Cobra Acoustic ACA-004 User manual

Cobra ACA-004 8 Channel Line Mixer
© Cobra International Tradin Ltd
®
The Cobra ine or microphone mixer has been designed to be re iab e, cost effective and bui t for continuous, troub e-free
operation under rigorous use. Cobra Acoustics unique degree of commitment to research, qua ity-contro and testing
resu ts in continuous improvement of the product. If you need specia assistance beyond the scope of this manua , p ease
contact our technica support department.
Warnin
To prevent damage to the product or e ectric shock do not expose this device or its power supp y to rain or moisture.
Before Use
• Before you start using this unit, p ease check if there’s no transportation damage. Shou d there be any, do not use the
device and consu t your dea er first.
• Important: This device eft our factory in perfect condition and we packaged. It is abso ute y necessary for the user to
strict y fo ow the safety instructions and warnings in this user manua . Any damage caused by mishand ing is not subject
to warranty. The dea er wi not accept responsibi ity for any resu ting defects or prob ems caused by disregarding this
user manua .
• Keep this book et in a safe p ace for future consu tation. If you se the amp ifier, be sure to add this user manua .
• To protect the environment, p ease try to recyc e the packing materia as much as possib e.
Safety Instructions:
Caution: To reduce the risk of e ectric shock, do not remove the top cover. No user-serviceab e parts inside. Refer
servicing to qua ified service personne on y.
Caution: Remember excessive oud noise can serious y damage ong-term hearing, a ways keep vo umes as ow as possib e.
• To avoid condensation forming inside, a ow the unit to adapt to the surrounding temperatures when bringing it
into a warm room after transport.
• This unit is for indoor use on y.
• Don’t p ace meta objects or spi iquid inside the unit. If a foreign object enters the unit, immediate y disconnect the
mains power.
• No naked f ame sources, such as ighted cand es, shou d be p aced on the app iance.
• Keep the unit away from chi dren.
• Inexperienced persons shou d not operate this device.
• Maximum safe ambient operating temperature is 40 degrees. Don’t use this unit at higher ambient temperatures.
• A ways unp ug the unit when it is not used for a ong time or before you start servicing.
• The power supp y shou d a ways be in perfect condition. Switch the unit immediate y off when the power supp y cab e is
squashed or damaged, or there is any damage to the power supp y casing.
• In order to prevent e ectric shock, do not open the cover, there are no user serviceab e parts inside.
• In the event of serious operating prob ems, stop using the app iance and contact your dea er immediate y.
• Due to safety reasons it is prohibited to make unauthorized modifications to the unit.
• A ways use the power supp y that is supp ied with the product. If the power supp y needs to be rep aced a ways use one
with the correct power, vo tage and connector.
Description
This is a professiona and versati e mixer suitab e for ine or microphones eve s. The mixer can be used as an 8 mono input
and 1 mono output mixer, two separate 4 channe mono-in-out mixers with independent outputs, or a 4 channe stereo
input mixer with one stereo output. Channe A and B have switches for ine eve or microphone eve . A connections are
via ¼” mono jack p ugs. Each input and output channe has independent vo ume contro s.

Important Precautions & Instructions
2
Features
• Eight mono ¼” Jack Inputs.
• Two Mono ¼” Jack Output.
• Individua Leve Contro s.
• Very Compact Design.
• U tra ow Noise Components.
• Powered Via 12 Vo t Power Supp y (supp ied or a PP3 Battery (not supp ied)
• Microphone and ine eve switches
• Mono and stereo mode se ect switch
Specification
Line Input Connectors: 1/4'' TS
Input Impedance: 4.7k Ohms
Maximum Input Leve : +16dBu
Output Connector: 1/4'' TS
Output Impedance: Approx. 80 Ohms
Maximum Output Leve : +16dBu
Power Supp y: 12v DC 500mA
Dimensions: 150mm x 120 x 67mm
Weight: 574kg
Functions
1. For connection for 12-vo t power supp y.
2. On off power switch.
3. Output Connections A and B, ¼” jack mono. For connection to a mixer or amp ifier.
4. Input Connections 1-8, ¼” jack mono. From ine eve or microphone sources.
5. Four Leve Contro s for Channe A.
6. Four Leve Contro s for Channe B.
7. Microphone and ine eve switches. Use this to make Channe A or B suitab e for either ine eve inputs or microphone
eve inputs
8. Output vo ume contro s A and B.
9. Power and Peak ights. Light up when the mixer is receiving power. They wi f ash more intense y more the signa is being
over driven.
10. Mono/Stereo switch. This converts the mixer to either 8 mono input and 1 mono output mode or 4 stereo input and 1
stereo output mode/2x 4 mono input 1 mono output mode.
11. Open the p astic compartment on the bottom for battery connection.
❸❹
❶
❷
❺
❻
❼
❼
⓫❾
❿
❽

Important Precautions & Instructions
3
Connect To Channe A Connect to Channe B
Keyboard
Mixer
or Amplifier
Keyboard
Option 1: 8 In - 1 Out
Option 2: 2 x 4 In - 2 Out
Switch set to “Line”
Switch set to “Mic”
CH B Control Not Active
CH A Control Active
Switch set to “Mono”
Connect To Channe A Connect to Channe B
Mono Line
Source
Mono Line
Source
Mono Line
Source
Mono Line
Source Amplifier 1
Amplifier 2
Switch set to “Line”
Switch set to “Line”
Volume Output B
Volume Output A
Switch set to “Stereo”
Channe A output
Channe B output

Important Precautions & Instructions
4
Option 3: 4 Stereo In - 1 Stereo Out
Use Input A for Left & Input B for Right
CD Player Computer Radio CD Player
Stereo
Amplifier
Switch set to “Line”
Switch set to “Line”
Right Volume
Left Volume
Switch set to “Stereo”
Channe A Left
Channe B Right