{"product_id":"accuphase-t-11","title":"Accuphase T-11","description":"A synthesizer FM stereo tuner developed in pursuit of the ultimate grade as a tuner for music fans who are concerned with sound quality.  For tuning for channel selection, high-precision tuning is realized by a crystal oscillator, and there is almost no deviation due to time or temperature change, and it is locked at the point of minimum distortion and maximum sensitivity. Because of electronic tuning, modulation distortion and noise due to external vibration are hardly generated.  Equipped with a 16-station memory tuning function, it can be called up instantly by pressing a button. In this case, depending on the station, the radio wave is weak and it is necessary to turn on the filter or change the selectivity. However, it is possible to set a function that matches the radio wave condition of the station.  In addition to memory tuning, a pulse tuning manual tuner using a rotary knob is mounted. This system was developed especially for manual electronic tuning. Pulses are generated by radial slits attached to the shaft of a rotary knob, and the tuning frequency is controlled by counting these pulses.  In the front-end section, the input and amplifier stages are each composed of a double-tuned configuration, and the mixer for frequency conversion is a balloon FET balanced modulator using a differential-transformer to prevent interference due to Dainyu interference. In addition, it is equipped with a PIN diode attenuator to prevent interference and distortion in any region by operating the transmission tower as a variable attenuator for large excess input near the transmission tower.  The detector stage combines an original DGL detector with a specially selected group-delay flat IF filter to obtain excellent characteristics of stable and undistorted capture ratio. The DGL detection method focuses on the delay time of the output of a high-speed logic IC. Nineteen of these circuits are connected in series. The phase angle is delayed by 114 degrees so as to minimize distortion and obtain the best SN. The delayed signal and input signal are added to an exclusive OR circuit. The potential between the two signals is selected to open and close the circuit. The degree of compactness of the signal wave generated by modulation is digitally detected and an audio signal is extracted. The linear region of the delay circuit is as wide as ± 2.5 MHz. Moreover, since it is a non-adjustable circuit, stable and excellent linear differential gain characteristics can be obtained.Binaural microphones In addition, two sets of IF filters, Normal and Narrow, are used. When adjacent interference is intense, switching to Narrow enables sharp reception with an emphasis on selectivity.  The stereo demodulation section uses the synchronization pilot signal included in the input signal to lock the internal oscillation circuit with the PLL circuit to obtain an accurate 38 kHz switching signal. The T-11 uses a combination of a ceramic resonator and a variable positive and negative reactance circuit that can be controlled by the control voltage in the internal oscillation circuit of this PLL, so that accurate switching signals can be obtained in a narrower lock frequency range than before. This circuit realizes the non-adjustment of the stereo demodulation circuit and maintains the initial characteristics for a long period of time. In addition, the separation does not change due to changes in temperature or line voltage. Moreover, the lock frequency range is much narrower than the conventional one, so that the beat distortion at high frequencies is reduced.  It is equipped with the first balanced output circuit as a tuner to prevent deterioration of sound quality in the transmission system.  It is equipped with a meter that can check the input signal level and multipath with a changeover switch. When the meter indicator is within the range of the clear mark, multipath indicates that the radio wave of good quality is received with minimum multipath.  It is equipped with a noise filter to reduce the noise of weak stereo stations, a muting switch to remove inter-station noise, a mono switch to force monaural, and an output level control to adjust the volume to other program sources.  A dedicated remote control is included.  The design is unified with the power amplifier P-11, preamp C-11 and CD player DP-11.\n\nType Synthesizer FM tuner MonAural Characteristics Receiving frequency 76.1 mhz to 89.9 mhz Practical sensitivity 11dBf(IHF) S\/N 50 dB sensitivity 17dBf(IHF) Standing-wave ratio 1.5 S\/N (80 dBf input, A-correction) 90dB Total harmonic distortion factor (80 dBf input +\/- 75 kHz shift, Normal) 20Hz:0.02% 1kHz:0.02% 10kHz:0.02% IM distortion factor 0.01% (80 dBf input, +\/- 75 kHz shift) Frequency characteristic 10 Hz - 16000 Hz + 0 -1.0 dB Two signal selectivity (IHF)  Disturbance wave Normal Narrow 400kHz 70dB 100 dB or more 300kHz 30dB 100dB 200kHz 10dB 40dB Capture ratio 1.5dB RF intermodulation 80dB Spurious interference ratio 120dB Image ratio 100dB AM suppression ratio (65 dBf input) 80dB Subcarrier suppression ratio 70dB SCA interference ratio 80dB Output voltage (+\/- 75 kHz deviation) 1.0V Stereo Characteristics Sensitivity (IHF) S\/N 40dB:29dBf S\/N 50dB:37dBf S\/N (80 dBf input, A-correction) 85dB Total harmonic distortion factor (80 dBf input +\/- 75 kHz shift, Normal) 20Hz:0.04% 1kHz:0.04% 10kHz:0.04% IM distortion factor 0.03% (80 dBf input, +\/- 75 kHz shift) Frequency characteristic 10 Hz - 16000 Hz + 0 -1.0 dB Stereo separation factor 100Hz:50dB 1kHz:50dB 10kHz:40dB Stereo switching input voltage 20dBf \u003cgeneral\u003e Antenna 75 ohm unbalanced (with 300 ohm balanced converter) Tuning system Quartz synthesizer method 16-station random memory tuning Detection system DGL method Output impedance  Balanced (Balanced XLR type) : 200 ohm (100 ohm \/ 100 ohm) Unbalanced Fixed output : 200 ohm Controlled (variable output) : 1.25k ohm (maximum) Meter Signal strength, multi-path switching Semiconductor used Transistor : 15 FET : 5 pcs IC : 32 Diode : 36 units Pwer AC100V\/117V\/220V\/240V, 50Hz\/60Hz Power consumption 15W External dimensions Width 445x Height 95 (Including Legs) x Depth 325 mm Weight 9.3kg Attachment : Remote Commander RC-5 Remote control system Infrared pulse system Pwer DC3V Dry battery Use 2 pieces of SUM-3 type (IEC name R6) Maximum external dimensions 64 mm wide x 149 mm high x 18 mm deep Weight 145g (including dry batteries)\u003c\/general\u003e","brand":"Accuphase","offers":[{"title":"Default Title","offer_id":59370778689881,"sku":"2683","price":690.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1066\/5721\/8905\/files\/accuphase-t-11-1.jpg?v=1789119420","url":"https:\/\/wenwaudio.com\/products\/accuphase-t-11","provider":"W\u0026WAudio","version":"1.0","type":"link"}