Luxman 1120 - Luxman R-1120 Technical Sections and Specifications; Audio, FM, and AM Section Descriptions; Detailed Performance Specifications

»udio Section
The pre amp section employs an ‘eadalizer amp
composed of a 3-stage direct-coupled circuit of
PNP transistors, a 2-stage direct-coupled flat amp
of PNP and NPN transistors, a buffer circuit of
NPN transistors, and a controi amp composed of
# 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
suoply section ensures stable performance.
Special circuitry is provided to gbtain 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,
venich not only improves the load condition in
tne treble range 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 drift are
s:ncorporated.
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 wsitch and its sensitivity is
interchangeable between OdB and — 12dB.
=M Section
Our exclusive ‘Closed Loop Lock Tuning System”
Mode Selector Switch 5
Tape Dubbing Switch— |
Tape Selector Switch > |
Tape Monitor “a |
FM Muting eon)
: |
! |
a |
| Dolby Indicator —
FM Stereo Indicator |
~Signal Strength Meter
“Tone Control
Input Selector —
ee Knob
“FM Fine Tuning Meter
‘Loudness Switch
‘Subsonic Filter
Low Cut Filter
ih Cut Filter”
r Selector Switch
For Peak Indicator Sensitivity
Stand-by Lamp
Power Switch
Dial Scate
Headphone Jack
“Speaker Selector Switch
. “LED Peak [Indicator
—Volume/Balance Control
Untike conventional AFC circuitry, the frequency
lock is limited to +100K Hz to prevent the
receiving frequency from merging into that of the
adjacent channel. |
A superb 1.8uV 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,
transformer. _
We employed a specially selected PLL MPX ick
obtain stable operation and ultra low distortion
as well as good separation and S/N ratio.
in addiiton, an exclusive IC low-pass filter helps
suppress carrier leakage. Moreover a constant
voltage supply circuit is used for stable
performance. Dolby:zed FM can be received with
the insertion of an optional Dolby circuit board.
AM Section
2 er
ee Ne PR ap i pg te tts Lede skate
Pleasant reception of AM broadcasting is ensured
thanks to modern technology utilizing a powerful
AGC circuit, a ceramic filter of high setectivity,
and distortion-free detector, etc.
which are superb in group delay time characteri-
stics and sharp skirt selectivity. Good limiting and
low distortion are attained by means of a
quadrature §C and distortion-free discriminator
is featured not only to reduce remarkably the
amount of frequency drift at the locai oscillator,
but to lock the receiving frequency accurately at
the transmission frequency of an FM station.
pointe meiainae——n i RE rl
al
A
LL
[AUDIO SECTION]
/ Power Output: 120 watts mintmum continuous per 50dB Quieting Sensitivity: 14.1dBf (2.8) 36.8dBf {38uV)
channel both channels driven into Selectivity at 98MHz, 100uV
8 ohms toad, from 20Hz to 20,000Hz +400k Hz: 80dB
with no more than 0.03% total 74dB 70d8
harmonic
distorsion.,
Frequercy
Response
at
98MHz,
Rated 1.M.: no more than 0.03% (8 ohms, both ImV: 50Hz — 10kHz +0.2, —0.5dB +0.2, —1.5dB
; ; ch driven, 6OHz : 7kKHz = 4: 1) 20Hz — 15kHz +0.2, -1.5dB +0.2, —1.5dB
Frequency Response: 15Hz — 7OkHz (—1dB Distortion at 65dBf: 100Hz 0.2%
input Sensitivity: 2.6mV {phono-1/2), 160mV (tuner, 1kHz 0.1% 0.2% o
aux, moni.) 6kHz 0.3% 0.4% \
Phono
Overload
Voitage:
160mV
-.
Capture
Ratio
at
65dBf:
dB,
{at 1kHz) Image Response Ratio: 80dB
Signal
to
Noise
Ratio:
72dB
(phono-1/2)
IF
Response
Ratio:
85dB
94dB (phono-1/2,)HF A weighted,10mV) AM Suppression Ratio: 55dB
88dB
(tuner,
aux,
monitor)
Stereo
Seapration:
100Hz
-
45dB
95dB
(tuner,
aux,
monitor,
[HF
kHz
=
48dB
A weighted) 6kHz — 42dB
Residual Noise: no more than 1.3mV Subcarrier Product Ratio: — ; 50dB
Crosstalk at ¥kHz: —73dB (aux, monitor) SCA Rejection: _ 60dB
Tone Control: TREBLE 2kHz, 10kHz (=13dB) Muting Range: 50kHz
4kHz, 10kHz (+8dB}
BASS
200Hz,
100Hz
(+6dB)
JAMSECTION)
400Hz, 100Hz (+11dB) eee oN AR Ee oe mods se °
Filters:
Subsonic
15Hz
(—12dB/oct.)
FE
eee
ee
eOk
ue
EXTANT
Se
Low Cut 70Hz {—12dB/oct.) Se ae Oe a A 80dB
High Cut Ik Hz (—12dB/oct.) S/N at 1000kHz, 10mV, 400Hz, 30% mod.: 52dB
Loudness Contro! (VR:—30dB): 10 5 Hz #10dB.—OCS~S —— yeu. Distorsion at 1000kHz, 10mV, 400Hz, 30% mod.: 0.5%
10kHz +7dB ‘Output Level at 1000kHz, 3mV/m, 400Hz, 30% mod. 0.15V.
Peak
Indicators:
0,
—6,
—9,
—12,
-15,
—18dB
Selectivity
at
10OQOkHz:
dB
dditio : j
A nai Features Loudness Control, Peak Indicators, [GENERAL]
Speaker Switch, Headphone Jack,
Tape
Dubbing
Switch,
etc.
Power
Consumption:
500W (at full power, 8-ohm)
120V 5.5A (CSA rated)
490(W) x 415(D) x 180(H)mm
19-5/16" x 16-7/32" x 7-3/32"
Weight: Ner 17kgs (37.4 Ibs)
Gross 19kgs {41.8 Ibs) .
[FM SECTION] Dimensions:
fmono] [stereo]
IHF usable sensitivity at 98MHz
400Hz, 100% mod.: 10.3dBf {(1.8uV) 17.2dBf (4.0uV)
eda) eng: appearance Besa) are subject to change without notice.
mith 4 CORPORATION, i
1-CHOME, SHINSENRI-NISHIMACHI, TOYONAKA- SHI, OSAKA, JAPAN. PHONE: 06-834-2222 CABLE: LUXELECT OSAnA TELEX: J63694