Unison Research C5P User manual

Brand: Unison Research

Model: C5P

Category: Musical Equipment

Type: User manual

HIGH - END ELECTRONICS

BORN IN ITALY

C5P

USER MANUAL

First of all may we sincerely thank you for choosing this Unison

Researchaudio component. All our products are made with great

care and pride, and and we hope that your new purchase will give you

many years of satisfaction and musical pleasure.

Please take a little time to read the following notes. They will

help you to get the best from your new Unison ResearchC5P.

Every Unison Researchproduct is the fruit of great

experience in electronic design as well as a profound knowledge of

vacuum tubes and how to get the best performance from them. It is

also the result or our passion for making unique and valuable pieces

of audio equipment in which traditional craftsmanship and advanced

electronics join together in harmony.

All our products are made using fine quality materials and each

one is inspected at various stages of the production process to ensure

that it meets our own very high standards.

All the wood detailing is made by expert craftsmen from prized

solid hardwoods and hand-finished using organic laquers to enhance

the natural beauty of the wood. As well as having visual appeal, the

wood parts serve the more serious function of helping to damp

resonance in the metal chassis, with clear benefits to sound quality.

1. UNPACKING

Please check that the packaging is intact and that the product has

not suffered from rough handling during transport. If you are in any

doubt, we recommend that you contact your Authorised Dealer for

advice before proceeding to instal it.

Note that some accessory parts (in particular the valves) may be

packed separately for safety in transport. Please refer to section 4 for

guidance on correct fitting of these items.

IMPORTANT !

After unpacking allow time for the product to reach normal

room temperature before connecting up and switching on. This is

to allow any condensation to dissipate, which might otherwise

cause damage to the electronics. Remember also that

condensation can form when moving the amplifier from a cold

place to a warm room.

Keep the packaging in a safe place. Any time you need to

transport the amplifier it will be best packed safely in its original

carton.

2. FITTING THE VALVES &

AMPLIFIER PLACEMENT

Remove the protective valve cage as detailed in para. 4

Insert the valves in their respective sockets, taking care that the

orientation and position of each (V1, V2 etc) is correct.

Refit the protective valve cage.

When choosing the best position for your Unison Research

C5P please bear in mind the following guidelines.

Valves are sensitive to shock and mechanical vibration which in

turn can affect the quality of sound. For this reason avoid placing the

amplifier close to the loudspeakers. Placement on a sturdy and

resonance-free shelf or equipment support will enable the amplifier to

perform at its best. Always remember to allow adequate ventilation

above and around the valves.

3. CONNECTING THE INPUTS AND

OUTPUTS

On the rear of the amplifier you will find the sockets for

connecting the inputs and outputs.

IMPORTANT !

Ensure that both the preamp and power amp are switched

off before connecting up sources and outputs.

The phono input has an impedance selector to enable close

matching with various types of cartridge. Adjustment of the

impedance is carried out by means of the micro-switch placed on the

rear panel at the left corner of the C5P. The earth (ground) wire from

the turntable should be connected to the gold-plated terminal post

marked GND.

4. REMOVAL OF THE PROTECTIVE

VALVE COVER

The C5P is supplied with a protective cage for the valves. This can be

removed to allow valve fitting and replacement. A hexagonal key is

supplied for this purpose. To remove the cage proceed as follows:

- Insert the hexagonal key into the square holes at each

corner on the top of the valve cage.

- Locate the four screws holding the valve cage in place,

and unscrew each one by two turns.

- Slide the valve cage to the left until it is free from the

screws and then lift it clear.

- Replacement of the valve cage is the reverse of the

above procedure.

5. CONNECTION TO THE MAINS

Before connecting your C5P to the mains, ensure that your local

mains voltage is the same as that indicated on the rear panel.

Never connect the amplifier to AC mains if the local voltage

is higher than that indicated on the rear panel!

The mains fuses are situated in the fuse-holder which is integral

with the IEC mains socket. The correct value of mains fuses is

indicated on the rear panel and in the technical specifications at the

end of this manual. Always replace fuses with new ones of the same

type and value !

6. OPERATION

Warning! Switch on the C5P only after all the input and

output connections (including loudspeaker connections) have

been made and checked !

Before switching on, ensure that the volume control is at zero

(fully anti-clockise), and allow around 30 seconds from switch-on for

initial warm-up and stabilisation of the valves before turning up the

volume.

The C5P takes about 15 minutes from switch-on to reach its best

performance.

If you need to make adjustments thereafter to the source or the

outputs, always remember to turn the volume down to zero before

doing so.

When switching on the C5P for the first time, we recommend

you check that the sound image is correct by playing a piece of music

that you are familiar with. If there is any doubt it will be best to

double check all the connections before proceeding.

7. SAFETY PRECAUTIONS AND

MAINTENANCE

Never operate the amplifier with either the bottom or top covers

removed.

High voltages are present within the C5P, which could cause

severe electric shock.

Do not operate the C5P unless the protective valve cage is

securely fitted !

Do not open the amplifier !

There are no user adjustments inside, and none other than those

described in this manual.

For technical assistance or product service please refer to your

Authorised Dealer or to a Unison Researchauthorised Service

Centre.

Do not spill liquid into the amplifier !

If liquid should be accidentally spilled into the amplifier remove

the mains plug from the wall socket immediately and seek assistance

from an authorised Sevice Centre before attempting to operate it

again.

Before inserting the mains plug into the wall socket ensure that

the switch on the amplifier is in the “OFF” position.

In you do not intend to use the amplifier for a long period of time

we strongly recommend you unplug from the mains at the wall

socket.

Valve replacement.

Replacement of the three line-level valves is carried out after

removal of the protective valve cage as described in Section 4.

For replacement of the phono valves proceed as follows:

- Remove the stainless-steel reflector plate beneath the

line level valves.

- Remove the screw securing the amplifier top cover

- Remove the top cover by moving it forwards.

Cleaning the C5P.

Cleaning should be carried out after switching off and allowing

the amplifier to cool down.

Use a soft dry cloth.

Do not use solvents or alcohol-based detergents.

Do not rub hard on the screen-printed legends on the top cover.

The wood parts are made from natural solid hardwood and will

benefit from occasional cleaning. Do not use anything abrasive, just a

touch of natural wax polish from time to time. This will keep the

lustre and patina of the wood in perfect condition.

Never operate the amplifier when covered! Adequate ventilation

is essential at all times!

Never attempt to remove the valves when the amplifier is

switched on. Always switch off and allow it to cool down.

Valves are shock sensitive, especially when hot. Take care not to

subject the amplifier to shock or vibration.

Replace the valves using others of the same type and quality. If

in doubt, refer to your Authorised Dealer for advice.

8. TECHNICAL SPECIFICATIONS

Type: valve line & phono preamplifier

Mode of Operation: Pure Class A

Max output level: 20V

Input impedance: 50Kohm//47pF (line level)

Output impedance: ~800 Ohm

Distorsion: THD+noise at1 VRMS out: <0.1%

Output phase: non inverting

Gain: 21.5 dB

Bandwidth: 5Hz-100KHz 1 dB

Inputs: phono-CD-AV-tuner-rec

Outputs: 1 x power amplifier

1 x tape

Power consumption: 40 W

Valves (line): 3 x ECC83 (12AX7)

Valves (phono): 3 x ECC83 (12AX7)

Gain (phono): 52 dB approx

RIAA: passive, 0.2 dB (20Hz to

20KHz)

Impedance (phono input): 47K–100-50-22/

100 pF

Weight: 10 kgs.

Dimensions (wxdxh): 27.5 x 48 x h.20 cm

DECLARATION OF CONFORMITY

for

C 5 P

Amplifier

Manufacturer

A.R.I.A. Advanced Research In Audio srl

Via E. Barone, 4

31010 Dosson di Casier (TV)

ITALY

Statement of Conformity

Based on test results using appropriate standards, the product is in conformity with

Electromagnetic Compatibility Directive 89/336/EEC

92/31/EEC

93/68/EEC

Low Voltage Directive 73/23/EEC

93/68/EEC

Sample test

Standard used:

EN 55013-1 : 1993 (and subsequent modifications)

Limits and methods of measurement of radio disturbance

characteristics of broadcast receivers and associated

equipment

EN 61000-3-2 : 1995 (and subsequent modifications)

Electromagnetic compatibility. Part3: Limits – Section 2:

Limits for harmonic current emissions (equipment input

current 16A per phase)

EN 61000-3-3 : 1995 (and subsequent modifications)

Electromagnetic compatibility. Part3: Limits – Section 2:

Limitation of voltage fluctations and flicker in low-voltage

supply systems for equipment with rated current 16A

EN 60335; EN 61305-1; EN 61305-3; CEI 84-2; CEI 84-3; CEI 84-8.

The tests have been performed in a typical configuration.

This Conformity is indicated by the symbol , i.e. « Conformité européenne ».

INDEX :

- Introduction pag. 2

1. Unpacking pag. 2

2. Valve fitting and placing the C5P pag. 3

3. Connecting the inputs and outputs pag. 4

4. Removing the protective valve cage pag. 4

5. Connecting to the mains pag. 5

6. Operation pag. 5

7. Safety precautions and maintenance pag. 6

8. Technical specifications pag. 8

-Declaration of Conformity pag. 9

Unison Researchis the registered trade mark of A.R.I.A. Advanced

Research In Audio S.r.l..

Unison Research C5P User manual

Brand: Unison Research

Model: C5P

Category: Musical Equipment

Type: User manual

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Unison Research C5P User manual

Unison Research C5P User manual

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