Decibel Hi Fi
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Decibel Hi Fi
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Current Category Most modern amplifiers do not have provision for a phono cartridge, so a separate phono preamplifier is necessary. And the phono preamps included in many older integrated amplifiers are fairly basic. You can achieve a worthwhile improvement in sound quality with a separate phono preamp. When you consider that the signal that the phono cartridge extracts from the groove has to be amplified many thousands of times before it gets to the speakers any improvement in the signal at the front end will be magnified greatly. Why do you need a phono preamplifier? (answer courtesy of Graham Slee) We find a bass frequency of 50Hz has a wavelength ( groove wiggle) of 0.1cm (1mm) at the peak recorded velocity of a vinyl LP (5cm/sec). With 50:50 spacing, you'd only get 40 revolutions, and at 33? RPM that's just 1 minute and 12 seconds! At 1kHz (middle of the band) the wiggle is 0.05mm - enough for 24 minutes, but at 10kHz, the wiggle is so small it would be swamped by the noise of the vinyl's polymorphic structure. The cure is to turn the bass down and the treble up while cutting the record master. So when you play a record you need a clever bit of electronics to change it back. That's the job of the Phono Stage. The more accurate in frequency and phase performance the phono stage is - the better the sound. Not forgetting that the phono stage must not add to the background noise already on the record. The best phono stages are: Fast (wide bandwidth); Quiet (low noise) and distortion should be inaudible. And that is not an easy task! Pro-Ject Phono Box MK II MM/MC Phono Pre-amplifier Good sound from sound technology • Phono MM/MC selection switch located at the rear of the unit • Metal case shields the electronics from vibrational and electromagnetic interference • Small size allows installation close to record player • Special low-noise ICs used • Optimal channel separation through dual-mono circuitry • Gold plated RCA connection sockets • Outboard power supply included • Available in black only. NO STOCK TILL FURTHER NOTICE Phono Preamp Cascode Equalisation System Esoteric Sound's - Surface Noise Reducer - eliminates or reduces the clicks, crackle and pops found on most types of phonograph records. Its circuit can identify and remove many clicks and pops found on Lp's and even 78's and other vintage records. It will cause minimum degradation to either audiophile or vintage records and is suitable for inclusion into advanced audiophile systems where phonograph records are used. While use of a graphic equalizer or "scratch filter" to remove ticks and scratches is somewhat effective, such filters reduce or eliminate the highs found on records. The Esoteric Surface Noise Reducer acts only on the click or pop without effecting program material. The Surface Noise Reducer is also very effective in reducing ignition noise from FM radio broadcasts. Easily installed thru the external tape monitor circuit or your preamplifier/receiver For reviews go to http://www.esotericsound.com/home.htm#d_magazine%20reviews The Rek-O-Kut De-Hisser is actually three products in one: a background hiss reducer, a left/right groove wall selector for mono records, and a low frequency noise filter (rumble filter). Easily installed thru the external tape monitor circuit or your preamplifier/receiver or via the SuperConnector. Pre-1955 records were recorded to different standard than now employed in RIAA equalized phono amplifiers. The Re-Equalizer compensates for this. Easily installed thru the external tape monitor circuit or your preamplifier/receiver or via the SuperConnector. For reviews go to http://www.esotericsound.com/home.htm#d_magazine%20reviews
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