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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





Celestion Ditton 121

 The Celestion Ditton 121 is bookshelf 2-way speaker systems from the 80's a 
large clean soundfrom a small cabinet.
1.Baffle edges contoured for excellent acoustic properties
2.Glass filled nylon clamp ring
3.Integral HF unit rear loading cnclosure
4.Barium ferrite magnet 1.0. Tesla
5.Pressure formed aluminium dome
6.Critically located damping elements
7.Baffle injection moulded from foamed styrene for strength and rigidity
8.Neoprene roll surround
9.Resistent protective grille formed from perforated rigid polystyrene sheet
10.Four layer voice coil
11.Barium ferrite magnet 0.7 tsla
12.Integral crossover and terminal housing module. Terminal posts connected directly to crossover board
13.Bonded acrylic fibre damping

14.High density particle board cabinet assembled with baffle integral
Specifications
Overall Frequency response:  60 Hz to 18 kHz (±6 dB)
Impedance: 8 Ω nominal
System Resonance: 75 Hz
System Q:  1.2
Sensitivity:  2.5 watts pink noise input produces 90 dB SPL at 1 metre in anechoic conditions
Crossover Frequency:  4 kHz
Power Handling: 
Max. Rated power 40 watts programme (without clipping)
Continuous Sine Wave voltage rating 9.0 V 20 Hz - 4 kHz ; 4,5 V 4 kHz - 20 kHz
Amplifier Requirements:  10 -40 watts
Finish:  Teak, Walnut, Black
Internal Volume:  18 litres
Dimensions (W x H x D):  265 x 395 x 226 mm

Weight:  6 kg each net
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