Audio Database Marantz Model 1152 99,800yen(around the 1977 time) Description �@ DC stream-composition Integrated Amplifier of the Low TIM design which outputted low a little by excluding a peek indicator from Model 1180. The low-noise transistor selected carefully specially is used for an equalizer amplifier, and it has become it with 3 steps of 5Tr stream-compositions first rank differentials hardwired-connection differential circuitry of difference input amplifier, buffer amplifier, and first class amplifier with a constant current load intensity. Here, a numeric value as high as 40dB of a closed loop gain is a thing since model 7, and if it is high MC cartridge of an output partly, it is also possible to use it direct. It has the try tone control original with a Marantz possible to a control of a Mid range. It is the linear slide system control which makes a graphic equalizer consider, and is effective in a correction of a special NetWare program, or a treatment of a room acoustic. Bass and Treble change �}10dB and Mid changes the frequency characteristic in a span of �}6dB. Furthermore, Bass and Turnover to which the performance characteristic of Treble can be moved are also equipped. The loudness contour that the optimal Fletcher-Munson curve in each stage at the time of a small sound volume can be set up by a succession variable is carried. Fine adjustment and the setting of low-pass and the amount of corrections of a high region can be carried out independently, and, moreover, a master volume can cut an it1 to ten steps. Since a circuitry is completely separated with the tick mark 0, the frequency characteristic becomes flat. It excels in the power linearity of the overall by pure complimentary OCL and a parallel push-pull circuit. Moreover, the outstanding phase response and transmission capability which are crossed to a wide band with DC stream composition have been acquired. The ESP protection network is carried, an excessive input is restricted to a safe value, and the protection which does not spoil musicality is performed. The bessel type filter which was excellent in the roll-off characteristics is adopted, 9kHz and the roll-off curve in which 18 dB/oct is steep at 15Hz are realized, and phase distortion is reduced. The tone circuitry was jumped and the tone defeat which sets the frequency characteristic as a flat is equipped. The DC/AC amplifier circuit changing switch is carried. Wooden cabinets are options. Rating of a mode Form Stereo Integrated Amplifier Output power (20Hz - 20kHz, both channel drive) 80W+80W (8ohms) 100W+100W (4ohms) Frequency characteristic (20Hz - 20kHz) + 0, -0.2dB THD 0.03% Cross modulation distortion 0.03% Dumping factor 60 Input sensitivity/impedance Main-amplifier input: 1.5V/30kohm Phone man-month: 1.8mV/47kohm Mic: 1.8mV/47kohm High: 180mV/25kohm An Output power/impedance Pre Out: 1.5V/200 ohm RIAA deflection (20Hz - 20kHz) �}0.2dB Input equivalent noise 0.32 microvolt (a phone and IHF-A) Dynamic range (phone) 119dB Tone control property bass(100Hz): �}10dB mid(700Hz): �}6dB treble(10kHz): �}10dB Filter Low: 15Hz, 18dB / oct High: 9kHz, 18dB / oct Power consumption 190W (Electrical Appliance and Material Control Law) Power source 100V, 50Hz/60Hz Dimensions Width 416x height 146x depth of 316mm Weight 14kg Option Standard walnut cabinet WC-110 (7,000yen) Standard mahogany cabinet WC-110N (12,000yen)