What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Pioneer PL-400

 Pioneer PL-400 fully Automatic  Quartz-Controlled Turntable
There are a lot of turntables you can buy for less than $200. Many  of them are fully-automatic. Some of them have Quartz Reference Systems. Others feature sophisticated suspension systems. Or have specially-designed motors to make sure the sound of your turntable doesn't interfere with the sound of music.
But at Pioneer, we believe, that if you're going to pay $200 for a turntable, you shouldn't just get one of these features. You should get all of them.
While other turntables with some of these advancements may look the same as the PL-400 on paper, they don't sound at all alike in your home. Because all these advancements act together to keep an imperfect environment, like your home, from getting in the way of perfect sound.
In your home, simply slamming a door can be more jarring to your turntable than it is to you.
 Pioneer's PL-400 has a sophisticated suspension system that isolates the paltter and tone arm from the rest of the turntable. Which means you can shake, rattle and roll a lot more with a lot less worry that your turntable is doing the same thing.
The PL-400 also has the world's thinnest direct drive motor. This ultra-thin motor does a lot more than give the PL-400 an ultra-sleek appearance. It keeps the turntable platter perfectly steady at all times. Thoough platter wobbling isn't a problem that can be easily seen on most turntables, it can be easily heard. It results in shifts of musical pitch.
Something the PL-400 is never bothered with.
What's more, the PL-400 also has Quartz control like that found in the finest  Swiss watches.
Which means you're guaranteed to get the maximum in rotational accuracy.
So if you want a turntable that sounds great, there's any number you can buy. But if you also want the price to sound great, there's only one.
The fully-automatic Poineer PL-400. we bring it back alieve.
Drive System:  Direct-drive
Motor:  Quartz PLL Hall motor
Turntable Platter:  310 mm ø, aluminum alloy die-cast
Moment of Inertia:  180 kg/cm² (including platter mat)
Speeds:  33 and 45 rpm
Wow & Flutter:  0,025% (WRMS)
Signal-to-Noise Ratio:  75 dB (DIN B)
Build-up Time:  Within 120° rotation at 33 rpm
Speed Deviation:  less than 0,002%
Speed Drift:  less than 0,00008%/h at 33
Less than 0,00003%/degree temp. Change at 33 rpm
Type:  Static-balance type, S-shaped pipe arm
Effective Arm length:  221 mm
Overhang:  15,5 mm
Usable Cartridge Weight:  4 g (min.) to 9 g (max)
Full auto-mechanism; Anti-skating force control; Stylus pressure direct-readout counterweight; Cueing device, Strobe light; Free stop hinges
ICs :  3
Transistors :  3
Diodes :  6
Hall Elements :  3
Power requirements:  AC 110/120 220/240 V 50/60 Hz
Power Consumption:  8 W (at 120 V)
Dimensions (W x H x D):  420 x 96 x 365 mm (16-1/2" x 3-3/16" x 14-3/8")
Weight:  6,5 kg (14 lb 5 oz)

PC-135 Specifications (only model PL-400X KU)
Type:  Induced magnet type
Stylus:  0,5 mil diamond (PN-135)
Output Voltage:  3 mV (1kHz, 50 mm/s peak velocity, LAT)
Tracking Force:  1,5 g to 2,3 g

Frequency Response:  10 to 25,000 Hz

Nessun commento:

Posta un commento