Audio Database

Image of the Integra T-411
Commentary

This FM tuner incorporates various technologies such as the crystal lock system.

It adopts the X' tal Locked method which always fixes the IF frequency at 10.7 MHz using a crystal oscillator.
This eliminates the need for troublesome tuning meters and allows easy tuning to the minimum strain point. In addition, since the lock accuracy is high, the maximum strain point can be maintained for a long time.

A newly developed 1-block, 6-pole linear phase type IF filter is used in 3 blocks for a total of 18 poles to achieve high selectivity.

It uses an input signal intensity meter with a dB scale, and can directly read the intensity of 20 dB ~ 80 dB.

The front end uses a new type precision five series varicon and dual gate MOS FET to obtain high sensitivity and interference signal rejection capability.
The dial scale is a 200 kHz regular interval scale with a total travel distance of 250 mm.

The muting is a 2-stage switching type of Local and Distant, and a reed relay is also used.

A double-balanced demodulator is used in the MPX circuit to achieve good separation characteristics up to high frequencies.

3-stage direct connection output circuit of 2-power supply system is adopted.

Model Rating
Type FM tuner
Receiving frequency 76 MHz to 90 MHz
Sensitivity 1.6 μ V (IHF)
3 μ V (S/N50dB)
Image ratio 110dB(83MHz)
IF interference ratio 110dB(83MHz)
SN ratio (FM, IHF) 75dB
Two signal selectivity 85dB
AM suppression ratio 56dB
Capture ratio 1.5dB
Distortion factor mono:0.1%(1kHz)
stereo:0.2%(1kHz)
Stereo separation 46dB(1kHz)
40 dB (100 Hz to 10 kHz)
Frequency characteristic 20 Hz to 15 kHz, + 0 -1dB
External dimensions Width 490x Height 138x Depth 373 mm
Weight 11kg