ARREL Audio
R-501 ELITE User Manual, Issue 0.2
Page 5
INTRODUCTION
ARREL Audio R-501 Elite
Mic-Line Preamplifier has been conceived to offer to the 500
series user the superior audio performance of the ARREL audio higher level product lines.
The unit offers to the 500 user high reliability, rugged design, outstanding audio quality,
versatility and ease of use typical of the tradition of ARREL Audio products.
R-501 Elite
is
perfect for recording every kind of music from classic, pop/rock, electronic and in all the
situations (live and recording studio) where maximum sound quality and special attention
to dynamic range and signal to noise ratio is needed.
The
R-501 Elite
technical specification shows that it is the perfect audio unit also for actual
digital recording 24bit/192kHz environments where superior performance is required.
R-501 Elite
is based on the use of the latest circuit topologies, characterized by very low
distortion, ultra-low noise and very wide frequency response. The amplifier architecture is
based on two high dynamic range gain stages in order to avoid any saturation.
Even if the input stage of the
R-501 Elite
could accept input signals up to +24 dBu, a
special protection circuit limits the input level at +20 dBu in order to prevent any damage.
The
R-501 Elite
extended input dynamic range
avoids the necessity of the input pad
and the gain is controlled by a single large knob. The absence of the input pad means
better sonic performances. In fact the pad degrades sound quality and affects signal to
noise ratio.
The
R-501 Elite
contains a special circuit that allows the connection of microphones even
if the unit is turned on with the Phantom Power activated (in any case we do not
recommend this practice in order to protect your microphones).
The R-501 Elite differently from the traditional series 500 modules (powered at +/-16
VDC) is powered at the normal 500 series voltage but the power supply is internally
increased at +/-24 VDC pro32 dBu maximum output level.
The Line Input (unbalanced) is easily accessible from the front panel by a 1/4"' TRS jack,
the jack insertion excludes the mic input. If a balanced line is connected to the Line Input,
it will be automatically unbalanced (cold connected to ground).
The two bantam connectors on the front panel provide an insert point (push button) that is
extremely useful permitting the
“on the fly” connection of out-board units without accessing
the back panel.
To obtain an outstanding audio quality, no servo amplifiers are used in the
R-501 Elite
so
IT IS NOT POSSIBLE TO UNBALANCE THE LINE-OUT OF THE
R-501 Elite.
If you need an unbalanced connection for the line out
follow the indications shown in
APPENDIX A.
Four illuminated buttons are provided for Phantom Power, Phase inversion, LO-CUT
filtering and Insert control.
