“The AU-PRE EVO is a seriously considered model, that is as good sounding to ANY big preamps that was in our radar of making”
Triode Lab AuPre EVO tube Preamplifier
With built in MM phono stage
To come up a one-new preamp that replace all our historical preamp models is not an easy task. And how do we improve the already the best of tube pre-amplifier designs for triode / low powered amplifiers? Here is the answer and explanations. To better understand why do you need our Au Pre , is because most preamps out there are aiming for driving bigger powered and solid state amps , they sure have high gain and power character for driving monster amps, they also have the high noise and high level of phase shifts too which never sounded too realistic , refine, and organic (natural). For the rest of the tube preamps - they are simply not refine and quiet enough, why? Because a same quality preamp is 4-5X harder to engineer than a same quality power amp counterpart (and for a real outstanding hifi tube preamp - it’s more like 5-10X harder), and for manufacturing cost, most manufactures can only invest into their cosmetic and functions (such as XLR and Remote, which adds even more material change / signal contamination and NOISE), over absolute quality people buy us for. So we must continue to offer a proper high quality tube preamp for our own triode / lower powered amplifiers , and for those purist audiophile of golden ears. .
Specifications
Gain - 6X / 15.5 dB
2V/RMS Nominal Output
THD+N Less than 0.1% (We actually measured 0.044% only, a even lower figure, but we like to be conservative/humble with our numbers)
Line amp S/N ratio : Better than 85dB below rated output
Line input impedance : 90K ohm
Phono amp gain : 80X/38db @47K Input impedance
Output Impedance : Less than 10K Ohms ( Different brand or different age of tubes will change the impedance : New tubes will have lower impedance and vice versa older tubes will have higher)
Frequency response : Hi level /Line amp section :+/- 0.5dB at 20 to 20KHz
Power consumption…115-120v ,50-60Hz , 40w Approm
396A / 2C51 or equivalent X 1
6SN7 / CV181 x 1
12BH7 x 1 (tube regulation)
5AR4/GZ34 Rectifier Tube x 1 (rectifier stage)
HASHIMOTO Japan Power Transformer
Hammonds Canada Choke Transformer
Volume Pot by Alps Japan
Selector Switch by ELNA Swiss
Triode Lab Aluminum Black Anodized Knobs
CMC USA Gold Plated Audiophile RCA Connectors
Furutech Japan AC Inlet IEC Socket
1877 Phono Canada Gold Plated Ground post
Fuse Info: 5x20 mm Type
DC Fuse - 250ma Fast Blow
AC Inlet Fuse - 1A Max for US Slo Blo / 0.5A Max for 220-240V Slow Blow
More information at:
http://www.triodelab.com/aupre-evo