Audio E 550 E

Extrait du fichier (au format texte) :

Review in AUDIO magazine (Germany), March 2006
Accuphase Integrated Amplifier E-550

Precision Job by Joachim Pfeiffer

The biggest and dearest integrated amplifier by Accuphase tested exclusively in AUDIO.
Not really a big surprise on the first sight. The new integrated flagship from
Accuphase, the E-550, comes just slightly higher and a tad less wider than its already legendary predecessor E-530. The formerly rather matt side-cheeks are showing high-gloss now, and - I'm sure you'll be pleased to read this - its retail price has come down by an enjoyable margin! Well, the new model does not look really new and the old one not really old. So, what? Just a barely noticeable facelift?
You've done the wrong pools! This Accuphase-flagship operating in Class-A
mode boasts - to stay in the picture - of its new "engine" of which the key feature is without doubt the highly elaborate volume control circuitry dubbed AAVA (Accuphase
Analogue Vari-gain Amplifier). This is something that to this date had been reserved exclusively for the top-of-the-line and much more expensive preamplifiers from the same maker. Now, what's behind and how can the user take benefit of all this?
In conventional amplifiers, i.e. in the E-530 also, potentiometers are taking care of the volume control. Evidently, by turning the knob clockwise the music becomes louder and likewise is attenuated if the knob is turned to the left. And no matter how elaborate a potentiometer has been constructed and built there are nevertheless inherent weaknesses by principle. To wit: impedance is always increasing when the output level is increased which in turn is causing a higher noise floor. And even worse: channel imbalances as well as crosstalk between channels may spoil the listening pleasure, in particular when the potentiometer is in a position between 8 and 9 o'clock respectively beyond 11 o'clock and therefore in ranges below and distinctly above the average room volume level.
AAVA - the electronic trick
Fighting this root of all evil has ever since been put on top of the agenda by the Accuphase engineers: they simply made use of the best potentiometers on the market and consciously refrained from employing digital regulators which are (rightly so) said to rob the sound colour and resolution.
The analogue AAVA circuitry was designed to regulate the signal from soft to loud with absolutely no losses. The input signal first meets an array of 16 parallel voltage/current converters which are transforming the signal voltage into differently sized "current-figures" whereby from one to the next the transformation ratio is downsized by one half. The resulting current portions can be combined in any way, yet the switching operation is controlled by a CPU according to the position of the volume control knob. Altogether there are 216 or 65,365 combinations possible.

At first the voltage of the input signal is via AAVA converted into a signal current whereupon gain is set by a turn of the volume knob. Finally, the combined current is converted back into a signal voltage. This elaborate measure is to alter neither frequency response nor impedance and therefore has also no influence on the noise.
That AAVA makes sense indeed could be confirmed in the many listening sessions in which the E-550 had to mount the boxing ring versus it predecessor.
Albeit not so clearly in the classic test configuration, in which both candidates could

Les promotions



Stereo P 5000 German
Stereo P 5000 German
22/06/2024 - www.accuphase.com
HIFI EXKLUSIV ENDSTUFE sen Qualität der C-2400 lässt sich durch dieses vermeintlich untergeordnete  Modell umsetzen? In Anbetracht der Tatsache, dass die P5000 prinzipiell eine kleinere Ausgabe der P-7000 darstellt und somit von den letzten Segnungen Accuphaseschen Gehirnschmalzes profitieren darf, stehen die Signale dafür auf grün, hat man sich doch wieder einmal eine Menge einfallen lassen, um dem Thema Endverstärker etwas Neues abzuringen. Seit Jahren bereits setzen die Japaner bekanntlich...

E 480 Hifiundrecords 04 2019 Eng
E 480 Hifiundrecords 04 2019 Eng
22/06/2024 - www.accuphase.com
[English Translation Test Accuphase E-480 / hifi & records 04/2019] Revolutionary With the E-480 Accuphase is presenting the successor to the E-470. But there's a lot more behind it than just a cosmetic facelift. Already the visual differences between the new Accuphase E-480 integrated amplifier and its precursor E-470 are clearly obvious and immediately discernible to the sympathetic eyes of the beholder. The status LEDs are no longer concealed behind the display glass cover and have instead...

P 4100 C 2110 Stereoplay E
P 4100 C 2110 Stereoplay E
22/06/2024 - www.accuphase.com
Full review in STEREOPLAY magazine (Germany), September 2008 Accuphase Pre-Amplifier C-2110 / Power Amplifier P-4100 Phase Two by Johannes Maier & Holger Biermann Having been rather on the conservative side for many years, Accuphase is evidently on the way to wrest the last decibel from amplifier physics by employing new technologies. So, does the new combination of pre- and power amplifier sound better than ever before? Hardly any other high-end manufacturer knows it better than Accuphase: in the...

A 45 Stereoplay 03 07
A 45 Stereoplay 03 07
22/06/2024 - www.accuphase.com
Test & Technik I Endverstärker 120 stereoplay 3/2007 www.stereoplay.de ccuphase: Dieser Name flößt Respekt ein. Weil er für Modellkonstanz, Langlebigkeit sowie stets wiedererkennbaren sehr guten Klang steht. Doch es wird gern übersehen, dass in Japan innovative Entwickler sitzen, die es meisterlich verstehen, neue Ideen mit klassischbewährten Schaltungen zu verbinden. Ein Beispiel ist die ausgefeilte Class-A-Technik des Endverstärker A 45 für 7700 Euro. Diese Betriebsart, bei der ständig ein...

La technologie qui enrichit votre vie - Accuphase
La technologie qui enrichit votre vie - Accuphase
10/04/2020 - www.accuphase.com
La technologie qui enrichit votre vie A-200 Amplificateur de puissance monophonique de classe A performant dote de la technologie MOS-FET. Pour CLASSE CLASSE AA 100 100 W/8 W/8 ohms ohms AMPLIFICATEUR AMPLIFICATEUR garantir la meilleure reponse des enceintes, le A-200 comprend deux circuits d-amplification separes, mais DE totalement identiques et conduits en parallele, un facteur d-amortissement de 1 000 et des commutateurs DE PUISSANCE PUISSANCE MONOPHONIQUE MONOPHONIQUE semi-conducteurs (MOS-FET)...

E 550 E
E 550 E
22/06/2024 - www.accuphase.com
%Ï Revolutionary AAVA volume control %Ï Power MOS-FETs in triple parallel push-pull configuration driven in pure class A %Ï Current feedback principle and MCS+ topology in power amplifier section %Ï Logic-control relays for straight and short signal paths %Ï Sturdy power supply with large toroidal transformer and high filtering capacity %Ï EXT PRE button allows independent use of preamplifier and power amplifier sections The ultimate integrated pure class A amplifier  Power MOS-FETs arranged in...

A 45 Stereoplay 03 07e
A 45 Stereoplay 03 07e
22/06/2024 - www.accuphase.com
Full review in Stereoplay magazine (Germany), Issue March 2007 Accuphase Class-A Stereo Power Amplifier A-45 Gentle Giant by Dalibor Beric When Accuphase is about to launch a new power amplifier, be sure the entire hi-fi world will be all ears! Stereoplay however was the first to audition this majestic machine. Accuphase: this name is certainly commanding everybody's respect as it stands for model consistency, longevity and an always recognisable, very good sound. Yet it may sometimes be overlooked...

Image Dp 500 0207 E
Image Dp 500 0207 E
22/06/2024 - www.accuphase.com
Review in image hifi magazine (Germany), Issue 2/2007 Accuphase CD Player DP-500 by Dirk Sommer Accuphase has ventured a step back: the new digital player is to render CD only. However this was all but a half-hearted decision and rather carried out in an uncompromising manner, as the device itself is clearly demonstrating. And this is why already at this stage I'm paying my highest tribute to the Japanese. In the past year I was more busy with "digital things" than may be assumed by merely looking...
 
 

nu_p207_SS_Eng (Page 2)
nu_p207_SS_Eng (Page 2)
13/02/2012 - www.samsung.com
CARACTÉRISTIQUES PRINCIPALES Services GPS Jeux java " Grâce au GPS intégré, il vous sera beaucoup plus difficile de vous perdre " Vous ne vous ennuierez pas en attendant l autobus : le m210 possède une multitude de jeux parmi lesquels vous pouvez choisir et lorsque vous serez sur la route. ce, directement dans la paume de votre main! " Obtenez des indications instantanées, trouvez des boutiques ou des restaurants de la région grâce à la carte interactive. Fonction mains libres Messagerie...

Momentus 4200 N-Lite
Momentus 4200 N-Lite
25/02/2012 - www.seagate.com
Momentus 4200 N-Lite ST940110A Momentus 4200 N-Lite ST940110A © 2004 Seagate Technology LLC All rights reserved Publication number: 100354613, Rev. A October 2004 Seagate and Seagate Technology are registered trademarks of Seagate Technology LLC. SeaBOARD, SeaFONE, SeaTDD, SeaTools, and the Wave logo are either registered trademarks or trademarks of Seagate Technology LLC. Other product names are registered trademarks or trademarks of their owners. Seagate reserves the right to change, without...

Huawei Uk Modern Slavery Statement 2023
Huawei Uk Modern Slavery Statement 2023
01/04/2025 - www-file.huawei.com
Modern Slavery Statement FY2023 AN INTRODUCTION TO HUAWEI: This statement is prepared for Huawei Technologies (UK) Co., Ltd. (hereinafter referred to as HWUK  and Company No. is 04295981) and Huawei Technologies Research & Development (UK) Limited (hereinafter referred to as UKRD  and Company No. is 07371283), both registered in United Kingdom (hereinafter referred to as UK ), and both are subsidiaries of Huawei Technologies Co., Ltd, a multinational technology corporation headquartered...

lien en PDF - Tôle perforée sur mesure
lien en PDF - Tôle perforée sur mesure
02/02/2017 - www.tole-perforee-sur-mesure.com
REPORTAGE CHANTIER 49 Façade en bardage métallique noir sur le quai à Issy-lesMoulineaux Le bâtiment en pierres anciennes dispose d un caractère architectural très fort. Son emplacement sur les quais et son histoire offrent un parfait emplacement pour un restaurant. Le choix de la perforation a été subtil car il faut à la fois tamiser la lumière, laisser transparaître légèrement la pierre tout en habillant le premier étage en tenant compte des fenêtres. Sous la tôle perforée se déroule...

Eclairage LED Toshiba pour la Joconde et les salles rouges au Louvre
Eclairage LED Toshiba pour la Joconde et les salles rouges au Louvre
23/06/2017 - www.toshiba.fr
Le 04 juin 2013, Toshiba et le musée du Louvre franchissent une nouvelle étape de leur partenariat en rénovant l'éclairage de la Joconde et des salles rouges avec des solutions LED Une cérémonie d'illumination a eu lieu le mardi 4 juin dans le hall Napoléon du musée du Louvre, afin de célébrer la fin de la rénovation de l éclairage de la Joconde et des salles rouges par des luminaires LED Toshiba. Cet événement s est déroulé en présence de M. Hidejiro Shimomitsu, Vice-président...

HYBRID E - Pentax
HYBRID E - Pentax
09/12/2014 - www.pentax.fr
LE SYSTEME HYBRIDE Code Art. Code EAN Noir & Noir K-01 boîtier nu K-01 + DA 40mm XS K-01 + DAL 18-55 K-01 + DAL 18-55 + DAL 50-200 LE PLUS COMPLET 15221 15241 15261 15273 0027075215306 0027075214583 0027075214699 0027075214804 15361 0027075215634 15301 15302 15303 15304 0027075216242 0027075216259 0027075216266 0027075216273 Noir & Jaune K-01 + DAL 18-55 Silver & Noir K-01 body only K-01 + DA 40mm XS K-01 + DAL 18-55 K-01 + DAL 18-55 + DAL 50-200