ALLNIC AUDIO H-6500 Руководство пользователя - Страница 9
Просмотреть онлайн или скачать pdf Руководство пользователя для Усилитель ALLNIC AUDIO H-6500. ALLNIC AUDIO H-6500 16 страниц. Phono-stage preamplifier
Печатать страницу
OUTPUTS
D.
The H-6500 is equipped with one pair of single-ended (RCA) outputs (See Figure 2).
The right and left channel output connections are also aligned vertically under the
label "Output" just to the left of the DC Source Input (See Figure 2), with the left
channel output at the top and the right channel output connection at the bottom.
Facing the front of the phono-stage, the output connections are to the immediate
right of the power umbilical cord connection.
MOVING COIL (MC) TRANSFORMER CONTROLS
E.
On the top of the chassis, on the right if you are looking down facing the front of the
phono-stage, there are two pillars with rotary controls on the top. These are the MC step-
up transformer controls. There is a control for each channel (See Figure 5).
The "X#" scale corresponds to the factor that you will select closest to the millivolt output
of your selected MC cartridge. Each position on the X# scale corresponds to an increase
in gain, indicated on the +#dB scale. You should use identical settings for both
transformers to avoid channel imbalance.
A NOTE ON PHASE
F.
Phase issues generally will result in lack of bass and/or focus of the stereo image. You
may need to reverse connections on your cartridge if you are having phase issues. As is
usual in these circumstances, some trial-and-error experimentation may be required to
find the correct position. Of course, the entire process is simplified if your preamplifier
has a phase control, as do many of the Allnic Audio preamplifiers.
IMPEDANCE
G.
In the Specifications section near the end of this manual, you will read that the
moving coil (MC) input impedance for the H-6500 is up to 117 ohms. This value
represents the internal impedance of the cartridge itself and is at the extreme upper
end of what would be expected for the internal impedance of an MC cartridge. It
would be exceptionally unusual to find a cartridge with internal impedance greater
than that value. In fact, however, the MC step-up transformers in the H-6500 can
accept cartridges with up to 470 ohms internal impedance.
MM input impedance is set at 47kΩ.
9