600125 - Uncategorized MONOPRICE - Free user manual and instructions

Product Type	Passive Direct Box (DI Box)
Input Connector	1/4" unbalanced TS jack
Input Impedance	50 kilohms
Main Output Connector	Balanced XLR jack
Main Output Impedance	600 ohms
Parallel Output Connector	1/4" unbalanced TS jack
Parallel Output Impedance	50 kilohms
Attenuation	Switchable: 0dB, -20dB, -40dB
Ground Lift	Switchable
Construction Material	Steel
Dimensions (H x W x D)	4.7" x 3.0" x 1.8" (120 x 76 x 45 mm)
Weight (approx.)	0.8 lb (0.36 kg)
Power Supply	Passive, no power required
Main Function	Converts unbalanced high-impedance signal to balanced low-impedance signal
Additional Functions	Reduces high-level outputs up to 50W; isolates sound system; provides parallel output
Care and Maintenance	Wipe with dry cloth; keep away from moisture and extreme temperatures
Safety Precautions	Use with proper cables; avoid short circuits; turn off equipment before connecting
Repairability and Spare Parts	No user-serviceable parts inside; contact Monoprice for service
Included Accessories	None specified

Frequently Asked Questions - 600125 MONOPRICE

What is a DI box used for?

A DI (Direct Interface) box converts an unbalanced, high-impedance signal from instruments like guitars into a balanced, low-impedance signal suitable for professional audio systems. It also helps minimize noise and ground loops.

How do I connect the Monoprice 600125 DI box?

Connect a balanced XLR cable from the mixer to the XLR output of the DI box. Optionally, connect a 1/4" cable from the parallel output to your amp. Then plug your instrument into the 1/4" input. Ensure volumes are low before connecting.

When should I use the ground lift switch?

Use the ground lift switch when you hear a hum or buzz caused by a ground loop between your instrument and the sound system. Lifting the ground can isolate the instrument and eliminate the noise.

What does the attenuator switch do?

The attenuator switch reduces the input signal level by -20dB or -40dB. Use it if the input from your instrument is too hot and causes distortion at the mixer input.

Can I use the parallel output while using the XLR output?

Yes, the parallel output sends an identical copy of the input signal to a separate device, such as an amplifier on stage, while the XLR output sends a balanced signal to the mixer.

Is the Monoprice 600125 powered?

No, it is a passive DI box and does not require any external power. It uses a transformer to balance the signal.

What impedance does the input expect?

The input impedance is 50 kilohms, which is suitable for most high-impedance sources like electric guitars and keyboards.

Can I connect a speaker output to this DI box?

Yes, the DI box can handle high-level outputs up to 50 watts, but it is designed for line-level signals. For speaker-level signals, use the -20dB or -40dB attenuation to avoid distortion.

How do I clean the DI box?

Wipe the exterior with a dry or slightly damp cloth. Do not use any liquids or abrasives. Keep it away from moisture and extreme temperatures.

What cables are recommended for use?

Use a standard 1/4" TS instrument cable for the input and parallel output. For the main output, use a balanced XLR microphone cable.

USER MANUAL 600125 MONOPRICE

Sound Block Passive Direct Box with Ground Lift and Attenuator

P/N 600125

User's Manual

INTRODUCTION TO DI

• DI has many names, including Direct Input, Direct Injection, Direct Induction, and most commonly, Direct Interface.
• More than a simple 1/4" to XLR adapter, a DI box also matches level and impedance to minimize noise in professional live and studio sound systems.
• It converts an unbalanced signal into a balanced signal.
• It converts a High Impedance (Hi-Z) signal into a Low Impedance (Lo-Z) signal.
• It reduces high level outputs from Digital Pianos, Active Acoustic Guitars, and even Low Power Speaker Outputs (up to 50 watts).
• It isolates the sound system from the equipment on stage.
• It provides a parallel output, so performers can retain local control of their instruments.

graph TD
    A["INPUT 50K ohm"] --> B["PARAOUT 50K ohm"]
    B --> C["ATT -20dB"]
    C --> D["MATCHING TRANS ATT"]
    D --> E["Ground 600 ohm"]
    E --> F["BALANCED IN/OUT"]
    F --> G["ON ON OFF"]
    style A fill:#f9f,stroke:#333
    style B fill:#f9f,stroke:#333
    style C fill:#f9f,stroke:#333
    style D fill:#ccf,stroke:#333
    style E fill:#cfc,stroke:#333
    style F fill:#fcc,stroke:#333
    style G fill:#ffc,stroke:#333

OPERATION

1. Ensure that the volume levels of your instrument and sound system are set to the minimum.
2. Plug a balanced XLR connector into your mixing console or stage snake, then plug the other end into the XLR Output jack on the sound block.
3. (Optional) Plug one end of a 1/4" cable into the 1/4" input on your amp, then plug the other end into the 1/4" Parallel (Link) Output on the sound block.
4. Plug a 1/4" TS cable into the 1/4" Input on the sound block, then plug the other end into any unbalanced sound source (e.g., instrument).
5. Increase the volume level of your sound source (e.g., instrument) to the 50% \~ 75% range.
6. Increase the volume on your sound system to the desired level.
7. If there is a buzz in the system originating from your instrument, use the Ground Lift Switch to isolate your instrument from the sound system.
8. If there is distortion from the input of the sound system, use the Attenuator Switch to reduce the instrument's level by -20dB or -40dB.

SPECIFICATIONS

Instrument Input	1/4" unbalanced TS jack
Input Impedance	50 kilohms
Main Output	Balanced XLR jack
Main Output Impedance	600 ohms
Parallel (Link) Output	1/4" unbalanced TS jack
Parallel Output Impedance	50 kilohms
Input Attenuation	Switchable (0dB, -20dB, -40dB)
Ground Lift	Switchable
Construction	Steel
Dimensions	4.7" x 3.0" x 1.8" (120 x 76 x 45 mm)