MDA1 - Hi-fi system SAMSON - Free user manual and instructions

USER MANUAL MDA1 SAMSON

MDA1 Mono Active Direct Box

SAMSON MDA1 Mono Direct Active Box STRAW OUTLETTIVE OPEN TWO PARAMETER BATTERY ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFF ON/OFO

Quick Start Guide

SAMSON®

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Copyright 2016, Samson Technologies Corp.

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Samson Technologies Corp.

45 Gilpin Avenue

Hauppauge, New York 11788-8816

Phone: 1-800-3-SAMSON (1-800-372-6766)

Fax: [phone]

www.samsontech.com

Introduction

A direct insertion box, or DI box, converts unbalanced high impedance signals to balanced low impedance signals. This provides the facility to run long cables without deterioration of the signal, as well as connecting audio signals to a mixer's microphone input.

Samson's S-Max Direct Boxes combines premium sound circuitry with durable, roadworthy construction to provide high-quality signal connection solutions for live and studio applications. The Samson MDA1 Mono Active Direct Box offers a variety of DI solutions for live sound and recording applications. You can connect all kinds of audio signals like those from keyboards, drum machines, mixers, guitars, and outboard signal processors.

Unlike passive direct boxes, the MDA1 is active, which means it has a power supply, so you can rely on an even frequency response on any audio signal you connect to regardless of its output impedance. The MDA1 is ideal for connecting instruments with passive pickups, which have very high-impedances, by preserving the top end of the instrument's frequency response. The balanced output provides a clean signal, that is less susceptible to noise when compared to an unbalanced cable, which allows for running longer lengths of cables. Another benefit from a balanced connection is CMR (Common Mode Rejection), which provides cancellation of interference (hums and buzzes), while leaving the original signal pure.

With proper care and maintenance, your MDA1 will operate trouble-free for many years. Should your direct box ever require servicing, a Return Authorization (RA) number must be obtained before shipping your unit to Samson. Without this number, the unit will not be accepted. Please call Samson at 1-800-3SAMSON (1-800-372-6766) for an RA number prior to shipping your unit. If your direct box was purchased outside of the United States, contact your local distributor for warranty details and service information.

Callouts

12 INPUT THRU BATTERY POWER

Front Rear

5 BALANCED OUTPUT

1. POWER Indicator – This LED illuminates when the MDA1 is powered on. The MDA1 can receive power from either the intern 9 Volt battery or from a mixer's 48-volt phantom power.
2. INPUT - 1/4" hi-Z input jack for connecting for instruments, line level, or speaker level audio. If there is no cable connected to the INPUT jack, the MDA1 will power off. This prevents the battery from draining when the direct box is not in use.
3. THRU - 1/4" output for passing the input signal through to a stage amplifier or monitor system.
4. BATTERY On/Off Switch - Switches the 9 Volt battery on (when there is a cable connected to the INPUT jack).
5. BALANCED OUTPUT – Male XLR low-Z connector.

Callouts

6 OGB GROUND -5dB LIFT Side

8 Bottom

1. -15dB Pad switch – When engaged, the input level is attenuated by either -15dB to prevent distortion or when connecting a high level signal to the INPUT jack.
2. GROUND LIFT – When the switch is engaged, the input ground (shield) is disconnected.
3. Battery Door – Install a standard 9 Volt battery by opening the battery door and attaching the battery to the terminal connector.

Powering the MDA1

The MDA1 can operate on a single 9 Volt battery or standard 48 volt phantom power. Whenever phantom power is present on the XLR cable that is connected to the Balanced Output, the MDA1 plus will automatically switch to phantom power and disconnect the 9 Volt battery. In fact, when the Battery switch is in, the MDA1 will sense the voltage and select which is greater. The Phantom/Battery switch can be used to turn off the battery power when the unit is not in use.

Specifications

Type Mono Active Direct Box

Frequency Response 18Hz to 35kHz -3dB

Maximum Input +2dBu (9 Volt Battery)

Gain +4.8dB

Dynamic Range 105dB @ Balanced Output

Noise Floor -98dB (Pad Off)

Total harmonic distortion <0.05% from 18Hz to 35kHz

Input impedance 1MΩ (Pad On or Off)

Output Impedance 200Ω

Input PAD Switch 0dB, -15dB

Ground Lift Disconnects XLR pin-1 (Output)

Connectors 1/4" Phone Jack, unbalanced (In & Thru)

XLR balanced (Output)

Power Supply 48V Phantom Power or 9 Volt battery

Construction 14 gauge steel chassis

Dimensions 5" x 3.38" x 1.95"

127mm x 86mm x 50mm

Weight 1.34lb

611g

ENFRÉESIT

Diagram of a device panel with labeled components (no text or symbols present)

Bas

Diagram of a battery inside a rectangular frame with mounting holes (no text or symbols)

Unterseite

Diagram of a battery inside a rectangular frame with mounting holes (no text or symbols)

Parte inferior

Diagram of a battery inside a rectangular frame with mounting holes (no text or symbols)

Pannello inferiore