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





JVC DD-5 cassette deck

Direct-Drive Cassette Deck

Direct-drive Pulse Servo motor

Newly-designed low-impedance SA head for recording/play

Two-colour digital fluorescent level meters - responsive peak reading meters

Two-motor full-logic tape transport

Super ANRS, ANRS/Dolby-B NR, Auto Rewind Play/Stop

 

JVC has not reserved our latest technological achievement - direct drive - for just our very top-of-the-line models. The DD-5 is a case in point, it uses the JVC-exclusive Pulse Servomotor and direct-drive tape transport for full reliability and wow/flutter of only 0,065 % (DIN 45 500) - one of the lowest figures ever achieved in a consumer cassette deck. Yet, one look at the DD-5 will show you many other features, like full-logic control with light-touch buttons, two-colour digital fluorescent level meters, and an SA head for metal-tape capability.

 

Direct-drive system features the JVC-designed and -manufactured Pulse Servo motor.

Unlike most cassette decks (and just about every other cassette deck in this price range), the DD-5 is endowed with a direct-drive motor for capstan drive. Eliminated are all the cams, belts, pulleys, etc., that can generate speed variations that are passed on to the tape. That's why the wow/flutter of of the DD-5 is amazingly only 0,065%. Our own top-of-the-line DD-9 is the only consumer deck in existence that can boast of a lower figure. But, direct-drive alone can't assure low wow and flutter; it look a special motor design to end cogging, our own Pulse Servo design.

 

Low-impedance SA head for improved performance

The new SA head, specially designed for the DD-5, features double the normal number of Sen-Alloy laminates (twelve in all) and 1,5 times thicker core wires. These are the features that afford the SA head its low impedance. It guarantees improved high-frequency performance since fewer addy currents are generated due to the finer laminates. Low-frequency distortion is reduced because of lower DC resistance.

 

Two-colour digital fluorescent level meters; Easy readability for optimum record levels.

Our fluorescent level meters are far more accurate and far more responsive than common mechanical VU meters.

 

Two-motor full-logic; Smooth operation with fingertip ease.

Like the finest decks available, the DD-5 has a two-motor transport that allows us to endow it with light-touch full-logic control so that function buttons may be operated in any order; there's no possibility of tape damage thanks to the logic system.

 

Lockable timer standby mechanism; for unattended recording

The DD-5 not only has a timer standby switch for unattended recording (or playing) but it also has an interlock that prevents the timer standby Rec mechanism from being switched an accidentally during power outage, to avoid inadvertent recording (or erasing)

 


Specifications

Frequency Response (At -20 VU)

Metal Tape :  30 - 16,000 Hz (±3 dB)

SA/Chrome Tape :  30 - 16,000 Hz (±3 dB)

Normal Tape :  30 - 15,000 Hz (±3 dB)

Signal-to-Noise Ratio :  60 dB (Metal Tape)

Wow and Flutter :  0,065% (DIN 45 500)

Crosstalk:  65 dB (1 kHz)

Channel Separation :  40 dB (1 kHz)

Total Harmonic Distortion

Total (0 VU, 1 kHz) :  1,0% (Metal Tape)

K3 (0 VU,  1k Hz) :  0,4 % (Metal Tape)

Heads:

Record/Playback :  Low-Impedance Sen-alloy Head

Erase :  Two-Gap Ferrite Head

Motors:

1 x Pulse Servo Motor

1 x DC Motor

Fast Forward/Rewind Time :  85 sec. C-60 cassette

Input Sensitivity/Impedance

Mic x 2 :  0,2 mV/600 - 10 k

Line In x 2 :  80 mV. 100 k

DIN :  0,1 mV/k

Output Level/Impedance

Line Out x 2 :  0 - 500 mV/ 5 k

DIN :  0 - 500 mV/ 5 k

Headphones :  0 - 0,6 mW / 8 - 1 k

Power Requirements:  120/ 220/ 240 V, 50/60 Hz

Power Consumption:  26 watts

Dimensions (W x H x D):  420 x 110 x 290 mm

Weight:  6,0 kg


 

Nessun commento:

Posta un commento