Kurzweil KS-50A User manual
ii
The lightning flash with the arrowhead symbol, within an equilateral
triangle is intended to alert the user to the presence of uninsulated
"dangerous voltage" within the product's enclosure that may be of
sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended
to alert the user to the presence of important operating and
maintenance (servicing) instructions in the literature
accompanying the product.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
NO USER SERVICEABLE PARTS INSIDE.
DO NOT REMOVE THE COVER.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
IMPORTANT SAFETY & INSTALLATION INSTRUCTIONS
INSTRUCTIONS PERTAINING TO THE RISK OF FIRE ELECTRIC SHOCK , OR INJURY TO PERSONS
WARNING: When using electric products, basic precautions should
always be followed, including the following:
1. Read all the Safety and Installation Instructions and Explanation
of Graphic Symbols before using the product.
2. This product must be grounded. If it should malfunction or
break down, grounding provides a path of least resistance for
electric current to reduce the risk of electric shock. This product
is equipped with a power supply cord having an equipment-
grounding conductor and a grounding plug. The plug must be
plugged into an appropriate outlet which is properly installed and
grounded in accordance with all local codes and ordinances.
DANGER: Improper connection of the equipment-grounding
conductor can result in a risk of electric shock. Do not modify the
adaptor which defeats the function of the equipment-grounding
conductor. If you are in doubt as to whether the product is properly
3. Do not use this product near water – for example, near a bathtub,
washbowl, kitchen sink, in a wet basement, or near a swimming
pool, or the like.
4. This product should only be used with a stand or cart that is
recommended by the manufacturer.
5.
speakers or headphones, may be capable of producing sound
levels that could cause permanent hearing loss. Do not operate
for a long period of time at a high volume level or a level that is
uncomfortable. If you experience any hearing loss or ringing in
the ears, you should consult an audiologist.
6. This product should be located so that its location or position
does not interfere with its proper ventilation.
7. The product should be located away from heat sources such as
radiators, heat registers, or other products that produce heat.
8. The product should be connected to a power supply only of the
type described in the operating instructions or as marked on the
product.
9. This product may be equipped with a polarized line plug (one
blade wider than the other). This is a safety feature. If you are
unable to insert the plug into the outlet, contact an electrician to
replace your obsolete outlet. Do not defeat the safety purpose of
the plug.
10. The power supply cord of the product should be unplugged
from the outlet when left unused for a long period of time. When
unplugging the power supply cord, do not pull on the cord, but
grasp it by the plug.
11. Care should be taken so that objects do not fall and liquids are
not spilled into the enclosure through openings.
12.
when:
A. The power supply, power cord or plug have been damaged;
B. Objects have fallen, or liquid has been spilled into the
product;
C. The product has been exposed to rain;
D. The product does not appear to be operating normally or
exhibits a marked change in performance;
E. The product has been dropped, or the enclosure damaged.
13. Do not attempt to service the product beyond that described in
the user maintenance instructions. All other servicing should be
14. WARNING:
cord, or place the product in a position where anyone could trip
over, walk on, or roll anything over cords of any type. Do not
allow the product to rest on or be installed over cords of any type.
hazard and/or personal injury.
RADIO AND TELEVISION INTERFERENCE
WARNING:
approved by Young Chang could void your authority to operate the
instrument.
IMPORTANT: When connecting this product to accessories and/or
other equipment use only high quality shielded cables.
NOTE: This instrument has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This instrument
generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If
this instrument does cause harmful interference to radio or television
reception, which can be determined by turning the instrument off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the instrument and the receiver.
• Connect the instrument into an outlet on a circuit other than the
one to which the receiver is connected.
• If necessary consult your dealer or an experienced radio/television
technician for additional suggestions.
The normal function of the product may be disturbed by strong
electromagnetic interference. If so, simply reset the product to resume
normal operation by following the instructions in the manual. If normal
function does not resume, please use the product in another location.
NOTICE
This apparatus does not exceed the Class B limits for radio noise
emissions from digital apparatus set out in the Radio Interference
Regulations of the Canadian Department of Communications.
AVIS
depassant les limites applicables aux appareils numeriques de la
class B prescrites dans le Reglement sur le brouillage radioelectrique
edicte par le ministere des Communications du Canada.
SAVE THESE INSTRUCTIONS
iv
Kurzweil International Contacts
Contact the Kurzweil oce listed below to locate your local Kurzweil representative.
US Customers:
American Music & Sound
925 Broadbeck Dr #220
Newbury Park, CA 91320
Tel: 800-431-2609
Fax: 818-597-0411
Email: [email protected]
www.kurzweil.com
support@kurzweil.com
www.facebook.com/kurzweilmusicsystems/
www.twitter.com/KurzweilMusic
www.youtube.com/user/KurzweilTutorials
Customers outside the US:
Young Chang Co., LTD.
178-55, Gajwa-Dong, Seo-Ku
Incheon, Korea
Post Code: 404-714
Tel: +82-32-570-1576
Fax: +82-32-576-2340
iv
Kurzweil International Contacts
Contact the Kurzweil oce listed below to locate your local Kurzweil representative.
US Customers:
American Music & Sound
925 Broadbeck Dr #220
Newbury Park, CA 91320
Tel: 800-431-2609
Fax: 818-597-0411
www.kurzweil.com
www.facebook.com/kurzweilmusicsystems/
www.twitter.com/KurzweilMusic
www.youtube.com/user/KurzweilTutorials
Customers outside the US:
Young Chang Co., LTD.
178-55, Gajwa-Dong, Seo-Ku
Incheon, Korea
Post Code: 404-714
Tel: +82-32-570-1576
Fax: +82-32-576-2340
KURZWEIL
KS-50A
INDEX
1. Introduction .................................................................................................................................. 6
2. Basics & Installation .................................................................................................................... 6
Unpacking / Handling ................................................................................................................................................ 6
Connection ................................................................................................................................................................. 6
3. Placement ...................................................................................................................................... 7
Stereo / 2.0 Positioning .............................................................................................................................................. 7
Stereo with Subwoofer / 2.1 Positioning .................................................................................................................... 7
5.1 Positioning ........................................................................................................................................................... 8
7.1 Positioning ........................................................................................................................................................... 8
Orientation ................................................................................................................................................................. 9
Comments .................................................................................................................................................................. 9
4. Technical Data .............................................................................................................................. 9
Specifications ............................................................................................................................................................. 9
Rear Panel ................................................................................................................................................................ 10
5. General Information .................................................................................................................. 11
KURZWEIL
KS-50A
1. Introduction
Congratulations on your purchase of the KURZWEIL KS-50A.
The KS-50A top quality near field reference monitor has been developed especially for high level
home studios and special project studios. They take 5" near field monitoring speakers to a new level,
boasting an ultra-flat low frequency response and a top quality kevlar 5" driver delivering
unparalleled punch in the low-mid frequency a major improvement over the paper and
polypropylene drivers used in most comparable products. KS-50A is perfect to provide the best
output signal and frequency response 100% matching the installed drivers and cabinet design. KS-
50A is magnetically shielded for desktop operation next to your other electronic equipment without
interference.
2. Basics & Installation
For optimal performance of KS-50A, read the instructions in this manual carefully before using the
speakers.
Unpacking / Handling
To remove the monitor from the carton, it is best to turn the package carefully upside down on the
floor or on a table and then lift the carton up slowly to leave the monitor resting in the packaging
foam. To avoid damage, make sure that you don
monitors. Check the monitor for signs of damage that might have occurred in shipping. In the
unlikely event of damage, please contact the reseller of the product immediately. Be careful when
you remove the packaging foam. Please keep all packing materials.
Connection
High quality XLR balanced or TS unbalanced audio cables are recommended for input connection.
The monitor typically connects to the line level output of a mixing console or computer audio card.
Make sure the power of the monitor is switched off before you connect any audio cables. Also turn
down the volume initially.
XLR balanced connection
Connect the male side of a XLR balanced cable to the balanced XLR input of KS-50A. Make sure
the power cable is connected as well. Setup all speakers (i.e. left / right channels) with the same
type of cable.
TS unbalanced connection
Connect a TS unbalanced cable to the input jack of KS-50A. Make sure the power cable is
connected as well. Setup all speakers (i.e. left / right channels) with the same type of cable.
KURZWEIL
KS-50A
3. Placement
The placement of monitoring speakers is very critical and can compromise their performance. This
is a general rule for every loudspeaker. To monitor with KS-50A utilizing their maximum
capabilities, an appropriate listening environment and correct placement are important.
Typically you would be using 2 units of KS-50A as one stereo pair or more in surround setups (i.e.
in a 5.1 setup you would use 5 units of KS-50A together with a subwoofer).
Stereo / 2.0 Positioning
In a stereo setup, the listener and speakers should be positioned in a triangle formation. Please refer
to the following diagram to understand how to position your monitors. Each distance x should be
identical.
Stereo with Subwoofer / 2.1 Positioning
In a stereo setup with an added subwoofer, the subwoofer speaker should be positioned ideally in
the exact middle in front of the listener (with the same distance x). If this is not possible, it should
be as close to that position as possible.
KURZWEIL
KS-50A
5.1 Positioning
In a 5.1 surround set, the center speaker should ideally be placed on top of the subwoofer. If this is
not possible, the subwoofer can be moved to the left or right but should be as close as possible. The
rear surround speakers should be positioned around 110° from the center speaker (all with the same
distance x).
7.1 Positioning
In a 7.1 surround set, the center speaker should also ideally be placed on top of the subwoofer or as
close as possible. The surround speakers are best placed 90° from the center speaker and the back
surround speakers are best placed 135° to 150° from the center speaker. All speakers should be
placed with the same distance x to the listener.
KURZWEIL
KS-50A
Orientation
-50A vertically. Never place them horizontally.
Comments
Please make sure to not place any obstacles that may block the flow of air or that could generate
sound reflections (especially highly reflective material including glass or metal) in front of the
monitor. Al
wall behind the speaker, so as not to block air flow.
4. Technical Data
Please note that technical specifications are subject to change without any prior notice. The specs
given in this manual are up-to-date at the time of the creation of this document.
Specifications
Model:
KS-50A
Type:
2-way powered speaker
System Type:
Active Studio Monitor Speaker
Dimensions:
250mm (H) x 176mm (W) x 200mm (D)
Weight:
4.5kg
HF Driver:
1" silk dome tweeter
LF Driver:
5" kevlar curved cone (magnetic shielding type)
Output Power:
60W (HF 30W, LF 30W), 85W AC consumption power
Working Voltage:
AC100-240V 50/60Hz, with 115V / 230V AC selection switch
Frequency Response:
50 Hz 20kHz
Input Impedance:
23.3 kOhm balanced, 13.3 kOhm unbalanced
Crossover Point:
2.5kHz
SPL:
88dB+/- 3dB
Rated Noise Power:
30 Watt (THD=1%, 4ohm@1kHz)
Input Sensitivity:
75mV@1Watt, 415mV@30Watt
Input Connectors:
XLR / TS1/4" combo connector, balanced / unbalanced input
Volume Control:
min - center - max
Indicator:
power LED on front panel, blue
KURZWEIL
KS-50A
Rear Panel
1. XLR input this connector accepts balanced XLR input connections (optimised for +4dBu).
XLR input is wired like this:
INPUT SIGNAL
XLR CONNECTIONS
+
PIN 2
-
PIN 3
Shield
PIN 1
2. TS input this jack accepts TS input connections, unbalanced (optimised for -10dBV). The TS
input is wired like this:
INPUT SIGNAL
TRS CONNECTIONS
Signal
Tip
Shield
Sleeve
The TS input should not be used with balanced TRS signals. Although this is possible, the input
level will not be correct in that case. For balanced connection, please use a XLR cable whenever
possible.
KURZWEIL
KS-50A
3. Vent Port KS-50A is a vented box speaker system with a vent port on the rear panel. Make
sure you are not blocking the vent port (i.e. by putting the speaker too close to a wall) or the sound
color will be changed.
4. Volume Control Knob Use the volume control knob to set the proper input level from the
sound source. Make sure to setup all speakers accordingly. When set to the center position, the
output level is set to the recommended calibrated level to reach the most optimised dynamic
response (expecting a balanced XLR +4dBu or unbalanced TS -10dBV input signal).
5. Power Switch Use the power switch to power KS-50A on or off.
6. Power Port with Ext. Fuse Use this connector to plug in the power cord that connects to the
power outlet. The connector contains a replaceable fuse (T1AL250V).
7. Power Mode Switch You can select either STANDBY or ON. When set to ON, the unit will
always be turned on. When set to STANDBY, the unit will switch to power saving mode after a
while without any audio signal. The power saving mode is indicated by a red LED on the front
panel (instead of the blue power LED). When there is an audio signal again, regular operation
resumes. Please note that the POWER MODE switch is only available in models sold in certain
countries.
5. General Information
Trademarks
KURZWEIL, KS-50A are trademarks of HDC YOUNG CHANG. Other product and brand names
are trademarks or registered trademarks of their respective companies.
Correspondence
For technical support inquiries, contact your nearest dealer, local distributor or KURZWEIL support
online at www.kurzweil.com.
Disclaimer
All features and specifications subject to change without notice. Please check our web site
www.kurzweil.com for the most recent information.
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