What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.



H.H. Scott '59





Pioneer HPM-60

 Clearly Defined Image Projection from 60 watt. 4-way, 4-speaker Bass-reflex System with Carbon Fiber Blended Woofer and High Polymer Supertweeter.

When a speaker system as unusually well designed as the Pioneer HPM-60 goes to work, the meaning of musical "realism" is well beyond words. Pioneer's success with the unique woofer cone material called "Carbon Fiber Blend" is now well known throughout the high fidelity world, as is the Pioneer development of a High Polymer Supertweeter that ends narrow-beam tweeter directionality and assures a more natural, cleaner high-end reproduction. Both these remarkable innovations and more besides are included in the 4-way, 4-speaker HPM-60 system.
They contribute to very clearly defined sound image projection for the most realistic musical reproduction Pioneer's technical knowhow has yet achieved in such a compact, attractively priced system.

Special features, level Controls.
Individual controls are provided for the Mid and High frequency ranges, and when set at "0" a suggested output characteristic is obtained. Turning either control clockwise  increases the output from that speaker, while turning fully counter clockwise reduces the output to zero.
Specifications
Enclosure:  book-shelf style, Bass-reflex type
System:  4-speaker, 4-way
Loudspeakers:
Woofer :  250 mm (10") cone type, carbonfiber cone
Mid-range :  100 mm (4") cone type
Tweeter :  45 mm (1-3/4") cone type
Super tweeter :  High-polymer type
Nominal Impedance:  8 Ω
Frequency Range:  35 - 25,000 Hz
Sensitivity:  92,5 dB/1W/1m
Maximum Input Power:  60 W
Rated Input Power:  30 W
Crossover Frequency:  3,000 Hz, 4,000 Hz, 12,000 Hz
External Dimensions (W x H x D):  350 x 610 x 321 mm ( 13-25/32" x 24" x 12-5/8")
Weight:  17,5 kg (38 lb 8 oz)


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