Audio Database

Image of Integra 423
Commentary

AM / FM tuner with improved bandwidth and selectivity characteristics by using a 6-element mechanical filter.

In order to eliminate image interference and spurious interference, the front end (FET) of high-frequency 2-stage / 4-row variable capacitor specification and 4-stage limiter circuit (IF5-stage) including 3-stage differential limiter are adopted.

Model Rating
Type FM/AM Tuner
Receiving frequency FM : 76 MHz to 90 MHz
AM : 530 kHz to 1605 kHz
Sensitivity (IHF) FM : 1.7 μ V
AM : 20 μ V
Image ratio FM:85dB(83MHz)
AM:70dB(1MHz)
IF interference ratio FM:100dB(83MHz)
AM:70dB(1MHz)
Signal-to-noise ratio (FM-IHF) 70dB
ACA (2-signal selectivity) 75 dB or more
AM suppression ratio FM : 55 dB or more
Capture ratio FM : 1.5 dB or less
FM stereo distortion factor Not more than 0.5%
FM-ST separation 40 dB or More (400 Hz)
Frequency characteristic 20 Hz to 15000 Hz, + 0 -1dB
External dimensions Width 312x Height 136x Depth 345 mm
Weight 8kg