Kenwood KA7. 10. 0 Vintage Integrated amp Solid state. This is a classic vintage integrated amp. Excellent condition. Ive been using it occasionally to power my workbench speakers, but its total overkill and being wasted for background music. I have the original box and manual for it. Here are some specs and marketing information I found for it online. It could do with a mild cleaning deoxit of switches sometimes, one channel will not work on startup, and clicking through the selector knob will fix it. Best Kinesiology Program In California on this page. I did not want to open it, but if the buyer wants, I will do this. I just used it for 2 days to test it, although it had not been used for over a year prior to that. Vintage Stereo Receivers. Restored Classics. Ready to GO Fully Restored Certified by Qualified personnel with over 58 years combined experience Warranted. Vintage audio system collection. A fantastic collection of vintage audio systems from the early tabletop compact systems till the very successful separate components. Interactive Touch Panel Control with Full Graphic User Interface High performance Navigation System with easytouse interface Built in Garmin Navigation. If you intend to use it as a primary amp, I would recommend re capping it, as its over 3. Being a vintage unit, it is sold as it. Please do not purchase it unless you are ready to send paypal funds right away. I only accept paypal, and expect immediate payment. Kenwoods superior tonal quality is again demonstrated by the low distortion characteristic of the model KA 7. With its professional features, such as our exclusive DC power amplifier and independent dual power supplies and many circuitry innovations, the KA 7. DC power amplifier has very low distortion and excellent transient response. Separate power supplies for each channel reduce Dynamic Crosstalk distortion to negligible levels, providing purer sound quality. Total Harmonic Distortion is a very low 0,0. Hz audio range. Signal to noise ratio measures a high 8. B IHF A at the phono inputs. And theres a superior tone control sysytem, attenuator type volume control and two steps loudness control to let you contur the sound to match your room characteristics and individual needs. New DC Power Amplifier. The development of the DC power amplifier can be counted as one of our most significant engineering successes, because it provides an almost perfect linear frequency response that starts virtually from 0 Hz. What this means is that the signal amplified has effectively the same waveform as that at the input terminals. The amplifier maintains extremely low distortion right down to the ultra low frequency range. With excellent phase and transient characteristics the response in actual conditions of musical reproduction the sound that you hear is perfectly natural. The direct coupled amplifer consist of a three stage differential circuit with a dual gate FET in the first stage and our power amplifier circuitry, assuring ample, highly stable, effective power output. To safeguard all circuit, and your precious speakers, theres a built in limiter protection circuit and protection relays. With phase and transient distortion both at negligible levels, the KA 7. Kenwood Stereo Control Amplifier Manual' title='Kenwood Stereo Control Amplifier Manual' />Direct Coupled, FET Equalizer Section. The high signal to noise ratio of 8. B at the phono inputs is the result of a carefully designed three stage ICL input capacitorless circuit, using FETs in the first stage. This provides good phase and transient response. Kenwood Stereo Control Amplifier Manual' title='Kenwood Stereo Control Amplifier Manual' />The class A amplifier with constant current output provides low distortion signal reproduction throughout the audible range. Tracking of the RIAA curve is so accurate, in fact that deviation from it is never more than 0,2 d. B. The max. phono input level,by the way is an unusually high 2. V, so theres no danger of overloading when youre playing passages of exceptional dynamic range. Independent Dual Power Supplies For Right and Left Channels. One of the drawbacks of conventional amplifiers is that a single power supply creates Dynamic Crosstalk distortion a form of distortion discovered by Kenwood engineers. Kenwood Stereo Control Amplifier Manual' title='Kenwood Stereo Control Amplifier Manual' />Dynamic Crosstalk has been largely overlooked in normal laboratory measuring methods which do not reveal the dynamic distortion in an amplifier appearing in conditions of actual musical reproduction. The power transformer has a large EI core and two separate windings, and there are four 6,0. F electrolytic capacitors. As well as this, a full scale voltage regulator using transistors is employed in the pre amplifier stage to prevent any interference between amplifier stages. By significantly reducing Dynamic Crosstalk distortion, there is a great improvement in transient response and damping. This allows each musical instrument to be heard in its correct location in the stereo sound field, and at its natural level. Reproduced sound, right down to the 1st octave is wonderfully crisp and clear. Sophisticated Tone Controls Make You Master of Your Sound. Tonal purity gets top priority at Kenwood and many of our design innovations and improvements have been transparent, distortion free sound possible. The tone control system of the KA 7. Baxandall type low distortion negative feedback tone circuits are employed to give both precision and stability. Attenuation is made in 1,5 d. B click stop steps over a maximum range of 7,5 d. B. An inportant feature is that the tone defeat completely bypasses the control section in order to maintain excellent tonal quality. Unique Tape Through Circuitry. JPG' alt='Kenwood Stereo Control Amplifier Manual' title='Kenwood Stereo Control Amplifier Manual' />Kenwoods now familiar tape through circuit allows you to listen to a completely different source while recording or dubbing. You can record simultaneously on one or two tape decks, and monitor both tape inputs, and you can dub from A to B. Two stage Loudness Control. The loudness control boosts the lower frequencies which would otherwise roll off when the volume is turned down vrey low. B at 1. 00 Hz and Position 2 boosts by 6 d. B at 1. 00 Hz at 3. B volume level. This gives a more natural, balenced sound when you are listening at low level. High Frequency and Subsonic Filters. High frequency noises, record scratch etc, can be cut by a high filter which cuts off at 8 k. Hz. Similarly, record warp there are more warped records than you think or other subsonic influences, which could affect your speakers, can be eliminated by a subsonic filter which has a cut off point of 2. Hz. Both have characteristic slopes of 6 d. Boct. Specifications. Power Amplifier Section. Both Channels Driven 2 x 6. Hz 2 x. 80 watts, 4 ohms at 1 k. Hz. Dynamic Power Distortion 2. Total harmonic Distortion 0. Intermodulation Distortion 6. Hz 7 k. Hz 4 1. Power Bandwidth 5 Hz to 4. Hz. Frequency Response DC to 1. Hz 0 d. B, 1,5 d. B. Signal to Noise Ratio 1. B short circuited. Damping Factor 5. Speaker impedance from 4 to 1. Preamplifier Section. Input SensitivityImpedamce. Phono 2,5 m. V5. Tuner, Tape, Aux 1. V5. 0 kohms. Signal to Noise Ratio IHF. A. Phono 8. 0 d. B for 2,5 m. V, 8. B for 5,0 m. V, 9. B for 1. 0 m. V input. Tuner, AUX, Tape 1. B for 1. 50 m. V input. The Rise Of Modern China Epub To Mobi. Maximum input Level for Phono 1 2. V RMS, THD 0,0. Hz. Output LevelImpedance. Tape REC PIN 1. V4. Tape REC DIN 3. V8. Frequency Response. Phono RIAA standard curve 0,2 d. B, 0,2 d. B. AUX, Tape 1. Hz to 1. 00,0. 00 h. Z 0 d. B, 1. 8 d. B. Bass 7. 5 d. B at 5. Hz. Treble 7. B at 1. Hz. Loudness Control at 3. B Volume Level at 1. Hz 1 3 d. B, 2 6 d. B, 3. Subsonic Filter 2. Hz, 6d. Boct. High Filter 8 k. Hz, 6 d. Boct. Power Requirements 5. Hz 1. 20 2. 40 V. Power Consumption 4. A. C. Outlet Switched 2, Unswitched 1. Dimensions W x H x D 4. Weight 1. 1,5 kg 1.