Legendary JBL 4343 Studio Monitors, Restored and Spectacular, See Video

Description: Legendary JBL 4343 Studio Monitors, Restored and Spectacular, See Video Legendary JBL 4343 Studio Monitors, Restored and Spectacular, See Video Now ready for a new lucky owner! The 4343 has been our in-house vintage reference speaker for some time. These are one of the most sought after monitors ever made, only to be outdone by the overly massive JBL model 4350. We sold an exact set last year and we were holding on to this pair. However we just sourced another pair in need of restoration so we have to make room. This is a very capable speaker still relevant compared to what is being produced today. It provides a full, warm, accurate, and rich sound like no other vintage speaker we have heard. Restored and looking gorgeous with new surrounds, light refinishing, cleaning of all controls, and thorough testing in our listening room. *Included in the listed price: These will ship via freight securely packaged and strapped to a shipping pallet within the lower 48 US States for a flat $1200. We ship worldwide so contact us if you're outside of this area and would like a quote. Service Notes:• All midrange drivers and woofers had their surrounds professionally replaced.• Lens velcro was replaced on both the speaker and lens surfaces.• Light cosmetic repair performed to tops of wood surfaces.Cosmetic Notes:• Wood surfaces show moderate to significant wear including some deep scratches and damaged corners as shown in our photos.• One lens has a couple of chips.• Control plates show some wear and deformation. Controls are not centered in plates but function normally.• Woofer cones show some light blemishes but nothing penetrates the cone surface. One blemish was carefully treated with glue.• The JBL "4343" badges were relocated from the grills to the internal blue surface by the previous owner.Please check out our YouTube video for complete details on these speakers. More from JBL: The 4343 represents an extension of the research and development effort that produced the 4350 Studio Monitor JBL's top system, which uses dual low frequency drivers. This new monitor accurately reproduces the full range of fundamentals and overtones in music at sound pressure levels approximating those of an original performance. The exceptionally smooth wide-band reproduction clarity, transient response and low distortion of the 4343 results from total integration of the components that make up the four-way system so that each transducer reproduces only that portion of the audio spectrum for which it is specifically designed Deliberately restricting the operating bandwidth of the individual drivers results in maximization of each unit's transient response. Another benefit of bandwidth limitation is that each driver operates only in the region of the audio spectrum through which it exhibits controlled sound distribution, thus a dispersion pattern for the complete system is achieved which is ideal for studio use. The passive frequency dividing network supplied with the 4343 controls the acoustic output of all the individual transducers, and may be switched for bi-amplification. Features• Accurate smooth reproduction from 35 to 20,000 Hz, ±3dB• 44 dB SPL at 30 feet with a 1-milliwat input• 101 dB SPL at 10 feet at one-half rated power input• Mountable in vertical or horizontal orientation• Components:15" low frequency loudspeaker, 10" midrange loudspeaker, High frequency compression driver with horn/lens assembly and ultra-high frequency transducer• Balance controls located behind the removable grille• Rear mounted switch for bi-amplification or full passive crossover• Oiled walnut or textured gray enclosure Ultra-High Frequency TransducerOvertones above 9000 Hz are reproduced by 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 consist of a 3-1/4 pound magnetic assembly energized by an Alnico V magnet. The 1,75 inch edgewound aluminum ribbon voice coil, suspended within a field having a flux density of 16,500 gauss is affixed to a heat resistant support bonded to a ring diaphragm pneumatically formed of .0022 inch thick aluminum foil. Output from the diaphragm is directed through the integral diffraction horn, which produces the unit's wide high frequency dispersion pattern. High Frequency Compression DriverThe high frequency compression driver provides smooth, accurate response and is capable of delivering the high power output levels required in monitor applications. The closed magnetic assembly is energized by an Alnico V magnet, weighs 10 pounds and achieves a flux density of 19,000 gauss in the voice coil gap. A ring of pure silver deposited on the circumference of the pole piece maintains uniform impedance through the highest frequencies, extending the bandwidth of the driver. The diaphragm, pneumatically formed of .002-inch thick aluminum foil stock is driven by a 1,75-inch edgewound aluminum ribbon voice coil. The wavefront emerging from the diaphragm is directed through the concentric channels of a phasing plug prior to distribution by the horn/lens assembly. Horn/Lens AssemblyOutput from the high frequency compression driver is distributed through a controlled pattern by the horn/lens assembly. The horn is formed of a rigid casting to eliminate spurious resonance. The exponential taper rate of the horn controls the expansion of the wavefront providing proper acoustic loading of the driver diaphragm and determines the vertical dispersion pattern of the assembly. The acoustic lens functions in a manner analogous to a divergent optical lens. Its 11 plates set at a precise angle to the enclosure baffle panel, provide controlled propagation of high frequency acoustic energy in the horizontal plane. Midrange LoudspeakerThe smooth performance and instantaneous transient response of the 10-inch midrange loudspeaker is largely responsible for the outstanding instrumental clarity, vocal definition and dimensional accuracy of the system. Its closed magnetic assembly weighing 6-1/2 pounds, concentrates all the energy of an Alnico V magnet in the voice coil gap. The 3-inch edgewound copper ribbon voice coil is suspended within a powerful magnetic field having a flux density of 10,000 gauss. The integrally stiffened cone is terminated with an exclusive JBL ring compliance that allows long excursion while maintaining linear travel. Low Frequency LoudspeakerThe 15-inch low frequency loudspeaker is mounted in a ported enclosure having an internal volume of 5,5 cubic feet. The driver features extreme, solid low frequency reproduction with smooth response well past its crossover frequency. The unit is energized by a 13-pound magnetic assembly concentrates a magnetic field having a flux density of 12,000 gauss in the voice coil is hand wound on a heat resistant support. The support is affixed to a rigid cone having optimum mass density and rigidity for exceptional transient response and maximum efficiency with the bandwidth of the driver. Frequency Dividing NetworkThe 4343 is provided with a high level, passive frequency dividing network for the three transitions of the system. The network is fitted with a rear-mounted switch and separate input terminals for bi-amplification. The circuitry has been designed with consideration for the various performance characteristics of the drivers and their location on the enclosure baffle panel. The network has been designed for continuous high power application; capacitors are non-inductive ,non-polarized types with high AC current capacity and special inductors are uséd to minimize power losses within the network. Each inductor is calibrated on a sensitive electronic bridge and its value set precisely. A special circuit card providing the precise crossover characteristics for bi-amplification of the 4343 is available for use in the JBL 5233 or 5234 Electronic Frequency Dividing Network. Conventional electronic networks can be uséd, but they may not have the exact frequency and filter slope characteristics required for optimum performance of the system. EnclosureIn keeping with current trends in studio design that encourage creativity, JBL studio monitor enclosures feature contemporary styling and are offered in two finishes, each with a complementary grille color. The enclosure, however, contributes much more than striking appearance. The low frequency loudspeaker is houséd in a chamber having an internal volume of 5,5 cubic feet. The midrange loudspeaker is enclosed in a separate, isolated sub-chamber having an internal volume of 0,5 cubic feet. The internal volume of the acoustic chambers and physical configuration of the ducted ports are carefully calibrated to properly load the low frequency and midrange loudspeakers for optimum bass response and to control cone excursion, thus minimizing distortion and maximizing power handling capacity of the drivers. To eliminate resonance, the enclosure is constructed of dense 3/4-inch and 1-inch stock with a 15-ply baffle panel; all joints are carefully interlocked and glued, the back side, top and bottom panels are lined with acoustic damping material and are each stiffened by multiple braces glued and screwed to the panel and to the adjacent surfaces of the enclosure. The baffle section which supports the midrange, high frequency and ultra-high frequency transducers may be rotated 90° left or right for horizontal system installations. SpecificationsMaximum Power Input Bi-amplification:Below 300 Hz:75 watts continuous sine waveAbove 300 Hz:75 watts continuous sine waveSingle Amplification:75 watts continuous sine wavePower Output:101 dB SPL Measured at 3,0 m (10 ft) in a room volume of 57 m³ (2000 cu ft) with half rated power inputNominal Impedance:8 ohmsFrequency Response:35 to 20,000 Hz, ±3 dBSensitivity:93 dB SPL measured at 1m (3,3 ft) with 1-watt input averaged from 100 to 1000 Hz;44 dB SPl measured at 9,1m (30 ft) with 1-milliwatt input averaged from 100 to 1000 HzPolar Response:No less than -3 dB at 60° horizontal and 30° vertical to 16 kHzDistortion:1/2 Power, 99 dB SPL/3,0m : 1% or less third harmonic generation from 35 to 800 hzSingle Frequency:2% or less third harmonic generation above 800 HzCrossover Frequencies:300, 1250 and 9500 HzFinish:Textured gray or oiled walnutGrille:Black fabric with the gray finishDark blue fabric with walnutEnclosure Volume - EACH Speaker:Low Frequency Chamber: 156 litres (5,5 cu ft)Midrange Chamber: 14 litres (0,5 cu ft)Enclosure Dimension: 1050 x 635 x 435 mm (41-3/8 x 25 x 17-1/2 inch)Net Weight - EACH Speaker:175 lb (79 kg) The SkyFi Testing Process for Speakers: Our speaker evaluation process starts with a visual inspection of all drivers. We are looking for damaged or deteriorating woofer surrounds, dented tweeter domes, and cone damage. We also inspect the speaker connection points for loose or broken connectors. After the initial visual inspection we connect the speakers to a reference amplifier with our preferred test tracks. With the speakers placed with proper distance we listen to each driver to make sure that they are producing the intended frequencies with no signs of distortion or rattle. During listening tests with test tracks we check for proper stereo imaging and bass response at various listening levels. If there are any audible signs of issues, the speakers are taken to the bench where we perform a frequency sweep to isolate the issue so that it can be resolved by component repair or replacement. Item Included Original Box Not Included Manual Not Included Remote Not Applicable Cables Not Included Physical Condition 7 / 10 Working Condition 10 / 10 *Please scroll all the way down to view additional images for this listing (click to enlarge). ---------- SkyFi Audio - Curators of Vintage Audio Gear SkyFi Audio is a small startup business specializing in the purchase, reconditioning, and reselling of high end audio equipment. We only buy equipment that we admire and are passionate about. No mid-fi, no gimmicks, no junk. Each piece of equipment is cosmetically restored and fully tested in our well-equipped lab by an engineer with 30+ years of experience in the HiFi world. If it does not meet or exceed the original manufactures specifications, it will not be sold. We are very selective about the equipment we purchase, focusing on mostly analog, high-build quality, American, and European built units. Through our sister company, which is an authorized dealer for McIntosh, Audio Research, Sonus Faber, ClearAudio, Project, and Sony ES, we have access to OEM parts, service, and support. ---------- PURCHASING GUIDELINES: 1) This item will be professionally packaged and insured for safe transit to your home unless you opt for local pickup from our shop. All local pickup items are only wrapped in industrial strength clear stretch wrap if the original manufacturer packaging is unavailable. Local pickup is available in Glen Rock, NJ, just a half hour drive from Midtown Manhattan, with convenient parking near our building. If we don’t have the original manufacture’s packaging, we use heavy duty double-ply corrugated boxes with custom made to your item SealedAir Instapak expanding foam custom inserts. In many cases this has proven to be better than the original packaging! We also use high quality fiber reinforced tape to seal our packages. Lightweight items will be bubble wrapped and shipped in a high-quality box. 2) We do not review or accept any offers that do not go through the official eBay system. We have too many items for sale and it is nearly impossible to keep track of offers outside of the official system. Please do not message, email, or text any offers. 3) All listings are eligible for the eBay Global Shipping Program, unless the item exceeds the maximum weight/price requirements to your country. If this is the case simply message us via eBay as we accept bank wire transfers for international payments and frequently ship worldwide via UPS. 4) Please ensure your shipping address is correct within eBay as we will ONLY ship to the eBay/PayPal Confirmed Shipping Address. No exceptions. 5) eBay may charge and collect sales tax to your state/jurisdiction. Please understand we have no control over this. eBay v1.6 × × × × × × × × × × × × × × × × × × × × × × × × × × Buy now and save! Tell a friend Visit store Watch now Postage info Freight - $0.00 Click the Postage tab above the listing description for more info Additional delivery notes PICK UP OPTION Sorry, our items are NOT available for pick-up. PAYING VIA PAYPAL We accept PayPal on our all our items so you can shop with confidence. Simple choose the PayPal option when proceeding through the checkout. Additional Information No additional information at this time Ask seller a question You might also like Dynavector 10x3 High-Output MC Phono Cartridge Music Reference RM-5 MK II Tube Preamplifier with Phono Music Reference RM-9 Tube Amplifier With EL34's Marantz Model 150 Vintage AM/FM Tuner with Scope Contact To contact our Customer Service Team, simply click the button here and our Customer Service team will be happy to assist. Ask seller a question © SkyFi Audio Postage Click the Postage tab above the listing description for more info Payment Accepted Payment Methods PayPal Returns Returns are not accepted Seller will pay for return shipping. eBay integration by

Price: 16729 USD

Location: Glen Rock, New Jersey

End Time: 2024-04-20T14:20:23.000Z

Shipping Cost: N/A USD