Marantz CDA-94
¥ 150,000 (released in 1986)
Commentary
The D/A converter was developed by combining technologies such as a 16-bit 4 x oversampling digital filter in order to respond to the full-scale development of digital audio.
The D/A converter uses TDA1541, a 16-bit 4-times oversampling L/R-independent 2 dac with sampling rates of 44.1 khz, 48 khz and 32 khz.
The circuit consists of a digital interface, D/A converter, and analog audio. The power supply is completely separated to eliminate interference and noise from each circuit. The digital and D/A circuits are equipped with an EI-type transformer, and the audio section is equipped with a toroidal-type transformer. A custom high-capacity electrolytic capacitor for audio is also installed.
The chassis uses an aluminum pull-out top cover that is integrally molded with the die-cast chassis and ribs to reduce external vibration.
Equipped with a PLL lock circuit that locks automatically according to input sampling frequencies of 32 khz, 44.1 khz and 48 khz.
Both optical and coaxial digital input jacks are available, and a digital monitor jack is also provided.
In addition to fixed and variable analog outputs, a balanced output is also provided.
Equipped with an absolute phase control, the phase of the analog output can be controlled by an inverting circuit.
Equipped with a headphone port with independent volume.
.JPG)
.JPG)
.JPG)
Model Rating
| Type | D/A converter |
| Sampling frequency | 32 kHz, 44.1 kHz, 48 kHz (automatic switching) |
| D/A converter | 16-bit 4 x oversampling digital filter L/R Independent 2 dac |
| Filter | Third order Bessel filter |
| Channel | 2 Channel |
| Frequency characteristic | Fixed, Vriable : 2 Hz ~ 20 kHz ± 0.1 dB (at 44.1 kHz input) Balance : 20 Hz to 20 kHz ± 0.3 dB |
| Dynamic range | 96 dB or more |
| Signal-to-noise ratio | 104dB(1kHz) |
| Channel separation | 100 dB or More (1 kHz) |
| Total harmonic distortion factor | 0.0015% (1 kHz, THD) |
| Digital input | Coaxial : 0.5Vp-p/75 Ω Optical : fiber connectors |
| Digital output | Digital Recording Output : 0.5Vp-p/75 Ω |
| Analog output | Fixed / Balanced : 2.5Vmax/600 Ω (XLR) Fixed / Unbalanced : 2.5Vmax/120 Ω (RCA) Variable / Unbalanced : 0 ~ 2.5Vmax/120 Ω (RCA) |
| Headphone out | 0 ~ 50mW/8 Ω |
| Pwer | 100 V, 50Hz/60Hz |
| Power consumption | 28W |
| Maximum external dimensions | Width 462x Height 104x Depth 368 mm |
| Weight | 9kg |