Audio Database

Image of Integra A-815RXII
Commentary

This is a real-phase <digital> amplifier that verifies the effect of digital signals on the amplifier and takes full-scale measures for digital signals.

The Real Phase <Digital> amplifier uses two in-phase transformers, an input in-phase transformer and a power in-phase transformer, to prevent external noise from entering the amplifier circuit.
In addition, a charge noise filter is used to eliminate normal mode noise that is superimposed on home AC lines and enters by microwave ovens and other high-frequency equipment.

The input-in-phase transformer prevents common-mode noise from the ground line of the other device when connected to the amplifier. This transformer is connected between hot and ground in the input circuit and eliminates noise without affecting the music signal.
The power-in-phase transformer eliminates common-mode noise from the AC line and cancels the noise that enters the amplifier circuit from the secondary side of the power transformer. The power-in-phase transformer also cancels the phase shift signal that occurs when a speaker is connected, and helps improve the phase characteristics of the amplifier.

The tone control circuit uses a volume circuit instead of a tone amplifier, and uses a direct tone system composed only of passive elements with little degradation in sound quality.
In addition to the general bass and treble, it is equipped with a contrabus that boosts the band below 100 hz. It can boost only the very low band while suppressing the influence of vocals and other sounds on the mid-range.

Uses a double sensing servo system that controls both + - ends of the speaker.

Model Rating
Type Stereo pre-main amplifier
Rated output (20 Hz to 20 kHz
Aux → sp out, both channels driven)
90W + 90W (6 Ω)
80W + 80W (8 Ω)
Total harmonic distortion rate (20 Hz to 20 kHz) Aux → sp out : 0.005% (8 Ω at rated output)
Phono MM → rec out : 0.004% (3 V)
Phono MC → rec out : 0.02% (3 v)
Intermodulation distortion factor (20 Hz to 20 kHz) Aux → sp out : 0.004% (at rated output)
Powerbandwidth 5 Hz to 100 kHz (IHF-3dB, THD 0.2%, 8 Ω)
Damping factor 100 (1 kHz, 8 Ω)
Frequency characteristic Phono → rec out (RIAA deviation) : 20 Hz to 20 kHz ± 0.2 dB
Aux → sp out : 2 Hz to 100 kHz + 0 -3dB
Input Sensitivity / Impedance Phono MM : 2.5mV/47k Ω
Phono MC : 180 μ V/220 Ω
CD, tuner, aux, tape play : 150mV/47k Ω
Video, VCR play (audio) : 150mV/47k Ω
Video, VCR play (video) : 1Vp-p/75 Ω
Phono maximum allowable input
(1kHz/10kHz, 0.05%)
phono MM:210mV/1000mV
phono MC:15mV/75mV
Rated output voltage / impedance Tape rec1, 2 : 150mV/560 Ω
VCRrec (voice) : 150mV/560 Ω
Pre out : 1V/600 Ω
VCR rec, video mon out : 150mV/560 Ω
S/N ratio (IHF-A filter input short) phono MM:86dB
phono MC:70dB
CD, tuner, aux, tape play : 100 dB
Video, VCR play (audio) : 100 dB
Tone Control (Vol-16dB) Bass : + / - 10 dB
Treble : + / - 8 dB
Loudness +7dB(100Hz)
Muting -20dB
Pwer 100 VAC, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law standard) 150W
AC outlet Unswitched : 1 line, 200W
Switched : 2 systems, total 200W
External dimensions Width 435x Height 144x Depth 385 mm
Weight 10.5kg