KV2 Audio SAC2 User manual

User Guide
SAC2
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 Analog Controller - 2 channel

SAC2 · Important safety instructions
SAC2 · Important safety instructions
Important safety instructions
Before using your SAC2, 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 rewiew 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 SAC2. 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 SAC2 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 SAC2 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 SAC2; rain or moisture has entered the SAC2; the SAC2 has been dropped; or when for undetermined
reasons the SAC2 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.

SAC2 · Contents
SAC2 · 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
Stereo Master EQ 8
2-Way Stereo Crossover 9
2-Way Stereo Crossover with mono Subwoofer 10
Block Diagram 11
Input Cables and Output Cables 12
Specications 13
Warranty · Service 14
Notes 15 - 16
Contents

3
SAC2 · Introduction
SAC2 · Introduction
Introduction
The SAC2 is a 2 input x 4 output audio controller designed for use with KV2 audio passive and active loudspeakers as well as
third party systems. The SAC2 serves as a 2-way stereo crossover, Master EQ, leveller / limiter, or a combination of all three.
The xed crossover points of either 70Hz or 120Hz can be selected for standard 2 x 2 way conguration, whilst both Low
and High outputs can be independently switched into direct mode, allowing combined crossover, overlap and full range
operation. The Low section also features a special Sub EQ low frequency enhancement circuit that can be switched in or out
as desired.
The SAC2's main advantage is its very high audio quality using only KV2 Audio's new Super Analog technology. The limiter /
leveller is a sophisticated circuit operating in a way that stops the maximum level being exceeded but without the overall
operating level but operators still require the highest quality audio performance. The master equalisation section features
a new Super Analog four band equalisation circuit across the stereo channels as well feedback issues.
For the best performance where possible use only KV2 Audio components, any other component may negatively aect the
sound quality.
SAC2 - part number KVV 987 228 (230V)
KVV 987 229 (115V)
Front Panel:
Rear Panel:
Side Panel:
434 mm
200.5 mm
Dimensions
Application
Designed as an active crossover – equalizer - limiter
and controller for the ESD range with superior sound
quality
• Fixed Installations
• Portable PA
• Speaker protection and level control
• Use with any KV2 Audio system as a FOH EQ
or with any alternative systems

4
SAC2 · Getting Started
SAC2 · Getting Started
Unpacking
Unpack the SAC2 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 SAC2 carton should contain:
• SAC2SuperAnalogueController
• User'sGuide
• IECPowerCable
Rack mounting
The SAC2 will mount in a standard 19" rack system. Use four screws and washers to mount the SAC2 to the rack rails. We
recommend using a shock-mounted rack for touring use to prolong the life of your SAC2.
To prevent accidental adjustment of settings, or unwanted tampering in a xed installation, KV2 Audio provide an additional
security panel.
AC Power requirements
The SAC2 uses a standard IEC 3-pole AC connector. The device must be connected to a mains socket outlet with protective
earthing connection. The SAC2 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 SAC2 operates safely and without audio discontinuity if the AC voltage stays within the operating window of 90V-130V in
115V mode or 180V-260V when working in 230V mode at 50 or 60Hz.
CAUTION: IF THE ON 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
CAUTION: 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.
1 = Ground
2 = Hot (+)
3 = Cold (-)

5
SAC2 · Features · Front panel
SAC2 · Features · Front panel
Front Panel
Gain
Adjusts the SAC2‘s input levels from -15dB to +10dB.
Limiter
Adjusts the maximum output level. When this level is exceeded,
the limiter reduces the signal to the desired level according to your
setting.
The Limiter ensures that this level is not exceeded whilst maintaining
the dynamics and signal quality.
A switch by the input connector allows the user to adjust the limiter
time (fast or slow). It adjusts the attack and decay together.
The Limiter level can be adjusted from -15dB to +10dB.
The Limiter function is indicated by Active LED.
High Pass Filter
This switch selects between either a 20Hz or 40Hz high pass lter. It has a slope of 12dB/octave and it is used to protect your
subwoofer system from the frequencies that it cannot reproduce eciently and may cause damage.
Four-Band Equalizer
The four-band EQ section is a unique Super Analog
equalization circuit specially designed to highlight the desired
band without adversely aecting the overall sound.
Notch Filters
Use independent left and right notch lters to quickly and eectively
reduce room resonances and feedback issues. Three position
level switch, -6dB (left), Bypass (middle) and -12dB (right). The
potentiometers should be used to nd and tune out any problem
frequencies.
Low • BoostsorcutsLowfrequenciesaround20Hzby+/-15dB
Low-Mid • BoostsorcutsLow-Midfrequenciesaround450Hzby+/-12dB
Hi-Mid • BoostsorcutsLow-Midfrequenciesaround2.5kHzby+/-12dB
Hi • BoostsorcutsHifrequenciesaround18kHzby+/-15dB

6
SAC2 · Features · Front panel
SAC2 · Features · Front panel
Front Panel
Output level bar graph indicators
The levels of each individual output are indicated with LED bar graphs.
Power On LED
Indicates whether the SAC2 is powered on.
Crossover frequency
The“X OVER“ switch allows users to select a crossover frequency
of either 70Hz or 120Hz. The correct frequency selection depends
on the individual characteristics of the speakers used.
LPF / Direct switch
The crossover‘s Low Pass Filter can be bypassed by switching to the DIRECT position allowing a full range signal to pass
through the low outputs.
Low output
Adjusts the LOW OUTPUT levels from -15dB to +10dB.
High Output
AdjuststheHIGHOUTPUTlevelsfrom-15dBto+10dB.
HPF / Direct switch
The crossover‘s High Pass Filter can be bypassed by switching to the DIRECT position allowing a full range signal to pass
through the high outputs.

7
SAC2 · Features · Rear panel
SAC2 · Features · Rear panel
Rear Panel
Input
Balanced Female XLR connectors for connecting Left
and Right audio signal.
Limiter time switch
The“LIM-T“ switch adjusts the limiter time between either
fast or slow, adjusting the attack and decay at the same time
Low Output
Balanced Male XLR connectors for sending Left and Right
low frequency audio signal.
Phase Switches
These switches reverse the polarity of the low frequency
output signal.
Sub Mode
This switch is used to switch the Low Output mode between Mono and Stereo. In Mono mode both low outputs are summed
together and both low outputs produce the same signal. Mono mode is active only if LPF / Direct switch is set to LPF.
Sub EQ
This switch turns on the low frequency enhancement circuitry which boosts frequencies around 60Hz to enhance the lowest
frequency band. This also works in full range mode (LPF o) to provide a bass enhancement
to a full range signal.
Hi Output
Balanced Male XLR connectors for sending Left and Right high frequency
audio signal.
Phase Switch
These switches reverse the polarity of the high frequency band output
signal.
Power Switch
Used to turn the SAC2 on or o.
Plug power connector
For connection to a standard IEC 3-pole AC connector.
Before connecting make sure that the mains voltage corresponds
to the SAC2‘s voltage requirements as stated on the unit.
434 mm
434 mm
434 mm
434 mm

8
L - Fill in R - Fill in
L-Hi
Out
R-Hi
Out
L-Full range
Out
R-Full range
Out
R-Full range
In
L-Full range
In
SAC2 · Using the System
SAC2 · Using the System
Stereo Master EQ
One of the advantages of the SAC2 is the ability to use the Notch Filters and four-band EQ as both a Master and Monitor/Fill EQ.
The Low Output can be used to send a full-range PA signal by switching it to DIRECT mode. The Hi Output can be used to
send a full-range signal by switching it to DIRECT mode or as a High Pass Filter with selectable 70Hz or 120Hz frequency to
send signal to Monitor/Fill loudspeakers. The built in VHD Line Drivers ensure the highest possible signal integrity over long
distances.

9
SAC2 · Using the System
SAC2 · Using the System
2-Way Stereo Crossover
The primary function of the SAC2 is as a 2-way stereo crossover.
The Low Output is used as a stereo low pass signal for subwoofers. The Low Output should be switched to LPF and the Left
and Right outputs sent to the subwoofers.
The Hi Output is used as a stereo high pass signal for mid/hi loudspeakers. The Hi Output should be switched to HPF and the
Left and Right outputs sent to the mid/hi loudspeakers.
The built in VHD Line Drivers ensure the highest possible signal integrity over long distances.

10
SAC2 · Using the System
SAC2 · Using the System
2-Way stereo crossover with mono subwoofer
The SAC2 can also be used as a stereo crossover with a mono subwoofer.
The Low Output is used as a mono low pass signal for a subwoofer. The Low Output should be switched to LPF and the Sub
Mode switched to MONO. Either Low Output can be sent to the Subwoofer as the Low Outputs now play the same signal.
The Hi Output is used as a stereo high pass signal for mid/hi loudspeakers.
The Hi Output should be switched to HPF and the Left and Right outputs sent to the mid/hi loudspeakers.
The built in VHD Line Drivers ensure the highest possible signal integrity over long distances.

11
SAC2 · Block Diagram
SAC2 · Block Diagram
Left channel
Right channel is identical

12
SAC2 · Input and Output Cables
SAC2 · 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
SAC2 Input Cables
SAC2 Output Cables

13
SAC2 · Specications
SAC2 · Specications
System Acoustic Perfomance
-1dB Response 20Hz to 40kHz
Dynamic Range >115dB
Channel Crosstalk >60dB
Total Harmonic Distortion <0.005%
Output Channels
Max. Output Voltage 14V / 7V (50Ω) RMS
Max. Output Current 450mA
Signal Input
Input Channels 2
Input Impedance 20kΩ (balanced)
Line input XLR
Signal Output
Output Channels 4 x Line Driver
Output Impedance 50Ω
Features
Level Control -15 / +10dB
System setup Crossover / Bypass
Gain -10 / +10dB
Phase 0° / 180°
Crossover 70 / 120Hz, Butterworth 12dB /octave
High Pass Filter 20 / 40Hz
Equalization 4-band equalizer
Notch Filter 2 per channel
Loudness bass enhancement +6dB @ 60Hz
Volume Limiter Fast/Slow / -15 + 10dB
Indicators 4x LED bar graphs
Power
Power Connector IEC 320
Operating Voltage 115V / 230V
Operating Voltage Range 90 to 130V@60Hz | 180 to 260V@50Hz
Physical Dimensions
Height 44 mm (1.73")
Width 482.6 mm (19.0")
Depth 200.5 mm (7.9")
Weight 3.2 kg (7.05lbs)
Specications

14
SAC2 · Warranty · Service
SAC2 · Warranty · Service
Warranty
Your SAC2 is covered against defects in material and workmanship.
Refer to your supplier for more details.
Service
In the unlikely event that your SAC2 develops a problem, it must be returned to an authorized distributor, service centre or
shipped directly to our factory. Because of the complexity of the design and the risk of electrical shock, all repairs must be
attempted only by qualied technical personnel.
If the unit needs to be shipped back to the factory, it must be sent in its original carton. If improperly packed, the unit may be
damaged.
To obtain service, contact your nearest KV2 Audio Service Centre, Distributor or Dealer.

KV2 Audio International
Nádražní 936, 399 01 Milevsko
Czech Republic
Tel.: [phone]
Email: [email protected]
www.kv2audio.com
KVV120062-00-05-0
The Future of Sound.
Made Perfectly Clear.