TEAC D-T1
¥ 80,000 (around 1994)
Commentary
D/A converter equipped with bit stream conversion DAC7.
The D/A converter is equipped with a bit stream conversion DAC7 that theoretically eliminates 0 cross distortion.
In the D-T1, the SAA 7350, which has excellent signal characteristics, is placed on the left and right sides, and the TDA1547 "DAC7" is joined to both channels. This completes the double differential mode, which improves sound purity and transparency. This differential circuit cancels interference between the left and right sides and even order harmonics, and also improves the S/N ratio.
The digital audio interface receiver uses a high-end jitter-resistant device, and the digital filter includes an 18-bit 8 x oversampling digital filter.
The front panel is made of 5 mm thick solid aluminum, the main chassis is plated with copper to eliminate unnecessary electrical interference, and the double top plate structure with cushioning material realizes robust construction.
In addition, the power supply unit is equipped with an independent sub-chassis that is fixed separately to prevent vibration and resonance of the power supply unit.
Specially selected audio-only capacitors are used in both the digital and analog sections. In addition, an operational amplifier equivalent to that of high-end equipment is also installed. In addition, a high-precision metal-coated resistor used in precision measuring equipment is used on the entire surface. This resistor has a temperature characteristic of less than 50 ppm / ℃ and a tolerance of less than ± 1%.
Equipped with a preset switch that can set the coaxial / optical input in advance.
The sampling frequency is 32 kHz, 44.1 kHz and 48 kHz.
Uses a very thick power cord with polarity display.
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Model Rating
| Type | D/A converter |
| Number of audio channels | 2 Channel |
| Frequency Response (RCA) | 32 kHz : 1 Hz to 15 kHz ± 0.3 dB 44.1 kHz : 1 Hz to 20 kHz ± 0.3 dB 48 kHz : 1 Hz to 22 kHz ± 0.3 dB |
| Signal-to-noise ratio (EIAJ) | 110 dB or more |
| Dynamic Range (EIAJ) | 100 dB or more |
| Harmonic distortion factor (EIAJ) | Not more than 0.002% |
| Channel Separation (EIAJ) | 107 dB or more |
| Analog output | RCA : 2.2Vrms/47k Ω |
| Digital input | Coaxial : 2 systems, 0.5Vp-p/75 Ω Optical : 2 systems, -15dBm to -21dBm |
| D/A converter | Bit stream |
| Digital filter | 8 x oversampling 18-bit digital filter |
| Analog filter | Third order Butterworth filter |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 12W |
| External dimensions | Width 442x Height 104x Depth 331 mm |
| Weight | 7.2kg |