KV2 Audio SAC2 User manual

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 expectation.
SAC2
User Guide
+10 dB-15 dB
0
GAIN LIMITER
+15 dB
-15 dB
0
LOW
+12 dB-12 dB
0
+12 dB-12 dB
0
+15 dB-15 dB
0
LOW - MID HI - MID HI
-6 dB -12 dB0 -6 dB -12 dB0 -6 dB -12 dB0 -6 dB -12 dB0
LOW-RLOW-L HI - L HI - R
0dB
+3dB
-3dB -8dB
-13dB
X OVER
70HzON
120Hz
LPF
+10 dB-15 dB
0
+10 dB-15 dB
0
HI OUTPUTLOW OUTPUT
HPF
DIRECT
NOTCH LEFT NOTCH RIGHT
HI PASS
40Hz
+10 dB-15 dB
0
ACTIVE
20Hz
EQ
ON
OFF
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450

Contents
Introduction
How to use this manual 4
Icons used include 4
Important safety instructions 4
Introducing the SAC2 5
Dimensions 5
Getting Started
Unpacking 6
Rack mounting 6
AC Power requirements 6
Voltage requirements 6
Connector wiring 6
Features
Front Panel 7
Rear Panel 9
Using the system
Stereo Master EQ 10
2-Way Stereo Crossover 11
2-Way Stereo Crossover
with mono Subwoofer 12
Block Diagram 13
SAC2 Specification 14
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 authorised
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 attem-
pted only by qualified 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 of Dealer.
Page | 3

NOTE
!
CAUTION
C
!
14. Unplug SAC2 during lightning storms
or when unused for long periods of time.
15. Refer all servicing to qualified 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.
How to use this manual
As you read this manual, you’ll find figures
and diagrams to help you understand and
visualise what you’re reading. You’ll also find
numerous icons that serve as cues to flag
important information or warn you against
improper or potentially harmful activities.
Icons used include
Introduction
“NOTE” identifies an
important or useful piece
of information relating to
the topic under discussion.
“CAUTION” gives notice
that an action can have
serious consequences and
could cause harm to
equipment or personel,
delays, or other problems.
Important safety instructions
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 fit 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 a ccessories specified by
KV2 Audio.
13. The unit is intended for use in a 19” rack.
Follow the mounting instructions.
CAUTION:
Installation should only be done
by experienced professionals.
!
CAUTION
Page | 4

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Unpacking
Unpack the SAC2 and check to see if there is
any damage to it. If you find any damage
notify your supplier immediately. Only the
consignee may institute a claim with the
carrier for any damage incurred during ship-
ping. Be sure to save the carton and all packa-
ging 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:
s3!#3UPER!NALOGUE#ONTROLLER
s5SER'UIDE
s)%#0OWER#ABLE
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 recom-
mend 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 fixed installation,
KV2 Audio provide an additional security
panel.
AC Power requirements
The SAC2 USESASTANDARD)%#POLE!#
connector.
4HE3!#OPERATESINEITHER6OR6
mode. This setup is preconfigured at the
factory.
Getting started
AUTION
!
Voltage requirements
The SAC2 operates safely and without audio
discontinuity if the AC voltage stays within the
OPERATINGWINDOWOF66IN6
MODEOR66WHENWORKINGIN6
MODEATOR(Z
Input Output
12
3
21
3
1 = Ground
2 = Hot (+)
3 = Cold (-)
Connector wiring
XLR Balanced Input and Output connectors
CAUTION:
)FTHE/N,%$DOESNOTILLUMINATE
or the system does not respond to
audio input remove AC power
immediately. Verify that the
voltage is within the proper
range. If the problem persists,
please contact KV2 Audio or an
AUTHORIZEDSERVICECENTER
!
CAUTION
CAUTION:
If it is necessary to convert balan-
ced output to unbalanced, it is
IMPOSSIBLETOSHORT(OTOR
#OLDPINSWITH'ROUND)N
THISEVENTTHE,INE$RIVERSWILL
cause permanent disconnection.
!
CAUTION
0Age | 

+10 dB-15 dB
0
GAIN LIMITER
+15 dB
-15 dB
0
LOW
+12 dB-12 dB
0
+12 dB-12 dB
0
+15 dB-15 dB
0
LOW - MID HI - MID HI
-6 dB -12 dB0 -6 dB -12 dB0 -6 dB -12 dB0 -6 dB -12 dB0
LOW-RLOW-L HI - L HI - R
0dB
+3dB
-3dB
-8dB
-13dB
X OVER
70HzON
120Hz
LPF
+10 dB-15 dB
0
+10 dB-15 dB
0
HI OUTPUTLOW OUTPUT
HPF
DIRECT
NOTCH LEFT NOTCH RIGHT
HI PASS
40Hz
+10 dB-15 dB
0
ACTIVE
20Hz
EQ
ON
OFF
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
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.
+10 dB-15 dB
0
GAIN LIMITER
HI PASS
40Hz
+10 dB-15 dB
0
ACTIVE
20Hz
+15 dB
-15 dB
0
LOW
+12 dB-12 dB
0
+12 dB-12 dB
0
+15 dB-15 dB
0
LOW - MID HI - MID HI
EQ
ON
OFF
-6 dB -12 dB0 -6 dB -12 dB0 -6 dB -12 dB0 -6 dB -12 dB0
NOTCH LEFT NOTCH RIGHT
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
Four-Band Equalizer
The four-band EQ section is a unique Super Analog
equalization circuit specially designed to highlight
the desired band without adversely affecting the
overall sound.
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
Notch Filters
Use independent left and right notch filters to quickly and
effectively reduce room resonances and feedback issues.
Three position level switch, -6dB (left), Bypass (middle) and
-12dB (right).
The potentiometers should be used to find and tune out any
problem frequencies.
High Pass Filter
This switch selects between either a 20Hz or 40Hz high pass filter. It has a slope of 12dB/octave
and it is used to protect your subwoofer system from the frequencies that it cannot reproduce
efficiently and may cause damage.
Features
Front Panel
Page | 7

LOW-RLOW-L HI - L HI - R
0dB
+3dB
-3dB
-8dB
-13dB
+10 dB-15 dB
0
GAIN LIMITER
+15 dB
-15 dB
0
LOW
+12 dB-12 dB
0
+12 dB-12 dB
0
+15 dB-15 dB
0
LOW - MID HI - MID HI
-6 dB -12 dB0 -6 dB -12 dB0 -6 dB -12 dB0 -6 dB -12 dB0
LOW-RLOW-L HI - L HI - R
0dB
+3dB
-3dB
-8dB
-13dB
X OVER
70HzON
120Hz
LPF
+10 dB-15 dB
0
+10 dB-15 dB
0
HI OUTPUTLOW OUTPUT
HPF
DIRECT
NOTCH LEFT NOTCH RIGHT
HI PASS
40Hz
+10 dB-15 dB
0
ACTIVE
20Hz
EQ
ON
OFF
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
45
52
80
140
300
500
800
1.3k
1.6kHz
300
200 450
Output level bar graph indicators
The levels of each individual output are indicated with LED bar
graphs.
DIRECT
X OVER
70HzON
120Hz
LPF
+10 dB-15 dB
0
+10 dB-15 dB
0
HI OUTPUTLOW OUTPUT
HPF
DIRECT
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 frequen-
cy 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.
Features
Front Panel
DIRECT
Page | 8

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.
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 off) to provide
a bass enhancement to a full range signal.
POWER
WWW.KV2AUDIO.COM
KV2 AUDIO, MANUFACTURED IN THE EUROPEAN UNION
230 VAC, 50/60 Hz
MAX 30WATTS
RL
PHASE PHASE PHASE PHASE SUB EQ
ON
OFF
SUB MODE
MONO
L / R
LIM - T
FAST
SLOW
HI
OUTPUT
LR LOW
OUTPUT
L / MONO R / MONO INPUT
180˚
0˚
180˚
0˚
180˚
0˚
180˚
0˚
SERIAL NUMBER
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE
THIS PANEL OR ANYATTACHED COMPONENTS.NO OPERATOR SERVICEABLE
PARTS INSIDE.REFER SERVICING TO QUALIFIED PERSONNEL ONLY.TO
REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.
RL
LIM - T
FAST
SLOW
INPUT
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.
PHASE PHASE
HI
OUTPUT
LR
180˚
0˚
180˚
0˚
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
230 VAC, 50/60 Hz
MAX 30WATTS
Power Switch
Used to turn the SAC2 on or off.
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.
PHASE PHASE SUB EQ
ON
OFF
SUB MODE
MONO
L / R
LOW
OUTPUT
L / MONO R / MONO
180˚
0˚
180˚
0˚
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.
Features
Rear Panel
Page | 9

POWER
WWW.KV2AUDIO.COM
KV2 AUDIO, MANUFACTURED IN THE EUROPEAN UNION
230 VAC, 50/60 Hz
MAX 30WATTS
RL
PHASE PHASE PHASE PHASE SUB EQ
ON
OFF
SUB MODE
MONO
L / R
LIM - T
FAST
SLOW
HI
OUTPUT
LR LOW
OUTPUT
L / MONO R / MONO INPUT
180˚
0˚
180˚
0˚
180˚
0˚
180˚
0˚
SERIAL NUMBER
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE
THIS PANEL OR ANYATTACHED COMPONENTS.NO OPERATOR SERVICEABLE
PARTS INSIDE.REFER SERVICING TO QUALIFIED PERSONNEL ONLY.TO
REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.
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.
L - Full Range PA R - Full Range PA
L-Full range
Out
R-Full range
Out
L - Fill in R - Fill in
Using the System
L-Full Range
In
R-Full Range
In
SAC2 Rear view
X OVER
70HzON
120Hz
LPF
+10 dB-15 dB
0
+10 dB-15 dB
0
HI OUTPUTLOW OUTPUT
HPF
DIRECT
DIRECT
SAC2 Front view
SUB MODE
MONO
L / R
HPF
DIRECT
LPF
DIRECT
R-Hi
Out
L-Hi
Out
Page | 10

L - Bass module
POWER
WWW.KV2AUDIO.COM
KV2 AUDIO, MANUFACTURED IN THE EUROPEAN UNION
230 VAC, 50/60 Hz
MAX 30WATTS
RL
PHASE PHASE PHASE PHASE SUB EQ
ON
OFF
SUB MODE
MONO
L / R
LIM - T
FAST
SLOW
HI
OUTPUT
LR LOW
OUTPUT
L / MONO R / MONO INPUT
180˚
0˚
180˚
0˚
180˚
0˚
180˚
0˚
SERIAL NUMBER
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE
THIS PANEL OR ANYATTACHED COMPONENTS.NO OPERATOR SERVICEABLE
PARTS INSIDE.REFER SERVICING TO QUALIFIED PERSONNEL ONLY.TO
REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.
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.
Using the System
L - Hi/Mid module
R - Bass module
R - Hi/Mid module
R-Low Out
R-Hi Out
L-Low Out
L-Hi Out
R-Low
Out
R-Hi
Out
L-Low
Out
L-Hi
Out
L-Full Range
In
R-Full Range
In
SUB MODE
MONO
L / R
SAC2 Rear view
Power
amplifier
Page | 11

POWER
WWW.KV2AUDIO.COM
KV2 AUDIO, MANUFACTURED IN THE EUROPEAN UNION
230 VAC, 50/60 Hz
MAX 30WATTS
RL
PHASE PHASE PHASE PHASE SUB EQ
ON
OFF
SUB MODE
MONO
L / R
LIM - T
FAST
SLOW
HI
OUTPUT
LR LOW
OUTPUT
L / MONO R / MONO INPUT
180˚
0˚
180˚
0˚
180˚
0˚
180˚
0˚
SERIAL NUMBER
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE
THIS PANEL OR ANYATTACHED COMPONENTS.NO OPERATOR SERVICEABLE
PARTS INSIDE.REFER SERVICING TO QUALIFIED PERSONNEL ONLY.TO
REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.
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 Sub-
woofer 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.
L - Hi/Mid module
Bass module
R - Hi/Mid module
Low, Summed Out
R-Hi Out
L-Full Range
In
R-Full Range
In
L-Hi Out
Low
Summed Out
R-Hi
Out
L-Hi
Out
Bass module
Using the System
SUB MODE
MONO
L / R
SAC2 Rear view
Power
amplifier
Page | 12

LOW OUTPUT
STANDBY MUTE
PHASESUB EQ LOW OUT
METER
LINE DRIVER
HI OUTPUT
HIGH OUTPUT
0 dB
-13 dB
-8 dB -3 dB
+3 dB
0°
180°
OFF
ON
PHASE
INPUT LIMITER
-6 dB
OFF
-12 dB
HIGH
PASS
EQ
EQUALIZATION
LOW PASS FITER
X OVER
HIGH PASS FITER
120 Hz 70 Hz
LPF
DIRECT DIRECT
HPF
120 Hz 70 Hz
HIGH PASS FITER
LIM-T
LIMITER
LOW OUTPUT
GAIN
ACTIVE NOTCH FILTERS
FREQ 1
FREQ 2
0 dB
-13 dB
-8 dB -3 dB
+3 dB
LOW
LOW
LOW-MID
HI-MID
HI
HIGHLMID HMID
OFF ON
0°
180°
40 Hz 20 Hz
FAST SLOW
HI OUT METER
LINE DRIVER
L/R MONO
CHANNEL-R - LF OUT CHANNEL- L - LF OUT
Block diagram
Left channel
Right channel is identical
Page | 13

SAC2 Specification
Connection
Inputs
Inputs type
Input Impedance
Max. Input level
Outputs
Outputs type
Output Impedance
Max. Output level
Mains connector
Power Voltage
Features
High Pass Filter
Crossover
Limiter
Frequency balance
Low ±15dB
Low-Mid ±12dB
High-Mid ±12dB
High ±15dB
Notch Filters
Levels 0 / -6 / -12 dB
Outputs level indicators
Output levels
Electrical Characteristics
Frequency Response
Total Harmonic Distortion 20Hz - 20kHz
Signal to Noise Ratio
Channel Crosstalk
Physical Dimensions
Height 44.5mm (1,75”) 1RU
Width 483mm (19”)
Depth 201mm (7.9“)
Weight 3.2kg (7.05lbs)
Equalizer bypass
+22dBu
Standard IEC
180÷260VAC, 50Hz / 90÷130 VAC, 60Hz
4 - each with independent VHD line Driver
Male XLR
50Ω
2
20kΩ (balanced)
Female XLR
+22dBu
>60dB
>115dB
<0.005%
20Hz ÷ 40kHz
4-band equalizer
Low level outputs adjustable from -15 to +10dB
High level outputs adjustable from -15 to +10dB
Range from 40 Hz to 1.6 kHz
2 per channel
4 x LED bar graphs
20 or 40Hz
70 or 120Hz
Butterworth 12 dB/octave
LPF and HPF lter bypass
Adjustable Level -15 +10dB
Adjustable Time (Fast/Slow)
Page | 14

The future of sound.
Made perfectly clear.
KV2 Audio, Nádražní 936, 399 01 Milevsko, Czech Republic
T [phone] F [phone]
www.kv2audio.com KVV120062-00-03-0
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 expectation.