Search this site

Labels

4-channel ACCUPHASE ACOUSTIC ENERGY ADC ADCOM ADS ADVENT AIFAI AIWA AKAI AKG Alchemist ALIANTE ALLISON ALTEC LANSING AMPEX amplifier AMPLIFON ANCIENT AUDIO AR ARCAM ARISTON ARMONIA AUDIA AUDIO ACADEMY AUDIO ANALOGUE AUDIO DYNAMICS AUDIO INNOVATIONS AUDIO NOTE AUDIO RESEARCH AUDIO-TECHNICA AUDIOLAB Audiostatic AUGUSTA AVALON AVID AXIOM B-I-C Bang & Olufsen BASF BASSOCONTINUO Bell Belt-Drive BEVERIDGE BEYER-DYNAMIC BOSE BOSTON BOWERS-WILKINS BOZAK BRAUN BRIONVEGA BSR California Audio Labs CAMBRIDGE CANTON cartridge CARVER CASTLE CD Player CD Transport CEC CELESTION CEMARK Centrex CERWIN-VEGA CHARIO CHARTWELL CIZEK CLARION CONRAD-JOHNSON COPLAND CORAL CORAL ELECTRONIC CREEK CROWN CYBERNET CYRUS DAC DAHLQUIST DALI DAT DBX DECIBEL DENON DIAPASON direct-drive Ditton DOKORDER DOMA DUAL DYNACO DYNAUDIO DYNAVECTOR EISA ELAC ELECTRO-VOICE EMPIRE EMT EPI EPICURE EPOS ES Series ESB Esotec ESOTERIC ESS EUMIG FAIRCHILD FOSTEX GALACTRON GALE GARRARD GENELEC GENESIS GIUSSANI RESEARCH GOLDENOTE GOODMANS GRAAF GRUNDIG H.H. SCOTT HAFLER HARBETH HARMAN/KARDON headphones HEATHKIT HECO HIRTEL HITACHI HPM idler INDIANA LINE INFINITY italian JAMO JANSZEN JBL JEFF ROWLAND JENSEN JMLAB JVC KEF KENWOOD KLH KLIPSCH KOSS KRELL KYOCERA LAE Lafayette lathe LEAK LECTOR LENCO LESA linear LINN loudspeaker LOWTHER LUXMAN LYNGDORF MAGNEPLANAR MARANTZ MARK LEVINSON MARTEL MARTINLOGAN MARUNI MASH MAXELL MBL McIntosh McLAREN MERIDIAN MERITON MICRO SEIKI MICRO-ACOUSTICS MIRAGE MISSION MITSUBISHI MONITOR AUDIO MONRIO MORDAUNT-SHORT MUSICAL FIDELITY MYRYAD NAD NAGRA NAKAMICHI NHT NIKKO NORESCO NOVA ONKYO OPERA OPTONICA ORTOFON PANASONIC PARADIGM PATHOS PEARL PHASE LINEAR PHILIPS PICKERING pioneer POLK AUDIO Power-amplifier Pre-amplifier Pre-phono Pro-Ject PSB QUAD quadraphonic RADFORD RCF receiver Reel to Reel REK-O-KUT REVOX ROGERS ROKSAN ROTEL ROYD RUARK SACD SAE sansui SANYO SENNHEISER SHARP SHERWOOD SHURE SIARE SIGNET SME SOMA SONAB SONUS FABER SONY SOTA Soundcraftsmen SPECTRAL Spica STANTON STAX Stereo 8 STILE ITALIANO STRUSS SUGDEN SUPERSCOPE Synthesis TAC TAD TAMON TANDBERG tangential TANNOY TASCAM TDK TDL TEAC TECHNICS THE FISHER THIEL THORENS tonearm TOSHIBA TRANSCRIPTOR TRIO tuner turntable ULIX Uni-Q UNISON RESEARCH unitra UREI UTAH VANDERSTEEN VOCE DIVINA VPI WADIA WHARFEDALE XAVIAN YAMAHA ZENITH ZINGALI

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





Conrad-Johnson PV12 preamplifier

Vaccum Tube Pre-amplifer

The PV12 draws on two decades of research at Conrad-Johnson into the reproduction of recorded music. The result is a line-stage preamplifier with a remarkable ability to recreate the dynamics, textures, tonalities, and ambience of live musical performances. With the PV12, we believe that you will experience the excitement of discovery in hearing more from your favorite recordings than ever before.

The audio circuit of the PV12 uses six vacuum tubes of three different types: two 12AX7 (V1 and V2), one 5751 (V3) and three 12AU7 (V4, V5 and V6).

Absolute Phase

Musical notes are heard through the ear’s response to waves of alternating rise and fall of air pressure. Musical ransients are almost exclusively positive: that is, the initial effect is a rise in pressure. The ear is capable of distinguishing these positive transients from the musically unnatural alternative of a negative transient (an initial fall in air pressure).

In terms of your stereo system, these transients are created by your loudspeakers. If the speakers respond to musical transients by first moving out, they are creating a rise in pressure, and the system is said to be "phase correct". If they respond by moving in, they create a fall in pressure and the system is said to be phase inverting. Each component

in the stereo system either preserves the phase of the incoming signal, and is said to be phase correct or inverts the phase and is said to be phase inverting. It is unimportant whether an individual component is phase correct or phase inverting, as long as the system as a whole is phase correct. This will be the case if the number of phase inversions is

even (or zero).

 

 


Specifications

Gain:

Phono Stage :  49 dB

Line Stage :  16.5 dB

Output: Maximum 20 V

Phase:  Line stage inverts phase of all inputs.

Phono Overload:  in excess of 200 mV at 1 kHz

Response:  bandpass 2 Hz to more than 100 KHz

RIAA Equalization to ±  .25dB (20 Hz - 20 KHz)

Hum and Noise (2 0Hz - 20 kHz):

Phono : 78 dB below 10 mV input

Line Level - 98 dB below 2.5V output

Distortion (Line Stage): THD & IMD less than .25%

Ouput Impedance: less than 800 Ω 

Dimensions (W x H x D):  19" x3,315" x  14.375"

Weight: 16 lbs


 

No comments:
Labels: , ,
Subscribe to: Posts (Atom)