Loudspeaker system

A loudspeaker system comprising,

• means including woofer means defining [a substantially fluid-tight] an enclosure,
• said woofer means being for radiating acoustical energy to the front directly into the listening area having spectral components at least in the low range of audio frequencies below a predetermined crossover frequency,
• first and second like upper frequency driver means with means for attenuating rear radiation therefrom supported upon but outside said enclosure and having their axes pointing toward opposite sidewards directions for radiating acoustical energy having spectral components in the upper range of audio frequencies above said predetermined crossover frequency toward opposite sides of said enclosure,
• the region to the side of each of said upper frequency driver means being substantially completely acoustically transparent,
• said first and second upper frequency driver means being connected together for cophasally radiating substantially the same signal,
• an input terminal pair for receiving an audio electrical signal,
• and crossover network means for coupling energy from said input terminal pair with spectral components below and above said predetermined crossover frequency to said woofer means and the connected-together upper frequency driver means respectively while substantially blocking spectral components below said predetermined crossover frequency from the latter driver means including means for coupling to said first and second like upper frequency driver means more energy as a function of frequency to establish the on-axis pressure response thereof increasing with increasing frequency to coact with said woofer means to establish for said loudspeaker system a radiated power response as a function of frequency when normally positioned in a room that approaches uniformity more nearly than if said on-axis response were substantially uniform.

A loudspeaker system comprising,

• cabinet means for supporting loudspeaker drivers and having a front panel perpendicular to side panels,
• first loudspeaker driver means supported by said cabinet on said front panel for radiating sound energy to the front directly into the listening area before reflection from a reflecting surface over a first frequency range and having a first polar response,
• second loudspeaker driver means supported by said cabinet for radiating sound energy to the side for reflection first from a reflecting surface and then into the listening area along a path after reflection that intersects a plane perpendicular to said front panel and parallel to said side panels in said listening area over a second frequency range mostly higher than said first frequency range and having a second polar response different from said first polar response,
• the axis of said second loudspeaker driver means being generally parallel to a normally vertical plane that bisects the angle between said front and side panels,
• an input terminal pair,
• and means for intercoupling said input terminal pair and said first and second loudspeaker driver means for providing spectral components in a common frequency range to said first and second loudspeaker driver means so that the difference between the frequency response of energy radiated by said first loudspeaker driver means and the frequency response of energy radiated by said second loudspeaker driver means in said common frequency range is not appreciable,
• said means for intercoupling coacting with said first and second loudspeaker driver means to comprise means for dissimilarly radiating from first and second locations defined by said first and second loudspeaker driver means respectively spectral components over said common frequency range to provide a spatially diffuse source,
• said common frequency range being at least half an octave.

A loudspeaker system comprising,

• means including front and side panels with woofer means seated in said front panel for defining an enclosure,
• said woofer means being for radiating acoustical energy to the front directly into the listening area before reflection from a reflecting surface having spectral components at least in the low range of audio frequency below a predetermined crossover frequency,
• at least one upper frequency driver means having its axis pointing in a sideward direction at an angle to the axis of said woofer means for radiating acoustical energy first upon a reflecting surface and then into the listening area along a path after reflection that intersects a plane perpendicular to said front panel and parallel to said side panels in said listening area having spectral components in the upper range of audio frequencies above said predetermined crossover frequency to the side of said enclosure,
• an input terminal pair for receiving an audio electrical signal,
• and crossover network means for coupling energy from said input terminal pair with spectral components below and above said predetermined crossover frequency to said woofer means and to said upper frequency driver means respectively while substantially blocking spectral components below said predetermined crossover frequency from the latter driver means including means for coupling to said upper frequency driver means more energy as a function of frequency to establish the on-axis pressure response thereof increasing with increasing frequency to coact with said woofer means to establish for said loudspeaker system a radiated power response as a function of frequency when normally positioned in a room that is substantially uniform over nearly the entire range of audible frequencies.