Bellari VP549 Bruksanvisning
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VP549
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VP549 Phono Preamp
SPECIFICATIONS
I/ O Connectors: RCA, 1/8" TRS Stereo
Gain: 41.51 dB gain @ 1kHz at the "0" setting
31.64 dB of gain at the "-10" setting
45.66 dB of gain at the "+4" setting
Input Impedance: 47k ohms
Output Impedance: 32 ohms Headphone, 470 ohms RCA
Frequency Response: 3Hz to 36kHz
Equalization: RIAA +/- 1 dB, 14Hz to 23kHz
Rumble Filter: 20Hz
THD: .005% @ 1KHz
S/N Ratio: >94 dB unweighted
PWR: 15 VDC
Size: 5.5"w x 3.5"d x 1.25"h
Weight: .8 lbs
Indicator: 1 Power LED
Bellari is a division of Rolls Corporation
Salt Lake City, UT
4/18
The RIAA equalization curve was intended to operate as the
global industry standard for records since 1954. However, it
is almost impossible to say when the change actually took
place.
RIAA equalization is a form of pre-emphasis on recording
and de-emphasis on playback. A recording is made with the
low frequencies reduced and the high frequencies boosted,
and on playback the opposite occurs. The net result is a at
frequency response, but with attenuation of high frequency
noise such as hiss and clicks that arise from the recording
medium. Reducing the low frequencies also limits the ex-
cursions the cutter needs to make when cutting a groove.
Groove width is thus reduced, allowing more grooves to t
into a given surface area, permitting longer recording times.
This also reduces physical stresses on the stylus which
might otherwise cause distortion or groove damage during
playback.
A potential drawback of the system is that rumble from the
playback turntable's drive mechanism is amplied by the
low frequency boost that occurs on playback. Players must
therefore be designed to limit rumble, more so than if RIAA
equalization did not occur. Using a rumble lter to lter out
the subsonic frequencies many help mitigate the noise from
the turntable.
INPUT
OUTPUT
15 VDC
HEADPHONE/
LINE OUTPUT
+
-
VP549
MADE IN USA
www.rolls.com
Rumble
0
Produktspecifikationer
| Varumärke: | Bellari |
| Kategori: | Inte kategoriserad |
| Modell: | VP549 |
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