advertisement
P h o n o P r e a m p l i f i e r
2
Plinius Jarrah Phono Preamplifier.
This manual has been prepared to help you understand the operation of your amplifier, and to provide information about its design and the variety of ways it may be used.
We have designed and manufactured this preamplifier to reproduce faithfully and accurately, your favourite music. With a little care and a full understanding of the operating recommendations in this manual, your Plinius Jarrah Phono Preamplifier will provide years of high-quality, trouble-free performance.
Serial Number: ..................................................................................
Date of Manufacture: ..................................................................................
Final Test Certified By: ..................................................................................
IMPORTANT: PLEASE TAKE THE TIME TO READ THIS MANUAL
THOROUGHLY BEFORE USING YOUR PREAMPLIFIER.
3
Introduction ...................................................................................................................................Page 3
Precautions ...................................................................................................................................Page 5
Installation and Operation ..............................................................................................................Page 6
Input/Output Connection ................................................................................................................Page 7
Jarrah Features ..............................................................................................................................Page 9
Specifications .............................................................................................................................Page 11
Index ...........................................................................................................................................Page 12
Contact Details ............................................................................................................................Page 13
4
Please take special note of the following precautions before operating your new preamplifier:
• This preamplifier operates at hazardous voltage levels. We recommend that any work requiring removal of the lid be referred to a suitably qualified and experienced service technician.
• DO NOT attempt to connect any input of this preamplifier to its own outputs.
• DO NOT earth any output terminal or connect any of these terminals together without following the instructions in this manual or seeking qualified assistance.
• DO NOT place this preamplifier in any position where liquids or any foreign material may accidentally enter it.
• DO NOT connect any voltage source, short circuit, earth/ground or appliance (other than suitable audio preamplifiers) to the phono preamplifier output terminals.
• DO NOT connect any voltage source, short circuit, earth/ground or appliance (other than suitable phono turntable) to the phono preamplifier input terminals.
5
PLACEMENT AND VENTILATION
Ventilation through and around your Plinius Jarrah Phono Preamplifier should be kept unimpeded, so ensure that the heat vents (slots in the lid) are not covered or restricted in any way. Also refrain from placing the Plinius Jarrah on top of other electronic equipment to avoid RF interference being introduced to the highly sensitive phono stage circuitry.
The Plinius Jarrah design incorporates a very high level of mechanical de-coupling of the input and output. However, it can still be influenced by acoustical feedback in the operating environment. The use of acoustic cones or a suitably spiked preamplifier stand or table, may further enhance the performance of this preamplifier. Consult your PLINIUS
MAINS VOLTAGE CONNECTION
Firstly, check that the mains supply voltage printed on the rear of this preamplifier power supply is similar to the mains supply voltage in your area. If in doubt, please consult your PLINIUS
Mains supply power connection is via the supplied plug-in lead. A standard IEC socket connects the mains power at the preamplifier end, while a local mains plug is required at the wall end.
The wiring code used inside all Plinius product is:
Should a ‘local’ plug need fitting to the wall end of the lead, ensure that a suitably qualified service technician wires the plug correctly.
IMPORTANT: DO NOT POWER UP YOUR PREAMPLIFIER UNTIL YOU
HAVE CONNECTED YOUR INPUT/OUTPUTS CORRECTLY
FOR YOUR SYSTEM, (AS EXPLAINED IN THE NEXT
SECTION).
6
It is important that you connect your preamplifier (outputs) and phono turntable (inputs) to your Plinius
Jarrah Phono Preamplifier correctly to ensure the preamplifier is not damaged, and sounds its best within your system.
Connect your phono turntable to the inputs on the back of the Plinius Jarrah. Make sure you connect the red coded cable to the red RIGHT RCA input, and the black (or white) cable to the black LEFT RCA input.
Also, make sure all the RCA connectors are a snug fit and are inserted all the way in.
Now connect your preamplifier interconnects to the outputs on the Plinius Jarrah, again ensuring you have left and right channels connected in phase. Note that the output of the Jarrah Phono Preamplifier is at
‘line level’ or the same as that of normal CD players, tuners etc. DO NOT connect the output from your
Jarrah to a dedicated preamplifier phono stage as the gain of the Plinius Jarrah and Preamplifier will be mismatched, which could damage the preamplifier phono stage. Use only normal line level preamplifier inputs when connecting the Plinius Jarrah.
If your phono turntable has an earth cable, this can be connected to the gold earth post on the back of the
Plinius Jarrah.
Fit the power supply DIN socket to the back of the Plinius Jarrah. It only fits in one way, and ensure that it is fitted securely.
TERMINATION QUALITY
Quality of the connections must be examined to ensure that high-performance, trouble-free operation is enjoyed. Check that all interconnection cables are snug fitting and inserted all the way in.
PHASING (OR POLARITY)
It is important to achieve good stereo imaging in your listening room. By observing the wiring instructions above, each preamplifier/power amplifier/loudspeaker combination should be in phase. If you experience poor stereo image and/or a lack of bass, check that all interconnection cables and loudspeaker wires have been connected correctly. We recommend that you use one of the easily obtainable ‘test discs’ to help you ensure both phasing and channel orientation are correct. If in doubt, consult your PLINIUS
7
To achieve a sound performance that is correctly aligned to your room, make sure all of the leads carrying signals for the RIGHT channel loudspeaker are connected to the RIGHT input/outputs on your power amplifier/preamplifier/CD player etc. Signals for the LEFT channel should be wired in a similar fashion.
CONNECTING THE MAINS SUPPLY
Now that your Plinius Jarrah Phono Preamplifier is configured to your system correctly, the mains cable can be plugged into the IEC socket on the back of the power supply pack. Re-check all interconnection cables are fitted correctly. Flick the wall switch on. The front LED should light and the Plinius Jarrah is ready to use.
WARM-UP PERIOD
You will find that the Plinius Jarrah will become noticeably ‘warmer’ in sound after being on for a period of time. We usually recommend waiting at least 24 hours before expecting the best quality of sound reproduction from your preamplifier. Also, as the Plinius Jarrah uses very little power while on, we suggest leaving the unit turned on so that it will always be at it’s sonic best.
8
PHONO CARTRIDGE LOADING ADJUSTMENT
The phono cartridge load can be adjusted to suit your particular phono cartridge, using two pairs of internal blue mini-switches.
The Jarrah mini-switches are factory set to a 47kΩ load. Also, switch 1 is set in the on position. This is a
220pF capacitive setting and is usually required for RF suppression. It is not recommended that you turn switch 1 off.
Disconnect the lead from the IEC socket on your Plinius Jarrah. Carefully remove the lid by undoing the six cap screws. Locate the blue mini-switch banks to the rear of the circuit board. Adjust the settings of the five individual switches (remember to do both channels) to give a loading required with reference to the table below.
L
OAD
R
EQUIRED
S
WITCH
N
UMBER
A
ND
S
ETTING
1 2 3 4 5 6
L
OAD
R
EQUIRED
S
WITCH
N
UMBER
A
ND
S
ETTING
1 2 3 4 5 6
8.8Ω
8.9Ω
9.0Ω
9.1Ω
9.7Ω
9.8Ω
7.4Ω
7.5Ω
7.6Ω
7.7Ω
8.0Ω
8.1Ω
8.2Ω
8.3Ω
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
9.9Ω ON
10.0Ω ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
29Ω
30Ω
31Ω
32Ω
41Ω
43Ω
45Ω
47Ω
76Ω
82Ω
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON 90Ω ON
ON 100Ω ON
ON
ON
ON
ON
ON
ON
ON
ON 320Ω ON ON ON
ON 470Ω ON ON
ON
ON
1kΩ
47kΩ
ON ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
Now reassemble your Plinius Jarrah.
9
PHONO GAIN ADJUSTMENT
The phono stage can also be set to high or low gain to suit your phono turntable specifications (high gain is the factory setting).
Disconnect the lead from the IEC socket on your Plinius Jarrah. Carefully remove the lid by undoing the six cap screws. Locate the small black phono jumpers to the centre-front of the circuit board. The gain can now be adjusted noting that high gain (factory setting) is set with jumpers to the front position, and low gain is set with the jumpers towards the rear of the preamplifier. Now reassemble your Plinius Jarrah.
MAINS/LINE FUSE
A Mains/Line fuse is fitted within the IEC socket on the rear of the power supply pack. A small drawer at the bottom of this socket may be removed (after the IEC plug is removed) by levering it out with a flat blade screwdriver. The fuse fitted should be rated at no greater than 0.5 amp normal blow.
IMPORTANT: DO NOT FIT A FUSE WITH A HIGHER RATING.
In the unusual event that this fuse should blow, you must first establish the cause of this failure (such as power surges, damaged mains cable, etc.) before replacing the fuse with one of the same rating and type.
CHANGING THE MAINS/LINE VOLTAGE CONFIGURATION
Should your mains supply voltage vary from the voltage your Plinius Jarrah was supplied configured to, a suitably qualified service technician may alter it.
The two options are:
110 V - 120V
Disconnect the lead from the IEC socket on your Plinius Jarrah power supply. Place the power supply on its feet with the Plinius label to the top. On the rear of the power supply you will see a drawer for the fuse that has a 230V/115V label printed on it. The voltage label that is the correct way up (nearest the top of the power supply) is the voltage at which the power supply is currently set to. Carefully pry the fuse drawer out and turn around before refitting. Make sure that the voltage you require is printed towards the top of the drawer as viewed when the power supply is on its feet.
IMPORTANT: DOUBLE CHECK THE FUSE POSITION BEFORE REFITTING
THE FUSE CARTRIDGE.
10
S FFFF REQUENCY RRRR ESPONSE :::: Phono RIAA network 20Hz to 20kHz ±0.2dB.
S DDDD ISTORTION : Typically <0.05% THD at input level.
S HHHH UM & N OISE :::: -70dB, A weighted (input loaded).
S IIII NPUT SSSS ENSITIVITY :::: 800µV nominal.
S IIII NPUT IIII MPEDANCE
S RRRR ATED OOOO UTPUT LLLL EVEL :
S HHHH EIGHT :
S W IDTH
S DDDD EPTH :
S W EIGHT
11
Date of Manufacture .......................................................................................................................Page 3
IEC Power Connector...............................................................................................................Pages 8,10
Input Terminals ..............................................................................................................................Page 7
Mains/Line Fuse...........................................................................................................................Page 10
Mains/Line Voltage.......................................................................................................................Page 10
Mains Power Supply Pack .......................................................................................................Pages 8,10
Mains Supply Connection........................................................................................................Pages 8,10
Mains Voltage Configuration.........................................................................................................Page 10
Operating Temperature ...................................................................................................................Page 5
Output Terminals............................................................................................................................Page 7
Phasing..........................................................................................................................................Page 7
Phono Cartridge Load Adjustment...................................................................................................Page 9
Phono Gain Adjustment ..................................................................................................................Page 9
Safety Precautions..........................................................................................................................Page 5
Serial Number................................................................................................................................Page 3
Terminations ..................................................................................................................................Page 7
Ventilation......................................................................................................................................Page 5
Warm-Up Period ............................................................................................................................Page 8
12
All operational, technical and descriptive material published here is subject to change at any time without notice. For further product information or queries, please contact us at the address below.
64 6 354 8583
Facsimile: 64 6 354 8586 [email protected]
www.pliniusaudio.com
13
©2000 Audible Technologies.
advertisement
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Related manuals
advertisement