DA-26
Mono / Stereo Analogue Audio Distribution Amplifier
User’s Manual
ED 02/06
V 1.1, 27/02/2006
DA-26
Mono / Stereo Analogue Audio Distribution Amplifier
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2
CONTENTS
1. Equipment description.................................................................................................. 3
1.1. Basic design concepts............................................................................................. 3
1.2. Gain.......................................................................................................................... 3
1.3. Adjustments............................................................................................................. 3
2. Equipment power supply.............................................................................................. 3
3. Description of front and back panel............................................................................ 4
3.1. Description of front panel......................................................................................... 4
3.2. Description of back panel......................................................................................... 4
4. Signal connections........................................................................................................ 5
5. Technical specifications............................................................................................... 6
6. A.E.Q. Guarantee........................................................................................................... 7
DA-26
Mono / Stereo Analogue Audio Distribution Amplifier
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1. Equipment description
.
1.1. Basic design concepts.
The DA-26 is an analogue audio distribution amplifier with 2 input audio channels and 12 output
audio channels. Both inputs and outputs are transformer balanced.
You can configure the DA-26 to work in Mono or Stereo mode. In Mono mode 1 input and 12
outputs are available. In Stereo mode 2 inputs and 6 outputs per input are available.
You can change the working mode just by pushing a button located on the front panel.
1.2. Gain.
Independent gain control (between -∞ and +15 dB) is provided for each individual output.
1.3. Adjustments.
All the outputs are adjusted by default with a gain of 0 dB. Due to the load impedance of the
equipment that are receiving the distributed signal or due to different level requirements, in
some installations it may be necessary to make a little gain adjustment in order to get the
desired output level. You can use an oscillator as input generator and use a trimmer to regulate
the front potentiometers in order to adjust each output level.
2. Equipment power supply
.
The equipment receives power through the connector designed for that purpose (located on the
back panel), using the cable supplied. The equipment may be operated with alternating voltage
of between 90V and 250V at 50 or 60 Hz. Maximum consumption is approximately 45W.
To turn on the equipment, you must activate the power switch (ON position) located on the front
panel. If all instructions have been correctly followed, the Power ON LED will light up, indicating
that the equipment is receiving power.
DA-26
Mono / Stereo Analogue Audio Distribution Amplifier
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3. Description of front and back panel
.
3.1. Description of front panel.
LEFTRIGHT
1. Power switch.
2. “Power ON” LED.
3. “Mono / Stereo” selection switch.
4. Output level adjustment potentiometers.
RIGHT LEFT
Output level 1 (1R). Output level 7 (1L).
Output level 2 (2R). Output level 8 (2L).
Output level 3 (3R). Output level 9 (3L).
Output level 4 (4R). Output level 10 (4L).
Output level 5 (5R). Output level 11 (5L).
Output level 6 (6R). Output level 12 (6L).
3.2. Description of back panel.
1. Power cable connector and fuse holder.
2. Input connectors.
3. Output connectors.
When you’re working in Mono mode, the input connector is the one marked as 2(R).
4(R) 3 4(L) 2
1
1 3
(
L
)
2
(
L
)
2
(
R
)
3
(
R
)
DA-26
Mono / Stereo Analogue Audio Distribution Amplifier
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4. Signal connections
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To make the audio connections, it’s recommended to extract previously the male connectors.
We recommend you to mark the first terminal position (IN+) in order to avoid a wrong cabling.
You can extract the connector by pulling. When you connect it again there’s only one possible
position, but take care that it’s not displaced one or more pins because it wouldn’t work or would
produce noise.
Connections must be made with a foil shielded twisted pair cable. Turn the screws to fasten the
cables to the security clamps. We recommend tinning all wire ends.
HARTMANN
Connector
1
2
3
INPUT LEFT V+ GND V-
INPUT RIGHT V+ GND V-
HARTMANN
Connector
1
2
3
OUTPUT 1 V+ GND V-
OUTPUT 2 V+ GND V-
OUTPUT 3 V+ GND V-
OUTPUT 4 V+ GND V-
OUTPUT 5 V+ GND V-
OUTPUT 6 V+ GND V-
OUTPUT 7 V+ GND V-
OUTPUT 8 V+ GND V-
OUTPUT 9 V+ GND V-
OUTPUT 10 V+ GND V-
OUTPUT 11 V+ GND V-
OUTPUT 12 V+ GND V-
DA-26
Mono / Stereo Analogue Audio Distribution Amplifier
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5. Technical specifications
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Inputs: 2 transformer balanced inputs
Max. input level: +22 dBu
Input impedance: 6K8 Ω
Outputs: 12 independent transformer balanced outputs
Adjustable gain: from - ∞ to +15 dB for each output
Absolute output noise: < - 89 dBu
Bandwidth: from 20 Hz to 20 KHz: ± 0,5 dB
Output impedance: < 60 Ω
Distortion: < 0.1% from 40 Hz to 20 KHz with 0 dBu input
Power supply: 90-250V 50/60Hz
Power consumption: 7,7 W.
Dimensions: Height: 1 U (44 mm.)
Depth: 121 mm.
Weight: 2,8 Kg.
DA-26
Mono / Stereo Analogue Audio Distribution Amplifier
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6. A.E.Q. Guarantee
.
AEQ guarantees that this product has been designed and manufactured under a certified Quality
Assurance System and according to the ISO 9001/2002 Standard. AEQ therefore Guarantees that
the necessary test protocols to assure the proper operation and the specified technical
characteristics of the product have been followed and accomplished. This includes that the general
protocols for design and production and the particular ones for this product are conveniently
documented.
1. - The present guarantee does not exclude or limit in any way any legally recognized right of the
client.
2. - The period of guarantee is defined to be twelve natural months starting from the date of
purchase of the product by the first client. To be able to apply to the established in this guarantee, it
is compulsory condition to inform the authorized distributor or –to its effect- an AEQ Sales office or
the Technical Service of AEQ within thirty days of the appearance of the defect and within the period
of guarantee, as well as to facilitate a copy of the purchase invoice and serial number of the product.
It will be equally necessary the previous and expressed conformity from the AEQ Technical Service
for the shipment to AEQ of products for their repair or substitution in application of the present
guarantee. In consequence, return of equipment that does not comply with these conditions will not
be accepted.
3. -AEQ will at its own cost repair the faulty product once returned, including the necessary labour to
carry out such repair, whenever the failure is caused by defects of the materials, design or
workmanship. The repair will be carried out in any of the AEQ authorized Technical Service Center.
This guarantee does not include the freight charges of the product to or from such Authorized
Technical Service Center.
4. – No Extension of the Guarantee Period for repaired product shall be applied. Nor shall a
Substituted Products in application of this Guarantee be subject to Guarantee Period Extension.
5. - The present guarantee will not be applicable in the following situations:
Improper use or Contrary use of the product as per the User or Instruction Manual; violent
manipulation; exhibition to humidity or extreme thermal or environmental conditions or sudden
changes of such conditions; electrical discharges or lightning; oxidation; modifications or not
authorized connections; repairs or non-authorized disassembly of the product; spill of liquids or
chemical products.
6. - Under no circumstances, whether based upon this Limited Guarantee or otherwise, shall AEQ,
S.A. be liable for incidental, special, or consequential damages derived from the use or from the
impossibility of using the product.
AEQ shall not be liable for loss of information in the disks or data support that have been altered or
found to be inexact, neither for any accidental damage caused by the user or other persons
manipulating the product.
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