For the 40th anniversary, audio donated to research with the reference anniversary (27000 euros) a precursor, that want to make everything in the shade with tubes-simplicity and power supply costs.
- Review: audio research reference anniversary
- Data sheet
The gigantic appearance the new 27000 euros expensive tube preamplifier reference anniversary of Audio Research inspires the high Ender spontaneously. She seduces the technician to do this sober to reconsider the case. What must actually make such a tool?
We assume kilo input impedance of the following power amplifier output voltage and 10 by 1 volt, we come to one Ten-thousandth of a Watt. Certainly there is no reason to deal with such a huge power supply in the separate housing as Audio Research at the summa Summarum 34.8 kilo heavy anniversary cars. It therefore involves nothing more than the purity of the supply voltages. Ultimately, the staunch high Ender know just from experience: you can be too expensive. So, he takes the inside the power supply all the more joyful look at.
First, he admired the two cut tape core transformers, which prepare the left channel of the acoustically relevant anode voltages on the right. This 180 Volt keep no less than 16 electrolytic capacitors with 470 and four more with 220 micro Farad actually quite constant. Upstream, composed of inductors and resistors power brake Moreover guarantee the Elko-save that the recharging never gruff takes place.
That didn’t prevent the Americans not to build electronic circuits for final stabilization. Is an Burr-Brown-IC and a Double triode tube control a thick power pentode 6550, which serves as an infinitely fast responding variable resistance as linear regulators.
Not quite so elaborate is the preparation of further supply potential. After all, two more toroidal transformers, Twelve Stabi-ICs, a good dozen Elkes and polishing off many radio frequencies foil capacitors for this found their home in the power supply. A handful of such components can be found in actual, bound via thick cable Trossen prepress.
There she immediately when the amplification tubes on-site clean the relatively high currents for the heating. As used in the reference 5 Audio Research in the anniversary Russian 6 H 30, which compared to the ECC all world Triodes in a lesser THD more power power offer. Now even more, because the reference 5 with Rangers had to come out, have paralleled the American the two tube systems, who’s stuck in a glass bulb.
So finally a DC-separation and on the other hand the music flow work still better, the precursor of cheers instead of already good films got now monster of output coupling capacitors – Teflon- instead of Polyethylene insulation. This effort was not just driven left and right, but also for the symmetric positive – and negative channel. So, the high end may consider continuation of a corresponding twin cable amplifier trains.
That the bewerkstelligte 104-step level control also represents no stumbling block by Maxim noble ICs , the testers took advantage of reference 5 in the spring of. Where the double portion of the anniversary now initially very similar sound. In the balanced connection to the Player CX-7 MP and both precursors provided the Mono blocks MX-R Ayre and the Magico M5 Super boxes for more air and heat than even the Stereoplay reference TEP 3800 by Thorens.
She suggested how had back with more incomprehensible impulsivity and juicy plastic figure. Now, the anniversary began to mature but once. She opened hour by hour larger rooms. With each passing day, it – was more committed musician on the stage without hitting the audience ever with violence around the ears -.
Then, the Thorens for the first time in their high end life was a criticism. “The anniversary brings Jack Johnson’s voice relaxed, natural. The Thorens seems too severe”, dared to express a juror. In fact the American left nice to roll the guitar rhythms of ‘To The Sea’, hand and picks, however, were Articulated, the game appeared richer in beautiful reflections of heights.
When RCA control but the splendour of something in which sagged together, and the Thorens was allowed to wipe the sweat from his brow. The German remains reference; for symmetrical operation, the Crown has from now a two-piece American.
Technology in detail
In fact, a single triode done the bulk of the reinforcement work. In the symmetric case there are top two in the chart the first and the lower right. The two from the incredibly elaborate power supply are supported in their task.
There is still a semiconductor power source, which facilitates the recording level for the cathode . The following, kondensatorlos-coupled Triodes serve mainly to increase the current force of the output. The entire arrangement is without negative feedback loop.
Audio Research reference anniversary
Technical data and test results
|Dimensions (W x H x D)||48.0 x 17.8 x 39.4 cm|
|Immunity gaps (A weighted)|
|Line RCA / XLR||93.0|
|Noise phono MM / MC|
|Line RCA / XLR||304 / 597 ohm|
|Short conclusion||Totally uncompromising built and designed balanced signal processing tube preamp. Provides appropriately high interception chain end additional warmth, LFT and atmosphere.|
|Sound||Absolute top class|
(maximum 70 points)
(maximum 10 points)
(max. 15 points)
|Overall rating (max. 120 points)||very good 89|
|Price / performance||good – very good|
|tested in issue:||11 / 10|