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manual abstract
Our new Century7' is such a utility amplifier featuring 100 watts RMS {@ 4 ohms), the latest active equalization circuitry, and tremendous input dynamic range to enable its use with almost any instrument. This unit is an ideal bass or keyboard amplifier and, with the inclusion of our unique “SATURATION’“” effect, is also a truly exceptional 100 watt guitar amplifier. This Saturation effect produces the warm overload and sustain characterists of vacuum tube amplifiers and is intended primarily for guitar; however, many interesting and novel effects can be accomplished with bass and keyboard instruments. The Saturation effect is further enhanced by the ability of the Century to control this effect with an optional remote footswitch. Our equalization circuit features active "shelving" type high and low equalizers and our unique “PARAMID'“” equalizer for the vital midrange frequencies. Our Paramid circuit enables true boost or cut capability in the vital midrange as well as enabling shifting the center frequency over an extremely wide range. This unique active/parametric equalization circuit enables the Century to duplicate almost any tonality and, when combined with the tremendous dynamic capabilities and Saturation features of the preamp, the results are truly exceptional. We have included an “effects loop” consisting of a transient protected preamp out/power amp in system of jacks to enable utilization of the Century with external devices such as power amps, effects devices, etc. A post gain (master volume) has also been included to further enhance this unique amplifier’s capabilities. The 100 watt power amp of the Century utilizes four rugged T0-3 power devices bolted to a massive aluminum heatsink. Power is supplied from a large transformer utilizing a grain-oriented silicon steel core feeding large silicon rectifiers in a full bridge configuration. The dual 5,500 microfarad filter capacitors supply well-regulated d.c. and provide tremendous instantaneous dynamic power capability. Overall, the new Century is the utility amplifier. It has the unique features, gain, overload dynamics, equalization and “ruggedized” output to handle almost any musical instrument. Its conservative 100 watt rating does not actually convey its true dynamic music power capabilities. If your requirements are for a simple “no frills” professional amplifier in the 100 watt range, we are confident that the Century will fill your needs. WARNING: TO PREVENT ELECTRICAL SHOCK OR FIRE HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. READ ALL INSTRUCTIONS CAREFULLY AND RETAIN THIS GUIDE FOR FUTURE REFERENCE. FRONT PANEL INPUTS The new Century has been provided with two input jacks, each having different sensitivities and a unique arrangement allowing the gain of both jacks to be equalized when instruments are plugged into both jacks. The high gain jack (A) is the input normally used and has considerably more sensitivity and input impedance than the low gain jack (B). This low gain jack has been included to allow extension of the input dynamic range. If the output signal from your instrument is overloading (distorting) the high gain input, then the low gain input (-6 dB) should be used. GAIN BLOCK™ The Century has been designed utilizing our new “GAIN BLOCK'“” signal processing front end. The provision of three interacting controls allows complete and total control of the amp’s gain structure (dynamics), harmonic content, overload texture, and output level. Each of the three control functions must be understood and adequate experimentation time spent in order to fully utilize the potential of this unique and innovative new amp. PRE GAIN Our pre gain control (C) is similar to conventional volume controls in that it is the first level setting device in the system. Our input preamp circuitry utilizes variable negative feedback with the pre gain control as part of the active circuit. Utilization of this type circuitry enables an optimum combination of input dynamic range, input impedance, and low noise operation for any particular gain setting. Operation should present no problem since its action is conventional even though the associated circuitry is quite different from older, totally passive circuits. Please be aware that this control exhibits the professionally accepted logarithmic (audio) taper having approximately one-tenth of the gain achieved at the 12:00 o’clock position with the balance being obtained as the control is rotated clockwise. Many manufacturers utilize “linear” action controls that concentrate almost all of the gain in the first one-third of the control rotation. While this "linear operation" is “initially impressive,” it should be noted that having all the gain “up front” in the first one-third turn is misleading and significantly reduces the amount of control latitude available. “SATURATION1“” The “SATURATION1“” control (D) is the control element for setting the operating point for our new and uniqu...
Other models in this manual:Musical Instruments - The Century (1.98 mb)