Aurorasound PREDA-III
The fundamental function/responsibility of pre-amplifiers in audio systems is to accept various audio signals, select one, adjust the volume level, and then feed it to the power amplifier with good signal conditioning.
The PREDA-III faithfully executes these tasks by employing a true balanced signal path coupled with a completely independent L/R monaural structure. The PREDA-III accommodates both XLR balanced and RCA unbalanced inputs for devices such as CD players, DACs, phono stages, tape decks, etc. Additionally, the outputs of both XLR balanced and RCA unbalanced perfectly match any type of power amplifier.
The fundamental function/responsibility of pre-amplifiers in audio systems is to accept various audio signals, select one, adjust the volume level, and then feed it to the power amplifier with good signal conditioning.
The PREDA-III faithfully executes these tasks by employing a true balanced signal path coupled with a completely independent L/R monaural structure. The PREDA-III accommodates both XLR balanced and RCA unbalanced inputs for devices such as CD players, DACs, phono stages, tape decks, etc. Additionally, the outputs of both XLR balanced and RCA unbalanced perfectly match any type of power amplifier.
The fundamental function/responsibility of pre-amplifiers in audio systems is to accept various audio signals, select one, adjust the volume level, and then feed it to the power amplifier with good signal conditioning.
The PREDA-III faithfully executes these tasks by employing a true balanced signal path coupled with a completely independent L/R monaural structure. The PREDA-III accommodates both XLR balanced and RCA unbalanced inputs for devices such as CD players, DACs, phono stages, tape decks, etc. Additionally, the outputs of both XLR balanced and RCA unbalanced perfectly match any type of power amplifier.
Key components such as input/output connectors, selectors, amplifier modules, volume controllers, power regulation functions, and a rigid/robust body structure are crucial for achieving superior amplifier performance. The PREDA-III is precision-designed with absolutely no compromises in any of these factors. Its noiseless sector switching, noiseless power on/off, and the touch and feel of the controller knobs enhance your music listening experience. The PREDA-III pre-amplifier not only pairs perfectly with the PADA-300B tube power amplifier but also makes an excellent partner with any tube or transistor power amplifier on the market.
Product Features
1. L/R complete monaural structure in one chassis
The left and right channels are completely independent in terms of input/output signal paths, amplifications, power regulators, and power transformers. Ideal layout with the shortest signal path, optimized placement for channel isolation, and temperature stability and vibration-absorbing make PREDA-III the perfect pre-amplifier.
2. True balanced signal path and amplification
All XLR balanced input signal flows through the XLR balanced and RCA un-balanced signal outputs. RCA un-balanced signal input also transforms to XLR balanced and RCA un-balanced signal outputs. PREDA-III supports any input/output combinations, such as XLR in XLR out, XLR in RCA out, RCA in XLR out, RCA in RCA out.
3. Aurora AMP-2 Rev.4, new development amplifier module
New development amplifier module, “Aurora AMP-2 Rev.4”, this is x1.5 higher speed improvement and lower noise performance in comparison with the original PREDA module. Employs NEC and Toshiba-made discrete transistors/FETs, WIMA film capacitors, and TAKMAN metal foil resistors, which is Bi-Cr-Al materials with brass cap and oxygen free copper lead wire crafted by precision laser trimming. This amplifier module has blue color aluminum top cover to keep operational temperature stability and noise shielding.
4. ALPS made large size precision volume control part
Machined brass 50mm diameter body, very low distortion and hi-fidelity resistor material, gold plated multi wire slider brush on mirror surface resistor. True high-end volume controller with excellent touch and feel deliver smooth and comfortable man/machine interface. This volume is sandwiched between input buffer amp (Aurora Amp module-2 Rev.1) and output buffer amp, in order to make good signal conditioning. No high frequency degradation, neither sound loss in any position of volume setting occur.
5. Neutorik made XLR connectors, Machined brass with rhodium plated RCA connectors
Professional grade connectors for excellent reliable signal interface with life-long durability.
6. Optical encoder with machined aluminum knob for input selector
For input selector function, Burns-made optical encoder and OMRON-made high-reliable relay are controlled by micro controller, in order to make the shortest signal path and noiseless operation. Resume memory is equipped at power on/off sequence.
7. Global phase selector
This function allows changing phase status, either normal or inverse. You can select optimum position to meet recorded medial conditions. Also, works for XLR output hot/cold change to meet your power amplifier.
8. Solid aluminum body
Front panel is of 10mm, side 8mm, top and bottom 5mm thick solid aluminum by precision machining. Very rigid and robust body design supports amplifier circuit boards and power transformers. Cast iron foot insulators absorb unnecessary vibration.
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Input: CH-1,2,3, XLR balanced (1/GND,2/HOT,3/Cold) — CH-4,5,6, RCA un-balanced —Maximum input signal level 8Vrms (XLR) — Input impedance 40KΩ/XRL, 20kΩ/ RCA
Output: XLR balanced x2 — RCA un-balanced x1 — Output impedance 94Ω/XRL, 47Ω/RCA
Gain: 9.5dB
Frequency response: 10Hz – 100kHz, -1.5dB (both of XLR and RCA)
Total Harmonic Distortion, THD+N: XLR 0.0008% (10-90kHz) - RCA 0.001% (10-90kHz)
Signal to Noise Ratio: XLR, 113dB (2Vrm, A-weighted) RCA, 108dB (2Vrm, A-weighted)
Power consumption: 60W, AC100V 50-60Hz, AC110-120V, or AC 220-240V
Size: W420 x D360 x H 112mm max.
Weight: 10.2kg
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