Vision AV-1700 User manual

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AV-1700 DIGITAL AMPLIFIER
OWNERS MANUAL
www.visionaudiovisual.com/techaudio/av-1700

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DECLARATION OF CONFORMITY
Where applicable Vision products are certified and comply with all known local regulations to a
„CB Certification‟ standard. Vision commits to ensure all products are fully compliant with all
applicable certification standards for sale in the EU and other participating countries.
The product described in this owner manual is in compliance with RoHS (EU directive
2002/95/EC), and WEEE (EU directive 2002/96/EC) standards. This product should be returned
to the place of purchase at the end of its useful life for recycling.
WARNINGS
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER (OR
BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the
user to the presence of uninsulated “dangerous voltage” within the product‟s enclosure that may be
of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle, is intended to alert the user to the presence of
important operating and maintenance (servicing) instructions in the literature accompanying the
appliance.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS APPLIANCE TO RAIN OR MOISTURE.
All products are designed and imported into the EU by „Vision‟ who is wholly owned by „Azlan
Logistics Ltd.‟, Registered in England Nr. 04625566 at Lion House, 4 Pioneer Business Park,
Clifton Moor, York, YO30 4GH. WEEE Registration: GD0046SY
DECLARATION OF ORIGIN
All Vision products are made in the People‟s Republic of China (PRC).

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USE ONLY DOMESTIC AC OUTLETS
Connecting the unit to an outlet supplying a higher voltage may create a fire hazard.
HANDLE THE POWER CORD WITH CARE
Do not disconnect the plug from the AC outlet by pulling the cord; always pull the plug itself.
Pulling the cord may damage it. If you do not intend to use your unit for any considerable
length of time, unplug the unit. Do not place furniture or other heavy objects on the cord, and
try to avoid dropping heavy objects on it. Do not tie a knot in the power cord. Not only could
the cord be damaged, but a short circuit could also be caused with a consequent fire hazard.
PLACE OF INSTALLATION
Avoid installing this product under the following conditions:
• Moist or humid places
• Places exposed to direct sunlight or close to heating equipment
• Extremely cold locations
• Places subject to excessive vibration or dust
• Poorly ventilated places
Do not expose this product to dripping or splashing. DO NOT PLACE OBJECTS FILLED WITH
LIQUIDS ON OR NEAR THIS PRODUCT!
MOVING THE UNIT
Before moving the unit, be sure to pull out the power cord from the AC outlet and disconnect
the interconnection cords with other units.
WARNING SIGNS
If you detect an abnormal smell or smoke, turn this product off immediately and unplug the
power cord. Contact your reseller or Vision.
PACKAGING
Save all packing material. It is essential for shipping in the event the unit ever needs repair.
IF ORIGINAL PACKAGING IS NOT USED TO RETURN THE UNIT TO THE SERVICE CENTRE,
DAMAGE IN TRANSIT WILL NOT BE COVERED BY WARRANTY.
WATTS
The most consistent standards for measuring watts are “Program Power” and “RMS” because
these measure average sustained levels.
Amplifier power output changes depending on how many loudspeakers are connected.
Professional manufacturers typically quote output based on 8 ohms. Less reputable
manufacturers quote at 4 ohms to make their product seem more powerful.
This amplifier has an output of:
2 x 30w (sometimes referred to as 60w) @ 8 ohms (two loudspeakers connected)
2 x 60w (sometimes referred to as 120w) @ 4 ohms (four loudspeakers connected)

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FRONT AND REAR PANELS
1. IR Receiver
2. Active Input LED
3. Line-level Input 4 (3.5mm Minijack - duplicated on rear panel)
4. Line-level Input Volume [Push: Input Select]
5. Microphone Input Gain [Push: On/Off]
1. Microphone Input (Balanced XLR)
2. Line-level Inputs 1-3 (2-Phono)
3. Line-level Input 4 (3.5mm Minijack -duplicated on front panel)
4. Line-Level Output (2-Phono)
5. Loudspeaker Outputs
6. RS-232 Control Input
7. Fuse
8. Figure-8 (C8) Power Input
1
3
4
5
2
1
2
3
4
6
8
7
5

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REMOTE CONTROL
1. Power On and Off
2. Input Selection
3. Tone Reset
4. Mute
5. Tone Control
6. Microphone Input Gain
7. Line-level Input Volume
1
2
3
4
5
6
7

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INSTALLATION
1. CONNECT INPUTS AND OUTPUTS Up to two pairs of loudspeakers can be connected. If
speaker cable provided is not long enough use unshielded speaker cable with gauge of
0.75mm or higher.
NOTE 1: The warranty will be void if you use shielded cable
NOTE 2: This is a low-impedance digital amplifier. Do not connect „100v line‟speakers
(normally any speakers with “t” in their part code)
2. CONNECT POWER The amplifier will turn on when power is plugged in the first time.
3. TURN POWER ON Then select input and adjust volume as required.
Should it become overloaded it will shut down to protect itself. Return operating conditions to
safe levels and restart amplifier.
MICROPHONE INPUT
1. The microphone input provides “Phantom Power” (24v) for condenser microphones such as
lectern or boundary (PZM) microphones.
NOTE: Ensure the microphone volume is turned down when connecting microphones.
2. The microphone volume can be adjusted independently of the line-level inputs.
3. Keep microphone away from loudspeakers to avoid feedback.

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RS-232 CODES
Table 1: Control Codes
HEX
Codes
On Remote
Function
A5 11 11
ON
Bring out of standby
A5 15 15
OFF
Put into standby
A5 05 05
MUTE
Mute on/off (Standby activates after 30 minutes of mute)
A5 01 01
INPUT1
Input select 1
A5 09 09
INPUT2
Input select 2
A5 10 10
INPUT3
Input select 3
A5 02 02
INPUT4
Input select 4
A5 08 08
TREBLE+
Increase treble gain by +1dB
A5 0D 0D
TREBLE-
Decrease treble gain by -1dB
A5 0C 0C
BASS+
Increase bass gain by +1dB
A5 12 12
BASS-
Decrease bass gain by -1Db
A5 00 00
RESET
Reset tone
A5 07 07
MIC+
Mic volume + (also cancels mute if active)
A5 0B 0B
MIC-
Mic volume - (also cancels mute if active)
A5 06 06
VOL+
Volume + (also cancels mute if active)
A5 04 04
VOL-
Volume - (also cancels mute if active)

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Table 2: Direct Master Volume Codes
HEX Codes
Function
Remark
A5 30 30
Set volume to 28
VOLUME MAX
A5 31 31
Set volume to 27
A5 32 32
Set volume to 26
A5 33 33
Set volume to 25
A5 34 34
Set volume to 24
A5 35 35
Set volume to 23
A5 36 36
Set volume to 22
A5 37 37
Set volume to 21
A5 38 38
Set volume to 20
A5 39 39
Set volume to 19
A5 3A 3A
Set volume to 18
A5 3B 3B
Set volume to 17
A5 3C 3C
Set volume to 16
A5 3D 3D
Set volume to 15
A5 3E 3E
Set volume to 14
A5 3F 3F
Set volume to 13
A5 40 40
Set volume to 12
A5 41 41
Set volume to 11
A5 42 42
Set volume to 10
A5 43 43
Set volume to 9
A5 44 44
Set volume to 8

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Table 3: Direct Master
Volume Codes
HEX Codes
Function
Remark
A5 50 50
Set volume To 0
VOLUME MIN
A5 51 51
Set volume to 1
A5 52 52
Set volume to 2
A5 53 53
Set volume To 3
A5 54 54
Set volume To 4
A5 55 55
Set volume To 5
A5 56 56
Set volume To 6
A5 57 57
Set volume To 7
A5 58 58
Set volume To 8
A5 59 59
Set volume To 9
A5 5A 5A
Set volume To 10
A5 5B 5B
Set volume To 11
A5 5C 5C
Set volume To 12
A5 45 45
Set volume to 7
A5 46 46
Set volume to 6
A5 47 47
Set volume to 5
A5 48 48
Set volume to 4
A5 49 49
Set volume to 3
A5 4A 4A
Set volume to 2
A5 4B 4B
Set volume to 1
A5 4C 4C
Set volume to 0
VOLUME MIN

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A5 5D 5D
Set volume To 13
A5 5E 5E
Set volume To 14
A5 5F 5F
Set volume To 15
A5 60 60
Set volume To 16
A5 61 61
Set volume To 17
A5 62 62
Set volume To 18
A5 63 63
Set volume To 19
A5 64 64
Set volume To 20
A5 65 65
Set volume To 21
A5 66 66
Set volume To 22
A5 67 67
Set volume To 23
A5 68 68
Set volume To 24
A5 69 69
Set volume To 25
A5 6A 6A
Set volume To 26
A5 6B 6B
Set volume To 27
A5 6C 6C
Set volume To 28
VOLUME MAX