TIDAL Audio Prisma preamp w/phonograph stage, former authorized dealer demonstration unit with low hours of use. Pristine condition, would be very difficult to distinguish from brand new. Built like a tank, this fully balanced line stage also features a world class dual mono, passive RIAA phonograph section. A true end of the road, musically transparent reference level full function preamplifier ideal for the person ready to exit the audiophile upgrade bandwagon.

Playback characteristics are extremely natural & musical, airy, layered and 3-Dimensional with superb resolution and see-through transparency. Backgrounds are inky black, dead quiet. The integrated RIAA phono stage is just absolutely incredible. Mates well with both solid state and vacuum tube amplification.

List - $42,000

Asking - $28,000 o.b.o.

Any questions, please contact me directly at 219.933.8115 or info@artisanfidelity.com

The Absolute Sound TIDAL Prisma Review by Robert Harley

Unit is safely packed up and ready for delivery. Includes all factory accessories, remote control, box, manual and registration papers.

Specifications:

Power supply

connection to power input: 3 silver air-core (silver tube) conductors with connector, burnt in as complete cable-tree before assembling and being the only wires inside the preamp

3 x 25VA ring core transformers

galvanic isolation between the control section (for the whole ADC processed level control) and the complete analogue part, divided into left and right

all together 20 (twenty) separated linear regulated power voltages in total

low noise power supply (left and right) for the analogue amplifier, directly embedded for shortest signal ways directly where it needs to be.

Amplifier section

the whole amp section is built from single parts selected and to each other balanced by hand (discrete match up)

symmetrical amplifier design with only two solid state stages in the signal way

low distortion and almost complete absence of a signature sound because of a complementary circuit topology, following the concept of the ideal for the shortest signal way, true balanced design in mirror-symmetrical layout onto a 4-layer PCB board

Volume control

32 steps volume attenuator with noble-gas filled mini reed relays and super short signal ways fully balanced, means audio-plus and audio-minus do have their own level adjuster, no cascade compromises. This means no open contacts (to prevent corrosion/dust etc.), and only 1 (one) metal-film resistor in the signal way in the best (and direct) position between signal in and signal out.

Galvanic and optical isolated ADC control from an ALPS motor driven potentiometer to control the relay‘s itself, resolution adapted for each volume level (higher for lower levels, lower for higher levels)

Features:

3x true balanced inputs and 1 x MC phono input

when the balanced input is turned off also the matching GND connection is in high resistance (100 Ohm) for reducing ground loop

2 x balanced output

2 x remote power on/off by RJ45 to power amplifiers on and off

phase invertion (to be switched with remote control)

Phono module

MC phono input, unique two-stage concept between the MC-board and the line-stage itself for the shortest possible signal way from cartridge to balanced output (to the power amp)

phono heating for low distortions and perfect temperature of (sound)sensitive parts.

fully balanced input impedance to be chosen by the rotary switch at the backside (ELMA precision switcher controlling mini-reed-relay direct in the circuit (from position 1 up to 12): 50, 80, 100, 130, 160, 200, 266, 330, 400, 570, 800, 2000 ohm)

high-gain/ low-gain selector with a 10dB difference (also in sound)

direct soldered connection to the main board by silver air core solid core wires

voltage gain: 10 dB (line mode) 20 dB (phono mode)

bandwith: 1Hz - 350 kHz (-3 dB)

distortion: < 0.005%

noise: 100 dB (0.5 V output voltage)

input impedance: 10 kOhms

output impedance: < 40 Ohms

DC-coupled symmetrical MC-Class-A amplifier: voltage gain: 55 dB (at 1 kHz), noise: > 80 dB (0.5 mV input voltage), input impedance: 10 - 1.2 kOhms, output impedance: 150 Ohms

dimensions: 17.3" x 4,7" x 15,3" / 44 cm x 13 cm x 39 cm

weight: 70 lbs. / 32 Kg incl. packaging