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





Chartwell PM 100 loudspeakers


The Chartwell PM100 loudspeaker system is a breakthrough in compact loudspeaker design and is intended for use in situstions where space is at a premium, but musical accuracy must not be compromised.

Many small loudspeaker systems suffer from lack of deep bass response and their acoustic  output is unnaturally coloured in the mid-range, but Chartwell research engineers have developed a bass-reflex cabinet incorporating a ducted  port enabling natural reproduction of sound throughout the entire sudio spectrum down to 50 Hz and below, a frequency not always accomplished by speakers several times the size of the Chartwell PM 100.

A 25 mm soft-dome radiator HF unit and a new specially developed long-throw 165 mm bass/mid bextrene cone unit are combined with a 10 element crossover network. More than usual care has been taken in the crossover network design to ensure the input impedance of the system does not vary significantly over the audio frequency range. This reduces the demand on the driving amplifier which would be less liable to break into instability. All these factors ensure that the very high standard which has become the hallmark of Chartwell products is maintained.

Specifications
Drive Units: 
Bass/Mid :  165 Chartwell
High :  HD12-9D25 Son-Audax (modified)
Crossover Frequency:  3,000 Hz
Power handling:  40 watts RMS. Suitable for amplifiers rated up to 100 W on speech and music
Frequency Range:  50 Hz - 20 kHz ±3 dB
Nominal Impedance:  8 ohms
Cabinet Volume:  15 litres
Dimansions (W x H x D):  240 x 460 x 205 mm
Weight:  7,5 kg
Finish:  teak, Walnut, Rosewood, Black oak

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