Montarbo Active DI-BOX User Manual

June 5, 2024
Montarbo

Montarbo Active DI-BOX

Montarbo-Active DI-BOX-User -

Thank you for purchasing a Montarbo product, the Italian company founded in 1962, and since then serving music and audio. The unique and state of the art Montarbo products are designed with the utmost attention to detail and durability. Reliability is in line with the high quality standards and sensitivity to the environmental impact that distinguish the company.

Montarbo-Active DI-BOX-User -FIG 1 The MDI-2A active DI-BOX is mainly used on the stage, for optimal management of unbalanced signal from high-impedance instruments such as keyboards, guitar pick-ups and electric basses. A gain reduction PAD [0, -20, -30 dB] and a GROUND to eliminate any ground return hum can be applied to the two balanced output signals, thanks to the internal active circuits. The front connectors are compatible with both classic 6.3 mm TRS jacks and RCA connectors. It is also possible to take repetitions of the input signals through the convenient THRU connectors on the front panel.

PACKAGE CONTENTS

  • 1 x Active DI-BOX
  • 1 x User Manual – Section 1
  • 1 x User Manual – Section 2

WARNINGS
This manual warnings must be complied in conjunction with “User Manual – section 2”. Please read the manual before using.
Keep this manual handy for future reference.

FRONT CONTROL PANEL

Montarbo-Active DI-BOX-User -FIG 2

  1.  LEFT/RIGHT PAD
    3-position dimming selector [0 dB -20 dB -30 dB] applicable to LEFT and RIGHT channel.

  2. LEFT/RIGHT INPUT
    Unbalanced signal input on connector:
    TRS The relevant electrical connections are: Tip = + “warm” positive
    Sleeve = screen or mass
    RCA The relevant electrical connections are: Tip = + “warm” positive
    Sleeve = screen or mass.

  3. LEFT/RIGHT THRU
    Unbalanced signal output, repetition of LEFT input, on connector
    TRS The relevant electrical connections are: Tip = + “warm” positive
    Sleeve = screen or mass.

BACK

Montarbo-Active DI-BOX-User -FIG 3

  • 4 RIGHT
    Balanced signal output on XLR connector.

  • 5 GROUND
    Press this key (LIFT) to interrupt ground connection between input and output. Use this function to solve ground loops or hums.

  • 6 BATTERY
    Press this key to power the unit with a 9V DC battery. The adjacent LED is steady ON during battery operation.

  • 7 LEFT
    Balanced signal output on XLR connector

BOTTOM

  • 8. BATTERY COMPARTMENT
    Open the door and insert the 9V DC battery (not included).
    NOTE: disconnect the battery from the connection terminals in case of prolonged inactivity.

TECHNICAL SPECIFICATIONS

Type Active DI-BOX
Channels 2
Input connectors 6.3 mm jack, RCA
Maximum input level +1 3dBu/+4 dBu
Input impedance 180kΩ @PAD= 0 dB
Output connectors XLR
Frequency response 20 Hz-20 kHz
Total harmonic distortion <0.002%@1 kHz
Indicators Battery
Controls ground lift, Battery
Operating voltage 9V block
Dimensions (L x H x D) 172 mm x 42.5 mm x 112 mm
Weight 752 g

A.E.B. Industriale S.R.L.
Via Brodolini, 8 – Località Crespellano 40053 Valsamoggia – Bologna (ITALIA) Tel +39 051 969870 –

Fax +39 051 969725 www.montarbo.com

References

Read User Manual Online (PDF format)

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Download This Manual (PDF format)

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