YAMAHA YP-B4
¥ 40,000 (around 1978)
Commentary
A record player that uses excellent parts for each point and also has an auto mechanism.
The drive system is a belt drive system. An aluminum die-cast turntable with a diameter of 30 cm and weight of 1.1 kg is driven by a 4-pole synchronous motor.
The turntable is precisely dynamically balanced from the molding stage, and is finished precisely with the turntable bearing and motor pulley which are the points of the drive system.
The tone arm adopts an S-shaped pipe arm with a precise lateral balance, and is held by a zinc die-cast holder with high rigidity and low squeal.
In addition, it is equipped with a direct-reading graduation-type inside force canceler, arm lifter, 0. 5-g step counter-ring-type needle pressure adjustment, etc. to improve usability.
The head shell is an EIA-standard plug-in type, and the output terminal is gold-plated to reduce contact failure. In addition, it uses a dynamic damping system that reduces the resonance of the arm by matching the resonance frequency due to the stiffness of the balance weight mass and rubber bush to the low-frequency resonance of around 10 Hz of the arm.
SHURE's M75BM MM-type cartridge is used.
Equipped with auto mechanisms such as auto lead-in, Oatley turn, auto cut, auto repeat, etc.
Uses a special semi-spherical rubber insulator.
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Model Rating
| Type | Record player |
| Motor | 4-pole synchronous motor |
| Drive system | Belt drive |
| Turntable | 30 cm aluminum die-cast, 1.1 kg |
| Wow flutter (WRMS) | Not more than 0.07% |
| Signal-to-noise ratio | 52 dB or more |
| Tone arm | S-shaped static balance arm |
| Weight range of the mounting cartridge | 4g ~ 11g |
| Anti-skater | Spring Cam Lever System / Direct Reading Type |
| Cartridge (YP-800 only) | MM Type Cartridge, SHURE M75EM |
| Exchange needle | N-75.6 (¥ 5,800) |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Rated power consumption | 9W |
| External dimensions | Width 435x Height 150x Depth 347 mm |
| Weight | 7kg |