Audio Database

The pictorial image of Project D-1

Marantz Project D-1 * 500-set limited production
500,000yen(1998 release)

Description
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The digital analog converter developed combining the famous element "TDA1541AS2 (double crown)" of a multiple bit, and the newest circuitry technology

–ÁÎ of multiple bit DAC IC and Philips "TDA1541AS2" (double crown) are the real 16-bit dual DAC chips which guaranteed the 16-bit precision in the large temperature span. In order to demonstrate the potential which this high precision IC chip has to the maximum extent,The outstanding D-A conversion, such as realizing a balance operation in one chip, is realized by developing advanced original DSP and constituting 8fs digital filter, a demphasis, an invert circuitry, and new feature "scaling."

The I/V converter part and the balance amplifier part are constituted from a Non-NFB circuit, and the diving of the digital noise is prevented by banishing the feedback loop. Moreover, the sizable cut also of the internal transmit Jitter resulting from the RF property of a power-source part and supplying speed is carried out by adoption of the Non-NFB power supply with temperature compensation covering the audio frequency band at large.

The scaling controller which uses original DSP is carried so that an operation of a DA converter may become always proper.

The passive type of the sub- excellent in a phase response and transient response nature is used for an analog post light filter.

The power-source part has composition which combined the mass low-impedance coil power transformer of 250VA classes, high-speed 10A first recovery diode, and the low scaling-factor foil low-impedance chemicon that carried out parallel connection.

The gilding double-sided printed circuit of 135 microns of single-sided totals Copper-foil thickness is adopted as 35 microns of surface layers, the four-layers substrate of 70 microns of internal-layers Copper foil, and an analog / power supply system circuit substrate at the digital system circuit board.

The rigid structure vibration-proof chassis structure by the combination of the side panel, rear panel, and top panel using thickness aluminum is adopted very much with the 3.2mm thickness copper plating steel plate bottom chassis. Moreover, the leg has adopted the three-position shorted to ground by the weight insulator made from a sintered alloy.

A coaxial (BNC), light, three kinds of seven digital inputs of a balance, and a coaxial and the digital output of one light each are carried.
A digital output can be turned on and off.

The sampling frequency serves as 32kHz, 44.1kHz, and a 48kHz automatic switch.

Analog output carries the XLR balance output and the RCA imbalanced output of Normal (right phase)/invert (negative phase).

Rear
Internal
TDA1541AS2

Rating of a mode
Form Digital analog converter
Frequency characteristic 5Hz-15kHz}0.5dB (fs = 32kHz)
5Hz-20kHz}0.5dB (fs = 44.1kHz)
5Hz-22kHz}0.5dB (fs = 48kHz)
S/N ratio 100dB
Dynamic range 98dB or more
THD 0.005%(1kHz)
Channel separation 96dB(1kHz)
Digital input Coaxial: 0.5 Vp-p/75ohm
Optical:-19dBm
Balanced: Three to 7 Vp-p/110ohm
Digital output Coaxial: 0.5 Vp-p/75ohm
Optical:-19dBm
Analog output Unbalance: 2.5Vrms
Balance: 5.0Vrms
Power source AC100V, 50Hz/60Hz
Power consumption 38W
The maximum Dimensions Width 440x height 134x depth of 364mm
Weight 17.0kg