole lot of conventional floor-standing loudspeakers in its budget, nevertheless, so what exactly does the demand D15 do to distinguish itself from the remainder? Let us find out…

Definitive Technology Speakers


Upon entrance, the D15 speakers do require a small quantity of assembly by screwing into a metallic plinth to the ground and screwing feet to the plinth, but that’s simple and takes less than 5 minutes. Unboxing the D15’s shows them for a stunningly contemporary design.

The boxiness of this cupboard isn’t in any way softened by corner, also, in reality; the design adopts it with tough right angles in all corners. This is an attempt to contrast the various circles of those drivers which are highlighted with black robes contrary to the mild aluminum front baffle.

The all-aluminum front baffle provides an extremely appealing and high-end element into the look, also, to tell the truth, I’m surprised to find something similar to that at a speaker in a price this low. Though the industrial design is striking, I really don’t think that it is’loud’ in it is going to develop into the middle of focus in many rooms.

For people who desire a tamer look, the grille hides front baffle using a light-silver cloth and gives the speaker a far more minimalist appearance. The grille employs magnetic adhesion; therefore it does not have any grille guides to disrupt the smooth look of the front baffle.

Normally, I believe grilles create the speakers only seem dull, but this isn’t the situation here. Oddly, there are just a few pictures of this D15’s using the grille on submitted to Definitive Technology’s product page.

You can find 8″ passive radiators on either side of the speaker which possess a gloss white cone and therefore are readily the nicest-looking passive radiators I’ve ever seen. The tweeter is an aluminum ribbon that’s partially obscured by a stage lens and contains a mirror-image counter at a sizable black faceplate.

It almost looks like a watch that’s looking off to the side. The midrange driver includes a massive phase plug which Definitive Technology has employed in previous designs. I haven’t cared for how it seems in the past, but it is not as visually obtrusive here. Absolutely, I think that it’s an intriguing looking speaker without the grille.

I’m guessing that people who generally object to the look of speakers will get together with them when the grille is set up. From the Gloss White end, they’d fit right in almost any brightly colored decoration. All-in-all, the requirement D15 speakers seem quite wonderful.

Design of Definitive Technology Speakers

Design Evaluation In these broad strokes, this really is not a particularly odd design, but you will find a plethora of design inventions that do put the D15s besides additional tower speakers in its own class.

Let us start our discussion beginning from the top and moving down, so let us discuss the tweeters. The aluminum of the tweeter dome is annealed, so it’s been softened by attracting the aluminum near its melting point and then letting it cool slowly.

This procedure dissolves the crystalline structure of the alloy, also, in its own recrystallization, it becomes thicker. In its milder state, it’s improved the damping that can tame break-up manners in greater frequencies. It should result in a smoother sound, particularly with people that are sensitive to high treble frequencies. There’s a plastic piece that partially covers the front of the tweeter that’s a stage lens which Definitive technology calls for the’20/20 Wave Alignment Lens.

‘ It might also function as protection to the delicate diaphragm of this tweeter dome. It gets that name since the cone utilizes two surrounds: 1 surround about the outer edge of the cone and you at the interior border that attaches into the stage plug. Definitive Technology claims this dual surround system enables greater linear excursion.

In theory, it ought to be possible that two encircles could offer a more controlled trip from the suspension parts, although I cannot imagine that could offer a massive increase in trip. It is the biggest phase plug I’ve observed, and that’s most likely why Definitive Technology requires it a waveguide, though it certainly doesn’t be a conventional waveguide.

It seems to me like it only does exactly what regular stage sticks do that’s blocking wavefronts in different regions of the cone out of colliding and interfering with one another. It just does it a whole lot more than ordinary stage plugs. They seem fine and have a beefy environment so they ought to be quite effective in bass frequencies.

They’re also utilized to power both “passive radiators on the sidD17_Render. Jpge of this speaker. Definitive Technology claims a lesser -3dB limitation of 48 Hz for your D15, therefore these springs must be quite able down to 50 Hz at the least. I was not able to find a good look at the bare drivers because a trimming ring covers the framework screws, and eliminating the trim ring could be a little risky because it’s glued on.

The crossover circuit is a fairly formidable piece which employs a large number of higher-quality components like metal-film capacitors along with air-core inductors. There’s a second-order acoustical crossover involving the bass driver along with midsize driver in 450 Hz and also a third-order crossover between the midrange and tweeter in 2.5 kHz.


The D15 includes two collections of five-way nickel-plated binding articles for people who wish to bi-wire or bi-amp the speakers. This is a characteristic that many upscale speakers are assumed to possess but in fact, it isn’t too helpful. The benefits of bi-wiring or even bi-amping a speaker such as this are insignificant and not worth the possibility for issues that could happen for people who try those kinds of connections.

All this technology is put in a really slick MDF cabinet with the above aluminum front baffle that’s 6mm thick. The side panels and bracing are 18mm using all the bracing designed and placed using FEA analysis for optimum stiffness of the cupboard.

The midrange is included within its heavily-damped compartment at the cupboard to ensure back waves in the bass drivers don’t impact the cone place. A good quantity of polyfill stuffing is set in the cupboard for inner damping. The speaker is put on a square aluminum bass together with the selection of spiked rubber or feet. The cupboard feels strong and inert.

The requirement D15 speakers appear to be a well-designed and capable loudspeaker, however, much like almost any luxury loudspeaker, its purpose would be to sound good.

Inside my 24′ by 13′ (roughly) listening area, I put up the speakers together with stand-off distances between the rear wall and sidewall, and equivalent space between speakers and listening position. The speakers have been set up to confront the listening place right.

Listening distance out of the speakers was approximately 9 feet. No space correction equalization was utilized. Subwoofers were utilized for some content which comprised deep bass frequencies.

The soundstage was exceptional, and every instrumental segment was easily localizable. The music has been played with La Chapelle Harmonique, and it will be a choir along with some period-instrument orchestra which was set by series instrument player Valentin Tournet at 2017 (if he had been a mere 20 years old).

The musical artistry and creation is second to none in this recording, and anybody searching for a few of the best recorded performances of those pieces by Bach want look no further.Bach Magnificat.jpg

How did the Definitive Technology D15 speakers sound with such a gifted group of musicians doing such exquisite compositions listed in such a mythical acoustic space? In the very first notes, the sound has been enthralling. Every musical section was different and crystal clear.

Now, a lot of those qualities are things of this recording, so it is not like the speakers are able to make an unremarkable recording sound great, but what I heard right off is that the D15 speakers can make it possible for an outstanding recording to satisfy its potential. The tonal balance across vocals and tools appeared to be somewhat good.

The soundstage was exceptional, and every instrumental segment was easily localizable. The lead singers had quite well-defined positions through the breadth between the speaker positioning, and the concert hall ambiance extended well past the speaker’s borders.

Bass was controlled with expansion which readily covered the lower frequencies included in this album. I guess a speaker of the design might struggle at a massive space if tasked with playing quite loud levels, but to get a normal-sized room such as my 24′ x 13′ room, they’d all of the dynamic range I might request and could be adequate in this regard for all but intense SPL junkies.

From the conclusion of the record, I understood the D15 speakers are a fantastic selection for any fan of classical music.

For much more concentrated on a single voice, I discovered an excellent option from the record’Birds oBirds on a Wire. jpgn a Wire’ from the duo Dom La Nena and Rosemary Standley who play together under the title Ramages.

This was just another hi-res brand new release which I discovered on Qobuz. The instrumental accompaniment is rather straightforward and mostly only is made up of cello and guitar however sometimes other tools will produce a contribution.

This is more straightforward music and tender music. A few of the tracks are celebratory, while others are somewhat sorrowful, and the cello is a good tool to evoke sadness. Her vocal range might be restricted but her hands in her range are superb. Her voice has been piled imaged in the middle between speakers.

There’s absolutely no ambiguity in the soundstage of this D15s. The corresponding tools also had quite well-defined placement. The clarity of these individual instruments was fantastic as they took a backseat to the vocals inside the recording. All these are fairly speakers, therefore one thought that happened to me was: would be the pretty looks of this speaker biasing my perception of this sound?

Possibly, but generally, I guess pretty speakers set aesthetics and industrial design initially and sound reproduction functionality instant (if that high up the listing in design principles), but the overall sound was exceptional whilst listening to ‘Birds on a Cable’ These are not incredibly expensive speakers .

I’d have guessed that speakers using sleek aluminum front and foundation using a gloss finish together with a seriously good sound will cost more than the $3,400 MSRP for those D15s. The speakers I have heard at sound commerce indicates that seemed and sounded this good were much more costly than these.

How can it be Definitive Technology can pull off high-end appearances along with a luxury sound with no luxury price tag? I would suppose the response is smart design coupled with very efficient production techniques (the absence of curvature from the cupboard might be a true benefit in creating these speakers cheap).

Listening Sessions

Several years ago I had discovered some tunes from Roberto Fonseca tYesun.jpghat I really enjoyed, and I’d always planned to further research more music but it just kept slipping my mind. While surfing through Qobuz’s library, I detected Fonseca’s most current release,’Yesun,”’ was accessible hi-res, so that

I eventually decided to dive into more of his own music to find a better sense of him as a artist and to listen to what the D15’s can do with his songs. There’s a huge array of musical moods and fashions on’Yesun,’ plus some stray farther from Deadly Jazz than many others, however the music is always playful,

And also the diversity of sound and distinct instruments making this a fantastic record to demonstration to a high-fidelity sound platform.

Music Listening


Much like preceding music, the D15s provide a very clear and lucid demonstration of every device, so much so I managed to differentiate mic installation with respect to a number of the individual devices.

The soundstage was magnificent; it illuminates over a broad breadth of distance however not at the expense of precision. On particular moments throughout the record, I cranked the volume loudly, and the speakers didn’t lose their composure.

This really is a percussion-rich music that’s excellent for displaying the passing character of sound techniques, and every percussive tool was different on the D15s, whether that’s snares, congas, cymbals, hi-hats, or bass drums. There wasn’t any vagueness or overhang that I could discover, and this instant response made to get a life threatening presentation.

Like so much else I had discovered on the D15 speakers, I wasn’t left wanting for almost any facet of sound at listening to’Yesun.’ It’s 33 tracks of experimental and abstract ambient music from artists around the roster of this French digital music label Mille Feuilles.

This music can be very challenging occasionally and may vary from relaxing and relaxing into harsh and grating. It’s strange stuff and not for everybody’s tastes, but I love the exploration of unique sounds which the artists participate in. There’s such many different unique sounds here I believed it’d be a good display of this scope and skill of their D15 speakers.

The name of the album makes it even more apt as, at the time of this writing, I’m was below a Stay-At-Home sequence in my nation due to COVID-19. This frequently dissonant music is a good manifestation of the stress of the age of COVID-19, but I’m sure most folks would favor more escapist music in these instances, and that I cannot blame them.

The stereo effects utilized in lots of the paths in ‘Music for Containment’ aren’t supposed to become the imitation of a pure sound occasion, and, rather, they’re utilized for a more conceptual aural space. The D15 speakers adroitly hauled using imaging as a car for an idea as opposed to a mere replica of a conventional sounds cape.

I must imagine that the artists of the record probably anticipated most listeners will listen to headphones, but the atmospheres created by means of a pair of good high-fidelity speakers such as the D15s are much more palpable. The true-to-life imaging, in addition to the more tactile bass of loudspeakers, create the listening experience a lot more concrete than having cans.

It is hard to discern the sound of lots of the tracks on ‘Music for Containment’ for their’Acousmatic Sound’ doctrine. However perplexing the musical compositions were, the sound was always unambiguous, and also the D15s provided a very clear interpretation of the origin.

Each layer of sound stayed different on the D15s, and every sound was supplied a comprehensive representation. I am unsure how a lot of folks would like ‘Music for Containment,’ but people who do should give it a listen to speakers on the degree of this D15s; I believe it’s a far richer experience than can offer.

Film Seeing I’d not seen it earlier, but I knew it’d be an effects-laden picture, and I wished to find out exactly what the speakers can do using a broad dynamic range sound mixture. Additionally, I wanted to find out exactly what it could do with regard to bass without a subwoofer.

‘Venom’ is a significant studio production about a man that gets owned by a mad alien demon thing that gives him superpowers, so it seemed like it’d have a fairly far-out sound combination that could be a good presentation of dynamic selection and low-frequency expansion.

I cranked the volume and allow ‘Venom’ tear on the D15 Definitive speakers, and it was not long into the film when I could listen to the passive radiators overloading. I quickly learned the D15 speakers are unhappy in profound frequencies in large volumes.

While I could turn music to the exact same loudness levels rather than stress, most music bass doesn’t dig as deep as contemporary film bass. Music, notably acoustic records, does not actually dig below 40 Hz at elevated levels, but a good deal of contemporary action and science fiction films do.

Deep frequencies are more taxing to bass drivers compared to substance above 40 Hz. Dialogue intelligibility was good also, and also to guarantee that has been a quality of this D15s, I’d put my chip for two-channel performance, and no centre speaker has been utilized.

‘Venom’ has been a crazy ride so far as sound combinations move, as well as also the D15 speakers can surely takes the listener on that travel – provided that their low-frequency limitation Once Upon Time Hollywood jpgns are known.

Definitive Technology Speakers

Movie Watching

One picture I was itching to see because its statement was ‘Once Upon a Time in Hollywood,”’ Quinten Tarantino’s literary saga about Hollywood’s brush with Charles Manson.

I figured this could be a wonderful way to judge dialogue intelligibility because Tarantino’s films are greatly dialogue-based and the manufacturing quality could be as good as it gets.

Tarantino also fills his films with plenty of music, so they’re typically a excellent way to listen to some good tunes in addition to Tarantino’s frequently brilliant dialogue. 1 aspect that amazed me was that the pervasive use of diagetic music resources within an part of the sound combination.

But, it was only a smart and possibly more immersive way to acquire music to accompany the visuals. The music sounded fantastic and dialog intelligibility was not less than outstanding. This picture was living with continuous music resources; therefore it was good to follow it on several speakers which didn’t inhibit the sound quality.

Though the music was largely older records, I’d implore audiences to utilize a good sound system for movies such as this. The sound is much richer than anything else that a sound bars or home-theater-in-a-box might have handled.

Leave a Comment