KENWOOD DM-7080
¥ 80,000 (released in 1995)
Commentary
An MD recorder that uses Kenwood's original D. R. I. V. E. system and DAC7.
In order to improve the reproducibility of small signals, a unique D. R. I. V. E. (Dynamic Resoruction Intensive Vector Enhacement) system has been adopted.
This technology uses the real-time processing of adaptive filter technology (a method that processes all music signals instantaneously) to improve micro-level reproducibility and responsiveness to impulsive sounds such as attack sounds.
It is installed between the 8 x oversampling & 20-bit digital filter and the 20-bit data input D/A converter. It consists of several low-pass filters (LPF1-n) with cutoff frequencies within different audible frequency bands. The delay devices (Do-Dn) adjust the amount of delay generated by these low-pass filters.
The data from the digital filter is distributed from the input terminal to each delay unit and then to each LPF, with all delay units and low-pass filters working at all times.
Next, the selector control circuit constantly detects the frequency component and level of the input data and detects the optimum output of the LPF.
This makes it possible to drive the D/A converter with 20-bit precision data in all situations.
The D/A converter is equipped with DAC7.
The A/D converter is equipped with an A/D converter with 1-bit 5th-noise shaving and 18-bit resolution.
To reduce jitter, which greatly affects the linearity of 1-bit D/A converters, an advanced high-precision master clock is incorporated.
This improves the purity of the master clock and improves the accuracy of D/A conversion by preventing the influence from the power line and ground line.
It is equipped with a title input function that allows you to enter katakana, English upper / lower case letters, and symbols by operating the multi-jog dial while checking on the 15-character x2-column display. It also has a title search function that allows you to quickly check the name of a song using the entered characters.
It is equipped with functions such as Quick Move, which allows you to move within a range of 40 songs while viewing the current order of songs, Track Move, which allows you to easily move one song, Track Divide, which allows you to split one song, Track Combine, which allows you to connect songs, and Erase, which allows you to delete songs.
Digital input / output terminal (optical / coaxial) and analog input / output terminal are mounted.
Large dot FL tube display
Auto / manual track record function, program mode, timer Rec & Play, auto disk loading, auto power on (when disk is inserted), etc. are possible.
Equipped with a 32-key remote control.
Model Rating
| Type | MD recorder |
| Reading system | Noncontact optical readout (semiconductor laser) |
| Recording system | Magnetic field modulation overwrite system |
| Number of revolutions | 400 rpm ~ 900 rpm (CLV) |
| Voice compression system | ATRAC(Adaptive Transform Acoustic Coding) |
| D/A Converter | |
| D/A conversion | 1 Bit (DAC-7) |
| Oversampling | 8fs(352.8kHz) |
| A/D Converter | |
| Method | 5th-order Δ Σ system |
| Sampling frequency | 44.1kHz |
| <Digital Audio Performance> | |
| Frequency characteristic | 4 Hz to 20 kHz ± 0.5 dB (EIAJ) |
| Signal-to-noise ratio | 105 dB or more (EIAJ) |
| Dynamic range | 96 dB or more (EIAJ) |
| Overall strain rate | 0.006% or Less (1 kHz, EIAJ) |
| Wow and flutter | Below the measurement limit |
| Input Sensitivity / Impedance | Line : 500mV/25k Ω |
| Output level / load impedance | Fixed Output : 2V/10k Ω or More Headphone : 24mW/32 Ω |
| Digital output | Coaxial : 0.5Vp-p/75 Ω Optical : -15dBm ~ -21dBm (emission wavelength 660 nm) |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Rated power consumption (Electrical Appliance and Material Control Law) | 22W |
| External dimensions | Width 440x Height 94x Depth 373 mm |
| Weight | 6.2kg |
| Attachment | Remote control |