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User manual Dear client We are proud that you have chosen a soulution preamplifier. In doing so, you have ac- quired an audio component of outstanding quality with exceptional sonic performance which we are sure you will enjoy for many years to come.
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CE-Declaration of Conformity Spemot AG declares that this product conforms to the following directives and stand- ards: Low Voltage Directive 2014/35/EU Electromagnetic Compatibility 2014/30/EU FCC-Notice Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
This secondary, IC based gain control alters the gain without any click or pops. Once the new gain is set, the 757 will revert to the sonically superior path. page...
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757 deemphasis preamplifier User manual Deemphasis curves For optimal playback of your records (vinyl or tape) the 757 provides a wide range of deemphasis curves. Phono: RIAA, DECCA, COLUMBIA, LONDON, TELDEC, NARTB Tape: IEC2-30ips, IEC1-15ips, IEC1-7.5ips, NAB-15ips The use of very fast amplifier stages ensures highly accurate reproduction of the se- lected equalization curve (±0.05dB, 20Hz to 200kHz).
during thunderstorms when leaving the unit unused for longer periods Cabling Unplug the 757 from the mains while connecting or disconnect- ing interconnect cables. Incorrect cabling may cause damage to your 757, amplifier or loudspeakers. Excessive volume due to inappropriate handling may cause hearing damage.
Take care; on the sides of the crate. the unit is heavy! Original packing Please keep the original packing for future transport require- ments. Always ship the 757 deemphasis preamplifier in its orig- inal packing. page...
Setup Remove the 757 deemphasis preamplifier carefully from the base of the wooden crate and position it on a stable surface in an appropriate location ensuring cooling air can circulate and escape unhindered. Do not cover the surface of the 757 deemphasis preamplifier with a cloth or any other object as the complete chassis acts as a heat sink.
757 deemphasis preamplifier User manual Rear and front view Rear view of the 757 deemphasis preamplifier A) AC mains input F) LINK Series 3 B) MC/MM Tape inputs IN 1 … IN 2 G) RS232 – interface C) Inputs for DS AUDIO optical IN 3...
Connections Mains supply (A) Connect the 757 deemphasis preamplifier to the mains supply. Please use a high-qual- ity power cable for optimal sonic results. The 757preamplifier has no power switch. The device will enter standby mode as soon as it is connected to the mains supply.
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Input IN 3 is dedicated to the DS Audio optical cartridges. Connect your optical car- tridge with unbalanced cables to the input IN 3 of the 757 deemphasis preamplifier. For best results we suggest using shielded cables. DS Audio’s optical cartridges are active devices which need to be supplied with power.
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RCA output is not affected by this setting and always remains connected to the ground of the 757 deemphasis preamplifier. The 757 is a non-inverting amplifier. However, the phase of the output signal can be inverted by using the configuration function POLARITY.
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Connect the LINK Series 3 socket to the Link-Com socket on your Series 3 unit. Series 3 units connected to the 757 deemphasis preamplifier via this interface can be cen- trally switched on and off. Use cables with 3.5mm audio jacks. The LINK Series 3 con- nection does not convey any audio signal.
Standby Power-up sequence Ready to operate If the 757 deemphasis preamplifier is on, the power (K) button will put the unit back into standby (power consumption <1W). mute (L) The mute (L) button disconnects or reconnects all inputs and outputs from the analog circuits of 757 deemphasis preamplifier.
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User manual Rotary knob (N) The multi-purpose rotary knob is used to control the gain, select the input, dim the gain, and to select the configuration functions of the 757 deemphasis preamplifier. Operation-Mode Turning the rotary knob (N) changes the gain.
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Display (O) Normal mode 1) Selected input: IN 1 to IN 3 2) Input type: MC, MM or TP = Tape for IN1 and IN2, OP = optical for input IN3 3) Deemphasis curve: INx DEEMPHASIS...
757 deemphasis preamplifier User manual Configuration Function Values Remarks IN 1, IN 2, Defines which input is to be activated IN 3 when the unit is switched on. -40…+20 Defines the gain for the DIM function. OFF 100mHz, Activates the highpass-filter...
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Function Value Remarks < 9 …0… 9> Sets the balance for input IN1. RIAA, DECCA, CO- Defines the deemphasis curve used for in- LUMBIA, TELDEC, put IN1. The selection depends on the in- LONDON, etc. put type (MC/MM or Tape).
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757 deemphasis preamplifier User manual Function Value Remarks +20 … +80 Limits the maximal gain for input IN2. MC: 80dB, MM: 60dB, Tape: 70dB < 9 …0… 9> Sets the balance for input IN2. RIAA, DECCA, CO- Defines the deemphasis curve used for in- LUMBIA, TELDEC, put IN2.
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When set to display off, the display HIGH switches off about 15 seconds. Pre1, Pre2, The remote ID of the 757 is defined. The Phono remote ID of the IR remote control must match (see page 22). Activates the default values (shown in bold) for all the functions.
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Disabled inputs cannot be selected. When scrolling for a new input, disabled inputs will be skipped and their configuration functions unavailable. All inputs disabled If all inputs are disabled the 757 will not function. The follow- ing error messages will appear: page...
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30ips (76.2cm/s) 16kHz 63Hz 1kHz The 757 deemphasis preamplifier features a rms level meter which measures the sig- nal level of its output. The level will be shown in the calibration menus. 10.1 Calibration functions 1) Selected input for tape head calibration 2) Calibration function 3) RMS level of the 757’s output signal...
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Before you start the tape head calibration process you will have to match the deempha- sis curve of the 757 with the deemphasis curve of the test tone tape. The configuration function INx: HEAD CAL. will activate the calibration menus.
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Repeat the procedure for the right channel (INx: Gain R) also adjusting the gain for 0dBu output level. The 757 will remember the gain difference between the two chan- nels which will be applied when selecting the respective input.
757 deemphasis preamplifier User manual Remote control Button Pre-Modus CD-Modus IR-transmitter Operation up to 5m distance and at an angle of ±45°. (2,3) Volume +/- DIM / Volume-Dim Play/Pause (5/6) Select +/- Next / Previous track ...
Firmware Update USB-Stick: The firmware of all soulution products can be updated via the USB port on the back panel. To update firmware, please prepare a USB stick (FAT32 formatted, UBS2.0) containing the required firmware data. You can find the latest firmware for your 757 deemphasis preamplifier on our website www.soulution-audio.com.
CLIPPING. reduce the gain OVERCURRENT If a current > 0.5 A is detected at the output of the 757, it switches off and the display shows OVERCURRENT disconnect the 757 from the mains supply ...
Specifications General Nominal voltage 100 - 240 V, 50-60 Hz Power rating 120 W Consumption Standby <1 W ON regular operation 60 W Inputs IN 1 & IN 2: Magnetic cartridges Gain -40 dB to +80 dB...
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