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Receiver Yamaha CR-2020 AM/FM (1977-80)

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Un monstrulet, puiutul lui 3020, foarte fiabil, destept, bine construit si cu sunet precis. Fara probleme tehnice, aspect foarte bun pentru varsta. Made in Japan in anii de glorie. Detalii tehnice si povestea lui la descrierea produsului. 

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Specificatii

Interval de acordare: FM, MW

Putere de ieșire: 105 wați pe canal în 8Ω (stereo)

Răspuns în frecvență: 10Hz până la 100kHz

Distorsiune armonică totală: 0,05%

Factor de amortizare: 40

Sensibilitate de intrare: 0,05mV (MC), 2mV (MM), 120mV (DIN), 120mV (linie)

Raport semnal-zgomot: 95dB (mic), 100dB (MC), 85dB (MM)

Ieșire: 150mV (linie), 30mV (DIN), 0,775V (Pre-out)

Impedanță de sarcină a difuzorului: 4Ω (minim)

Semiconductori: 6 x IC, 3 x FET, 109 x tranzistoare, 58 x diode, 7 x zener diode

Dimensiuni: 540 x 167 x 415 mm

Greutate: 19,3 kg

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Probabil știți că Yamaha oferă unul dintre cele mai puternice și complete sisteme audio de acasă cu componente, cu distorsiune ultra-redusă, din lume. Este, de asemenea, unul dintre cele mai scumpe.

Dar, datorită performanței excelente a prețului CR-2020, beneficiați de multe dintre caracteristicile unice dezvoltate pentru audiofilul fără cheltuieli.

CR-2020 face parte dintr-o nouă serie de componente audio Yamaha create cu un singur scop cheie: să ofere un sunet natural fără distorsiuni în casa dvs., în condiții reale de ascultare.

Pentru a realiza acest obiectiv, a trebuit să creăm o metodă complet nouă de măsurare a performanței, Intervalul de Eliminare a Distorsiunii Zgomotului. Ce arată acesta? NDCR este un interval, întreaga gamă de puteri pentru care distorsiunea armonică totală și zgomotul sunt sub un anumit nivel.

Este necesar ca toate măsurătorile pertinente să fie efectuate în condiții reale de ascultare; prin toate circuitele de amplificare utilizate în ascultarea reală (de exemplu, intrarea Phono către ieșirea difuzorului) și la setările de control al volumului preferate pentru nivelurile normale de ascultare.

Până în prezent, distorsiunea a fost de obicei măsurată doar pentru o parte a circuitelor amplificatorului (amplificatorul principal, amplificatorul egalizatorului). Mai mult, această măsurare a fost de obicei efectuată la setarea volumului maxim. Însă componentele care funcționează bine la acest nivel prezintă adesea caracteristici remarcabil de inferioare ale semnalului la zgomot, distorsiunii și chiar răspunsului în frecvență la niveluri de ascultare realiste.

De aceea, intervalul de eliminare a distorsiunii zgomotului de la Yamaha este măsurat la o setare de volum de -20 dB, în loc de convenționalul 0 dB: performanțele pe care le vedeți reprezintă sunetul real de acasă pe care îl auziți, nu doar cifrele de pe bancul de testare. Intervalul NDCR real pentru CR-2020 este o realizare superbă în ceea ce privește performanța fără distorsiuni: 100 mW până la 100 W.

Tradus în ascultare acasă, gândiți-vă în felul următor: dacă setați controlul volumului pentru cea mai mare parte a ascultării normale, puterea medie a difuzoarelor dvs. va fi de 1-2 wați. Un pasaj pianissimo în acest caz va fi de aproximativ 100 mW. Deci, intervalul NDCR complet obținut de CR-2020 înseamnă o fidelitate superbă, pură în fiecare situație de ascultare imaginabilă.

Pentru noi, la Yamaha, NDCR este mai mult decât o simplă măsurare. Aceasta reflectă abordarea de design a tuturor produselor noastre muzicale. Deoarece acordăm o atenție deosebită sunetului lor în utilizarea reală, inginerii noștri au dezvoltat această metodă de evaluare pentru a ajuta la construirea aceluiași răspuns tonal pentru plăcerea audio acasă.

Poveste faina: https://classicreceivers.com/yamaha-cr-2020

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Receiver Yamaha CR-2020 AM/FM (1977-80)

Receiver Yamaha CR-2020 AM/FM (1977-80)

Un monstrulet, puiutul lui 3020, foarte fiabil, destept, bine construit si cu sunet precis. Fara probleme tehnice, aspect foarte bun pentru varsta. Made in Japan in anii de glorie. Detalii tehnice si povestea lui la descrierea produsului. 

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