Volume control device

A volume control device for an amplifier and speaker system adapted for controlling the volume output level from the speaker while maintaining the input impedance of the device with the speaker coupled therewith, with constant impedance range near the actual speaker impedance or a predetermined impedance, said device comprising:

• input terminal means for receiving an output signal from the amplifier,
• first impedance means,
• means coupling the first impedance means in series with the speaker impedance across the input terminal means,
• second impedance means including variable impedance means manually settable to control volume output level from the speaker and having a variable impedance output node,
• means coupling the variable impedance means in parallel with at least the speaker,
• means coupling the variable impedance output node to a junction point between the first impedance means and the speaker impedance,
• and an ohmage selection switch having at least two positions, in one position switching an additional resistor in parallel with the first impedance means.

A volume control device for an amplifier and speaker system adapted for controlling the volume output level from the speaker while maintaining the input impedance of the device with the speaker coupled therewith, with constant impedance range near the actual speaker impedance or a predetermined impedance, said device comprising:

• input terminal means for receiving an output signal from the amplifier,
• first impedance means,
• means coupling the first impedance means in series with the speaker impedance across the input terminal means,
• second impedance means including variable impedance means manually settable to control volume output level from the speaker and having a variable impedance output node,
• means coupling the variable impedance means in parallel with at least the speaker,
• means coupling the variable impedance output node to a junction point between the first impedance means and the speaker impedance,
• said first impedance means, speaker impedance and second impedance means forming a ladder network with said second impedance means having complimentary variable impedance sections,
• wherein one of said impedance sections is in parallel with the first impedance means and the other impedance section is in parallel with the speaker.