Luxman
Ultimate High Fidelity Stereo Component Model R-1120 AM/FM Stereo
Tuner-Amplifier
The long
awaited advent of super-powered "tuner-amplifier" from Luxman
Giant power
output 120 W minimum continuous per channel into 8 ohms loads, 20-20,000 Hz
both channel driven with no more than 0,03% total harmonic distortion.
Truly useful
equally eye-catching LED peak indicators allow easy reading of instanteneous
output power level.
3 pairs of
speaker terminals, one of which is specially designed for exclusive use with
such low-impedance loudspeakers as electrostatic loudspeaker which have been
gaining remarkable popularity among discerning audiophiles.
Audio
Section
The pre-amp
section employs an equalizer amp composed of a 3-stage direct-coupled flat amp
of PNp and NPN transistors, a buffer circuit of NPN transistors, and a control
amp composed of a 2-stage direct-coupled circuit with PNP transistors.
Throughout the entire circuitry, specially selected low-noise transistors are
featured, and a constant voltage supply circuit at the power supply section
ensures stable performance. Special
circuitry is provided to obtain a large amount of gain at each stage, and the
large amounts of Negative feedback applied realize ultra low distortion and
wide bandwidth.
In the main
amp section, a differential amp features a low-noise pair of transistors of
uniform characteristics, which suppresses the DC drift to the minimum level. A
constant current drive system is arranged at the loads of pre-driver stage,
which not only improves the load condition in the treble but realizes stable,
undistorted power output.
To prevent
accidental failure, a power limiter circuit to protect power transistors from
excessive current, and a time-delay muting circuit to safeguard speaker system
from DC droft are incorporated.
An exclusive
terminal is provided for operation of such speakers as electrostatic ones which
have extreme, low impedance at the ultra bass range. Furthermore, the LED peak
indicator is provided with an on-off switch and its sensitivity is
interchangeable betwen 0 dB and -12 dB.
FM Section
Our
exclusive "Closed Loop Lock Tuning System" is featured not only to
reduce remarkably the amount of frequency drift at the local oscillator, but to
lock the receiving frequency accurately at the transmission frequency of an FM
station.
Unlike
conventional AFC circuitry, the frequency lock is limited to ±100 kHz to
prevent the receiving frequency from merging into that of the adjacent channel.
A superb 1,8
µV sensitivity is attained thanks to a quality 4-gang tuning capacitor at the
front end, which interacts with the dual gate MOS FET to, ensure good overload
and spurious characteristics,
Excellent
band pass response is obtained by means of linear phase ceramic and block
filters, which ae superb in group delay time characteristics and sharp skirt
selectivity. Good limiting and low distortion are attained by means of a
quadrature IC and distortion free discriminator transformer.
We employed
a specially selected PLL MPX IC to obtain stable operation and ultra low
distortion as well as good separation and Signal-to-Noise ratio. In addition, an exclusive IC low-pass filter
helps suppress carrier leakage. Moreover a constant voltage supply circuit is
used for stable performance. Dolbyized FM can be received with the insertion of
an optional Dolby circuit board.
AM Section
Pleasant
reception of AM broadcasting is ensured thanks to modern technology utilizing a
powerful AGC circuit, a ceramic filter of high selectivity, and distortion-free
detector, etc.
Specifications
Audio
Section
Power
Output: 120 watts minimum continuous per
channel both channels driven into 8 ohms load, from 20 to 20,000 Hz with no
more than 0,03% Total Harmonic Distortion
Rated
Intermodulation: no more than 0,03% (8
Ω, both channel driven, 60 Hz : 7 kHz = 4 : 1)
Frequency
Response: 15 Hz - 70 kHz (-1 dB)
Input
Sensitivity:
Phono 1, 2
: 2,6 mV
Aux, Tuner,
Monitor : 160 mV
Phono
Overload Voltage (at 1 kHz): 160 mV
Signal-to-Noise
Ratio:
Phono 1, 2
: 72 dB
Phono 1, 2
: 94 dB (IHF A weighted, 10 mV)
Aux, Tuner,
Monitor : 88 dB
Aux, Tuner,
Monitor : 95 dB (IHF A weighted)
Residual
Noise: no more than 1,3 mV
Crosstalk at
1 kHz: -73 dB (Aux, Monitor)
Tone Control
Treble
: 2 kHz, 10 kHz (±3 dB); 4 kHz, 10 kHz (±8 dB)
Bass : 200 Hz, 100 Hz (±6 dB); 400 Hz, 100 Hz, (±11 dB)
Filters:
Subsonic
: 15 Hz (-12 dB/oct)
Low Cut
: 70 Hz (-12 dB/oct)
High Cut
: 7 kHz (-12 dB/oct)
Loudness
Control (VR: -30 dB): 100 Hz (+10
dB); 10 kHz (+7 dB)
Peak
Indicators: 0, -6, -9, -12, -15, -18 dB
Additional
Features: Loudness Control, Peak
indicators, Speaker Switch, Headphone Jack, Tape Dubbing Switch, etc.
FM Section
IHF Usable
Sensitivity (at 98 MHz, 400 Hz, 100% mod.):
Mono : 10,3 dBf (1,8 µV)
Stereo
: 17,2 dBf (4,0 µV )
50 dB
Quieting Sensitvity (Selectivity at 98 MHz, 100 µV):
Mono : 14,1 dBf (2,8 µV)
Stereo
: 36,8 dBf (38 µV)
Frequency
Response at 98 MHz, 1 mV:
From 50 Hz
to 10 kHz [mono/stereo] : +0,2 -0,5 dB /
+0,2 - 1,5 dB
Distortion
at 65 dBf :
100 Hz
[mono/stereo] : - / 0,2%
1 kHz
[mono/stereo] : 0,1%/0,2%
6 kHz
[mono/stereo] : 0,3% / 0,4%
Capture
Ratio at 65 dBf: 1,3 dB
Image
Response ratio: 80 dB
IF Response
Ratio: 85 dB
AM
Suppression Ratio: 55 dB
Stereo
Separation [stereo]:
At 100 Hz
: 45 dB
At 1 kHz
: 48 dB
At 6 kHz
: 42 dB
Subcarrier
product Ratio: 60 dB
SCA
Rejection: 60 dB
Muting
Range: 50 kHz
AM Section
IHF Usable
Sensitivity at 1000 kHz, 400 Hz, 3-% mod.:
200 µV/m
Image Ratio
at 1000 kHz (external Antenna): 75 dB
IF Rejection
at 1000 Hz (external Antenna): 80 dB
Signal-to-Noise
Ratio at 1000 Hz, 10 mV, 400 Hz, 30% :
52 dB
Distorsion
at 1000 kHz, 10 mV, 400 Hz, 30% mod.:
0,5 %
Output Level
at 1000 kHz, 3 V/m, 400 Hz, 30% mod.:
0,15V
Selectivity
at 1000 kHz : 32 dB
General
Power
Supply/Consumption: 120 V 5,5 A (CSA
rated)/ 500 W (at full powee, 8-Ω)
Dimensions
(W x H x D): 490 x 415 x 180 "
(19-5/16" x 16-7/32" x
7-3/32")
Weight [net/gross):
17 kg (37.4) / 19 kgs [41,8 )
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