Hi,
This is my second attempt at CD player measurements, based on the knowledge I gained from ASR. Many thanks to the members who contributed to developing this part of the reviews, especially @NTTY, who shared their measured files with me. Some of these files were used in this review.
The device under test is Marantz's CD player, model CD6006, which has been replaced by model CD6007. CD6006 costs around $600.
Measurements were conducted for both the analog and optical outputs (results for the optical and coaxial outputs were identical). The following results do not include measurements for the headphone output, which will be added to this thread later.
The measurements were conducted using the Audio Precision APx525 audio analyzer with the following settings:
Measurements
RMS Level
The output level is close to the 2V standard for unbalanced outputs.
Analago output (stimulus sine 999,91 Hz / -0,01 dBFS)
THD+N
Using a self-dithered sine wave at 999.91 Hz, measurements were provided with 16-bit resolution. Results for the analog output are very close to this level. Below are the results for the optical output for comparison.
Analago output (stimulus sine 999,91 Hz / -0,01 dBFS)
Optical output (stimulus sine 999,91 Hz / -0,01 dBFS)
Dynamic Range
Dynamic range measurements were conducted using a standard dithered tone at 997 Hz. The analog output is clouse to the theoretical file limit.
Analog output (stimulus sine 997 Hz / 0 dBFS)
Optical output (stimulus sine 997 Hz / 0 dBFS)
Frequency response
Frequency response measurements were performed using two stimuli: a sweep from 5 Hz to 20.05 kHz at -0.01 dBFS and a sweep from 20 Hz to 20 kHz at -0.01 dBFS. In both cases, the deviation was minimal, barely exceeding 0.05 dB.
Analog output:
Stimulus: sweep 5-20,05k Hz / -0,01 dBFS and sweep 20-20k Hz / -0,01 dBFS
Optical output:
Stimulus: sweep 5-20,05k Hz / -0,01 dBFS and sweep 20-20k Hz / -0,01 dBFS
FFT spectrum
For the analog output, the FFT of a 999.91 Hz tone shows that the first harmonics are above the -120 dB level. The optical output exhibits no such issues.
Analog output and Optical output
Stimulus: sine 999,91 Hz / 0,01 dBFS
Multitone
The multitone stimulus was dithered, which increased the noise floor. The analog output maintained a flat noise floor across the entire range, which is good, but a single distortion component is visible in the spectrum.
Analog output and Optical output
Stimulus: multitone 10-20k Hz | -10 dBFS | Decade 1/10 | Dither 16 Bits
Jitter
The green dotted line represents the file on the test CD and it is a reference. Anything projecting beyond it is distortion.
For simplicity, only Channel 1 is shown, as Channel 2 gave identical results.
Analog output
Stimulus: j-test tone
Intermodulation distortion
There is some issue in analog output. Optical out shows a reference.
Analog and optical
Stimulus: Dual tone 60 and 7kHz / 4:1 amplitude ratio
Crosstalk
For left and right analog channels.
Stimulus: sine 999,91 Hz / 0,01 dBFS
This is my second attempt at CD player measurements, based on the knowledge I gained from ASR. Many thanks to the members who contributed to developing this part of the reviews, especially @NTTY, who shared their measured files with me. Some of these files were used in this review.
The device under test is Marantz's CD player, model CD6006, which has been replaced by model CD6007. CD6006 costs around $600.
Measurements were conducted for both the analog and optical outputs (results for the optical and coaxial outputs were identical). The following results do not include measurements for the headphone output, which will be added to this thread later.
The measurements were conducted using the Audio Precision APx525 audio analyzer with the following settings:
Measurements
RMS Level
The output level is close to the 2V standard for unbalanced outputs.
Analago output (stimulus sine 999,91 Hz / -0,01 dBFS)
THD+N
Using a self-dithered sine wave at 999.91 Hz, measurements were provided with 16-bit resolution. Results for the analog output are very close to this level. Below are the results for the optical output for comparison.
Analago output (stimulus sine 999,91 Hz / -0,01 dBFS)
Optical output (stimulus sine 999,91 Hz / -0,01 dBFS)
Dynamic Range
Dynamic range measurements were conducted using a standard dithered tone at 997 Hz. The analog output is clouse to the theoretical file limit.
Analog output (stimulus sine 997 Hz / 0 dBFS)
Optical output (stimulus sine 997 Hz / 0 dBFS)
Frequency response
Frequency response measurements were performed using two stimuli: a sweep from 5 Hz to 20.05 kHz at -0.01 dBFS and a sweep from 20 Hz to 20 kHz at -0.01 dBFS. In both cases, the deviation was minimal, barely exceeding 0.05 dB.
Analog output:
Stimulus: sweep 5-20,05k Hz / -0,01 dBFS and sweep 20-20k Hz / -0,01 dBFS
Optical output:
Stimulus: sweep 5-20,05k Hz / -0,01 dBFS and sweep 20-20k Hz / -0,01 dBFS
FFT spectrum
For the analog output, the FFT of a 999.91 Hz tone shows that the first harmonics are above the -120 dB level. The optical output exhibits no such issues.
Analog output and Optical output
Stimulus: sine 999,91 Hz / 0,01 dBFS
Multitone
The multitone stimulus was dithered, which increased the noise floor. The analog output maintained a flat noise floor across the entire range, which is good, but a single distortion component is visible in the spectrum.
Analog output and Optical output
Stimulus: multitone 10-20k Hz | -10 dBFS | Decade 1/10 | Dither 16 Bits
Jitter
The green dotted line represents the file on the test CD and it is a reference. Anything projecting beyond it is distortion.
For simplicity, only Channel 1 is shown, as Channel 2 gave identical results.
Analog output
Stimulus: j-test tone
Intermodulation distortion
There is some issue in analog output. Optical out shows a reference.
Analog and optical
Stimulus: Dual tone 60 and 7kHz / 4:1 amplitude ratio
Crosstalk
For left and right analog channels.
Stimulus: sine 999,91 Hz / 0,01 dBFS
