ABSOLARE Phono Stage User Manual
Contents
1. 2 pin cable connects to the 2 pin sockets the 3 pin cable connects to the 3 pin socket etc The DC connectors lock into the corresponding socket with a twisting ring Connect and lock all four DC power cables before powering up the system Never connect or disconnect any power cable while the unit is operating Some of the pins carry high voltages so it is important to never touch any Power Supply DC Output sockets while the unit is operating Also wait at least 30 seconds beofre disconnecting any cables after powering down the unit 5 2 Signal Cables You can connect two separate arms cartridges to the Signal Stage at the same time The selector switch between the inputs selects the active input channel Ground point is common for both input channels Output is single ended RCA or transformer balanced XLR depending on the version 6 Operating the Unit 6 1 General Operation ABSOLARE Phono Stage will be ready to operate seconds after turning on the power but attaining full performance may take 15 to 30 minutes Expected tube life is 5 000 to 10 000 hours Signal ground and chassis power ground is separate inside the Signal Stage and they are connected by a high pass filter to reduce hum and noise The ground point near the inputs is connected to the chassis ground The outside parts of the RCA output connectors are connected to signal ground Balanced XLR version has transformer balanced output on pins 2 and 3 pin 1 is connected to2. 9 7 Troubleshooting and Maintenance Surface of the unit is ae Clean with a Ac damp cloth No power indicator hectare on both units hein te AC line voltage check the fuse of the Power Supply unit Power indicator light on Power Supply Check all DC power cords but not on Signal Stage Both indicator lights are on but tube Check all DC power cords heaters are not glowing Both indictaor lights are on tube heaters Check all DC power cords are glowing but no sound Check the input selector Check resistor loading custom level is short circuited as factory default Check output cables Noise hum in the sound Check grounding of input cables Check resistor loading 47K setting may increase noise Input selector does not work Check all DC power cords If the problem is persistent contact your nearest ABSOLARE dealer Phono Stage User Guide 0 9 8 Technical Specifications All tube signal path 4 x 6C45PI 3 x ECC83 12AX7 2 x ECC82 12AU7 Two box design 1 Signal Section 1 Power Supply Separate transformers for heaters and signal power Isolated transformer section within the Power Supply Separate DC regulators for input and output section in the Signal Stage Point to point construction Two independent inputs A B with input selector switch 5 factory fixed 1 custom cartridge loading level for each input Custom resistors can be accessed via input tube cover on
3. contain very high voltages There are no serviceable parts inside either chassis other than internal tubes and custom loading resistors Do not open bottom covers Do not operate the unit without first connecting and locking all DC power cables Phono Stage User Guide 0 9 3 Unpacking and Placement The Signal Stage and Power Supply are contained in two separate chassis After opening the top cover of the crate remove the upper layer of hard foam material You can then lift the units from the crate using the cloth underneath each chassis Both the Power Supply and the Signal Stage become very hot during operation You should always place them on feet and leave at least 2 inches 5 cm clearance above both units to allow sufficient ventilation Feet can affect the sound quality significantly Feet should be placed directly under the aluminium base plate not the MDF leather plate There are three areas where the Aluminium base plate is exposed through openings in the bottom MDF leather plate These areas are where feet should be placed You can use either three or four feet Adjusting their position will also affect the sound to varying degrees depending on the type of rack location or interaction with other equipment For most situations the arrangement as shown in the diagram below is a good starting point Phono Stage User Guide 0 9 4 Installing the Tubes There are total of nine tubes in the Signal Section Five are visib
4. ABSOLARE Phono Stage User Manual Phono Stage User Guide 0 9 Contents LODEDE e EE 4 2 Safety Issues and Warnings i 4 3 UNPACKING ana Placement E 5 di INnStal Ie Ne UD 6 5 Conmectine the Eeer 8 E De el scan aaiias eia andar A A E NEE E dubai eva A a stage 8 Sae DIE E E ee E 8 O Operant e UM erinra n 8 GA General Ren 8 6 2 Installing Changing Custom Load Resletors ii 9 7 Troubleshooting and Maintenance i 10 STE anaE Eo E E A E EET E E N E 11 Phono Stage User Guide 0 9 1 General Description The ABSOLARE Phono Stage is a dual chassis phono preamplifier with an all tube signal path and point to point construction The first chassis contains the Signal Stage The second chassis contains the separate Power Supply Inside the Power Supply transformers are also isolated from the DC regulators by an internal partition to further reduce noise and hum There are two dedicated heater and signal power transformers and also separate DC regulators for input and output sections of the Signal Stage Two adjustable loading resistance inputs are directly coupled to input tubes Balanced XLR and unbalanced RCA output versions are available 2 Safety Issues and Warnings Be sure the voltage setting of the unit matches the applied voltage to power input Operating voltage is fixed and can be changed by an authorized service agent only Do not touch tubes while operating Tubes are extremely hot devices and also
5. chassis ground There are no adjustments other than cartridge loading As you can connect two separate arms cartridges to the signal stage at the same time there are separate loading options for each input To provide more levels in total and a better match for each cartridge load values are not the same between channels If the preset levels do not match the desired value exactly you can install your own load resistors for each input channel see section 6 2 for installing custom resistors 8 Phono Stage User Guide 0 9 There are five factory fixed and one custom load level for each input Custom resistors can be accessed via input tube cover on the back of the unit Custom level is short circuited as factory default Input A load levels 68 Q 150 O 330 O 680 Q 47 KO custom installed value Input B load levels 47 O 100 O 220 O 470 0 1 KO custom installed value Input capacitance is fixed at 100pF You can use the 47K setting for MM cartridges Ko CR LOAD i Va TEST AD 6 2 Installing Changing Custom Load Resistors Custom load resistors are reachable from under the small middle back cover First you should remove the four hex screws on the corners of the small cover on the rear panel Then you can change the resistors to any desired value There are straight wires in place of the resistors as the factory default Resistors for input A Resistors for input B ps Gar tz A Phono Stage User Guide 0
6. le within the upper recess on top of the chassis Four are located inside the unit accessible only by removing the small cover on the rear panel Placement of the upper tubes is shown below 12AU7 ECC82 12AX7 ECC83 12AX7 ECC83 12AX7 ECC83 12AU7 ECC82 FRONT SIDE You may receive the unit with the internal tubes already pre installed If this is not the case or you wish to replace them yourself you should remove the four small hex screws on the corners of the small cover on the rear panel SCREWS a e E ee q eg ABSOLARE Phono Preamplifier ed e i GE dE a Phono Stage User Guide 0 9 Once the small cover has been removed four 6C45PI WE417 tubes should be installed into the four sockets that are visible within the chassis Please check for the correct orientation of tube pins before installing into the sockets PLEASE NOTE WE417 tubes have different pin configuration to 6C45PI tubes You must either have the WE417 version of the phono stage or use a conversion adapter Otherwise the unit will not work and permanent damage may occur TUBES Phono Stage User Guide 0 9 5 Connecting the Cables 5 1 Power cables AC power input is via a standard IEC socket on the Power Supply Operating voltage can be changed by an authorized service agent only There are four DC power cables connecting the Power Supply and the Signal Stage Each DC connection has a different number of pins The
7. the back of the unit Input A loading 68 ohm 150 ohm 330 ohm 680 ohm 47 Kohm custom value Input B loading 47 ohm 1000hm 220 ohm 470 ohm 1 Kohm custom value Input capacitance 100 pF Direct coupling to input no step up transformer 61 dB fixed gain Single ended or balanced output options Output impedance 325 ohms Bandwidth 20 Hz 20 KHz Standard RIAA equalization Dimensions 38 2 x 54 5 x 14 6 cm W x D x H per chassis excluding feet Weight 20 kg Signal Section 22 kg Power Supply Phono Stage User Guide 0 9 ABSOLARE USA LLC 40 Pemberton Road Nashua New Hampshire 03063 Phone 212 229 1842 E mail info absolare com ABSOLARE SERVICE EUROPE Mozartstraat 157 1962AL Heemskerk Netherlands Phone 31 61 399 3049 E mail info absolare nl 2015 ABSOLARE
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