Tsakiridis Alexander

2758 €

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Alexander is a class A line preamplifier with MM phono stage (MC upon request). It uses separate transformers for the power supplies and a choke for the filtering of the High voltage supply which is stabilized for all tubes.

It features 1 XLR input and 1 XLR output which are connected in single ended manner (pseudo-balanced). With low output impedance, Alexander can drive any power amplifier. All electronic components are through hole type soldered by hand.

Alexander uses 8 signal tubes, 4 for the line stage and 4 for the phono stage. It provides 5 line inputs in addition to the phono input, a tape output and 2 pre outputs. Alexander also has a thru input. The signal connected to this input appears to the output of the preamplifier when Alexander is OFF.

Gold plated RCA and XLR connectors are implemented for the signal inputs/outputs.

For the volume control the classic blue Alps is used. An elegant remote control in aluminum case offers you control over all the functions of Alexander preamplifier. Volume control, input selection and mute.

Carefully selected values and types of the electronic components contribute to the reliable circuits operation and the high sound quality of the preamplifier. Alexander uses Mundorf Evo signal capacitor. The meticulous PCB design ensures excellent behavior in SNR, distortion and channel separation.

Inner signal wiring with high quality shielded signal cable. Power wiring uses high quality copper cables of more-than-needed AWG gauge, to achieve low impedance power transfer. All power cables are twisted in pairs to minimize the electromagnetic interference.

The handmade power transformers and choke are thoroughly tested for quality and reliability. The positioning of the transformers is such that minimizes the magnetic interference with the tube circuits. Furthermore the transformers have copper foil shielding.

FEATURES & SPECS

Inputs	5 line inputs (4 RCA, 1 XLR) & 1 Through input
Phono input	MM cartridge
Outputs	2 pre outputs (1 RCA, 1 XLR) & 1 Tape output
Input selection	High grade signal relays
Input/Output connectors	RCA & XLR gold plated
Remote control	Yes
Volume control	Blue Alps
Informative Display	Yes
Power supply capacitors	United Chemicon 105 °C
Signal capacitors	Mundorf Evo capacitors
Power resistors	Carbon film 5% tolerance
Low power resistors	Metal film 1% tolerance
Power transformers	2 Handmade 40 W each & 1 choke
Phono stage tubes	2 × 12AX7 & 2 × 12AT7
Line stage tubes	4 × 12AT7
Voltage Gain	14 dB
Input impedance	47 kΩ
Output impedance	200 Ω
Maximum Output Voltage	20 V rms
Input Overload Voltage	4 V rms
Signal to Noise Ratio (SNR)	90 dB
Channel separation	78 dB
Rise time	3 µs @ 10 kHz
Harmonic distortion	1 V @ 1 kHz → 0.40%
Frequency response	–3 dB, 5 Hz – 100,000 Hz
Power consumption	55 W
Weight	12 kg
Dimensions (W × D × H)	43 × 35 × 12 cm

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