Hi,
Here is my review of the Marantz CD6006 CD player. This series has been replaced by the CD6007 (which costs about $600).
It is a standard CD player with analog, digital and telephone outputs.
The manufacturer claims a dynamic range of 100 dB, which should meet the requirements for a standard CD resolution of 16 bits.
Measured Files
Since there is no inputs, I used Wav files burned on CD. As file I used 1 kHz sine and sweep (20Hz-20kHz) both with 16 bits resolution and 44,1 kHz sampling rate. The audio files were dithered which slightly lowered the resolution. Below is a reference measurement performed on an APx525.
Quick comparison
Let's start with a quick comparison of all outputs.
Measurements
Unfortunately, the CD6006 offers resolution of less than 15 bits, which is not enough for a CD. Even the digital output does not meet the requirements.
RMS level
Analog out slightly over 2 V, what accordance with typical RCA output.
Phones output: drives most headphones.
THD+N %
SINAD
ENOB
All outputs have a lower resolution than the CD standard.
Dynamic range
Dynamic range lower than declared by the manufacturer.
Frequency respons
Here are two measures of frequency response. The first is based on RMS level in the frequency domain and the second is a level relative to 1 kHz.
Analog
Unrelevant differences between channels around 0,01V. The Flatness of the frequency respons does not exceed 0,03 dB in the highest range.
Optical
Flat frequency response.
Phones:
Small differences between channel, around 0,04 V, with a 0,7 V drop at 20 kHz. Linearity drops to 0,2 dB at 20 khz (sorry for the bad framing of the graph).
Here is my review of the Marantz CD6006 CD player. This series has been replaced by the CD6007 (which costs about $600).
It is a standard CD player with analog, digital and telephone outputs.
The manufacturer claims a dynamic range of 100 dB, which should meet the requirements for a standard CD resolution of 16 bits.
Measured Files
Since there is no inputs, I used Wav files burned on CD. As file I used 1 kHz sine and sweep (20Hz-20kHz) both with 16 bits resolution and 44,1 kHz sampling rate. The audio files were dithered which slightly lowered the resolution. Below is a reference measurement performed on an APx525.
Quick comparison
Let's start with a quick comparison of all outputs.
Measurements
Unfortunately, the CD6006 offers resolution of less than 15 bits, which is not enough for a CD. Even the digital output does not meet the requirements.
RMS level
Analog out slightly over 2 V, what accordance with typical RCA output.
Phones output: drives most headphones.
THD+N %
SINAD
ENOB
All outputs have a lower resolution than the CD standard.
Dynamic range
Dynamic range lower than declared by the manufacturer.
Intermodulation distortion
Frequency respons
Here are two measures of frequency response. The first is based on RMS level in the frequency domain and the second is a level relative to 1 kHz.
Analog
Unrelevant differences between channels around 0,01V. The Flatness of the frequency respons does not exceed 0,03 dB in the highest range.
Optical
Flat frequency response.
Phones:
Small differences between channel, around 0,04 V, with a 0,7 V drop at 20 kHz. Linearity drops to 0,2 dB at 20 khz (sorry for the bad framing of the graph).
