It doesn't uses IC. It is an amplifier of a simple circuit. Marks can be seen as a sign of use, but still it's in a good working condition. Inspection, maintenance and adjustment has been done. 1db 20Hz to 20kHz at any level up to 30W.
5db 5Hz to 100kHz at 1W. Rise Time: 1.5 micro-seconds at 1W. Power Response: ±1db 5Hz to 50KHz into 8ohms at 30W. Total Output (IHF): Typically, 96W. Distortion: Less than 0.3% from 0.01W.
Damping Factor: Greater than 200 at frequencies below 1kHz into 8ohms. Hum and Noise: 100db below 30Watts output (unweighted; 108db, or ½ billionth Watt). Slewing Rate: Typically 5 volts per micro-second.The "slewing rate" is the maximum value that the first derivative of the output may take on. Load Impedance: 4ohms or greater. Stable with all speaker loads. Stable with all caps less than 1 mfd and all cap if isolated by 1ohm. Input Sensitivity: Approximately 0.7V. Voltage Gain: 27db at 1kHz with level control fully CW. Output Source Impedance: 0.2ohms nominal.
7.5ohms thru headphone jack. Turn-On: Instantaneous, with no large thumps or program delays. Protection: Short, mis-match, and open circuit proof, the D-40 is also invulnerable to Radio Frequencies. Protection is provided by a fusing system in all main DC supplies, coupled to a limited-energy power supply. The supply is further protected by an AC line fuse.
Input overload protection is furnished by internal resistance at the inputs on the amplifiers. Power Supply: There are actually four power supplies (two per channel) providing complete isolation and stability. The D-40 also features a special compact low-external-field power transformer.Power Requirements: Operates from 50-60-400Hz AC with double primary for 120 volt or 240 volt AC ±15%. Draws 10watts or less idle, 120 watts at 60watts output into 8ohm loads.
Heat Sinking: The entire aluminum chassis is used as a heat sink. The result is more-than- adequate heat sinking with a minimum of bulk. Chassis: All aluminum for maximum heat conduction with a minimum of weight.
Controls: Independent level controls, power switch, and neon pilot light of front panel. Connectors: Inputs: one ¼ in. Weight: 8 pounds net weight.
Color: Black anodized chassis with bright anodized aluminum front panel. Rack width, 1³/" high, 7/" deep (from mounting surface). Semiconductor Complement (all silicon): 18 transistors, 14 diodes, and 4 zener diodes. Please inspect photos for condition reference.Thank you for visiting our listings. Although we update our 10,000 plus inventory every 24 hours. Some items may sell locally in between that time and we may need to cancel the order. We source from hundreds of different outlets from all over the country to bring you a large variety of good deals from Japan. It usually takes 25 days to arrive to our International distribution office and about 1 to 2 weeks to arrive to your country. User instructions are mostly written in Japanese.
Electronics voltage is 100V (+/- 10%) no problem for USA or Canada. Now, for countries with 220240V please use a step down transformer. Listing and template services provided by inkFrog. The item "Crown D-40 Solid State Amplifier Refurbished Serviced Unit Shipped from Japan" is in sale since Thursday, June 27, 2019.
This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps". The seller is "japantreasures" and is located in Tokyo. This item can be shipped worldwide.