Precision Power TD 1250 Bedienungsanleitung

CONGRATULATIONS ENDPANEL LAYOUT

FEATURES / SPECIFICATIONS ENDPANEL LAYOUT (cont.)

INSTALLATION TROUBLESHOOTING

WIRING TROUBLESHOOTING (cont.)

POWER / GROUND TROUBLESHOOTING (cont.)

CONNECTIONS TROUBLESHOOTING (cont.)

CONNECTIONS (cont.) SYSTEM DIAGRAM 1 / 2

INPUTS / CONNECTIONS BLOCK DIAGRAM

INPUTS WARRANTY

CONTENTS

(click on a topic to view)

Owners Manual TD 1250

The extended use of a high powered audio system may

result in hearing loss or damage. While TUBE DRIVER

systems are capable of

"Concert Level"

volumes with

incredible accuracy, they are also designed for you to

enjoy at more reasonable levels all of the sonic subtleties

created by musicians. Please observe all local sound

ordinances.

Thank you for choosing TUBE DRIVER. Tube Drivers musicality and absolute sonic

transparency allow accurate reproduction of recorded music enabling you to hear as well as

feelthemusicthewaytheartistintended.Thesehandcraftedamplifiersfeaturefulldifferential

“front ends” based upon a true instrumentation amplifier topology. Tube Drivers utilize only

the highest quality Svetlana tubes in our unique configurations. All of the internal amplifier

stages have been designed to have ultra-wide bandwidth together with a high degree of

linearity.Thetubesusedinthese amplifiers provide both voltage gain andcurrentgain where

they are connected in Cascode and Cathode Follower configurations. D.C. servos are used

to control any D.C. offset.These servos are critically positioned in the circuit so that not only

is D.C. offset eliminated but also any subtle differences between tubes are internally

compensated. These tube stages are then connected to a high current BiPolar output stage

that uses the same audiophile quality Sanken output devices featured in the PrecisionPower

2500F1.The output stages receive their power from a highly regulated D.C. power supply

which enhances their performance significantly. Very little negative feedback is used. Low

feedback designs have greatly improved sound quality having an extremely warm and open

soundwithenhancedmusicalityconsistentwithonlythehighestqualityhometubeamplifiers.

Service

Model

Serial Number

Purchase Date

Do not attempt to service TUBE DRIVER products yourself.

Performing exploratory surgery on your audio equipment yourself

will void the warranty. Many parts of your TUBE DRIVER gear

are custom built to our specifications. Our factory parts are not

made available to anyone else nor are they for sale. Our goal

is to make sure that your TUBE DRIVER product will always

sound as good as the day it was purchased. Contact your

authorized TUBE DRIVER dealer about obtaining any warranty

service through TUBE DRIVER.(See Warranty insde back cover)

Caution!

BACKTO CONTENTS

Length = 17”

Height = 3.2”

Width = 9.25”

TD1250

Dimensions

TD1250

250 WRMS x 1 @ 4 Ohms

500 WRMS x 1 @ 2 Ohms

Continuous Output Power

Power Bandwidth: 5 Hz -50 KHz

Total Harmonic Distortion: 0.2% or less (A-weighted)

Input Topology: Balanced Differential

Input Sensitivity: 500mV - 12 volts RMS

Input Impedance: 10K Ohms

Output Impedance: 2 - 16 Ohms

Specifications

Fully regulated adaptive MosFET power supply

Balanced Mini-Din Input

High Voltage Input Capability with Input Attenuation Switch

Gold Plated RCA Input connectors

Three Year Warranty when installed by an Authorized

dealer

Completely Designed and Handcrafted in the USA

BACK TO CONTENTS

Recommended Fuse Rating for TD1250 is 100 Amps

You will need to install an in-line fuse or circuit breaker in the power wire

within 18” of the battery. This fuse or circuit breaker protects your vehicle

from fire in case the power wire shorts to the vehicle body.If you areonlyusing

one amplifier, use the recommended fuse rating. If you are using more than one

amplifier, add up the fuse ratings for all amplifiers, and use this sum for your main

fuse or circuit breaker. Use a power distribution block or fuse near your amplifiers

with the appropriate fuse for each individual power wire.

The information below is a basic formula you can use to determine approximate

current draw. A50% amplifier efficiency rating is used as an average. This formula

isonly a guideline. Usingwireofalarger gauge can onlyimprovethecurrenttransfer

of your system. Do not use smaller gauge wire.

Total 4-Ohm rated RMS output x 2 =Total Input Wattage

Total Input Wattage/SupplyVoltage = Current Draw (in Amps)

Example:

Your TD1250 has 1 channels at 250 watts RMS into 4-Ohms

(250 x 2 =500). You would use the formula below:

250W x 2 = 500W/12.5V = 40 AmpsTotal Current Draw

Fuse Requirements

Tools/Parts Needed for Installation (not supplied)

Small flat blade screwdriver

Phillips screwdriver (#2 or medium sized)

Wire cutters

Wire strippers

4 – #6 round head screws, and 1 – #8 sheet metal screw

(or nut, bolt, and star washer)

2 – Ring connectors (large enough to accommodate your method of grounding)

In-line fuse or circuit breaker — see fuse requirements below

Power and groundwire — see Power Wire Calculator on the next page

Speaker wire — 16 gauge or larger

Grommets (sized to work with the power wire you plan to use in your installa-

tion)

Tube of silicone sealant

BACKTO CONTENTS

Warning!

Amplifiers Generate Heat!

You can mount the TUBE DRIVER in any position, even upside-down. However,

you must maintain proper airflow. Do not install your TUBE DRIVER under

carpets or enclose it behind airtight panels. In trunk-mounted applications, be sure

to provide venting for air circulation. Let the amplifier breathe. Without adequate

air circulation, your Tube Driver will turn itself down to protect itself.

Power Wire Calculator

Mounting

YouneedtomountyourTUBEDRIVER securelyinyourvehicletopreventdamage.

You may mount the system right-side up, on its side, or upside-down, provided

there is adequate ventilation.

Recommended MINIMUM Gauge

20 - 35 12 10 8 8 6 6 8 4

0 - 20 14 12 12 10 10 8 8 8

35 - 50 10 8 8 6 6 4 4 4

50 - 65 8 8 6 4 4 4 4 2

65 - 85 6 6 4 4 2 2 2 0

85 - 105 6 6 4 2 2 2 2 0

105 - 125 4 4 4 2 2 0 0 0

125 - 150 2 2 2 2 0 0 0 0

Total Current Draw Length of Wire to Run (in Feet)

(in Amps) < 3 4 - 7 7 - 10 10 - 13 13-16 16-19 19-22 22-28

BACKTO CONTENTS

Warning!

To prevent a short to ground, disconnect the negative (-) terminal of the system’s

battery before you begin. If the power cable shorts to ground, current will continue

to flow until the short is opened, the main fuse blows, the battery explodes, or the

wire melts.

Reconnect the terminal only after you make all connections.

Grounding

Your TUBEDRIVER is designed to operate from a car’s positive 12 volt, negative

ground electrical system.The ground wire should be the same gauge as the power

wire indicated in the chart.

The main power cable should run from the amplifier location, through or under the

vehicle,tothe battery.You must useagrommet wherever the cable passes through

a steel panel to prevent an eventual short to ground.

The ground connection is the most important part of any installation. If the

connections are poor and/or the resistance is high, the resulting drops in voltage

will rob you of amplifier power and may allow noise to enter your system. Your new

Tube Driver features a fully regulated power supply. It will make full power even if

thevoltage changes. It willdrawmore current at lowervoltages to make that power.

Lower voltage and high cable resistance means more total current draw. Using a

digitalmultimeter(DMM),trytogetcableresistanceaslowaspossible.Ifresistance

is too high, use a larger gauge wire. Try to ground your system to a single point in

thevehicle. Inlargersystems,use distribution blocksandrun both powerandground

cables directly to the system battery.

Remote Turn-on

IMPORTANT!Your newTube Driver is equipped with our unique tube warm-up

circuit. When your system is turned on, The LED labeled “WARM UP” will

illuminate and full power is applied to the tube heaters for approx.35 seconds.

The internal fan will then turn on and two seconds later the amp outputs will

be switched on.The system will then play as normal.

You must connect a wire to the remote (REM) terminal (located in the speaker

terminal plug) of your amplifier to power on your TUBEDRIVER. The source unit

normally provides a remote amp turn-on or power antenna lead that provides this

+12 volts when you turn on the unit.

• Run a wire from the chosen turn-on lead to the REM connection

of your TUBEDRIVER (See Endpanel Layout: Page 10)

• Tighten the connection

BACKTO CONTENTS

Follow these simple instructions and refer to the diagram below to

make your speaker connections:

•Using at least 16 gauge wire, run wire from the speakers to the

amplifier(s) using the same precautions that you followed for

running the power, ground, and remote wires

• Cut off excess wire

• Use wire strippers to strip 1/4 inch of insulation at the end of

the wires

• Attach the speaker wires to the amplifier’s

POWERLOCK

connector and plug

it in

Speaker Connections

Power

lock

Connector

BACKTO CONTENTS

Connections

All multi-channel TUBE DRIVERS are capable of being bridged into a 4-

Ohm mono output without switches or bridging modules.

Your new Model 1250 is a mono (single channel) amplifier. It cannot

be bridged. The two pairs of speaker terminals are in parallel, so

connecting two 4 ohm woofers (one on each pair of terminals) would

result in a 2 ohm load to the amplifier.

Note:A total impedance of less than 2-ohms may trigger the protection

circuitry causing reduced output and may eventually damage your

amplifier.

Bridging

(Two four ohm subwoofers connected in parallel = two ohm load on the amplifier.)

BACKTO CONTENTS

Input Jacks

The TUBE DRIVER includes both RCA and Mini-Din (balanced) inputs. The

supplied RCAconnections allow you to use TUBEDRIVERwith other brands

of audio gear.

Our Differential RCA inputs provide a dramatic improvement in

noise reduction over standard RCA input types. Our fully balanced Mini-DIN

connection system features high signal voltage capability and the highest

possible sound quality.A single cable for 2 channels also simplifies installation.

Cables from the source unit, non-powered equalizer, or crossover go here.

Both left and right inputs should be used for maximum amplifier output.

Standard Coaxial RCA Cables

Standard coaxial RCA cables utilize two connections: a center wire (signal

positive) attached to the center pin of the RCA connector along with a braided

outer conductor (signal negative) connected to the outer ring of the RCA

connector. This design almost always allows radiated noise to enter the system,

since the signal is not well protected.

Balanced Mini-DIN Cable

Balanced Mini-Din connections use six pins and one grounding ring. Pins 1 and

2 are open connections, normally they would carry your remote turn on voltage.

Pins3/4 and5/6 areapair oftwistedconductors for themusicsignal.Thetwisting

of the inner wires rejects or eliminates radiated noise by more than 30 dB. The

inner pair of wires are then protected by an outer shield connected to Pin 1.This

means the music signals can be kept as far away as possible from the power

and chassis ground paths of other circuitry, allowing the transmission of pure

music between points while protecting it from noise generating equipment and

wiring present in the vehicle. The diagram below shows the pin configuration

for the Mini-Din connections.

Balanced Inputs

BACKTO CONTENTS

Input Gain Control

There is an Input Gain Control located on the end panel under the RCA

input jacks. This is not a volume control! This control matches the output

signal voltage of the source unit to the amplifier inputs.

By turning the control clockwise (to the right), the inputs of the amplifier

become more sensitive and will allow a weak signal of approximately 1/2

volt to drive the amplifier to full power. At the same time, while an amplifier

with its level control at maximum is able to drive a weak signal, it also picks

up and amplifies any noises lurking in the background, such as a brake light

pop,

alternator

whine,

or ignition

tick.

Increasing the signal voltage to the amplifier by using a high output source

unit (or a TUBE DRIVER LD-3) makes the music much louder. By turning

the level control counterclockwise (to the left), the amp inputs will be less

sensitive. The amp will reproduce music at full power while making any

noisefloorinsignificant.YourTUBEDRIVER accepts signal levels ofupto

12 volts RMS.

Setting Input Gain

1. Set the Input Gain Control to just above the lowest setting.

2. Turn the master volume on the source unit or pre-amp to almost full

volume.

3. With music playing, slowly increase each Input Gain Control until you

hear distortion. Turn down the Gain Control until the distortion stops.

BACKTO CONTENTS

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