These are the vintage Speakers you can not and should not live without. please come demo they are just going to go up in price pick up only if possible cash they would have to be shipped freight + $ foam replaced 3 years ago ready to rock ,jazz or what ever I also have a mint McIntosh mc240 no pitting or rust I will be putting on sold
Specifications: Maximum Power Input' 60 watts continuous s,ne wave Nominal Impedance 8 ohms Power output2 97dB SPLmeasured at30m (loft) I" a room volume of 57 m3 (2000 cu ft) with % rated power inout (-3 dB) Frequency Response Sine Wave, On-AXIS %-Octave Band (400 Hz Reference) 35 to 20,000 Hz, f3 dB -5 dB at 31 5 Hz +2 dB at 6.3 kHz 0 dB at 20 kHz Polar Response No less than -3 dB at 80" horizontal and 60" vertical to 16 kHr 89 dB SPL measured at 1 m (3 3 ft) with al-watt Input averaged from 100 to 1000 Hz 40 dB SPL measured at 9 1 m (30 ft) with a l-mllllwatt Inputaveraged from 100 to 1000 Hz DIstortIon % Power, 95 dB SPL/3.0 m (10 ft.), Single Freauency 0 5% orlessthlrd harmorw Qeneratlon from 35 to 20,000 Hz Crossover Frequency 400. 2000 and 8000 Hz Flnlsh Textured orav or oiled walnut Grille Black fabric with the arav finish: Dark Blue fabric wthwainut Enclosure Volume Low Frequency Chamber Midrange Chamber 91 litres 3.2 cu it 2.8 litres 0.1 cu ft Enclosure Dimensions 854mmx521mmx327mm 33% I" x 20% I" x 12x I" Net Weiaht 43 ka 95 lb ShlDDlnq Welaht 49 ka 107 lb ' Power amplifier headroom recommendation is 3 dB minimum, i.e.. for a Wwatt rating use a 120~watt amplifier. 2Power output measured with a B&K Impulse Precision Sound Level Meter. 3Unlike many "theater type" loudspeaker systems that exhibit sensitivity peaks in the midrange region, the 4315 provides substantially the same sensitivity through the full range of audible frequencies. Measured sensitivity below 5W Hz or above 2wO Hz may be considerably greater than that of other systems with higher sensitivity ratings. JBL Professional Products are not intended for household use.
Accurate, smooth reproduction from 35 to 20,000 Hz, f 3dB. 40 dB SPL at 30 feet with a l-milliwatt input. 95 dB SPL al 10 feet at onehalf rated power input. Components: la-inch low frequency loudspeaker &inch midrange loud.speakeT S-inch high frequency loudspeaker and ultra-high frequency transducer Balance controls located behind the removable grille. Oiled walnut or textured gray enclosure. The 4315 Studio Monitor
The 4315, a compact studio monitor, is an extension of the research and development that produced JBL's latest high powered and most accurate monitors. The 4315 accurately reproduces the full range of musical fundamentals and overtones at sound pressure levels approaching those of the larger JBL systems The 4315 is characterized by exceptionally smooth, wide-band reproduction, clarity, transient response and a controlled dispersion pattern. Its performance is obtained through total integration of the components that make up its four-way system. Each transducer reproduces only that portion of the audio spectrum for which it is specifically designed, resulting in greatest utilization of each driver's frequency response, transient capability and dispersion characteristics. The effect is a true monitor system, compact in physical size, whose sound distribution pattern is such that the operator can be located relatively close to the enclosure. The la-inch low frequency loudspeaker features solid bass reproduction, smooth response well beyond its crossover frequency and excellent transient response combined with maximum efficiency conslstent with the bandurldth of the driver Mounted in a ported enclosure having an internal volume of 3.2 cubic feet, the unit is energized by a 19pound magnetic assembly housing an Alnico V magnet. Closed construction and precise construction tolerances of the assembly concentrate a magnetic field of 12,000 gauss in the voice coil gap. A 4-inch voice coil, fabricated of copper urlre milled to a ribbon and hand wound on edge, 1s mounted on a heat reslstant support affixed to a rigid cone having optimum mass, density and rigidity The cone is supported by a highly flexible termination that damps spurious resonances and allows the long, linear excursion necessary for high volume levels at very low frequencies.
Midrange Loudspeaker The smooth performance and instantaneous transient response of the 8-inch midrange driver is responsible d for the outstanding instrumental clanty and vocal defimtion of the system. A closed magnetic assembly, welghmg 6% pounds, concentrates all the energy of an Alnico V magnet in the voice coil gap The 3-inch edgewound copper ribbon voice coil 1s suspended urlthm a powerful magnetic field having a flux density of 10,200 gauss The integrally stiffened cone is terrmnated with an exclusive JBL ring compliance that allows long excursions while maintaining linear travel High Prequency Loudspeaker Smooth, wdely dispersed high frequency reproduction is provided by a 5-inch cone transducer capable of considerable acoustic output and wide dispersion. It utilizes a W-inch diameter edgewound copper ribbon voice coil suspended within a powerful magnetic field of 16,500 gauss generated by a 2%pound closed magnetic assembly contaimng an Almco V magnet. The voice coil is edgewound for exceptional transient response and acoustic efficiency Like the midrange loudspeaker. the unit is housed in a separate subchamber mthin the 4315 enclosure to prevent acoustical interaction with the other loudspeakers of the system.
Ultra-High Prequencp Transducer The exceptional clarity and realism of overtones lying above 8000 Hz is produced by the ultra-high frequency d transducer. The unit consists of a compression driver and diffraction horn specifically designed for reproduction and dispersion of energy at the extreme high end of the audio spectrum. The compression driver