KV2 Audio KVV 987 302 User manual

User Guide
SDD3
The Future of Sound.
Made Perfectly Clear.
At KV2 Audio our vision is to constantly develop technologies
that eliminate distortion and loss of information providing
a true dynamic representation of the source.
Our aim is to create audio products that absorb you,
place you within the performance and deliver a listening
experience beyond expectations.
Super Digital Delay Line

SDD3 · Important Safety Instructions
SDD3 · Important Safety Instructions
Important Safety Instructions
Before using your SDD3, be sure to carefully read the applicable items of these operating instructions and the safety
suggestions.
1. Read all product instructions.
2. Keep printed instructions, do not throw away.
3. Respect and review all warnings.
4. Follow all instructions.
5. Do not use this unit near water, in unprotected out door areas or in rain or wet conditions.
6. Clean only with dry cloth.
7. Do not block any ventilation openings.
8. Install in accordance with KV2 Audio's recommended installation instructions.
9. Do not install near any heat sources such as heat radiators, heat registers, stoves or other apparatus that produce heat.
10. Do not defeat the safety purpose of the grounding type plug. A grounding type plug has two blades and a third
grounding connector. The third connector is provided for your safety. If the provided plug does not t into your
outlet, consult an electrician for replacement of the obsolete outlet.
11. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles and the point
where they exit from the SDD3. The AC mains plug or appliance coupler shall remain readily accessible for operation.
12. Only use accessories specied by KV2 Audio.
13. The unit is intended for use in a 19" rack. Follow the mounting instructions.
14. Unplug SDD3 during lightning storms or when unused for long periods of time.
15. Refer all servicing to qualied service personnel. Servicing is required when the SDD3 has been damaged in any way,
such as when the power-supply cord or plug has been damaged; liquid has been spilled or objects have fallen into
the SDD3; rain or moisture has entered the SDD3; the SDD3 has been dropped; or when for undetermined reasons
the SDD3 does not operate normally.
16. Do not remove top or bottom covers. Removal of the cover will expose hazardous voltages. There are no user
serviceable parts inside and removable may void the warranty.
17. An experienced user shall always supervise this professional audio equipment.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER.
NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
WARNING: To prevent re or electric shock, do not expose this equipment to rain or moisture.

SDD3 · Contents
SDD3 · Contents
Introduction 3
Introduction 3
Dimensions 3
Getting Started 4
Unpacking 4
Rack mounting 4
AC Power requirements 4
Voltage requirements 4
Connector wiring 4
Features 5
Front Panel 5 - 6
Rear Panel 7
Using the System 8 - 9
Setup 10
Digital part description 10
Menu 11
Subwoofer mode 12
Memory 13
Lock 14
Display 15
Block Diagram 16
Dimensions 17
Input Cables and Output Cables 18
Specications 19
Warranty · Service 20
Contents

3
200.5 mm
200.5 mm
SDD3 · Introduction
SDD3 · Introduction
Introduction
The SDD3 is a 2 channel full range stereo audio delay line, with one dedicated channel subwoofer delay line.
Full range channels are specically for delaying audio signals for main PA systems or side lls, with a maximum delay time
of 393, 216ms (approx 134m / 442ft).
Each channel is equipped with a tunable high pass lter for easy side lls setup.
The full range channels use super digital technology with wide bandwidth and enhanced dynamic range. For optimal analog
to digital converter driving, the full range channels are equipped with ADC sensitivity control, which increases input level
and reduces output level at the same time, so the level pass in the SDD3 does not change when adjusting the ADC sensitivity.
The input level can be seen on the level meters. Output level can be set in the range from -10 to +10dB.
The subwoofer channel is dedicated for delaying subwoofers with a bandwidth of 0 to 120Hz and maximum delay time
of 10ms (approx 3,43m / 11,25ft).
The subwoofer channel has two independent outputs which can be linked together for easy cardioid setup. The subwoofer
channel is designed like a digitally controlled analog unit. The output level can be set in the range from -10 to +10dB.
Each audio input has parallel outputs for easy audio device branching. Each audio output features line drivers to maintain
audio signal integrity over long cable lengths. Each output is equipped with a phase reverse switch and a true bypass feature.
When the device is switched o, all channels are bypassed.
SDD3 - part number KVV 987 302 (230V)
KVV 987 303 (115V)
Front Panel:
Side Panel:
482.6 mm
482.6 mm
Dimensions
Application
Especially designed as a super high quality audio
delay line
• Fixed installations
• Live music and performance
• Can be used to enhance the performance of third
party systems
Rear Panel:
200.5 mm
200.5 mm

4
SDD3 · Getting Started
SDD3 · Getting Started
Rack mounting
The SDD3 will mount in a standard 19”rack system. Use four screws and washers to mount the SDD3 to the rack rails.
We recommend using a shock-mounted rack for touring use to prolong the life of your SDD3.
To prevent accidental adjustment of settings, or unwanted tampering in a xed installation, KV2 Audio provide an additional
security panel as an accessory.
AC Power requirements
The SDD3 uses a standard IEC 3-pole AC connector. The device must be connected to a mains socket outlet with protective
earthing connection. The SDD3 operates in either 115V or 230V mode. This setup is precongured at the factory. The mains
plug of the power supply cord shall remain readily operable.
Voltage requirements
The SDD3 operates safely and without audio discontinuity if the AC voltage stays within the operating window of 90V to130V
in 115V mode or 180V to260V when working in 230V mode at 50 or 60Hz.
IF THE ANY LED DOES NOT ILLUMINATE OR THE SYSTEM DOES NOT RESPOND TO AUDIO INPUT REMOVE AC POWER
IMMEDIATELY. VERIFY THAT THE VOLTAGE IS WITHIN THE PROPER RANGE. IF THE PROBLEM PERSISTS, PLEASE CONTACT
KV2 AUDIO OR AN AUTHORIZED SERVICE CENTER.
Connector wiring
XLR Balanced Input and Output connectors.
IF IT IS NECESSARY TO CONVERT BALANCED OUTPUT TO UNBALANCED, IT IS IMPOSSIBLE TO SHORT HOT2 OR COLD3
PINS WITH GROUND1. IN THIS EVENT THE LINE DRIVERS WILL CAUSE PERMANENT DISCONNECTION.
FOR MORE INFORMATION PLEASE REFER TO PAGE 18.
1 = Ground
2 = Hot (+)
3 = Cold (-)
Unpacking
Unpack the SDD3 and check to see if there is any damage to it. If you nd any damage notify your supplier immediately.
Only the consignee may institute a claim with the carrier for any damage incurred during shipping. Be sure to save the carton
and all packaging materials for the carrier’s inspection.
Should you ever need to ship the unit, only use the original factory packaging. If the shipping carton is unavailable, contact
your supplier to obtain a replacement.
The SDD3 carton should contain:
• SDD3SuperDigitalAudioDelay
• User'sGuide
• IECPowerCable

5
SDD3 · Features · Front panel
SDD3 · Features · Front panel
Front Panel
Channel A and B
ADC sensitivity
For optimal analog to digital converter driving, the full range channels
(A and B) are equipped with ADC sensitivity control which increases
input level and reduces output level at the same time, so the level pass
in the SDD3 does not change when adjustings the ADC sensitivity.
The input level can be seen on the level meters. For optimal ADC
driving run the level meters so that the signal will exceed 0dB meter
level, but never reaches clip level.
High Pass Filter
The full range channels (A and B) are equipped with a tunable high pass lter lter from 0 to 160Hz. It has a slope of 12dB/
octave and it is used for easy and optimal setup for side lls, or to protect your subwoofer system from the frequencies that
cannot reproduce eciently and may cause damage.
Output level
The output level can be set in range from -10 to +10dB.
Subwoofer channel C
Output level
The output level can be set in range from -10 to +10dB.
Phase
Each output is equipped with a phase reverse switch, which reverses
the phase of the output signal.
Phase
Each output is equipped with a phase reverse switch, which reverses the phase of the output signal.

6
SDD3 · Features · Front panel
SDD3 · Features · Front panel
Front Panel
Display
Indicates the input levels for each channel
separately. Shows the set delays and allows
settings of various functions in the menu.
Function / Exit button
Allows the operator to toggle between three main screeens - LEVELS, DELAY, MENU. When you are inside the menu, the button
serves as exit.
Channel / Next button
This button switches between channels, the selected channel is indicated by green LED indicators. When you are inside
the menu, this button serves as a skip to the next menu item.
Rotation encoder with Enter pustbutton
The encoder serves as the main way for increasing (clockwise), or decreasing (counterclockwise) values and menu positions.
The encoder also serves as the ENTER button, alloving the operator to enter/leave the submenu in the main menu.
When the DELAY main screen is selected, the Enter button changes the math point digits.
Bypass button
When the bypass button is pressed, all channels are bypassed, (true bypass). When bypassed, the function is indicated by
the red LED light above this button.

7
SDD3 · Features · Rear panel
SDD3 · Features · Rear panel
Rear Panel
Power Connection
Plug power connector
For connection to a standard IEC 3-pole AC connector.
Before connecting make sure that the mains voltage
corresponds to the SDD3's voltage requirements as stated
on the unit.
Power switch
Used to turn the SDD3 on or o.
Subwoofer Channel Connectors
Input
Balanced female - XLR connector for connecting
the subwoofer signal. The audio input circuit presents
a 20kΩ balanced input impedance.
Output
The through / output balanced male - XLR connector, wired in parrallel to the audio input, will continue to provide the input
signal if the SDD is turned o.
Delay output
Two separated subwoofer outputs with balanced male - XLR connectors. The max. allowed output frequency is 120Hz.
When using the subwoofer channel in normal mode SUB1 and SUB2 delay outputs are separated. When using the subwoofer
channel in cardioid mode, output SUB1/FRONT serves as the front subwoofer output and SUB2/REAR serves as the rear
cardioid subwoofer output. In cardioid mode the delay setup is linked together for determined and easy cardioid setup.
For more information about cardioid setup, please refer to the Cardioid setup part of this guide.
Full Range CHannels (A and B) Connectors
Input
Balanced female - XLR connector for connecting full range
signal. The audio input circuit presents a 20kΩ balanced
input impedance.
Output
The through / output balanced male - XLR connector, wired in parrallel to the audio input, will continue to provide the input
signal if the SDD is turned o.
Delay output
Delayed output with balanced male - XLR connectors.
Reset
Pressing this button resets the SDD3 to factory setup.

8
SDD3 · Using the System
SDD3 · Using the System
Delay for additional PA / ll-in delay, with mono cardioid subwoofers in center
The main PA works directly, without delay. The left and right channel of the secondary, or side-ll PA works through the full
range channels of the SDD3, (channel A and B) for proper time alingment with the main PA. Subwoofers are in the center
and work in mono, cardioid mode.
When using this system, it is possible to move in time (change the distance) of sidells and the mono subwoofers in cardioid
mode compared to the main PA.

9
SDD3 · Using the System
SDD3 · Using the System
Delay for main mono PA, delay for additional PA / mono ll-in delay, with stereo cardioid
One SDD3 controls one channel of the system, the second channel controls the second SDD3 unit.
The main PA works through SDD3 channel A to delay the PA for optimal time alingment with the stage position.
The secondary, or side-ll PA works through the full range channel B of SDD3 for proper time alingment with the main PA.
Subwoofers work in stereo, cardioid or normal mode.
When using this system, it is possible to move separately in time, (change distance) of the main PA, sidells and subwoofers
compared to the stage position.

10
SDD3 · Setup
SDD3 · Setup
Digital part description
The SDD3 has three main display screens for setup and input levels indication. Main screens are: LEVEL - for input levels
indications, DELAY for delay setup and MENU for attributes settings. For switching between these screens use FUNC/EXIT
button.
Level
For optimal analog to digital converter driving the full
range channels (channel A and B) are equipped with ADC
sensitivity control which increases input level and reduces
output level at the same time, so the level pass in the SDD3
is not changing when adjusting the ADC sensitivity. ADC
sensitivity allows the optimal setup of signal to noise ratio.
The input level can be seen on the input level meters
indicators. For optimal ADC driving run the level meters
so that the signal will exceed 0dB meter level, but never
reaches clip level. Level meters are equipped with peak
memory and 2 seconds auto reset.
Delay
Delay can be set for each channel individually, delays
can be set in time or distance. Required delay is set by
changing numbers on math point position. Delay numbers
are changed by rotating the rotary encoder. Math position
is changed by pushing the rotary encoder (ENTER). Delay
changes are reected in real time.
The current selected channel can be switched by pressing
CHAN/NEXT button. The selected channel is incicated
by an LED.
The subwoofer channel can be set in 32 xed steps, with
step increments of 0.31ms. The subwoofer channel has two
outputs, these outputs can be set individually in normal
mode or linked in cardioid mode.
In normal mode, delay can be set in time or distance, in
cardioid mode, delays are set in distance. The distance
between the front and rear cardioid subwoofer is
precalculated by a set cardioid frequency. Cardioid
frequency can be set in the range of 40 to 100Hz.
In cardioid mode cardioid delay is set for the entire
cardioid pair.

SDD3 · Setup
Menu
Units mode
Delay mode
Delay can be set in time (miliseconds) or in distance (meters
or feets depending on Units setup). When switching between
time and distance, the delay time is kept and recalculated
to each other. The delay distance depends on the ambient
temperature.
Units
It is possible to switch between metric (meters, °C )
and imperial (feet, °F) units, when switching between each
other, the distance is maintained.
Link AB
It is possible to link channel A and B delay setup, when both
delays are the same. When switching to Link AB, the delay
of both channels is set by channel A.
Subwoofer mode
Cardioid setup
Bass is usually omnidirectional but by using a cardioid
bass array you can reduce bass feedback on stage and also
minimise noise pollution from events. When using cardioid
mode, the front subwoofer is 1/4 wavelength of the tuned
cardioid frequency in front of the rear subwoofer. The front
subwoofer is fed with a 1/4 wavelength delay compared to
the rear sub. This conguration results in a cardioid polar
response ,(because of addition and subtraction of
the subwoofer signals).
SDD3 · Setup
11
Cardioid polar characteristics
FRONT
SUB
REAR
SUB
Cardioid calculation - example
Subwoofers distance (d) corresponds to 1/4 wavelength
(λ) of the tuned cardioid frequency (f).
Speed of sound (v) varies with temperature, for 20°C
is approx 343m/s.
λ = 1 / 4f
d = v * λ

SDD3 · Setup
Subwoofer mode
For cardioid setup, you can calculate and set the delay for
each subwoofer manually, or you can use cardioid setup in
the SDD3 menu.
For manual - idependent sub outputs setup, use the normal
mode. For cardioid setup use the cardioid mode. When
cardioid mode is selected, the subwoofer outputs are
linked together with λ/4 distance between front and rear
subwoofer outputs.
In cardioid mode, the selected cardioid tuned frequency can
be operated in range from 40Hz to 120Hz with 10Hz steps.
The subwoofer pair's polar characteristics are cardioid on this
frequency, whilst uder and above this frequency the polar
characteristics of the subwoofer pair are omnidirectional
with increasing dierence from cardioid frequency.
The cardioid distance is shown on the cardioid frequency
setup screen.
12
SDD3 · Setup

SDD3 · Setup
Memory
New memory
SDD3 is equipped with a dynamic memory list with up to
30 memory positions. New memory can be created when
pressing ENTER at New in the memory list.
When a new memory is created, it is marked with a position
number from 1 to 30 whilst the memory function select is
switched to the rename position.
Rename memory
Memory name can contain up to 8 letters, space or numbers.
To rename a memory select the memory position to rename
and select rename at the memory function list, press ENTER.
When renaming, the renaming letter ashes, select the
required letter by rotating the encoder. Switch between A - Z,
a - z , spacebar 1 - 9 using CHAN/NEXT button.
To jump to the next letter position, press ENTER.
To exit renaming press FUNC/EXIT button.
When new memory is created the actual setup
is automatically saved.
Save to memory
All delays, units, delay mode, and cardioid setup are saved
into the memory.
To save to memory, select the memory position to save in
and select save from the memory function list, press ENTER.
When saved, the memory number, is shown in the top right
corner.
Memory recall
To recall from memory, select the memory position to recall
and select recall at the memory function list, press ENTER.
When recalled, the memory number, is shown in the top right
corner.
Delete memory
To delete a memory, select the memory position to delete
and select delete in the memory function list, press ENTER.
SDD3 · Setup
13

SDD3 · Setup
Lock
The SDD3 is equipped with an option to lock the setup of
the dital control part. The SDD3 can be locked using four
arbitrary capital letters. When the SDD3 unit is locked, it is
not possible to change digital parameters. LEVEL meters and
delay settings are still visible.
Set the Lock password
To set the lock password enter the Lock menu, select the
Password position and select set at the Lock function list,
press ENTER. Set the requested letter by rotating the encoder.
To jump to the next letter position press ENTER.
To exit renaming press FUNC/EXIT button.
The password must be set complete, with all 4 letters.
Password consists only of capital letters.
Lock now
When the password is set, the SDD3 can be locked
automatically using Autolock function, or manually using
Lock now function.
Autolock
Automatic lock function can be selected between 1min,
10mins, 1hour, or can be switched o. After this time, when
the SDD3 parameters are not being changed, the SDD3 unit
is automatically locked.
Unlock
When locked, the MENU is replaced with unlock screen.
To unlock, set the LOCK screen and set the correct password
letter by rotating the encoder. To jump to the next letter
position press ENTER. When all 4 letters are entered correctly,
the SDD3 will unlock..
Forgotten password
A forgotten password can be deleted by using the RESET
switch at the back of the SDD3. Pressing the RESET button
resets the SDD3 to factory default setup and all previous
memory settings will be deleted back to factory default!
14
SDD3 · Setup

SDD3 · Setup
Display
The SDD3 is equipped with a high-contrast organic - LED
display.
Contrast
The contrast of the display can be set in the range from 10%
to 100% for comfortable use, depending on ambient lighting.
Autodim
To ensure long life of the display, the display automatically
reduce s the contrast when the unit is not currently used.
Temperature
The SDD3 calculates delay distances using the speed of
sound. Speed of sound varies with temperature.
The SDD3 allows the user to set the ambient temperature to
calculate accurate delay settings.
Ambient
The ambient temperature can be set in the range from -20°C
to +40°C with 5°C steps. When the SDD3 units are set to
imperial, the temperature is displayed in °F.
When the SDD3 unit is switched to distance mode, and
the ambient temperature changed, you can select the new
temperature, the delay time is then recalculated to keep the
most consistent distance.
SDD3 · Setup
15

SDD3 · Block Diagram
Block Diagram
16
SDD3 · Block Diagram

SDD3 · Dimensions
17
SDD3 · Dimensions
Dimensions

18
SDD3 · Input and Output Cables
SDD3 · Input Cables and Output Cables
Input Cables and Output Cables
XLR output - XLR input
Pin 2 - Pin 2 (Hot)
Pin 3 - Pin 3 (Cold)
Pin 1 - Pin 1 (Shield)
Jack output (balanced) - XLR input
Tip - Pin 2 (Hot)
Ring - Pin 3 (Cold)
Sleeve - Pin 1 (Shield)
Jack output (unbalanced) - XLR input
Tip - Pin 2 (Signal)
Sleeve - Pin 3 (Shield)
Sleeve - Pin 1 (Shield)
XLR output - XLR input
Pin 2 - Pin 2 (Hot)
Pin 3 - Pin 3 (Cold)
Pin 1 - Pin 1 (Shield)
XLR output - Jack input (balanced)
Pin 2 - Tip (Hot)
Pin 3 - Ring (Cold)
Pin 1 - Sleeve (Shield)
XLR output - Jack input (unbalanced)
Pin 2 - Tip (Signal)
Pin 3 - No Connection
Pin 1 - Sleeve (Shield)
XLR Plugs seen from solder side
SDD3 Input Cables
SDD3 Output Cables

19
SDD3 · Specications
SDD3 · Specications
System Acoustic Perfomance
-1dB Response 2Hz to 40kHz
-10dB Response 2Hz to 100kHz
Sampling Frequency 20MHz, PDM
Dynamic Range >105dB
Channel Crosstalk 90dB
Signal to Noise Ratio 105dB
Total Harmonic Distortion <0.005%
Signal Input
Input Channels 2 Full range + 1 Subwoofer
Input Impedance 20kΩ (balanced)
Max. Input voltage +14dBu
Line input XLR
Signal Output
Signal Output Channels 2 Full range + 2 Subwoofer
Output Impedance 50Ω
Through Signal Output XLR
Delay Signal Output XLR
Features
Level Control -10 / +10dB
Subwoofer Level Control -10 / +10dB
System setup Normal / Cardioid mode
Delay Range 0.012ms to 393.216ms, step 0.003ms
Full Range Mode 2 channels
Phase 0° / 180°
High Pass Filter OFF to 260Hz
Indicators OLED Display
Memory 30
Power Requirements
Power Connector IEC 320
Operating Voltage 115V / 230V
Operating Voltage Range 90 to 130V@60Hz | 180 to 260V@50Hz
Physical Dimensions
Height 44 mm (1.75")
Width 482.6 mm (19.0")
Depth 203 mm (7.9")
Weight 3.6 kg (7.94lbs)
Specications