Origin live Discovery 2 Manuel utilisateur

Discovery 2 User Manual

Introduction

Thank you for purchasing an Origin Live Discovery

2 MM/MC phono stage. It is our sincere desire

that this high-end audio component will give you

many years of unparalleled listening enjoyment.

Before connecting your phono stage to a system

we highly recommend that you read all of this

manual in order to become familiar with the units

controls and most importantly, specific warnings

and cautions that should be observed.

Throughout this manual handy tips have been

included that should help to ensure that the

phono stage is set up optimally and able to give

you the most transparent and engaging sound

possible.

Please read this first

WARNING :-

Do not plug the phono stage PSU module into an

AC socket if the indicated voltage on the back is

not a close match to the mains voltage where it is

to be used. Many countries especially in Europe

and other parts of the world use 220-240V. The

Discovery 2 PSU module must only be used in

these regions if 230V is indicated with a black dot.

In Canada, the USA and remaining parts of the

world 100-120V is typical therefore the Discovery

2 PSU module should only be used if 115V is

indicated.

WARNING :-

Never disassemble the phono stage modules.

There are no user serviceable parts inside but

there is potentially dangerous mains voltage in

the power supply that can cause serious injuries or

death.

WARNING :-

The Protective Earth connection to the mains

supply is required for safety reasons because

mains voltage is present in the PSU module. The

Earth wire in the mains lead must never therefore

be disconnected or 'lifted'. The protective Earth

however is not connected to the phono stage

0V/Ground connections which offers complete

control over earth loop management. Please note

that the 0V/Ground connections may be

connected to mains Earth through other parts of

the system.

WARNING :-

Never connect the Discovery 2 phono stage

directly to a power amplifier. The unit has no

direct control over the output volume and the

high gain is extremely likely to cause an acoustic

feedback loop that can easily destroy the drive

units in speakers. Always connect the unit to a

device with a volume control and always power

the system on with the volume reduced to a low

level.

WARNING :-

Always mute the amplifier, completely turn down

the master volume control or better still turn off

the main power amplifier when performing any

operations that involve changes to the Discovery 2

phono stage cabling. Make sure that the tonearm

ground wire is in good contact with the ground

post and that it is mated squarely and cleanly.

WARNING :-

The AC power cable supplied with the phono

stage is good but upgradable. Many audio

enthusiasts agree that further sonic improvements

can be obtained by using cables with specialist

materials, components and features used in their

construction. As long as the replacement cable is

fully wired to include a PE (Protective Earth)

connection there is no reason not to use such a

cable. Please see your local Origin Live dealer or

distributor for advice and recommendations.

WARNING :-

In the unlikely event of a fault developing with the

phono stage or power supply module contact

your dealer or distributor where you will receive

expert advice.

Useful Tip :-

Ideally there should be only one connection to

Earth from a common point. If multiple Earth

connections exist then earth loops can occur if

current flows around such loops. This sometimes

results is audible mains hum at 50/60Hz or even

harmonics of these frequencies. If mains hum is

heard when playing vinyl the best approach is to

try and identify the source of the ground loop and

break it at a sensible point that does not

compromise the safe operation of the entire

system. If in doubt, seek professional assistance.

Getting Started

Unpacking

The Discovery 2 phono stage is supplied with the

following items: -

1. MM/MC phono stage module

2. PSU module

3. DC interconnect cable (0.5m)

4. AC power cable (230V/115V suitable for

regional use)

5. This operations manual

If any of these items is missing or if the mains

cable is not suitable for the intended country of

use then please contact the distributor or supplier

from where it was purchased for a suitable

replacement.

Setting Up

Useful Tip :-

It is recommended that the other Hi-Fi system

components are powered off during setup as this

will avoid all kinds of potential mistakes causing

unwanted noise, hum or damage whilst cables are

being plugged in.

Firstly, find a good stable location to place the

PSU and phono stage modules. A high quality Hi-

Fi stand or shelf as part of a dedicated Hi-Fi

installation is preferable.

Carefully place each unit side by side or the phono

stage on top of the PSU module.

Useful Tip :-

The clearance between units when placed on top

of each other is small and the feet will compress a

little under the weight of the PSU module possibly

making contact between the front panels. It is

recommended therefore that if vertical stacking is

preferred, the phono stage module should be

placed on top of the PSU module.

Looking from the rear of the phono stage unit to

the left, connect the earth wire to the binding post.

It can be difficult to turn the Earth nut with larger

phono cables already plugged in therefore this

should be done first.

Useful Tip :-

If a bare earth wire is used, make sure it is

wrapped around the binding post thread in a

clockwise direction looking from the rear and that

no exposed wire is left hanging out that could

make a short to other connectors.

Useful Tip :-

Only hand tighten the nut making sure the wire is

securely gripped. Do not use spanners or other

tools.

Plug the cartridge phono cables into the phono

stage module. These are the left most phono

connectors looking from the back of the unit

marked as INPUT.

Now plug in the phono interconnect cable

between to the phono stage module and the

systems pre-amplifier. There are two sets of

outputs marked POS and NEG. The POS output is

the audio signal in true positive phase in relation

to the cartridge output signal whereas the NEG

signal is the same audio signal in opposite phase.

Both can be used to send the audio signal to two

different pre-amplifiers or they can be combined

and used as a differential output where the pre-

amplifier uses balanced inputs.

Useful Tip :-

A specialist cable may be required in order to

connect the differential output signals to the pre-

amplifier. Many pre-amplifiers require XLR

connections for differential signals whereas other

require DIN or a pair of phono connectors.

Finally, plug the DC power connector between the

PSU module and the phono stage module. The

cable is a mini-XLR type and positively clicks in

place with arrows or alignment indicators facing

upwards. It may be necessary to hold onto the

phono stage or PSU module when making the DC

power connection because the force required is

likely to move the modules.

Useful Tip :-

In order to unplug the DC power cable the button

on the chassis connector of the PSU module will

need to be pressed in to release it. Similarly, in

order to unplug the DC power cable from the

phono stage module the button on the cable

connector will need to be pressed in to release it.

Do not pull on these cables without depressing

the button or else damage to the cable may occur.

Applying Power

Assuming all signal cables have been connected

turn on the phono stage using the switch at the

back of the PSU module (Rocker up is off and

rocker down is on). The 'green' light at the rear of

the PSU module should light immediately and the

'blue' LED at the front of the phono stage module

should also light.

Warm Up Indication

The Discovery 2 phono state is in a cold state

when first powered up. Many audio enthusiasts

believe that sensitive electronics need to be

warmed up before the ultimate sound quality can

be heard therefore whenever power is first applied

to the phono stage the 'blue' LED at the front left

will flash approximately once every 5 seconds for

an hour. This is the minimum amount of time

required for the electronic components to warm

up and settle down thermally.

Front Panel Adjustments

The Discovery 2 phono stage has 3 front panel

controls that adapt the units configuration to suit

a wide variety of available MM and MC cartridges.

These adjustments, whilst intentionally subtle in

some cases can have a significant influence on the

clarity and separation of sounds heard in music so

it is highly recommended to take time to explore

them and not just settle on the first combination

set even though it will sound exceptional right

away.

Input Loading

The Discovery 2 phono stage has a 5 position

impedance switch. The impedance switch controls

the electrical 'load' placed on the cartridges coils.

For moving magnet cartridges the impedance is

usually very high with 47,000 ohms (47K) being

common. For moving coil cartridges the load

impedance is usually very low with 400 ohms

being quite typical.

Useful Tip :-

The manufacturers of moving coil cartridges may

specify a range of possible loading values that can

be quite wide, for example, from 100 ohms to

1000 ohms for just a single cartridge. It is

therefore recommended that the best value

should be determined by experimentation over a

number of hours once the phono stage has fully

warmed up (usually more than 1 hour). When a

manufacturer recommends a particular impedance

value that does not match any of the ones

available on the Discovery 2 phono stage it is

recommended to start with the closest setting to

the recommended value and then experiment

away from that value; increasing the impedance

initially. The audible effects of different impedance

values can often be system dependent and subtle

but can also result in surprising discoveries. The

key is to take time when making the final selection

playing a number of tracks to compare against

each change of input impedance and possibly

repeat the same test over a number of days.

Switch Positions

1. MM (47K ohms) - most moving magnet

cartridges

2. 100 (ohms) - very low impedance moving

coil cartridges

3. 240 (ohms) - low impedance moving coil

cartridges

4. 400 (ohms) - typical impedance moving

coil cartridges

5. 820 (ohms) - higher impedance moving

coil cartridges

Useful Tip :-

As a general rule of electronics engineering the

input impedance loading value should be at least

10 times the output impedance of the cartridges

coil. This is not a hard and fast rule as the effects

of changing impedance may be subtle and

subjective suiting one system combination more

than another. It is however a good starting point if

there are no specific recommendations from the

manufacturer or their recommended range is very

wide.

Input Gain

The Discovery 2 phono stage has a 3 position gain

switch. The least sensitive range is marked as 2.5.

It indicates that for a given input signal of 2.5mV

(peak to peak) the output signal will be 1.0V (peak

to peak), which is suitable for most line level pre

amplifiers or power amplifiers with a volume

control.

Switch Positions

•2.5mV - Suitable for most moving magnet

or very high output moving coil cartridges

•1.0mV - Suitable for low output moving

magnet or high output moving coil

cartridges

•0.25mV - Suitable for most low output

moving coil cartridges

Subsonic Filter

The Discovery 2 phono stage has a built in

subsonic filter. The filter gently reduces low

frequency effects such as record warp, needle

drops, low frequency feedback, bearing noise and

DC offsets that can all cause excessive speaker

cone movement. A filter can be desirable because

these effects if present can unnecessarily heat

amplifiers and speaker coils causing dynamic

range compression and potential damage in

extreme cases. Some audio enthusiasts disapprove

of the use of such filters therefore it can be turned

on or off with a push button switch. When it is

turned on a 'blue' light next to the subsonic

button is lit.

Useful Tip :-

The subsonic filter has absolutely no measurable

effect above 35Hz. Very few vinyl records contain

significant audio this low because it is often

removed by the master disk cutter operator to

prevent adjacent tracks from colliding with each

other or excessive movement from creating

needle jumps. It's effect therefore is sufficiently

subtle that in almost all situations it should have

no impact upon the sound of the audio being

heard. It has most effect below 5Hz, which is

inaudible to human ears and where excessive

displacement of speaker cones can cause damage.

Setup is complete

Congratulations, now that the Discovery 2

phono stage has been connected and

setup all that is left to do is to sit back,

relax and enjoy your favourite music

whilst exploring new insights and depths

previously hidden.

Troubleshooting

No sound is produced

Check that the PSU module has been turned on

When the PSU module is on a green LED

underneath the DC power outlet at the back of the

PSU module lights up. If the LED is not lit then

check the switch is in the on position (rocker down)

and that the cable is fitted correctly with mains

present. Finally, try a different lead that is known

to work.

Check that the preamp stage has power

When the preamp is powered on a blue LED on

the left of the front panel is lit. If this is not lit but

the PSU module is powered on check that the

interconnecting DC cable has been fitted correctly

and the connectors have been pushed in and

locked into position.

(Troubleshooting is a work in progress)

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