KV2 Audio VHD Series 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
expectations.ctation.
VHD Preamp
Dual Output Preamp with built-in Line Drivers
VHD Preamp

Contents VHD Preamp
Contents
1
SAFETY INSTRUCTIONS 2
USING THE SYSTEM 4
DESCRIPTION 3
SPECIFICATIONS 7
CONTENTS 1

VHD Preamp
Instructions
Safety Instructions
2
How to use this manual
Observe all instructions and follow warnings marked on the equipment and in the user’s manual. Connect
the equipment only to a source of proper mains voltage. Do not attempt to switch on any equipment that
has been dropped, that is damaged, or has had liquid penetration, or if malfunctions have occurred and their
nature requires a repair action. The supply cable shall be made by a person having proper qualications.
WARNING
The equipment is designed in Class I and shall be connected to a wall socket having protective earthing. The
mains plug and supply cable shall remain easy accessible, as this is used for disconnection of the equipment
from the supply source if necessary. Never interrupt earthing due to safety reasons. Do not place the equip-
ment close to heating bodies or other sources of heat and protect it against direct sunlight. The equipment
must not come into contact with open ames. Ventilation of the equipment must not be obstructed by co-
vering of ventilation openings. The equipment must not be exposed to dripping or splashing liquid or water
and excessive humidity. Any object lled with any liquid shall not be placed on the equipment.
The triangle with a symbol of a lightning marks parts of the equipment under life
jeopardizing voltage, whose values may cause an injury from electric shock.
The symbol indicating that the equipment is manufactured in compliance with
EU standards.
The triangle with a symbol of an exclamation mark in the text marks important
instructions for operation, setting and maintenance.

Description VHD Preamp
Description
3
Basic Description
Front panel
Rear Panel
Block Diagram
The VHD Preamplier is a Very high denition, small stand-alone microphone and stereo inputs signal mixer.
Primarily built for high quality, easy presentation and comparisons of two individual systems using the same
source, the applications for this mixer are comprehensive and extremely useful. The VHD Preamp features a
stereo pair of balanced line inputs, stereo RCA phono connectors, and a very high quality VHD microphone
preamplier. The microphone channel features phantom power, four band equalization and a variable high
pass lter. The VHD Preamplier also features two switchable A or B outputs, to allow a simple comparison of
systems between the two outputs. Both A and B outputs have line drivers built into them to maintain au-
dio signal integrity over long cable lengths.
GAIN
0 +55 dB
+6 dB
48V
ON CLIP
-20dB
MICROPHONE
HIGH PASS BASS LOW MIDHIGH MIDTREBLE VOLUME
10 Hz 500 Hz
100 Hz
+6 dB +30 dB
LINE
-10dB
CLIP
GAIN BASS TREBLEVOLUME
BAL
UNBAL
INPUT
OUTPUT
SELECT
AB
-6 dB+6 dB
0 dB
-6 dB
0 dB
00
0
-20 dB
+6 dB00 0 dB
-20 dB
-15 dB +15 dB
0
-12 dB +12 dB
0
-12 dB +12 dB
0
-15 dB +15 dB
0
POWER
TECHNOLOGY
VERY HIGH
DEFINITION
PREAMP
WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE THIS PANEL OR ANY ATTACHED
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.
SERIAL NUMBER
AC IN
100 - 240 VAC, 50/60 Hz
MAX 30WATTS KV2 AUDIO, MANUFACTURED IN THE EUROPEAN UNION, WWW.KV2AUDIO.COM
RIGHT OUTPUT BA/B CONTROL LEFT RIGHT OUTPUT A LEFT RIGHT
RIGHT
LEFT
BAL. INPUTUNBAL. INPUT MIC. INPUTLEFT
LEFT
STANDBY
MUTE
LINE DRIVER
OUTPUT B
RIGHTLINE DRIVER
LEFT
STANDBY
MUTE
LINE DRIVER
OUTPUT A
RIGHT
MIC. INPUT PREAMPLIFIER EQUALIZATION
HIGH PASS FITER
HIGH PASS
GAIN
CLIP
CLIP
BASS
BASS
LOWMID
HIMID
TREBLE
TREBLELMID HMID
UNBALANCED INPUT
LINE DRIVER
48 V -20 dB
PREAMPLIFIER
-10 dB
LEFT
RIGHT
MIXER
OUTPUT SELECT
OUT. SEL.
DRIVER
A/B SELECT
INPUT
GAIN
BAL. INPUT
RIGHT
BAL. INPUT
LEFT
EQUALIZATION
BASS
BASS
TREBLE
VOLUME
TREBLELMID HMID
VOLUME

VHD Preamp
Using the system
Using the system
4
Demonstration / presentation mixer
System B
VHD Preamp Rear view
System A
Two sound systems comparing
System A
WARNING:TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE THIS PANEL OR ANY ATTACHED
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 APPLIANCETO RAIN OR MOISTURE.
SERIAL NUMBER
AC IN
100 - 240 VAC, 50/60 Hz
MAX 30WATTS KV2 AUDIO, MANUFACTURED IN THE EUROPEAN UNION, ��WWW.KV2AUDIO.COM
RIGHT OUTPUT BA/B CONTROLLEFT RIGHT OUTPUT A LEFT RIGHT
RIGHT
LEFT
BAL. INPUTUNBAL. INPUT MIC. INPUTLEFT
Balanced Input
Stereo player
Unbalanced Input
System B
Narrator's microphone

VHD Preamp
Using the system
5
Simple AV mixer-Projector sound and a microphone
Sound system
VHD Preamp Rear view
WARNING:TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE THIS PANEL OR ANY ATTACHED
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 APPLIANCETO RAIN OR MOISTURE.
SERIAL NUMBER
AC IN
100 - 240 VAC, 50/60 Hz
MAX 30WATTS KV2 AUDIO, MANUFACTURED IN THE EUROPEAN UNION, ��WWW.KV2AUDIO.COM
RIGHT OUTPUT BA/B CONTROLLEFT RIGHT OUTPUT A LEFT RIGHT
RIGHT
LEFT
BAL. INPUTUNBAL. INPUT MIC. INPUTLEFT
Stereo
player
Sound system
Input
Narrator's microphone
Using the system

VHD Preamp
Using the system
6
Using the system
Front Panel
Main system - PA (A) Main system - PA (A)
VHD Preamp Rear view
Replacement mixer for FOH when the main system is being taken down after a concert. Many venues now
insist that at least one pair of speakers and a mixer/mic is kept available during breakdown.
WARNING:TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE THIS PANEL OR ANY ATTACHED
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 APPLIANCETO RAIN OR MOISTURE.
SERIAL NUMBER
AC IN
100 - 240 VAC, 50/60 Hz
MAX 30WATTS KV2 AUDIO, MANUFACTURED IN THE EUROPEAN UNION, ��WWW.KV2AUDIO.COM
RIGHT OUTPUT BA/B CONTROLLEFT RIGHT OUTPUT A LEFT RIGHT
RIGHT
LEFT
BAL. INPUTUNBAL. INPUT MIC. INPUTLEFT
Main system
In
Replacement PA (B) Replacement PA (B)
Stereo
player
Replacement system
In
Narrator's microphone

Specications
Specications
7
System Acoustic Perfomance
-3dB Response 10Hz to 50kHz
Total Harmonic Distortion <0.0005%
Output Channels
Number of Channels 2
Max. Output Voltage 14V / 7V (50 ) RMS
Max. Output Current 450mA
Signal Input
Input Channels 5
Input Impedance
2k Mic / 20k Balanced IN / 10k RCA
Mic input Phantom power, -20dB, Input level
Line input RCA/Balanced, 2 band EQ, -10dB
Signal Output
Output channels stereo A / stereo B
Output Impedance 50
Features
High Pass Filter 10Hz to 500Hz
Equalization4 -band EQ
Power
Power Connector IEC 320
Operating Voltage Range 100 to 250V@50 to 60Hz
Physical Dimensions
Height 44.5mm (1.75")
Width 483mm (19.0")
Depth 177.8mm (7.0")
Weight 2.5kg (5.5lbs)
VHD Preamp

Notes:

Tel. [phone]
www.kv2audio.com
KVV120031-00-02-0
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.