Art DJ PRE II Bedienungsanleitung

Phono Preamplifier

Artcessories

User's Manual

IMPORTANT SAFETY INSTRUCTION – READ FIRST

This symbol, whenever it appears,

alerts you to the presence of

uninsulated dangerous voltage

inside enclosure-voltage that may be

sufficient to constitute risk of shock.

This symbol, whenever it appears,

alerts you to important operating

and maintenance instructions in

the accompanying literature.

Please read the manual.

Read Instructions: Retain safety and operating instructions for

future reference. Heed all warnings printed here and on the

equipment. Follow the operating instructions printed in this user

guide.

Do not open: There are no user serviceable parts inside. Refer

any service work to qualified technical personnel only.

Grounding: Only connect the unit to equipment with properly

grounded mains power. Do not defeat the grounding and

polarization means of the power cord plug of the connected

equipment. Do not remove or tamper with the ground

connection on the power cord of the connected equipment.

Environment: Protect from excessive dirt, dust, heat, and

vibration when operating and storing. Avoid tobacco ash, drink

spillage and smoke, especially that associated with smoke

machines.

Handling: Protect the controls from damage during transit. Use

adequate padding if you need to ship the unit. To avoid injury to

yourself or damage to the equipment, take care when lifting,

moving or carrying the unit.

Servicing: Refer servicing to qualified technical personnel.

Installation: Install the unit in accordance with the instructions

printed in the user guide.

INTRODUCTION:

Thanks for purchasing Applied Research and

Technology’s DJPRE II™, a high quality Phono preamp

designed for your home and studio. It acts as an

interface between your turntable and your audio

recording system. The analog input capacitance can be

switched between 100pf and 200pf to optimize your

phono cartridge response. A switchable low cut filter

removes turntable rumble while leaving the audio

pristine. The front gain trim control and signal/clip LED

allow you to optimize the preamps gain for a wide range

of input sources. The built-in low noise Phono preamp

circuitry is highly accurate and precisely conforms to the

RIAA standard. The Line Output jacks are low

impedance and can work with any sound card.

Housed in an aluminum anodized case, the DJPRE II

can be powered by a wide variety of external supplies. If

you need to amplify and EQ your vinyl records to

interface with an audio workstation, sound card, or

monitor system, the DJ PRE II gives you flawless audio

reproduction in a rugged and reliable package.

FEATURES:

•High accuracy/low noise preamp

•Switchable low cut rumble filter

•Variable preamp gain

•Signal present/clip indicator

•Selectable cartridge loading

•RCA preamp outputs

•Heavy duty extruded chassis

•Designed and developed in the USA

The Facts About Turntable Preamps

Phonograph Records Have Three Basic Problems

1. It is physically impossible to press them with ridges

that allow low frequencies to come out at the same

reproduction level as mid and high frequencies. Bass

compensation is therefore needed during playback.

2. Records produce a certain amount of hiss which is

covered up in post-production by boosting the gain of

the high frequencies before pressing. Counter-EQing

during playback compensates for this.

3. Magnetic cartridges produce a weak signal, which

must be boosted to match the rest of the amplification,

and this too is done during playback. In the mid-1950s,

the Recording Industry Association of America

established compensation standards. The resulting

RIAA preamp has been built into every hi-fi and stereo

amplifier with phono or turntable inputs since then. A

separate RIAA preamp is necessary when you are

connecting a turntable to a mixer that does not have one

built in.

INSTALLATION and OPERATION:

1. Connect the AC adapter to the Power Input on the

DJPRE II and plug the other end into an AC power

outlet. If you are using the unit with a home stereo, see

if your receiver or other component has a "switched"

output, which will power the unit on and off with the rest

of your system.

2. Connect the turntable leads to the Input connectors

on the DJPRE II.

3. If the turntable has a separate ground wire, attach it

to the Ground terminal on the DJPRE II to reduce hum.

4. Connect the RCA or outputs to the appropriate

inputs on your mixer or stereo receiver (Aux input, or an

unused tape input). If the mixer does not have RCA

inputs (on any of the channels) a stereo RCA to dual

mono 1/4” male cable may be needed to connect to the

mixer line inputs.

5. Adjust the gain control so the indicator briefly

indicates clipping (red) during the loudest portions of the

music. If the sound is distorted and the led is red

constantly, turn the gain down.

6. Select the input capacitance that sounds best to

you.

7. Use of the low cut filter rolls off deep bass to

eliminate turntable rumble and "skipping" in heavy feet

traffic areas

APPLICATIONS:

Perfect for: Portable recording, home recording, project

studios.

The DJPREII may be used in a wide variety of

applications and environments. Self-contained in an

extruded enclosure, the Phono preamp is designed for

continuous professional use. Because the unit is

compact and lightweight, mounting location is not

critical.

SPECIFICATIONS:

Frequency Response: 10Hz –50kHz, +/-.5dB

Phono EQ Standard: Conforms to RIAA Curve

THD: .01% Typical @ 1kHz

Hum and Noise: >90dB below clipping

Input Impedance: 47k Ohms in parallel with

either 100pF or 200pF

Maximum Input Level: 40mVrms @1kHz

Maximum Gain: 45dB @ 1kHz

In / Out Connections: RCA

Maximum Output Level: +6dBu (1.4Vrms)

Filter Type/Response: Switchable, Low Cut,

-3dB @ 22Hz

Power Requirements: 7-12V DC or 9-12V AC

@150mA

Dimensions HxWxD (in): 1.85 x 4.6 x 4.5

HxWxD (mm): 47 x 117 x 114

Weight (lbs/kg): 1.25 / .57

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