DENON DP-80
¥ 95,000 (around 1981)
Commentary
Direct drive type turntable with double structure turntable.
A double-structured turntable is used for the turntable.
Structurally, it consists of a high-cut filter that connects the upper and lower turntables with springs and dampers, and the lower part is fixed to the motor shaft, which shuts out extraneous vibrations such as acoustic feedback from speakers and prevents the cartridge from picking up vibrations other than music signals.
The DP-80 uses an aluminum die-cast turntable for both the upper and lower parts.
An outrotor 3-phase AC servo motor is used as the drive motor.
The servo mechanism uses DENON speed servomechanism with magnetic recording detection method. DENON quartz combined with quartz lock achieves excellent rotational accuracy.
DENON's magnetic recording detection method detects a pulse signal at 1000 revolutions per revolution from the outer circumference of the turntable (inside the rim) where the speed change is most noticeable.
As a result, the accuracy is several to ten times higher than that of the FG method, which is detected from the frequency generator directly connected to the motor, and excellent response is realized.
It employs a two way speed servo mechanism using a 2-in-1 magnetic head for detection.
This not only controls the rotational speed delay, but also enables quick response when the rotational speed is too high. In addition, when 45 rpm -33 1/3 rpm is changed, the rotational speed is immediately stabilized at the specified speed.
In addition, smooth electronic braking during stops is also realized.
It is possible to fine-tune the speed of approximately half tones.
Suitable for various separately sold cabinets such as DK 300.
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Model Rating
| Type | Turntable |
| Drive system | Bidirectional servo direct drive |
| Motor | Outrotor 3-phase AC servo motor |
| Speed control system | Speed servo and phase servo by frequency detection Speed servo only at Speed ADJ |
| Number of revolutions | 33 1/3, 45 rpm (adjustable by ± 6%) |
| Wow and flutter | 0.015% W. rms or less (DENON measurement method) 0.02% w. rms or less (JIS measurement method) |
| Rotational speed deviation | 0.002% or less |
| Signal-to-noise ratio | 80 dB or more (DIN-B) |
| Startup time | Within 1.2 Seconds (33 1/3rpm) |
| Load characteristic | 0% (Needle Pressure 250g Outer Circumference) |
| Voltage characteristic | 0% for 90 ~ 110 V |
| Brake | Electronic |
| Turntable | Aluminum Die Cast 30.8 cm (Both Upper and Lower Part) |
| Moment of inertia | 370 kg / cm2(including turntable seats) |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 8W |
| External dimensions | Diameter 376x Height 140 mm |
| Weight | Approximately 10 kg |
| Sold Separately | Cabinet DK-300 (¥ 55,000) Cabinet DK-2300 (¥ 70,000) Cabinet DK-110 (¥ 35,000) |