Art Project Series Bedienungsanleitung

Precision Phono Pre

Low Noise Precision Phono Preamp

Project Series

User’s Manual

IMPORTANT SAFETY INSTRUCTION – READ FIRST

This symbol, whenever it appears alerts you to the

presence of uninsulated dangerous voltage inside the

enclosure-voltage that may be sufficient to constitute a 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

manual.

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

any service work to qualified technical personnel only.

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 manual.

INTRODUCTION

Thank you for purchasing Applied Research and Technology’s

Precision Phono Preamp, a high quality standalone phono

preamp. The PPP interfaces Moving Coil (MC) and Moving

Magnet (MM) cartridges to a wide variety of audio systems. An

Extraordinarily low noise amplifier allows connection to MC

cartridges without picking up noise or distortion that transform-

ers can exhibit.

Analog inputs are switchable between Moving Magnet and

Moving Coil. The unit changes both the gain

and the cartridge loading to suit the selected cartridge. A rear

switch allows you to adjust MC cartridge loading between 100

Ohms and 25 Ohms. A low cut filter removes rumble and low

frequency feedback while leaving the audio pristine.

The front gain trim control with the signal present/clip LED

allows you to optimize the output for a wide range of cartridges.

The Precision Phono PS is powered off an external 9 VAC

supply to provide low noise/ high headroom operation.

Upgrade your system in one quick and easy step.

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 audio system.

Housed in an aluminum-anodized case. If you need to amplify

and EQ your vinyl records to interface with an audio work-

station, home audio system, or monitor system, the DJ PRE II

gives you flawless audio reproduction in a rugged and reliable

package.

FEATURES

High accuracy/low noise preamp

Moving Coil/Moving Magnet switchable input

Switchable low-cut rumble filter

Variable preamp gain

Signal present/clip indicator

Selectable Moving Coil loading

Gold plated RCA preamp outputs

External power supply for lower noise

Compact rugged extruded chassis designed for years of

use

Perfect for Connecting a phono cartridge to any audio

system

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 reproduc-

tion level as mid and high frequencies. Bass compensa-

tion 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 (typically

around 5mV), 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 result-

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

amplifier with phono or turntable inputs since then. A sep-

arate RIAA preamp is necessary when you are connecting

a turntable to a mixer that does not have one built in.

4. Moving Coil cartridges typically have a low impedance and

very low output (0.2mV typically). Most will work with a

load between 24 and 100 Ohms. This load may be critical

to the sound of the cartridge.

5. There is a variant on Moving Coil called “high output” that

require a 47k load and have outputs in the 2mV range.

The Precision Phono Pre can accommodate this using the

MM setting and recovering 6-8dB of gain using the level

control.

INSTALLATION and OPERATION

Connect the AC adapter to the Power Input on the Precision

Phono Project Series and plug the other end into an AC power

outlet. Connect the turntable leads to the Input connectors on

the Precision phono Project Series.

If the turntable has a separate ground wire, attach it to the

Ground terminal on the DJPRE II to reduce hum.

Connect the RCA outputs to the appropriate inputs on your

mixer or stereo receiver (Line 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 ¼-inch male cable may be needed

to connect to the mixer line inputs.

APPLICATIONS

Select the Cartridge setting

1. Select the correct mode using the switch (MC/MM). If you

have a high output MC cartridge that requires a 47k load,

choose MM mode.

2. If using MC mode, select the correct load (100 or 24

Ohms).

3. The Load switch only applies to the MC mode. You will

hear a slight difference between the two settings.

a. Start by using the manufacturer’s recommended

load. If you are not sure, select the 100 Ohm

setting. If the high end is exaggerated, the 24

Ohm setting will flatten the response out by

dampening the cartridge resonance.

4. You can adjust the level so you never see the Clip LED

light. There is plenty of dynamic range in the "green" por-

tion of the LED (18dB). In the event you do see the Red

LED just start to come on there is still 10-15dB of head-

room.

Low Cut Filter

The Filter switch, when in the Low Cut position, adds a filter

for removing turntable rumble or other low frequency noise.

The use of the low-cut filter enables you to roll off deep bass to

eliminate turntable rumble and "skipping" in heavy feet traffic

areas.

WARRANTY INFORMATION

Limited Warranty

Applied Research and Technology will provide warranty and

service for this unit in accordance with the following warrants:

Applied Research and Technology, (A R T) warrants to the

original purchaser that this product and the components thereof

will be free from defects in workmanship and materials for a

period of three years from the date of purchase. Applied

Research and Technology will, without charge, repair or

replace, at its option, defective product or component parts

upon prepaid delivery to the factory service department or

authorized service center, accompanied by proof of purchase

date in the form of a valid sales receipt.

Online Registration

We recommend that you register your product online to insure

prompt warranty repair servicing on any repair issues. Please

go to www.artproaudio.com. Select “Support”, then "Product

Registration". Then input your information here.

Exclusions

This warranty does not apply in the event of misuse or abuse of

the product or as a result of unauthorized alterations or repairs.

This warranty is void if the serial number is altered, defaced, or

removed.

A R T reserves the right to make changes in design or make

additions to or improvements upon this product without any

obligation to install the same on products previously manufac-

tured.

A R T shall not be liable for any consequential damages,

including without limitation damages resulting from loss of use.

Some states do not allow limitations of incidental or conse-

quential damages, so the above limitation or exclusion may not

apply to you. This warranty gives you specific rights and you

may have other rights, which vary from state to state.

For units purchased outside the United States, an authorized

distributor of Applied Research and Technology will provide

service

Fill in the following information for your reference:

Date of purchase ___________________

Purchased from ___________________

SERVICE

The following information is provided in the unlikely event that

your unit requires service.

1. Be sure that the unit is the cause of the problem. Check to

make sure the unit has power, all cables are connected

correctly, and the cables themselves are in working condi-

tion. You may want to consult with your dealer for assis-

tance in troubleshooting or testing your particular con-

figuration.

2. If you believe that the ART unit is at fault, go to

www.artproaudio.com.

3. Select “Support”, then “Return Authorization Request” to

request a return authorization number.

4. If you are returning the unit for service, pack the unit in its

original carton or a reasonable substitute. The original

packaging may not be suitable as a shipping carton, so

consider putting the packaged unit in another box for

shipping. Print the RA number clearly on the outside of the

shipping box. Print your return shipping address on the

outside of the box.

5. Include, with your unit, a note with the RA number and

your contact information, including a return shipping ad-

dress (we cannot ship to a P.O. box) and a daytime phone

number, and a description of the problem, preferably at-

tached to the top of the unit. Also include a copy of your

purchase receipt.

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