Denon TU-900 tuner

Digital Display Servo Locked FM Stereo Tuner

Features:

Precise station selection tuning is ensured as the tuner is provided with both a dial scale and a digital adops the auto servo lock touch tuning system, to gain high Signal-to-Noise Ratio and low Distortion.

IF amplifier stage combines low distortion (0,025% mono) high selectivity (90 dB or better) with a 2-system (wide, narrow) IF amplifier circuit and a double filter pilot canceller circuit.

Provided with a high sensitivity front-end with a linear frequency type 5-gang variable capacitor that suppress intermodulation distortion

The audio amplifier stage is of DC configuration and specifically designed for the purest amplification possible.

The MPX stage achieves low distortion through a pilot canceller circuit and improving the separation with a unique separate correction circuit. A 440 Hz oscillator offers convenient air check.

Incorporates 2-output circuit system for amp and deck etc.

 

Precise Tuning with Excellent Performance

The Denon TU-900 employs a "Precise Tuning" system, with tuning accuracy 10 times higher than conventional system. In addition, tuning is quicker and more precise thanks to the automatic touch sensitive servo lock tuning system that automatically disengages the servo locking circuit when the tuning knob is touched with the hand.

It's almost like magic.

Featuring both and easy-to-read analog dispay scale and a digital readout. It is equipped with an automatic servo-lock touch sensor system, making tuning easier and more accurate. And, for improved performance, it is constructed with a high-sensitivity front-end, a wide and narrow 2-band IF amplifier, a wide band detection circuit, and MPX circuit with a pilot signal canceller, a pure DC amplifier, and an array of other features that make possible a high Signal-to-Noise Ratio ratio of 88 dB , a low distortion factor of 0,025%, and superb separation of 60 dB.

 

Dual-Gate MOS FET and a 5-Gang Variable Capacitor

Denon didn't just improve the Signal-to-Noise Ratio , but went all the way to tackle the task of improving sensitivity to 1,7 µV (9,8 dBf). And, inter modulation distortion has been suppreeed by increasing the interference wave removal capacity, obtaining an image-spurious-IF interference wave ratio of more than 110 dB.

 

Specifications

Type:  Digital display FM Stereo Tuner

Receiving Range:  88 - 108 MHz

Usable Sensitivity:  1,7 µV (9,8 dBf)

Effective Selectivity (±400 kHz): 

Wide :  50 dB

Narrow :  90 dB

Signal-to-Noise Ratio;

Mono :  88 dB

Stereo :  85 dB

Total Harmonic Distortion

Monaural (100 % mod.) Wide / narrow :  0,025% / 0,1%

Stereo (90% mod.) Wide / Narrow :  0,035% / 0,3%

Capture Ratio:  1,0 dB

AM Suppression:  70 dB

Image Rejection:  90 dB

IF Rejection:  100 dB

Spurious Response:  90 dB

Frequency Response :  20 Hz - 15 kHz (+0,2 dB -1,5 dB)

Stereo Separation: 

Wide :  60 dB

Narrow :  45 dB

Muting Operation Level :  26 dB

Output Level (100% mod.): 

Deck :  0,6 V

Amp :  3,3 k Ω

Level Check Frequency:  440 Hz

Tuning Indicator:  by LED

Tuning Strength Indicator:  by 5 Leds

Antenna Terminals:  75 Ω , 300 Ω

Power Supply:  AC 120 V, 200V/220 V/ 240 V 50 Hz

Power Consumption:  14 W

Dimensions (W x H x D):  505 x 83 x 344 mm

Weight:  6,1 kg