A legend reborn Everything moves on. Even
when you’ve reached the pinnacle of technological
achievement, there are always new goals to aim
for, new standards to set. In 1979, we redefined
what’s possible in sound reproduction with the
very first 800 Series speaker – the Matrix 800. In 1998, we re-wrote the rulebook all over again
with the Nautilus™ 800 Series. But we didn’t stop
there. We continued to refine and experiment, and
now we’ve raised the benchmark yet again. The 800
Series Diamond harnesses the unique properties of
diamond throughout the range, producing a sound
of unheard-of accuracy and realism. At Bowers &
Wilkins, the quest for perfection never ends.
The evolution of excellence Introducing superior drive
units housed in separate
chambers, the Matrix 800’s
unprecedented sound quality
made the speaker a fixture in top recording studios and
the homes of discerning audio
enthusiasts. With the Nautilus
800 Series and now the 800
Series Diamond, the tradition
continues.
The miracle material It can cut stone and grind
glass. It’s a superb thermal conductor. And it’s the
magic ingredient in every model in the new 800
Series Diamond range. Our acoustic research expert
Dr Gary Geaves explains why diamond is the ultimate
tweeter material.
Tell us about tweeter design – what are you
trying to achieve, and what are the main
challenges to overcome?
Our aim here at Bowers & Wilkins has always
been to design transducers that accurately
reproduce the signal. It’s really quite easy to
create a sound but it’s much more difficult to
reproduce a signal accurately. When it comes
to tweeters, this aim translates into creating a device that moves as a rigid piston over the audible frequency range – in other words,
the range below 20 kHz.
As you go up in frequency, you reach a
point where the tweeter stops behaving in a
nice, controlled way and it starts to resonate.
The frequency at which this occurs is usually
called the break-up frequency. As you go
beyond the break-up frequency, you encounter
more and more resonance. The problem with
resonance is that it imparts a character to the
speaker, which is obviously not what you want
when you’re aiming to accurately reproduce a signal.
So the main challenge in tweeter design is to overcome the problem of resonance. And you do this by trying to push the breakup frequency as far above the range of human
hearing as it can possibly go.
800 Diamond
802 Diamond
What have you been doing to get around
this problem?
For a long time, Bowers & Wilkins have used
aluminium dome tweeters. Aluminium’s a really
good material to use, because it’s relatively
light and stiff, and it results in a relatively high
break-up frequency. Over the years we’ve been
able to optimise the mechanical design. For
example, for the second generation 800 Series,
we managed to improve the break-up frequency
from about 23 kHz to 30 kHz.
It was then that we noticed something
odd. We found that, with each improvement
in break-up frequency, the resulting tweeter
sounded much cleaner. Not that surprising,
you might think – but we found this really
curious because, as I’ve already said, human
beings can only hear up to 20 kHz. Improving
the break-up frequency from 23 to 30 kHz
shouldn’t have made any difference to the
audible sound quality. And yet it did. So
we started to wonder why this was, and if
there might be ways of raising the break-up
frequency much higher.
803 Diamond
804 Diamond
805 Diamond
Simulated acoustic Frequency response
Simulated acoustic Frequency response
30
30
20
20
20
20
10
10
10
10
0
0
0
0
-10
-10
-10
-10
-20
-20
-20
-20
Frequency (Hz)
How did you go about trying to raise the
break-up frequency level? What sort of
design approaches did you consider?
We started off by thinking about the size, shape
and positioning of the tweeter. Now, the easiest
way to improve the break-up frequency is to
make the tweeter much smaller. The problem
with that approach is that, to get the same
output over the same bandwidth, you have to
drive the speaker a lot harder. The dome has to
move a lot more. And when that happens, you
run into problems with linearity, distortion and
power compression.
An alternative approach might be to use
a supplementary tweeter in addition to your
main tweeter. We did consider this, but we
found it just complicated the situation. Instead
of compensating for the deficiencies of a main
tweeter, the supplementary tweeter just added
its own set of problems. There was also the
potential for interference between the two
tweeters. In the end, this approach just didn’t
seem consistent with our principle of keeping
things simple.
HTM4 Diamond
Simulated acoustic Frequency response
30
-30
HTM2 Diamond
Simulated acoustic Frequency response
30
10000
-30
20000 Frequency (Hz)
10000
100000
20000
100000
-30
Frequency (Hz)
10000
-30
20000 Frequency (Hz)
10000
100000
How did you hit on the idea of using
diamond as a tweeter dome material?
So what are the benefits of using diamond
tweeter domes?
We discovered the benefits of diamond thanks
to a process called finite element analysis. It’s
a tool that’s widely used in the aerospace and
automotive industries to create virtual computer
prototypes, so you can carry out experiments
before committing to a real physical prototype.
By using finite element analysis we were
able to look more closely than ever before at
how a speaker reproduces sound. We could
examine in detail how the whole structure
vibrates, and the acoustic field that results from
the vibration. We were also able to look at the
motor systems in loudspeakers. This allowed
us to come up with new ways to optimise
sensitivity, improve linearity, and design better
shielding.
It was by using finite element analysis that
we first simulated the response of a perfect,
rigid tweeter, made from an infinitely stiff
material. This is a material that doesn’t exist
in reality – but that’s another beauty of finite
element analysis; you can do things that you
can’t do in the real world. So we started to look
at tweeter dome materials we could use instead
of the aluminium – materials that shared similar
properties to the hypothetical perfect dome.
And we found that the ultimate material – the
absolute closest match in terms of its rigidity
and dynamic stiffness – is diamond.
As I said, with aluminium, we were getting a
maximum break-up frequency of about 30 kHz.
Pretty amazing, when you consider the human
hearing threshold is 20 kHz. But by using
diamond, we were able to go far, far higher than
that, creating a tweeter that breaks up at 70 kHz.
However, diamond doesn’t just have a
much higher break-up frequency – it also
outperforms aluminium within the range of
human hearing. When you compare the
response of a diamond tweeter with the perfect
hypothetical rigid tweeter, the results are very
similar below 20 kHz. And this means that you
can hear a dramatic improvement in sound
quality.
The resulting tweeter sounds more
effortless, and yet more detailed, and has
a much more realistic soundstage than the
standard aluminium tweeter.
Diamonds all round The
800 Series Diamond family
encompasses speakers of all
sizes and applications, from
mighty studio monitors to
bookshelf speakers that will fit
snugly into domestic spaces
of any size. But while every
speaker is different, they have
two key features in common:
a tweeter made from pure
diamond, and sound quality
that will leave you speechless.
Computer simulations show
that the response of a
diamond dome (right) more
closely matches the behaviour
of the hypothetical perfect
tweeter than an aluminium
dome (left).
20000
100000
Dr Gary Geaves, Head of Research, Bowers & Wilkins
A diamond is born
Making diamond the natural way takes volcanic
temperatures and pressures, and around two
billion years. Hardly ideal if you want to produce
it for manufacturing purposes, let alone form
it into the precise shape required for a tweeter
dome. Luckily, scientists have found a way
around this. Chemical vapour deposition is a technique that allows diamond to be grown, like a crystal, under laboratory conditions.
The process starts with the former – the dome
of metal on which the thin layer of diamond is
grown. Each former is meticulously inspected
and weighed before being transferred to a
specially designed furnace, where gases are
super-heated and pressurised. Out of the gases
forms a carbon frost (diamond crystals), which
grows on the surface of the former to create a super-fine, ultra-hard diamond dome.
Making the cut
Once the diamond has formed, it is precisioncut by laser to remove any surface irregularities
and to make sure that the geometry of each
tweeter dome exactly matches the next. The
diamond domes are then cleaned in four stages
in an ultra-sonic tank, before a protective
platinum coating is applied to the surface.
Each diamond dome is rigorously tested and
inspected for the tiniest signs of imperfection.
Only when a dome has passed every test do
we give it the final seal of approval – its own
unique serial number. From this number we can
trace the entire history of its manufacture, right
back to the former on which it was grown.
A head for sound
Nautilus tubes
The teardrop-shaped midrange head is a
distinctive feature of both the top-of-the-range
800 Diamond and the 802 Diamond. Moulded
from Marlan™, a synthetic, mineral filled resin,
this granite-hard enclosure is sprayed with
seven coats of lacquer and polished by hand
until it’s as smooth as glass.
Not all the sound generated by tweeter drive
units is good sound. To soak up wayward
sound energy and reduce resonances to a
minimum, every tweeter in the 800 Series
Diamond is mounted on top of the cabinet, and
uses the tapering tube design from Bowers &
Wilkins’ trailblazing Nautilus speaker. Added to
this, our new quad-magnet design improves
sensitivity, which reduces compression and
brings music to life. So all the sound you hear
is good sound.
Quad magnets For the
800 Series Diamond we
have redefined the science of
magnet motor design. In the
tweeter, a unique quad magnet
design (in red, above) focuses
the magnetic energy right
where the voice coil sits, and
keeps the driver running cool
and smooth.
Shock waves
Kevlar® is known as the wonder fabric in
bulletproof vests. But, as Bowers & Wilkins
discovered, no material is better suited to
disrupt the standing waves that cause distortion
and coloration in the midrange. To enhance the
properties of Kevlar yet further, we’ve added
something very special. The FST™ acts like
a circular shock absorber around the cone,
almost totally absorbing the sound-smudging
bending waves that travel outwards to the
cone’s perimeter. A midrange driver never
sounded cleaner, or more responsive.
Rock solid
Force of attraction The
bass drivers in the 800 Series
Diamond range are powered
by a brand new dual magnet
motor system (in red, top)
creating a more symmetrical
magnetic field and reducing
harmonic distortion.
The 800 Series Diamond bass driver is a
formidable piece of engineering, designed to preserve the speed and ‘slam’ of the most
demanding bass lines. The cone material is
Rohacell®: a sophisticated composite of the
kind normally used for aircraft and performance
cars. The new dual magnet design reduces
distortion for more natural and consistent bass character. For unshakable bass, it’s the bottom line.
Deep breath
Bass needs air to breathe. But if turbulence
occurs as air moves in and out of a speaker’s
reflex port, you’ll hear extraneous noise – and, as you turn the volume up, the bass won’t be as tight or well-timed as it should be. The Flowport™ in the 800 Series Diamond
minimises turbulence in the same way as a golf ball. Dimples on the surface generate tiny
eddy currents, over which air can flow smoothly
and, above all, silently.
Deceptively simple
Gold/Silver/Oil Mundorf
capacitors in the highfrequency crossovers, for
improved signal to tweeters
and superior sound quality.
The way a speaker’s crossover is constructed
speaks volumes about the quality of its
mechanical components. What to look for is
simplicity. The rule is, the better the design of
the drive units, the simpler the design of the
crossover can afford to be. And the quality of the 800 Series Diamond drive units is such
that we’ve been able to make the speaker’s
first-order crossover one of the simplest – and best – we’ve ever produced.
Natural strength
You won’t find many straight lines in nature –
for good reason. Continuous, curving surfaces
create stronger structures with the same
amount of material. In the 800 Series Diamond,
the curving cabinet forms a solid outer shell
that shrugs off vibrations and resonance. Add
an internal Matrix™ system that braces the
structure like the ribs of a ship’s hull, and you
have a speaker that’s more than capable of
standing firm under pressure.
An ear for quality Developing and assembling
great drive units is one thing. But it’s up to the
crossover to make sure those drivers are singing
harmoniously together. According to top development
engineers John Dibb and Tom O’Brien, designing
the perfect crossover is a job that requires patience,
fine judgement and many hours of listening.
Why is simplicity so important in
crossover design?
What role does listening play in the
design process?
John Dibb: John Bowers once said that we’re
not trying to give the most in a loudspeaker,
we’re trying to lose the least. That was many
years ago, but it’s just as relevant today. The key to loudspeakers is not losing the fine detail
in the sound.
Our aim is to create an illusion of reality by
giving the listener accurate auditory clues – and
to remove the distortion and colouration that
can mask this information. We’ve been able to
enhance our measurement techniques to the
point where we know more than ever about the
factors that cause distortion and colouration
in drive units. Nowadays, drive unit design
has become so advanced that it has virtually
eliminated these phenomena. In turn, this has
allowed us to keep crossover design as pure
and simple as possible.
However, when drive units are working so
well, this highlights another potential challenge:
the difference in the sound of the different
components within the crossover. We need to make sure that the components we choose
for a speaker’s crossover are the very best ones for the job.
Tom O’Brien: You can get two identical-looking
components, specified exactly the same way on paper, but one will have a completely
different sonic characteristic to the other. And
the only way that it’s possible to pick out the
ones that sound the best is by listening to them
one at a time, over and over again.
This listening process can take a long time. It can take weeks, sometimes months, to fully
balance the system and fine-tune it until we’re
happy with it. We have to try the systems
out in many different rooms, and on different
equipment, with a huge variety of music.
I think it’s a great testament to our attention
to detail that recording studios such as Abbey
Road, Deutsche Grammophon and Decca,
among others, have used our speakers for
a long time to monitor their music. It’s the
ultimate test to hear the master tape of a
recording that’s been done minutes ago,
and check that it’s close to reality of the
performance in the studio.
John Dibb (above) and Tom O’Brien (left), Bowers & Wilkins development engineers
Art meets science
At our dedicated cabinet-making factory in the
UK, state-of-the-art technology is fused with
traditional craftsmanship. While a single 35mm
thick sheet of ply is pressed into shape for the
main cabinet body of the 800 Series Diamond,
its final skin of real wood veneer is selected
by hand from only the top 10% of veneers
available. All of the wood we use is sourced
from sustainable forests.
Perfect partner
If you’re planning to use the 800 Series
Diamond as part of a home theatre set-up,
there’s every chance that you take your film
viewing enjoyment very seriously indeed.
In which case, you’re also going to need a
seriously good subwoofer. One with the power
needed to deliver the mightiest movie sound
effects, but also one with the finesse and
precision to match the incredible realism of the
800 Series Diamond. Not an easy balance to
strike. But one that the DB1 subwoofer handles
with ease.
Despite its relatively compact size, the DB1
delivers awesome bass power, thanks to a
unique design incorporating two opposing 12 inch drivers, and its own built-in 1000W
digital amplifier. Digital Signal Processing
keeps the output dynamic and accurate, while
equalization software fine-tunes the speaker
to match the character of your listening room.
Power. Responsiveness. Control. Put them
together, and you’ve got a subwoofer that’s the ideal match for the 800 Series Diamond.
Take control The DB1
allows you to make minute
adjustments depending
on your personal listening
preferences, or optimise the
speaker for whatever you are listening to: music, movie
or games. Adjustments can
be made on the DB1’s OLED
display, or via a computer with the downloadable SubApp software.
Where it all begins
In leading recording studios around the world,
music that will soon be heard everywhere is heard first through 800 Series speakers. At Abbey Road, sound engineers depend on the speakers, safe in the knowledge that
what they hear in the control room is as close
as possible to the sound of the performance in the studio. In California, Skywalker Sound is where Hollywood puts music to movies. And they do it on the ultimate surround sound system, featuring Bowers & Wilkins 800 Series speakers.
Peter Cobbin, recording
engineer, Abbey Road
Studios: “The B&W 800
Series is the only speaker I have found that allows me to accurately listen to how the original performance has been recorded.”
800 Diamond
The speaker of choice for the world’s most
demanding recording studios, and a legend
among serious sound enthusiasts everywhere,
the 800 Diamond is the top speaker in the
range – and very probably the finest speaker
you will ever hear.
Diamond tweeter Diamond
dome. Nautilus tapering tube
design. Quad magnet motor
system. Tweeter-on-top
geometry.
Kevlar Midrange Woven
Kevlar midrange driver. FST surround. Spherical head enclosure moulded from Marlan.
Matrix Internal bracing
system for cabinet stability.
Rohacell bass
drivers Rohacell foam/
carbon fibre composite bass
driver. Dual magnet motor
system. 75mm voice coil.
Terminal Oxygen Free
Copper (OFC) terminals for
improved signal quality.
Crossover Gold/Silver/Oil
capacitors in high-frequency
crossovers, for improved
signal to tweeters and
superior sound quality.
Flowport Reflex port
technology for optimum bass
performance and minimum
turbulence distortion.
Rosenut
Cherrywood
Piano Black Gloss
802 Diamond
If you’re looking for a speaker with the power,
clarity and presence of the mighty 800
Diamond, but your listening area can’t quite
accommodate its studio-sized proportions, the 802 Diamond is the answer. Retaining the groundbreaking spherical head design of its bigger brother, it’s the closest you’ll get to true studio sound at home.
Diamond tweeter Diamond
dome. Nautilus tapering tube
design. Quad magnet motor
system. Tweeter-on-top
geometry.
Kevlar Midrange Woven
Kevlar midrange driver. FST surround. Spherical head enclosure moulded from Marlan.
Matrix Internal bracing
system for cabinet stability.
Rohacell bass
drivers Rohacell foam/
carbon fibre composite bass
driver. Dual magnet motor
system. 38mm voice coil.
Terminal Oxygen Free
Copper (OFC) terminals for
improved signal quality.
Crossover Gold/Silver/Oil
capacitors in high-frequency
crossovers, for improved
signal to tweeters and
superior sound quality.
Flowport Reflex port
technology for optimum bass
performance and minimum
turbulence distortion.
Rosenut
Cherrywood
Piano Black Gloss
803 Diamond
The 803 Diamond might look almost as
imposing as the 802 Diamond, but thanks to its smaller footprint and more traditional
cabinet design, it will fit more easily into a home environment. With three massive 7 inch Rohacell bass drivers, it delivers almost
as much bass as the 802 Diamond, filling
even the largest of domestic rooms with rich,
stunningly lifelike sound.
Diamond tweeter Diamond
dome. Nautilus tapering tube
design. Quad magnet motor
system. Tweeter-on-top
geometry.
Kevlar Midrange Woven
Kevlar midrange driver. FST
surround.
Rohacell bass
drivers Rohacell foam/
carbon fibre composite bass
driver. Dual magnet motor
system. 38mm voice coil.
Matrix Internal bracing
system for cabinet stability.
Terminal Oxygen Free
Copper (OFC) terminals for
improved signal quality.
Crossover Gold/Silver/Oil
capacitors in high-frequency
crossovers, for improved
signal to tweeters and
superior sound quality.
Flowport Reflex port
technology for optimum bass
performance and minimum
turbulence distortion.
Rosenut
Cherrywood
Piano Black Gloss
804 Diamond
The elegant floorstanding 804 Diamond
offers a commanding acoustic presence, and
incorporates diamond tweeter technology for
the first time. A true three-way design, it also
features two Rohacell bass units and a woven
Kevlar FST midrange driver. This combination
ensures that it delivers pin-sharp clarity all the
way up the frequency range.
Diamond tweeter Diamond
dome. Nautilus tapering tube
design. Quad magnet motor
system. Tweeter-on-top
geometry.
Kevlar Midrange Woven
Kevlar midrange driver. FST
surround.
Rohacell bass
drivers Rohacell foam/
carbon fibre composite bass
driver. Dual magnet motor
system. 38mm voice coil.
Matrix Internal bracing
system for cabinet stability.
Flowport Reflex port
technology for optimum bass
performance and minimum
turbulence distortion.
Terminal Oxygen Free
Copper (OFC) terminals for
improved signal quality.
Crossover Gold/Silver/Oil
capacitors in high-frequency
crossovers, for improved
signal to tweeters and
superior sound quality.
Rosenut
Cherrywood
Piano Black Gloss
805 Diamond
You asked for it. And now you’ve got it. The 805 Diamond is an industry world-first for a speaker of this size and at this price point – the only one of its kind to incorporate true
studio-grade technology in the form of a
diamond dome tweeter. Experience remarkable,
lifelike sound from a discreet speaker that fits
almost anywhere.
Diamond tweeter Diamond
dome. Nautilus tapering tube
design. Quad magnet motor
system. Tweeter-on-top
geometry.
Matrix Internal bracing
system for cabinet stability.
Kevlar Bass/Midrange Woven Kevlar bass/ midrange driver.
Flowport Reflex port
technology for optimum bass
performance and minimum
turbulence distortion.
Terminal Oxygen Free
Copper (OFC) terminals for
improved signal quality.
Crossover Gold/Silver/Oil
capacitors in high-frequency
crossovers, for improved
signal to tweeters and
superior sound quality.
Rosenut
Cherrywood
Piano Black Gloss
HTM2 Diamond
If you’re looking for a centre-channel dialogue
speaker to use as part of an 800 Diamond home
theatre set-up, HTM2 Diamond provides all the
clarity and richness you need for larger viewing
spaces. That’s down to a three-way design
featuring two dedicated bass drivers – and, of course, a diamond dome tweeter.
HTM4 Diamond
Terminal Oxygen Free
Copper (OFC) terminals for
improved signal quality.
Terminal Oxygen Free
Copper (OFC) terminals for
improved signal quality.
Crossover Gold/Silver/Oil
capacitors in high-frequency
crossovers, for improved
signal to tweeters and
superior sound quality.
Crossover Gold/Silver/Oil
capacitors in high-frequency
crossovers, for improved
signal to tweeters and
superior sound quality.
Diamond tweeter Diamond
dome. Nautilus tapering tube
design. Quad magnet motor
system. Tweeter-on-top
geometry.
Diamond tweeter Diamond
dome. Nautilus tapering tube
design. Quad magnet motor
system. Tweeter-on-top
geometry.
Kevlar Midrange Woven Kevlar
midrange driver. FST surround.
Kevlar Bass/Midrange Woven
Kevlar bass/midrange driver.
Rohacell bass drivers Rohacell
foam/carbon fibre composite
bass driver. Dual magnet motor
system. 38mm voice coil.
Matrix Internal bracing system
for cabinet stability.
Perfect for smaller viewing areas, the HTM4
Diamond centre-channel speaker will seamlessly
balance the sound in an 800 Diamond home
theatre set-up, thanks to highly advanced,
complementary technology like a Kevlar bass/
midrange driver and – for the first time ever – a diamond dome tweeter unit.
Flowport Reflex port technology
for optimum bass performance
and minimum turbulence
distortion.
Matrix Internal bracing system
for cabinet stability.
Flowport Reflex port
technology for optimum bass
performance and minimum
turbulence distortion.
Rosenut
Cherrywood
Piano Black Gloss
Rosenut
Cherrywood
Piano Black Gloss
Specifications
800 Diamond
802 Diamond
Free-mounted diamond dome tweeter
Free-mounted diamond dome tweeter
Nautilus tube tweeter loading
Nautilus tube tweeter loading
Quad magnet tweeter motor
Quad magnet tweeter motor
Kevlar brand fibre cone FST midrange
Kevlar brand fibre cone FST midrange
Sphere/tube midrange enclosure
Sphere/tube midrange enclosure
Rohacell cone bass
Rohacell cone bass
Dual magnet bass driver motor
Dual magnet bass driver motor
Matrix cabinet
Matrix cabinet
Flowport
Flowport
Description
3-way vented-box system
3-way vented-box system
Drive Units
1x ø25mm (1in) diamond dome high-frequency
1x ø25mm (1in) diamond dome high-frequency
1x ø150mm (6in) woven Kevlar cone FST midrange
1x ø150mm (6in) woven Kevlar cone FST midrange
2x ø250mm (10in) Rohacell cone bass
2x ø200mm (8in) Rohacell cone bass
Frequency range
-6dB at 25Hz and 33kHz
-6dB at 27Hz and 33kHz
Frequency response
32Hz – 28kHz ±3dB on reference axis
34Hz – 28kHz ±3dB on reference axis
Dispersion
Within 2dB of reference response
Within 2dB of reference response
Horizontal:
over 60º arc
Horizontal:
over 60º arc
Vertical:
over 10º arc
Vertical:
over 10º arc
Technical features
Sensitivity
90dB spl (2.83V, 1m)
90dB spl (2.83V, 1m)
Harmonic distortion
2nd and 3rd harmonics (90dB, 1m)
2nd and 3rd harmonics (90dB, 1m)
<1% 45Hz – 100kHz
<1% 40Hz – 100kHz
<0.5% 80Hz – 100kHz
<0.5% 70Hz – 100kHz
Nominal impedance
8V (minimum 3.1V)
8V (minimum 3.5V)
Crossover frequencies
350Hz, 4kHz
350Hz, 4kHz
Recommended amplifier power
50W – 1000W into 8V on unclipped programme
50W – 500W into 8V on unclipped programme
Max. recommended cable impedance
0.1V
0.1V
Dimensions
Height: 1180mm (46.5in) including rollers
Height: 1135mm (44.7in) not including feet
Width: 450mm (17.7in)
Width: 368mm (14.5in)
Depth: 645mm (25.4in)
Depth: 563mm (22.2in)
72kg (159 lb)
Net weight
102kg (225 lb)
Finishes
Cabinet: Cherrywood
Cabinet: Cherrywood
Rosenut
Rosenut
Piano Black Gloss
Piano Black Gloss
Grille: Black cloth
Grille: Black cloth
803 Diamond
804 Diamond
Free-mounted diamond dome tweeter
Free-mounted diamond dome tweeter
Nautilus tube tweeter loading
Nautilus tube tweeter loading
Quad magnet tweeter motor
Quad magnet tweeter motor
Kevlar brand fibre cone FST midrange
Kevlar brand fibre cone FST midrange
Rohacell cone bass
Rohacell cone bass
Dual magnet bass driver motor
Dual magnet bass driver motor
Matrix cabinet
Matrix cabinet
Flowport
Flowport
Description
3-way vented-box system
3-way vented-box system
Drive Units
1x ø25mm (1in) diamond dome high-frequency
1x ø25mm (1in) diamond dome high-frequency
1x ø150mm (6in) woven Kevlar cone FST midrange
1x ø150mm (6in) woven Kevlar cone FST midrange
3x ø180mm (7in) Rohacell cone bass
2x ø165mm (6.5in) Rohacell cone bass
Frequency range
-6dB at 28Hz and 33kHz
-6dB at 30Hz and 33kHz
Frequency response
35Hz – 28kHz ±3dB on reference axis
38Hz - 28kHz ±3dB on reference axis
Dispersion
Within 2dB of reference response
Within 2dB of reference response
Horizontal:
over 60º arc
Horizontal:
over 60º arc
Vertical:
over 10º arc
Vertical:
over 10º arc
Technical features
Sensitivity
90dB spl (2.83V, 1m)
90dB spl (2.83V, 1m)
Harmonic distortion
2nd and 3rd harmonics (90dB, 1m)
2nd and 3rd harmonics (90dB, 1m)
<1% 50Hz – 100kHz
<1% 90Hz – 100kHz
<0.5% 90Hz – 100kHz
<0.5% 120Hz – 100kHz
Nominal impedance
8V (minimum 3.0V)
8V (minimum 3.0V)
Crossover frequencies
350Hz, 4kHz
350Hz, 4kHz
Recommended amplifier power
50W – 500W into 8V on unclipped programme
50W – 200W into 8V on unclipped programme
Max. recommended cable impedance
0.1V
0.1V
Dimensions
Height: 1164mm (45.8in) not including feet
Height: 1020mm (40.2in) not including feet
Width: 306mm (12in)
Width: 238mm (9.4in)
Depth: 457mm (18in)
Depth: 351mm (13.8in)
Net weight
41kg (90 lb)
Finishes
Cabinet: Cherrywood
Cabinet: Cherrywood
Rosenut
Rosenut
Piano Black Gloss
Piano Black Gloss
Grille: Black cloth
Grille: Black cloth
27kg (59 lb)
Technical features
805 Diamond
HTM2 Diamond
Free-mounted diamond dome tweeter
Free-mounted diamond dome tweeter
Nautilus tube tweeter loading
Nautilus tube tweeter loading
Quad magnet tweeter motor
Quad magnet tweeter motor
Kevlar brand fibre cone bass/midrange
Kevlar brand fibre cone FST midrange
Matrix cabinet
Rohacell cone bass
Flowport
Dual magnet bass driver motor
Matrix cabinet
Flowport
Description
2-way vented-box system
3-way vented-box system
Drive Units
1x ø25mm (1in) diamond dome high-frequency
1x ø25mm (1in) diamond dome high-frequency
1x ø165mm (6.5in) woven Kevlar cone bass/midrange
1x ø150mm (6in) woven Kevlar cone FST midrange
2x ø180mm (7in) Rohacell cone bass
Frequency range
-6dB at 42Hz and 33kHz
-6dB at 35Hz and 33kHz
Frequency response
49Hz – 28kHz ±3dB on reference axis
41Hz – 28kHz ±3dB on reference axis
Dispersion
Within 2dB of reference response
Within 2dB of reference response
Horizontal:
over 60º arc
Horizontal:
over 60º arc
Vertical:
over 10º arc
Vertical:
over 10º arc
Sensitivity
88dB spl (2.83V, 1m)
90dB spl (2.83V, 1m)
Harmonic distortion
2nd and 3rd harmonics (90dB, 1m)
2nd and 3rd harmonics (90dB, 1m)
<1% 100Hz – 100kHz
<1% 80Hz – 100kHz
<0.5% 150Hz – 100kHz
<0.5% 100Hz – 100kHz
Nominal impedance
8V (minimum 4.7V)
8V (minimum 3.1V)
Crossover frequencies
4kHz
350Hz, 4kHz
Recommended amplifier power
50W – 120W into 8V on unclipped programme
50W – 300W into 8V on unclipped programme
Max. recommended cable impedance
0.1V
0.1V
Dimensions
Height: 418mm (16.5in)
Height: 329mm (13in)
Width: 238mm (9.4in)
Width: 841mm (33.1in)
Depth: 351mm (13.8in)
Depth: 387mm (15.2in)
31kg (68 lb)
Net weight
12kg (26 lb)
Finishes
Cabinet: Cherrywood
Cabinet: Cherrywood
Rosenut
Rosenut
Piano Black Gloss
Piano Black Gloss
Grille: Black cloth
Grille: Black cloth
DB1
HTM4 Diamond
Technical features
Free-mounted diamond dome tweeter
Technical features
Rohacell cone drivers
Nautilus tube tweeter loading
Balanced drive
Quad magnet tweeter motor
Digital Signal Processing
Kevlar brand fibre cone bass/midrange
Room acoustics compensation
1000W Class-D amplifier
Matrix cabinet
Flowport
Description
Active balanced-drive closed-box subwoofer system
Description
2-way vented-box system
Drive Units
2x ø300mm (12in) Rohacell cone long-throw
Drive Units
1x ø25mm (1in) diamond dome high-frequency
Frequency range
-6dB at 15Hz and 250Hz
Frequency response
±3dB 17Hz – 145Hz
Amplifier power output
1000W continuous
Rated power consumption
300W
Standby power consumption
1W
Input impedance
15k
1x ø165mm (6.5in) woven Kevlar cone bass/midrange
Frequency range
-6dB at 42Hz and 33kHz
Frequency response
49Hz – 28kHz ±3dB on reference axis
Dispersion
Within 2dB of reference response
Horizontal:
over 60º arc
Vertical:
over 10º arc
Sensitivity
88dB spl (2.83V, 1m)
Signal/noise
>100dB
Harmonic distortion
2nd and 3rd harmonics (90dB, 1m)
Functions
5 Presets
<1% 100Hz – 100kHz
Input sensitivity
<0.5% 150Hz – 100kHz
Gain
Nominal impedance
8V (minimum 4.7V)
Crossover frequencies
4kHz
Recommended amplifier power
50W – 120W into 8V on unclipped programme
Max. recommended cable impedance
0.1V
Dimensions
Height: 279mm (11in)
Width: 486mm (19.1in)
Depth: 287mm (11.3in)
Low-pass filter frequency slope
phase
Graphic equalisation
Room compensation
Net weight
12.5kg (27 lb)
Finishes
Cabinet: Cherrywood
Rosenut
Piano Black Gloss
Grille: Black cloth
Auto on/standby
Trigger on/standby
Trigger preset switching
RS-232 automation control
Inputs
Stereo Line In (2x RCA Phono)
Mono (LFE) Line In (RCA Phono)
Mono (LFE) Line In (XLR balanced)
Dimensions
Height: 490mm (19.3in)
Width: 460mm (18.1in)
Depth: 410mm (16.2in)
Net weight
44kg (97lb)
Cabinet finish
Cherrywood
Rosenut
Gloss black
Grille
Black cloth
01/10 PU23175
www.bowers-wilkins.com
Kevlar is a registered trademark of DuPont.
Rohacell is a registered trademark of Röhm
GmbH & Co. KG. Marlan is a registered
trademark of Polylac Holland bv. FST, Nautilus, Flowport and Matrix are trademarks of B&W Group Ltd.
Copyright © B&W Group Ltd. Stands featured within this brochure are not supplied with the speakers. E&OE. Design by Thomas Manss & Company.
Production by Mibrand. Printed in UK.
B&W Group Ltd reserves the right to amend details of the specifications without notice in line with technical developments.