Accuphase E – 370

Planet Audio
Planet Audio
Planet Audio

E-370 je novi model za 2016 godinu. Koristi naprednu konstrukcijsku tehnologiju iz modela E-470 i predstavlja dodatno poboljšanu revolucionarnu AAVA tehnologiju. Dvostruko poboljšani damping factor, displej sa ocitovanjem izlazne jacine zvuka kao i mogućnost priključenja DAC 40 kartice sa USB ulazom ili AD-30 kartice sa gramofonskom MM/MC sekcijom. AAVA-II implementira visoko sofisticiranu surface mount tehnologiju kako bi se povećala gustoća pakovanja i dostigao viši nivo integracije. Izlazna sekcija je izrađena kao precizni instrumentacioni pojačivač, koji omogućava potpuno simetričan transfer signala.

Zajedno sa dodatno poboljšanom MCS+ topologijom i principom strujne negativne povratne sprege, ovo omogućava još bolje električne karakteristike. U izlaznom stupnju, tranzistori velike snage projektirani za audio primjenu, povezani su u paralelnoj push-pull konfiguraciji. Pretpojačivačka sekcija donosi tonske kontrole i kompletan komfor rukovanja kao i mogućnost ugradnje opcijskih modula za digitalne izvore zvuka i analogni gramofon.

Inheriting outstanding technology from the top-of-the-line E-600 and the high-power version E-470, the E-370 represents a full model change from the E-360.
At the heart of the preamplifier section is the same version of the AAVA volume control as found in the E-600, pushing the noise floor to an absolute minimum. The power amplifier block employs the latest instrumentation amplifier topology, enabling fully balanced signal transmission in all stages. This reliably shuts out external noise interference and ensures perfectly stable operation. As a result, overall S/N ratio has been improved by 3 dB.
Other impressive features include MOS-FET switches in place of relays for speaker protection, helping to ensure superb electrical characteristics and improve long-term reliability. The circuit topology of the output stage is designed for extremely low impedance, resulting in a damping factor of over 400, demonstrating excellent speaker drive capability.

Revolutionary AAVA volume control
Output stage with high power transistors in parallel push-pull configuration produces quality power: 100 watts x 2 into 8 ohms
Instrumentation amplifier principle for power amplifier block allows fully balanced signal transmission
Logic-control relays for shortest signal paths
Strong power supply with massive high-efficiency transformer and large filtering capacitors
POWER IN button allows separate use of preamplifier and power amplifier sections
Numeric indication of volume level

Continuous Average Output Power (both channels driven, 20-20,000 Hz) 140 watts per channel into 4 ohms120 watts per channel into 6 ohms100 watts per channel into 8 ohms
Total Harmonic Distortion (both channels driven, 20~20,000 Hz) 0.05% with 4 to 16-ohm load
Intermodulation Distortion 0.01%
Frequency Response (HIGH LEVEL INPUT/POWER INPUT) 20–20,000 Hz +0, –0.2 dB (for rated continuous average output)3–150,000 Hz +0, –3.0 dB (for 1 watt output)
Damping Factor 400 (with 8-ohm load, 50 Hz)
Input Sensitivity (For rated input / For 1 W output (EIA)), Input Impedance HIGH LEVEL INPUT: 142 mV, 14.2 mV, 20 kΩBALANCED INPUT: 142 mV, 14.2 mV, 40 kΩPOWER IN: 1.13 V, 113 mV, 20 kΩ
Output Voltage, Output Impedance PRE OUTPUT: 1.13 V, 50 ohms(at rated continuous average output)
Gain HIGH LEVEL INPUT -> PRE OUTPUT: 18 dBPOWER IN -> OUTPUT: 28 dB
Tone Controls (Turnover frequency and adjustment range) BASS: 300 Hz ±10 dB (50 Hz)TREBLE: 3 kHz ±10 dB (20 kHz)
Signal-to-Noise Ratio (at rated output / EIA S/N) HIGH LEVEL INPUT: 106 dB, 92 dBBALANCED INPUT: 91 dB, 92 dBPOWER IN: 121 dB, 98 dB
Load Impedance 4–16 ohms
Power Requirements AC 120 V/230 V 50/60 Hz(Voltage as indicated on rear panel)
Power Consumption 46 – 245 watts in accordance with IEC 60065
Maximum Dimensions W 465 mm, H 171 mm, D 422 mm
Mass 22.7 kg net, 29.0 kg in shipping carton