KS DIGITAL D Series User manual

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MANUAL
D-Line
ENGLISH

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1. Please read these instructions before using this device, which cover the safety and operation of the D-Series powered
speaker system. All tips and instructions explained in this manual will maximize your results when using the monitors.
2. Please keep these instructions, as you may need them in the future.
3. All warnings mentioned on the product or in this manual should be respected for your own protection—please heed all
warnings!
4. This product should not be operated in humid environments, or near water or moisture (for example, in bathrooms or
next to a swimming pool, etc.) as there is danger of electric shock.
5. This KSdigital product must be installed to allow the necessary ventilation (for example, the device may not be operated
on a bed, sofa, rug, or similar surfaces which may cover the heat sink).
6. Do not place this unit on or near a radiator or similar heat sources.
7. The unit is designed for use with an AC voltage of AC230V / 50Hz or AC115V / 60Hz (excluded D808). Never operate the
unit with a different voltage.
8. Power supply cords should be routed so that you do not step on them or bend them. In particular, pay attention to the
transitions between the cable and the plug.
9. Make sure no objects or liquids penetrate the enclosure.
10. This KSdigital product should be serviced or repaired only by qualified service personnel.
11. Please do not attempt to open, service, or repair the device, unless described in this manual. Any unauthorized opening
of the unit voids any guarantee / warranty claims. Please contact KSdigital for any service needs.
12. To prevent electric shocks do not operate the power cord with an extension cord, as there may be current-carrying con-
tacts accessible.
13. Please ensure the electrical outlet and circuit used to power this KSdigital product has proper grounding.
14. This product is designed for the playback of analog audio signals. Any form of operation that does not conform with this
product’s intention and original design will void the warranty and may result in danger to life from electric shock.
Warning: Toprevent electric shock, these speakers must not be exposed to rain or moisture.
KS Digital Non-Transferrable Limited Warranty
Warranty: KS Digital warrants the product to be free from defects in material and workmanship for a period
of one (1) year from the original date of purchase.
If the product fails wihtin the warranty period, KS Digital will repair or, at our discretion, replace the product
at no cost to the original purchaser.
Exclusions: This warranty covers defects in manufacturing discovered while using this product as recom-
mended by KS Digital. This warranty does not cover loss or theft, or does the coverage extend to damage
caused by misuse, abuse, unauthorized modification, improper storage, lightning, or natural disasters.
Limits of Liability: In the case of malfunction, the purchaser´s sole recourse shall be repair or replacement,
as described in the preceding paragraphs. KS Digital will not be held liable to any party for damages that
result from the failure of this product. Damages excluded include, but are not limited to, the following: lost
profits, lost savings, damage to other equipment, and incidental or consequential damages arising from the
use, or inability to use this product. In no event will KS Digital be liable for more than the amount of the
purchase price, not to exceed the current retail price of the product. KS Digital disclaims any other war-
ranties, express or implied. By using the product, the user accepts all terms herein.
How to obtain service under this warranty: For international customers: contact the KS Digital dealer from
which the product was purchased from in order to arrange warranty repair service.
Safety Regulations

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Safety regulations / Warranty......................................2
Table of Contents...........................................................3
D-Line conception and performance............................4
Controls.........................................................................6
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Signal path diagram......................................................12
Recommended Speaker Set Up.....................................13
Table of Contents

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Thank you very much for choosing a KSdigital monitor
For nearly 20 years, KSdigital has been designing world-class studio monitors, with the goal of repro-
ducing only the transparent, undistorted, true impulse of the music signal. KSdigital products can be
found in the control rooms of top producers, broadcast studios, and mixing / mastering facilities world-
wide. Designed to the utmost specifications of absolute sound neutrality, the monitors of the ADM Series,
C Series, and the new D-Line are uncompromising tools for judging your audio productions in the studio.
Consistency in Design
With the development of the new D-Line, KS has designed monitors that are 100% accurate to the correct
time transmission of the audio signal. When an impulse is accurately reproduced over time, this is equi-
valent to a linear frequency and phase response. This high level of accuracy in the impulse response
comes from drivers specifically developed by KSdigital, in combination with our FIRTEC ™ advanced FIR
filtering found in our own proprietary onboard DSP. The result is that KS has achieved complete sound
neutrality and accuracy in speaker reproduction.
The Coax Series - The Concept
As already established in the successful C Series, the key design feature in the D-Line is the coaxial
construction of the mid-bass driver and high-performance tweeter. This design creates the ideal point
source—without any offset in the horizontal or vertical planes, the listening position achieves the optimal
frequency and phase response. The high frequency horn directs the upper frequency energy directly to
the ear and avoids to a large extent any room reflections. In addition, the reference-quality low frequency
driver prevents any frequency or phase anomalies across the bass range, so the D-Line can reproduce
incredibly high volumes without any of the typical distortion or fatigue found in similar nearfield or mid-
field studio monitors. By using high quality materials such as carbon fiber for the low / mid drivers, a
D-Line monitor provides an exceptionally accurate reproduction of music and speech for its given size.
The powerful built-in amplifiers provide a direct conversion of the electrical signal into pure sound per-
formance. The additional bass driver, with its own dedicated amplifier in the D606 and D808 models,
transmits absolutely accurate bass signals with wavelengths between 10m and 3m (roughly 30 feet and
10 feet). In these larger monitors, the offset between the coaxial chassis and woofer is negligibly small
(only 20cm, or 8”), so even this added component supports the principle of the coax design. The additional
amplifier and extended membrane surface in the CAD-tuned 606 / 808 enclosure create an extremely
accurate, distortion-free, transient-true low bass that allows for the optimal judgement of the sub fre-
quency range of a mix. Whether used as a high quality nearfield monitor in an audio or video editing suite,
as a bridge monitor at a mixing console, or even as a main monitor, the speakers of the D-Line Coax
Series are the ideal tools of choice.
The Digital Signal Processing Aspect
The digital signal processing of the D-Line is based on three filter levels:
1. A phase and impulse EQ filter system: FIRTEC™, to correct the frequency and phase response of each
studio monitor to exacting phase linear standards
2. A ruler-flat digital crossover stage which decouples the woofer / midrange and tweeter at 1.6 kHz
3. A high-pass filter which protects the chassis of the bass / midrange from potentially damaging fre-
quencies that are too low.
This combination ensures the greatest linearity in frequency and phase response, and best supports the
concept of a true point source.
D-Line conception and performance

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The Chassis
The principle design—the coaxial chassis—creates the ideal point source. It allows all frequencies to
radiate from one location, without internal phase shifts and regardless of where you are located within the
defined dispersion angle. The carbon fiber cone of the 8” mid / woofer in the D80 and D808 contributes
to this maxim. Carbon fiber is both an extremely stiff and incredibly light material—it ensures clean bass
and high impulse fidelity, without any distortion. For it’s size, the 6.5” mid / woofer of the D60 and D606
reproduces incredibly accurate and deep low frequencies. This low-frequency coated paper driver is
highly damped internally to prevent partial oscillations. The 1” high frequency compression driver ope-
rates through the “pierced heart” of the woofer directly to a stationary horn. This construction prevents
any modulation of the high frequency signal by the movement of the woofer (the Doppler effect). At the
same time, this accurately directs the sound energy toward the listening position, leading to a conside-
rable improvement of the direct sound to room reflection ratio. The mechanical structure of the 1” HF
driver is designed for high volume reproduction, which is no challenge for the D-Line—they can be run
extremely loud with extremely low distortion.
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In the D-Line, the “KSd Class A” type PWM power amplifiers are directly connected to the DSP. By this
direct coupling of the output stages of the DSP to the power amps, a separate D to A conversion is avoided.
A standard D/A converter section is not needed (as is done by other manufacturers in their DSP speakers),
as KS utilizes its own proprietary design that happens between the amp and speaker stage.
„KSd Class A“ Operation
Conventional PWM amplifier designs produce non-linearities even at their lowest volumes. This means
that in each zero crossing of the signal, the distortion increases. The technology and implementation of
the KS PWM design in the D-Line avoids this disadvantage and reverses this ratio. At zero modulation,
the output stage will work with the least distortion values and lowest THD. While this design slightly
increases the heat loss of the amplifier, it leads to a significantly better audiophile quality in the playback.
RESET:
The monitors of the D-Line have a total of five filters that are adjustable by the user. The two on the
front panel give direct access to the High and Low shelving equalizers. Three additional parametric EQs
are accessible and adjustable through the optional RC-100 Remote Control, or the optional FIR W-Lan
software. To return all filters to their linear position, one can reset the speakers to their default factory
setting. Switch the speaker off and turn all three rotary knobs on the front panel all the way to the left.
Switching the speaker on will now reset the parameters. Turning the knobs to the 12 o’clock position will
then reset the speaker to the default factory (neutral) setting.
D-Line conception and performance

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Controls
Controls on the back:
1. Remote Control: Remote Control RJ45 socket to connect KSdigital‘s proprietary remote control RC-100
or FIR W-Lan remote control software (an exclusive KS 2-to-1 connection cable is used to connect two
speakers to one remote control).
2. Analog In: Analog signal input, XLR balanced with + 4dBv input sensitivity.
3. Power supply: 230V IEC power socket with wide input voltage range, between 100V and 240V AC, sui-
table for use world-wide. ([FOXGHGWKH'7KH'LVRQO\XVDEOHZLWKWKHYROWDJHODEHOHGDWWKH
back plate.
Heat Sink:
The D-Line studio monitor has two (D60, D80) or three (D606, D808) powerful amplifiers with a
maximum output power of more than 200 Watts per amplifier. The heat sink will be warm during
operation, and must not be blocked or covered—please provide good ventilation around the speaker,
especially the back section. Depending on the operating time, the ambient temperature, and the
volume levels, the heat sink may reach up to 45 degrees Celsius (113 degrees Fahrenheit).
1 2 3

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Controls
Controls on the front:
1. High – adjust to compensate for shortcomings in the high frequency (treble)
range of your room acoustics. This controller provides a range of +/- 6dB
and is designed as a shelving filter (see the graphic on the back of the
speaker for reference).
2. Low – adjust to compensate for shortcomings in the low frequency (bass)
range of your room acoustics. This controller provides a range of +/- 6dB
and is designed as a shelving filter (again, see the graphic on the back of
the speaker for reference).
3. Vol – the volume sensitivity control has a range of +/- 6dB, to adjust your
studio monitor to different input levels if needed. Turning clockwise
increases the volume.
4. LED – the blue LED indicates that your studio monitor is turned on.
5. Main switch – the On / Off switch disconnects your studio monitor fully from
power. No power is consumed when the switch is in the O position.

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D60 The most compact of the new D-Line, featuring fully digital
linear phase FIRTEC™ equalization. For use in the mobile studio, and suitable as a console
meter bridge monitor or nearfield at your workstation.
D606 Three-way Coaxial Studio Monitor
The ' is the #1 tool for covering ranges from midfield to main nearfield monitor. From the
deepest, most accurate bass to brilliant, transparent treble, it also features the most accurate
panoramic imaging available today. This is studio monitoring at the highest resolution!

TECHNICAL
SPECIFICATIONS:
ZEITFILTER TECHNOLOGIE
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Technical Specifications:

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D808
The '&RD[, with substantially more volume and membrane surface than the ', allows
for an extended low frequency response and higher volume. The ' may look like a compact
speaker, but it functions perfectly as a full-range nearfield monitor. Its extreme accuracy lets
you make the proper mixing decisions, across any genre of music or post work.
Three-way Coaxial
Reference Studio Monitor
The ' is the premier monitor in the D Line, which operates as the ultimate nearfield or
midfield studio monitor, commanding an impressive presence even at extended listening
distances. In every application, the '-Coax performs with pinpoint precision, even at high
volumes due to its immense membrane surface. The bass response is incredibly accurate at
any level, and the high-performance tweeter ensures extremely low distortion and a perfectly
defined high frequency range. In conjunction with its KS phase-linear FIRTEC™ technology,
the ' is the pinnacle of the D-Line.