JBL Stunning Vintage Audiophile Floorstanding SPEAKERS. ---------------------------------------------------- These speakers are very loud with wonderful quality sound. Unfortunately they have been in storage for some years and the rubbers for the two largest speakers are badly rotted. They are easily available though. Here is one supplier, there are others: https://www.repairyourspeakers.com/en/foam-rubber-surrounds/jbl/jbl-250ti-1x-foam-surround-for-repair-speaker/a-3503-10000017. The replacement pair of rubbers would cost 42.50 including postage but if you can find some in UK stock much cheaper. The cases are generally in good condition with a few chips to the veneer around the base and rear edges, as shown, but nothing bad. I will include cables as shown, (speaker cables 2x 10mtrs) but they do not form part of the sale as condition has not been checked. These speakers are very heavy. You will need a van and two people to collect them. ---------------------------------------------------- The flagship model of JBLs home speaker line is the 250Ti, a large four-way system that is described as a no compromise design, a characterization with which we would agree. The Ti in the name refers to the ribbed titanium diaphragm of the 1-inch dome tweeter, which is designed for an extended, smooth high-frequency response (up to 27,000 Hz on axis). The 250Ti supersedes the JBL L250, differing from it principally in the tweeter and upper-midrange drivers. The new drivers are also used in several other, smaller JBL systems in the Ti series. The 250Ti has a unique and instantly identifiable shape: an asymmetrical, truncated, rectangular pyramid with a slightly backward-sloping front panel. The shape is said to offer the optimum baffle width for each driver and thus to minimize diffraction effects and improve imaging. The speakers are sold in mirror-image pairs, to be used with the vertical sides toward each other and the sloping ones on the outside. The speakers should be free-standing, away from walls. The 250Tis four drivers are vertically aligned, from the 14-inch low-frequency driver in its own subenclosure at the bottom of the cabinet to the Ti tweeter at the top. The low-frequency driver crosses over to an 8-inch lower-midrange driver at 400 Hz. The next crossover, at 1,400 Hz, is to a 5-inch midrange cone. The final crossover, to the tweeter, takes place at 5,200 Hz. Each driver is acoustically isolated from the others (only the woofer system is ported, with the opening on the rear of the cabinet). The woofer and lower-midrange drivers appear to be conventional cone radiators, though with very heavy magnetic systems (about 18-1/2 and 6 pounds, respectively) and large-diameter voice coils edge-wound with flat, copper wire. Their cone material is described by JBL as Aquaplas, apparently a laminate of paper and plastic materials that feels unusually stiff and solid to the touch. The upper-midrange cone is polypropylene with a gray filler. Clearly, the titanium tweeter dome is the most striking feature of the speakers design. Titanium is extremely strong and light, but it is not easily fabricated by conventional techniques. JBL makes the domes, complete with stiffening ribs and a specially formed integral titanium surround, by swirling compressed nitrogen gas against a 25-micron (0.001-inch) film of titanium. The result is a remarkably light yet strong high-frequency dome radiator, which is driven by an aluminum voice coil in the field of a 2-pound magnetic structure. The outputs of the two midrange drivers can be individually reduced in two 1-dB steps, and the tweeter level can be reduced by 1, 2.5, or 4 dB. However, the adjustment process involves loosening screws and moving shorting links, a cumbersome procedure at best. We suspect that most people will settle for the factory settings (the tweeter at 1 dB, the other two at 0 dB). The input terminals are heavy-duty binding posts that are compatible with special audiophile cables and connectors. The visual appearance of the JBL 250Ti is as striking as its special design featuresprobably even more striking to most people. It is finished in Burmese teak, with rounded edges, that is hand rubbed and oiled on all visible surfaces (the rear panel is in flat black). A dark-brown cloth grille covers all the drivers except the tweeter. Six sturdy plastic snaps hold the grille about 3/4 inch away from the front panel to minimize diffraction effects. If the cones are not subject to damage from children or pets, the speakers may be operated with their grilles removed, exposing the fully finished front of the cabinet. The JBL 250Ti is 52 inches high, 22-1/2 inches wide, and 14-1/4 inches deep. Its weight is specified as 150 pounds. Although we did not weigh these speakers we can testify that one of them is beyond the capability of a single normal human being to lift General Manufacturer:JBL Model: 250 Ti Model range: Titanium-Series Type: Loudspeaker Years of manufacture: 1985 - 1990 Made in: USA Color: Teak Oiled (also available in Transparent Black Stain, Indian Rosewood, Macassar Ebony, White Oak) Front Panels: Fronts available in Brown, Blue, Black, Rust, Tan, Maroon. Dimensions: 1321 x 572 x 362 mm (H x W x D) Weight: 68 kg Original price: approx. 2,600 (RRP, pair) Technical data Type: 4-Way, 4 speakers, closed compact speaker. Chassis: Bass speaker: 360 mm cone (cellulose with Aquaplas coating). Coil diameter: 100 mm copper Coil depth: 19 mm Magnet weight: 8,5 kg Flux density: 1.2 Tesla (12,000 Gauss) Bass-midrange: 200 mm cone (cellulose with Aquaplas coating) Coil diameter: 50 mm copper magnet weight: 2.7 kg Flux density: 1.05 Tesla (10,500 Gauss) Midrange driver: 130 mm (polypropylene) Coil diameter: 22 mm copper Magnet weight: 0.74 kg Flux Density: 1.35 Tesla (13,500 Gauss) Tweeter Ring Radiator: 25 mm (Titanium) Coil diameter: 25 mm copper magnet weight: 0,9 kg Flux Density: 1.4 Tesla (14,000 Gauss) Maximum recommended amplifier power: 400 watts per channel Impedance: 8 ohms Frequency response: 30 Hz - 27 kHz Crossover frequencies: 400 Hz, 1.4 kHz, 5.2 kHz System sensitivity: 90 dB SPL, 1 W, 1 m Special Features Level switch for mid and high frequencies Detachable front