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Classic Vintage Celestion Ditton 15XR Speakers.
Matched pair with consecutive serial numbers: 178133 & 178134.
Full working order.
The cabinets are in good original cosmetic condition, slight fading and marking to top of cabinets – see photos
All of the drive units are in very good condition and operate as they should.
The grills are in excellent condition with no holes, scuffs or stains to the grill cloths and no broken fixing studs. Both badges are present.
Collection from Bristol preferred – please agree alternative arrangements prior to bidding.
Description:The completely new Ditton 15XR is a sophisticated bookshelf loudspeaker system using all new components but drawing on the valuable experience gained with the world renowed Ditton 15. The design of “compact” or bookshelf loudspeakers demands the solution of special problems if proper bass reproduction is to be obtained. With the introduction of the highly successful Ditton 15, Celestion perfected a principle now universally known as the ABR. This device has a rigid diaphragm with linear roll neoprene suspension. Its motional mass is precisely calculated and acoustically coupled within the hermetically sealed enclosure. When signals are applied to the main bass drive unit the tuning is such that the ABR is in phase through a frequency band in the region of 60 Hz down to 30 Hz. Bass frequencies are thus shared between the main and auxilliary diaphragms.
That the ABR confers substantial benefits particularly where the enclosure dimensions have been limited, as in the Ditton 15XR, has been endorsed repeatedly by the technical Press. In addition to extending bass response downwards, giving a more realistic musical balance, an intrinsic function of the ABR is to reduce the required excursion of the main bass unit, thereby further reducing harmonic and doppler distortion. Both power handling and efficiency are also improved, resulting in increased dynamic range and therefore greater musical realism.
The latest type HD 1000 tweeter designed and produced by Celestion to the highest standards,the frequency range of this unit is from 2,5 kHz to 28 kHz. The domed diaphragm ensures good dispersion and low distortion.Anechoic cellular foam wedge and lining absorbs unwanted acoustic energy within the enclosure and prevents the formation of standing waves which would be detrimental to the loudspeaker performance.
New NS8 (8″) bass midrange drive unit with specially plasticized fibre cone to prevent resonances whilst the neoprene roll front suspension and concentric rear suspension permits the 1-inch long coil the large movements essential for the correct reproduction of low bass notes, with minimal distortion. A powerful 51,000 Maxwells (11,000 Gauss) magnet system weighing 1,1 kg controls these excursions, and all the components are housed in a new pressed steel plated chassis.
Units mounted flush to eliminate diffraction effects and tunnel resonances; covered by acoustically transparent grille cloth for maximum presence.
ABR (Auxiliary Bass Radiator) New 8″ unit with front neoprene roll suspension and pressed steel plated chassis, developed to work in concert with the bass/midrange unit.
Specifications:
Power Ratings: Maximum Rated Power: 60 watts programme (without clipping)Continuous Sine Wave Voltage Rating 9,7 volts RMS max. 30 Hz – 2,6 kHz / 7,0 volts RMS max. 2,6 kHz – 20 kHzSensitivity: 5,1 watts pink noise input produces 90 dB SPL at one metre in anechoic conditionsAmplifier Requirements: 10 – 60 watts RMSFrequency response: Overall : 30 Hz – 2 kHzSpecific: 60 Hz – 20 kHz 4 dB; 45 Hz – 26 kHz +4 dB -10 dBImpedance: 8OHarmonic Distortion (at 90 dB SPL): 1,2% at 100 Hz / 0,69% at 400 Hz / 0,86% at 1 kHz / 0,46% at 4 kHz / 1,13% at 10 kHz / 0,91% at 15 kHzCrossover Frequencies: 2,4 kHzSystem Resonance: 35 kHzInternal Volume: 23 litresDimensions (H x W x D): 560 x 250 x 240 mm (22″ x 9-3/2″ x 9-1/2″)Finish: Teak
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Category: Sound and Vision:Home Audio and HiFi Separates:Speakers and Subwoofers
Location: Bristol