Coral CX-77 loudspeakers

12-inch 3-way 3-speaker system

Symmetric Paired Cabinet Systems - Enclosure

The higher the performance of the speakers, the more important the quality of their enclosure becomes. The CX-77 system uses a bass-reflex enclosure, which features a highly condensed multi-layer particle board, eliminating unwanted vibration. The side, baffle and back boards are strongly reinforced. Ester wool, Tetoron wool and soft felt, all with excellent sound properties, are used as acoustic material. The speakers are symmetrically mounted to achieve optimum directivity. Beautifully finished with UVD coating, the CX-77 system enclosure symbolizes the perfection of the system.

 

Woofer

The light, tough cone paper ensures optimal linearity.

Proper balance among tweeter, squawker, and woofer is crucial when assembling a good speaker system. Cone paper, the heart of the woofer, must possess high Young's modulus and be fully flexible. The woofer in the CX-77 speaker system features Coral's own specially developed micro-crystal cone paper, the surface of which is coated with fine hollow crystal grains 0,1 mm in diameter and with a specific gravity of 0,3. thus partial vibration has been greatly enhanced, refining the transient characteristics of the lower and bass ranges. The rest of it, too - the free edge with full linearity, diecasting frame absolutely without resonance, powerful magnetic circuit help - all contribute to some of the richest, most listenable low frequency sounds available.

 

Squawker

Titanium dome ideally shaped to overcome molding difficulties.

Coral, having developed its own exclusive method for loading highly rigid titanium speaker domes, is now able to provide the audiophile with the most superb mid-range speakers ever. The voice coil in these speakers features CCAW winding and flawlessly maintains optimum balance of mass, extending the high range limit ans largely improving transient characteristics. The aluminum bobbin boasts large input resistivity, and a spacious back cavity easily expands the Frequency Response of the lower range to efficiently cover everything from 700 Hz to 7,000 Hz. Clear, faithful sound.

 

Tweeter

A super-tweeter with a super-high limit - 40,000 Hz

The ultimate limit of high-frequency sound reproduction, plus the elimination of distortion and the optimum in transient characteristics. The attainment of these goals is what audio engineers are continually stribing toward - to build a tweeter which will flawlessly reproduce the delicate high-range sound properties of every musical instrument. Coral's is a hard dome-type super-tweeter that uses a diaphragm of 18-micron-thick ultra-thin Super Duralmin having a crossover frequency of 7,000 Hz. The expanded high-range frequency response of 40,000 Hz easily reproduces everything within the normal audible frequency of 20,000 Hz with outstanding directivity. The sound quality is amazing.

 

Level Controller

An attenuator that enables continuous variation of the mid- and high-frequency ranges independently. The levels may be easily regulated simply by removing the front Saran cloth net.

 

Dividing Network

Low-loss design employing a Mylar film capacitor and a coil featuring a high permeability reluctance ferrite core, which refuses to cause linear distortion even under large input. The design brings out the maximum transient characteristics of each speaker, the result being thoroughly well-balanced sounds.

 

Specifications

Enclosure:  Bass-reflex type

Speakers

1 x 300 mm Woofer

1 x 50 mm titanium dome squawker

1 x 20 mm hard dome tweeter

Frequency Response:  30 - 40,000 Hz

Crossover Frequency:  700 Hz ; 7,000 Hz

Output Sound Pressure Level:  94 dB

Program Source Input:  80 W

Impedance:  8 Ω

Dimensions (W x H x D):  390 x 650 x 320 mm

Weight:  22 kg

 

Jensen G-610B Triaxial loudspeaker

Triaxial - 15-inch 3-way Unitary Loudspeakers

 

The famous Jensen G-610B (and G-600) are genuine 3-way unitary loudspeakers, the only 15" speakers made with three electrically and acoustically independent L-F , M-F and H-F radiating and driving systems. These superb 15" speakers represents the ultimate in balance, efficiency, smoothness and tonal purity. They have no equal.

 

G-610B

Unquestionably the world's finest unitary loudspeaker. A precision combination of a 15" woofer with powerful 6-1/2 lb. Damping Factor-Alnico 5-magnet for bass notes to below 25 cycles; low 600 cycle crossover to a thru-bore compression mid-channel horn (whose final section is the entire woofer cone); and compression-driver super-tweeter for response from 4,000 to beyond 20,000 cps.

Heavy cast frame. Separate dual crossover network provided with individual M-F and H-F controls.

Impedance 16 ohms.

Power Rating 40 watts program, 80 watts peak.

Woofer Resonance 50 cps.

Weight: 46 lbs

 

 

Jensen G-600 Triax loudspeaker

 Triax - 15-inch 3-way Unitary Loudspeakers

 

The famous Jensen G-600 (and G-610B) are genuine 3-way unitary loudspeakers, the only 15" speakers made with three electrically and acoustically independent L-F , M-F and H-F radiating and driving systems. These superb 15" speakers represents the ultimate in balance, efficiency, smoothness and tonal purity. They have no equal.

 

G-600

True 3-way performance at moderate cost is yours with the G-600 Triax. Lows from below 30 cycles to 900 cycles are handled by the 15" edge-damped woofer with heavy duty 3-1/2 lb. Damping Factor-Alnico-5 magnet; compression-driver horn-loaded thru-bore midchannel for 900 - 4,000 cycle range, and compression horn phase-balanced super-tweeter for frequency extension beyond 20,000 cps.

Separate dual crossover network, M-F and H-F balance controls.

Impedance: 16 ohms

Power Rating: 35 watts program; 70 watts peak

Woofer Resonance:  35 cps

Weight:  33 lbs

 

Jensen 1200-XL loudspeakers

Contemporary Jensen 1200-XCL 7-speaker, 4-way decor-styled loudspeaker system

Jensen's new 1200-XL four-way loudspeaker systems blend the ultimate in high-fidelity sound reproduction with finest furniture styling.

Seven, speakers, uniquely arranged in a solid acoustic enclosure, provide sound magnificence for the most discriminating ear. Crisp, clear high notes. Pure, bold midrange. Full, rich bass notes. The entire sound spectrum - from 15 to 25,000 cycles - comes to life as never before. Controls for both mid-range and high-frequency permit exact musical balance for room conditions. This Contemporary model with pleated, textured grille fabric, is of open-grain oiled walnut. Mediterranean and Early American cabinets on following page are of select distressed pecan.

The 1200 XL series represents the finest loudspeaker systems Jensen has ever built.

 

Specifications

Components:

Four 15" FLEXAIR® woofers with a combined magnet weight ot 14,4 lbs; a compression-driver horn-loaded midrange; a compression-driver horn super-tweeter and a direct radiating Sono-Dome® ultra-tweeter

Frequency Range:  15 - 25,000 cps.

Crossover Frequencies:  500, 4000 and 10,000 cpe

Power Rating:  100 watts

Total Magnet Weight:  17-1/2 lbs

Impedance:  8 Ω

Controls:  Mid-frequency and high-frequency balance controls on rear of cabinet

Dimensions (W x H x D):  40" x 30-1/2" x 22-3/4"

Shipping Weight:  243 lbs

 

1200-XLM Mediterranean

The cabinet - select pecan with textured grille fabric high-lighted by screened patterns. Reflects the warmth of Mediterranean styling.

Cabinet dimensions: 31-1/4" Height; 40" Width and 22-3/4 Depth

Shipping Weight:  245 lbs

 

1200-XLE Early American

The cabinet - distressed pecan with textured grille fabric. Solid pecan spindles recreate the Traditional look.

Cabinet dimensions: 31-1/4" Height; 40" Width and 22-3/4 Depth

Shipping Weight:  240 lbs

 

Magneplanar MG-II loudspeakers

We'd like to have a word with you. It's about Magneplanar loudspeakers. The word is "revolutionary". Revolutionary design concept; revolutionary sound reproduction, revolutionary beauty. In fact the Magneplanar system is patented because of the unique principles on which it operates. The Speaker are designed to be seen and not heard. So if you're listening to music, all you hear is music, not annoying vibrations from speaker cabinets and cavities. The first time you see Magneplanars you'll know something new is going on. They look like beautiful decorator screens. Or handsome room dividers. We know you've heard the word "revolutionary" before. But you've never heard anything like Magneplanars before.

 

What is Magneplanar?

The Magneplanar loudspeakers is a totally new type of loudspeaker. It is neither a cone type speaker, nor is it an electrostatic. The actual speaker itself is only about 1/8th inch thick. Its construction consist of a large area (planar) permanent magnetic field with a very thin film diaphragm stretched over it. The audio current is carried by conductors which are attached to the diaphragm in a zig-zag fashion.

As the audio current passes through the conductors, the interaction between the magnetic field around the conductors and the permanent planar magnetic field under them causes the entire diaphragm to pulsate. This creates sound waves in the air which is the sound your hear.

 

A few of the important characteristics of Magneplanars

Purely resistive impedance for ideal amplifier loading

Puts out same sound front and back (bi-polar radiator)

No cavity or cabinet wall resonance to colour sound.

Superior transient response throughout entire audio range due to low mass of diaphragm

Distortion level far below other loudspeakers because of complete control of diaphragm

Can be placed to look more like part of furnishings than a loudspeaker

56" long, 1-1/2" wide tweeter section provides horizontal sound dispersion previously unattainable

Fantastic power handling capability

Large radiating area provides width and height and depth of sound only equalled by live performances

The bi-polar radiation of Magneplanas provides a means of optimizing stereophonic and quadraphonic sound imaging.

 

Specifications

System:  Two-way full-range Magneplanar

Midrange/Bass Radiating Area:  500 sq. In

Tweeter Radiating Area:  85 sq. In

Frequency Response:  60 Hz to 18,000 Hz ±4 dB

Power Handling:  up to 200 watts RMS per channel (without equalization)

Minimum Power Required:  Depends of type of listening. If you are a background music listening, 15 - 25 watts might be sufficient. In most cases 40-50 watts is recommended

Efficiency:  85 dB SPL

Impedance:  6 Ω

Crossover System:  2400 Hz

Finish:  Walnut hard wood and light colored fabric

Dimensions (W x H x D):  22" x 71" x 2"

Weight:  41 pounds each

 

Vandersteen Model 3 loudspeaker

The Aligned Dynamic Design

The Model Three uses the proven Vandersteen Aligned Dynamic Design to optimize the dispersion and transient accuracy of the drivers while maintaining the input signal's time and phase integrity. The drivers, their positioning and their associated minimum baffles were developed with the aid of FFT computer analysis to minimise diffraction, cone break-up, multi-driver interference and out-of-band phase irregularities. The construction, alignment and positioning of the driven allow a point-source wave front and maximize the phase coherence of the loudspeaker at the listening position.

The Aligned Dynamic Design is used for the Model Three due to its many potential advantages:

Precise, more dimensional imaging and a wider listening area

A greater flexibility of placement options within the listening room and better "real word" transient response due to the lack of out-of-phase rear-wave cancellations.

A high level of genuine transparency and detail typical of planar speakers without the dege-clamping distortion that exist in all rectangular electrostatic and planar panels

Increased efficiency and improved dynamic range.

 

The components used in the Model Three combine durability and strength with innovative design and construction. The metal-alloy dome-tweeter is a dual-chamber design to improve range and linearity. It is critically damped to extend the high frequencies past audibility without the excessive ringing associated with open or underdamped metal dome tweeters. The alloy used for the dome was chosen for its superior strength and resistance to break-up compared to common dome materials.

With the application of years of experience in FFT computer analysis and research into the negative effects of diffraction, a unique, proprietary midrange driver has been developed that outperforms previous designs in several significant parameters. In conventional cone midrange, the acoustic energy from the back of the cone immediately strikes the front of the driver's magnet assembly and is reflected back through the cone and into the listening room.

This distorted secondary signal created by the internal diffraction smears the sound of the driver and inhibits true transparency. The frontal area of the magnet assembly on the Model Three midrange has been minimized through the use of advanced materials and construction techniques to reduce internal diffraction and the resultant distortion to inaudible levels. With the elimination of this distortion, the sound of the Model Three is cohesive and smooth with a level of inner resolution unequalled by other dynamic loudspeakers.

The active acoustic coupler and woofer use costly cast-metal baskets rather than more common stamped baskets. The cast-metal baskets inherent rigidity and superior vibration control increase cone movement accuracy and reduce sympathetic resonances for cleaner and more natural sound. Filled polycones are used on the woofer and midrange to insure higher internal stiffened and greater neutrality than woven plastic or treated paper cones. The stiff, low weight polycones resist flexing under all drive conditions for lower distortion and increased detail.

The dual-spider active acoustic coupler accurately complements the woofer to reduce box loss, thermodynamic loss and active/passive transfer nonlinearities. This novel Electro-Mechanically Optimized Woofer System provides powerful, detailed and extended bass response as the Model Three operates much more closely to the ideal than any conventional ported or passive design.

 

The crossover in the Model Three is comprised of transient-perfect, first-order networks designed to preserve the phase integrity of the music. It is compensated to allow the drivers to operate in absolute phase with each other for more precise and stable imaging than conventional multi-way speakers using out-of-phase drivers. The crossover's computer grade components, including low impedance air-core inductors and high-quality film capacitors in the signal path, are hand soldered on a double-sided, plated-through PC board tested to insure less than 0,1 dB deviation from a reference circuit. Custom 6N wire with polypropylene dielectric is used for internal wiring to maximize signal transfer.

The crossover is engineered for bi0wiring with a stereo amplifier or two monoblock amplifiers or passive vertical bi-amplification with two identical stereo amplifiers or four identical monoblock amplifiers. Inputs are heavy-duty screw terminals.

 

The baffles holding the drivers of the Model Three are as small as possible to eliminate virtually all of the early reflections that affect dynamic speakers with conventional flat or low diffraction baffles. Reducing both early reflections and edge diffraction improves the imaging and enhances the openness and transparency of the speaker.

The enclosure of the Model Three is constructed of MDF, a wood product far more dense and acoustically inhert than conventional particle-board. Broad-spectrum, low -Q resonances are controlled so as to cancel rather than become additive.

 

Specifications

Impedance:  6 Ω  nominal; 4 Ω  minimum

Efficiency:  89 dB with 1 watt of pink noise input at 1 meter on axis

Recommended Amplification:  100 to 200 watts per channel into 8 Ω .
The amplifier must be stable into a 4 Ω  load.

Frequency Response:

26 Hz to 30,000 Hz ±3 dB

30 Hz to 22,000 Hz ±1,5 dB by FFT step function

Dispersion:  26 Hz to 17 kHz ±3 dB 30degrees off axis

Crossover Frequencies:  600 Hz and 5 kHz First-order, 6 dB per octave

Input Connections:  2 pair of heavy duty screw terminals

Recommended Placement:  12-inches or more from the rear wall,

Cabinet Finish:  Hand-matched and finished natural oiled wood veneers

Dimensions (H x W x D):  48" x 16" x 10,25"

Weight:  88 lbs net

 

JBL 4430 monitor loudspeakers

Developed to meet the challenge of digital and advanced analog recording technology, the JBL Model 4430 {and Model 4435} represent a significant new approach to two-way studio monitor design. The incorporation of the unique JBL Bi-Radial ™ horn in a monitor loudspeaker provides constant vertical and horizontal polar coverage, control of the reverberant field, flat power response, image stability, and coherent sound. The two models also feature improvements in compression driver, low frequency transducer, and dividing network technology. Both systems exhibit the traditional )BL attributes of wide bandwidth, smooth frequency response, high efficiency, wide dynamic range, and exceptional reliability.

The practical benefits of the Bi-Radial monitors include stable stereo imaging that remains fixed over a wide range of horizontal positions, the result of unusually smooth off-axis response. The design allows considerable latitude in physical placement. The wide vertical response, identical to the horizontal, includes both standing and seated listeners within the coverage angle, even in proximity to the monitors.

 

THE JBL BI-RADIAL ™ HORN

The Models 4430 offer performance levels normally achieved by three- and four-way systems. The key to this performance is the JBL Bi-Radial ™ horn 1 and its integration in a monitor design.

Most horn designs compensate for the failing power response of the compression driver with directivity that increases with frequency. This provides flat axial response, but power response that typically falls by 6 dB per octave from as low as 3 kHz. The resulting decrease in coverage angle (as the frequency increases) gives generally poor control of the reverberant field and (in two-way designs) is not well matched to the coverage angle of the low frequency driver at the crossover frequency. By contrast, the JBL Bi-Radial ™ horn provides constant coverage over its operating bandwidth. Both on-axis and off-axis pressure response are flat, and the vertical coverage angle is identical to the horizontal. This angle is wide, 100° x 100°, but very tightly controlled, and it matches the coverage angle of the low frequency driver at the crossover frequency. Additionally, the horn's rapid flare rate reduces second harmonic distortion, and its reduced depth puts its driver in the same acoustic plane as the low frequency driver. The Bi-Radial ™ monitors present a coherent sound source, with extremely stable stereo imaging over a wide variety of listening positions. The monitors offer a high degree of placement flexibility, and the listening position can be quite close with no loss of stereo imaging.

Equalization of the 4430  will typically be needed only to correct for inherent room anomalies rather than for monitor response. This is the result of uniform frequency response within the coverage angle. The controlled power and polar response of the JBL Bi-Radial ™ monitors effectively removes them from the variables with which a recording engineer must contend.

 

HIGH FREQUENCY COMPRESSION DRIVER

The Bi-Radial ™ horn is coupled to a compression driver which is crossed over at I 000 Hz. The driver features a titanium diaphragm with a three-dimensional diamond-pattern suspension . Developed by JBL, this diamond surround offers an extended frequency response normally associated with exotic materials while retaining ruggedness and high power capacity. The diaphragm is pneumatically drawn to shape to eliminate stresses that cause fatigue, and a phasing plug of concentric exponential horns eliminates phase cancellation.

 

LOW FREQUENCY

The low frequency loudspeakers used in the Bi-Radial ™l monitors incorporate the latest technology to deliver smooth response, extended bandwidth, and extremely low distortion. The magnetic structures feature JBL's Symmetrical Field Geometry (SFGI design to reduce second harmonic distortion to inconsequential levels. New adhesives technology and coil former construction improve power handling. The coil itself, 100 mm (4 in) in diameter, is fabricated from edge-wound copper ribbon, and operates in a magnetic field having a flux density of 1.2 T (12,000 gauss). The 19 mm(% in) length of the voice coil allows increased linear excursion, and a careful choice of suspension elements helps to completely eliminate dynamic instabilities.

The 4430 differ chiefly in their low frequency capabilities. The 4430 uses a single 380 mm ( 15 in) low frequency driver and is 3 dB down at 32 Hz; it can handle full power input to 27 Hz.  The system is down 3 dB at 27 Hz and will handle full power down to 22 Hz. The systems use similar low frequency drivers, but the cone assemblies.

 

FREQUENCY DIVIDING NETWORK

The frequency dividing network of the Bi-Radial ™ monitors has a crossover frequency of I kHz and a nominal slope of 12 dB per octave. The cut-off slope and shape were chosen to provide the smoothest possible response over the widest bandwidth, restricting any off-axis anomalies to a very narrow portion. JBL has paid considerable attention to both the off-axis response and the total power response, and the network optimizes these parameters. While

the response is smooth at all angles, the flattest response is, by design, on-axis and above. This offers a greater number of listening positions when the system is mounted at or below ear level; for mounting above ear level, the system can be inverted to offer the same advantages. The network also provides equalization of the compression driver. Because the power response of the driver and the Bi-Radial ™ horn is greater in the midrange than at high frequencies, this equalization attenuates the lower end of the compression driver's response, lowering distortion and giving greater dynamic headroom. The equalization is provided in two stages, allowing separate adjustments (via front panel level controls) for the midrange and high frequencies.

A switch located adjacent to the connection terminals allows the monitor to be bi-amplified. A special crossover card is available for the IBL Model 5234A electronic frequency dividing network to provide the appropriate crossover characteristics.

 

Specifications

Frequency Response:  35 Hz - 16,000 kHz ±3 dB

Sensitivity:  93 dB SPL

Efficiency:  1,3%

Dispersion Angle

Horizontal :  100° (+10°; -30°)

Vertical :  100° (+0°, -30°)

Impedance:  8 Ω  nominal

Max. Power Input:  300 W

Continuous Sound Pressure Level:  119 dB

Crossover Frequency:  1,000 Hz

Driver Complement:

Low Frequency :  2235H

Compression Driver :  2425H

Horn :  2344

Enclosure Volume:  0,14m³ (5 cu. Ft)

Resonance Frequency:  34 Hz

Dimensions:  908 x 556 x 400 mm (480 mm deep w/horn)

Weight Net:  26 kg (57 lbs)

 

JBL4425 monitor loudspeakers

Bi-Radial Studio Monitor

The success of the models 4430 and 4435 Bi-radial studio monitor loudspeakers has prompted JBL to introduce a smaller model based on the same principles for use in smaller studios and for a variety of demanding audio production applications.

As in the case of the larger Bi-Radial monitors, the 4425 maintains a 100-degree-by-100-degree coverage pattern from its crossover frequency (1200 Hz) up to 16 kHz. Smooth power response is ensured from the lowest frequencies up to 1200 Hz, and flat power response is maintained above that frequency. At the same time, axial response is remarkably smooth, and the combination of controlled power and axial response ensures that the reflected sound field in the control room will be free of coloration. The model 4425 also addresses the requirement for accurate stereophonic imaging. The mirror imaged pair creates absolutely symmetrical sound fields, and this is the essential requirement for precise imaging. There is no lobbing for normal off-axis listening positions in the horizontal plane, and vertical lobbing is minimized over the preferred listening arc.

The model 4425 can handle program power inputs of 200 watts, more than enough to accommodate the high acoustical levels demanded in critical listening to today's digital recordings.

 

High-Frequency Horn and Driver

The BI-Radial horn used in the model 4425 is a scaled down version of the model 2344 horn used in the 4430 and 4435 monitor loudspeakers. It is made of high-impact structural foam and is acoustically inert. The high-frequency compression driver is a completely new design making use of a computer-machined phasing plug. Tolerances are held to a high degree, and unit-to-unit variation is small. The disphragm assembly is JBL's unique titanium design, with its advantages of extended frequency response relative freedom from mechanical fatigue, and high acoustical output capability. A copper shorting ring plated on the pole piece controls high-frequency impedance and improves high-frequency response.

As is the case with the larger Bi-Radial monitors, the 4425 system maintains precisely aligned phase response over a forty-gegree wide arc in the horizontal plane. The preferred listening arc in the vertical plane is between zero (on-axis) and ten degrees up.

 

Low-Frequency Transducer

A newly designed driver, the model 2214H, is used in the 4425 monitor loudspeaker. This transducer incorporates JBL's symmetrical field geometry (SFG) magnet structure for low distortion. The 76 mm (3-in) voice coil is made of edge-wound copper ribbon wire for highest sensitivity and power handling. The inner suspension of this transducer has been designed to exhibit a progressive increase in restoring force with increasing displacement. This controls dynamic offset for low-frequency, large excursion signals, and results in reduced distortion at low frequencies. A composite coating on the cone optimizes both damping and stiffness, resulting in smoother response and lower distortion.

 

Frequency Dividing Network

In addition to the normal function of frequency division, the network in the 4425 provides power response compensation for the high-frequency drier. Two controls allow the user to contour both mid and high frequencies to match various room characteristics. While the network slopes are 12 dB/octave, the combination of inherent roll-off characteristics in both high- and low-frequency components of the system with the electrical characteristics yields quite rapid transitions in the crossover frequency. Network components are of the most rugged, low-loss type, and high-quality bypass capacitors are placed in parallel with the larger capacitors in the signal path for increased linearity.

 

Specifications

Frequency Response:  40 Hz - 16,000 kHz ±3 dB

Sensitivity:  91 dB SPL

Efficiency:  0,8%

Dispersion Angle

Horizontal :  100° (+10°; -30°)

Vertical :  100° (+0°, -30°)

Impedance:  8 Ω  nominal

Max. Power Input:  200 W

Continuous Sound Pressure Level:  114 dB

Crossover Frequency:  1,200 Hz

Driver Complement:

Low Frequency :  2214H

Compression Driver :  2416H

Horn :  2342

Enclosure Volume:  53,8 l (1,9 cu. Ft.)

Resonance Frequency:  34 Hz

Dimensions:  406 x 635 x 311 mm (375 mm deep w/horn)

Weight Net:  26 kg (57 lbs)

 

Acoustic Research AR-28BX speakers

Specifications:

System Type:  Floor standing acoustic suspension 2-way system with drive units in a vertical array

Drive Units:

LF :  250 mm (10") acoustic suspension woofer

HF :  25 mm (1") liquid cooled high range driver

Voltage Sensitivity:  2,83 volts produces 89 dB SPL at 1 meter on axis

Efficiency:  1 watt produces 89 dB SPL at 1 meter on axis

Power Requirement:  10 watts per channel minimum

Power Handling Ability:  May be used with amplifiers rated at up to 100 watts per channel

System Frequency Response: -3 dB points at 42 Hz and at 22,000 Hz

System Low Frequency Performance:  -3 dB at 42 Hz with an effective Q at resonance of 74

Impedance:  8 Ω  nominal; 5 Ω  minimum point

Crossover Network: 

Both woofer and high range have second order electrical networks High range has a second order electrical network

Crossover Frequency:  1800 Hz

Cabinet Internal Volume:  35 liters (1,25 cu lt)

Cabinet Finish:  Walnut grain vinyl veneer

Cabinet Dimensions (H x W D):  689 x 330 x 257 mm (27-7/8" x 13" x 10-1/8")

Weight: 15,9 kg ( 35 lbs) 1 speaker net

 

Acoustic Research AR-8BX speakers

 

Specifications:

System Type:  Bookshelf acoustic suspension 2-way system with drive units in a vertical array

Drive Units:

LF :  150 mm (6") acoustic suspension woofer

HF :  25 mm (1") liquid cooled high range driver

Voltage Sensitivity:  2,83 volts produces 87 dB SPL at 1 m on axis

Efficiency:  1 watt produces 87 dB SPL at 1 m on axis

Power Requirement:  10 watts per channel minimum

Power Handling Ability:  May be used with amplifiers rated at up to 75 watts per channel

System Frequency Response: -3 dB points at 62 Hz and at 25,000 Hz

System Low Frequency Performance:  -3 dB at 62 Hz with an effective Q at resonance of 88

Impedance:  8 Ω  nominal; 5,6 Ω  minimum point

Crossover Network: 

Woofer has first order electrical networks plus mechanical slope to give a total of 18 dB/octave

High range has a second order electrical network

Crossover Frequency:  4000 Hz

Cabinet Internal Volume:  9,8 liters (35 cu lt)

Cabinet Finish:  Walnut grain vinyl veneer

Cabinet Dimensions (H x W D):  394 x 244 x 187 mm

Weight: 6,6 kg ( 14,5 lbs) 1 speaker net

 

Marantz Imperial 8 speakers

A Marantz Imperial 8 speaker can handle 125 watts of integrated program material, but reproduces full realism with a fraction of that.

The Marantz Imperial 8 speaker system is just one of two exciting Marantz floor-standing speaker models.

The step-up model Imperial 9 wit tow 10" woofers is designed for higher power handling capabilities as well as high efficiency and mirror imaging. Both models reflect the kind of technical expertise and engineering excellence that has made Marantz the choice of professionals world-wide. Stop by your local Marantz dealer and see the complete line of floor-standing and book-shelf speaker systems starting as low as $59,95

 

Specifications

Frequency Response:  40 Hz to 18,000 Hz ±2 dB (30 Hz to 20,000 Hz ±5 dB)

Sensitivity:  97 dB (1 Watt/0,5 meter, 1 kHz)

Power Rating:  75 watts Continuous (125 watts Integrated)

Distortion Under:  0,5% 100 dB SPL at 0,5 Meter Avg. Of 50/500/5,000/12,500 Hz 2nd and 3rd Harmonics

Nominal Impedance:  8 Ω

Dimensions (H x W x D):  27" x 18-3/4" x 14-1/2"

Marantz Imperial 9 speakers

Mirror imaging is a unique Marantz attraction not found elsewhere. It is achieved by placing the mid-range and tweeter array of both speaker systems in a mirrored position (either both inside or outside of the speaker). By doing this, the stereo image and overall dispersion is exactly symmetrical giving you the most precise stereo sound and separation possible. The Imperial 9 and 8 may be used in the vertical or horizontal position. And mirror imaging is made easy, since the Imperial 8 is designed with a rotatable array, and the Imperial 9 is designed symmetrically. Mirror imaging, a sound feature that speaks for itself.

 

Specifications

Frequency Response:  35 Hz to 17,000 Hz ±1,5 dB (30 Hz to 18,000 Hz ±3 dB)

Sensitivity:  97 dB (1 Watt/0,5 meter, 1 kHz)

Power Rating:  100 watts Continuous (150 watts Integrated)

Distortion Under:  0,5% 100 dB SPL at 0,5 Meter Avg. Of 50/500/5,000/12,500 Hz 2nd and 3rd Harmonics

Nominal Impedance:  8 Ω

Dimensions (H x W x D):  30-1/2" x 24" x 18"

 

JBL 905VX loudspeakers

 

Better Sound in the Home

The same qualities that make JBL monitors the choice of studios make JBL Radiance Series loudspeakers a great choice for your home. Radiance offers strong bass, plenty of "presence" and excellent high frequency response.

Radiance loudspeakers are efficient. A receiver with as little as 10 watts per channel will drive any Radiance Series model to comfortable listening levels. Yet Radiance speakers are rugged enough to be used with receivers or amplifiers delivering up to 200 watts per channel , and they can reach the listening levels demanded for studio-quality sound.

We designed each of the transducers specifically for the Radiance Series, using advanced engineering techniques. Enclosure volumes were precisely calculated, and new dividing networks were developed to blend the outputs of the drivers smoothly at the transition frequencies. Because Radiance loudspeakers are ultimately meant to be heard by people rather than test instruments, the final decisions were made by our listening panels.

 

Specifications

Low Frequency:  250 mm ( 10") diameter

Passive Radiator: 250 mm (10") diameter

Midrange Frequency: 130 mm (5") diameter

High Frequency:  75 mm (3") diameter

Crossover Frequency:  600 Hz, 3000 Hz

Nominal Impedance:  4 Ω

Sensitivity:  88 dB (SPL at 1m/1W input)

Recommended Amplifier Power Range:  10 - 150 watts continuous sine wave per channel

Dimensions (H x W x D):  959 x 413 x 324 mm ( 37-3/4" x 1-1/4" x 12-3/4")

Weight Net:  27 kg (59 lb)

 

JBL 902VX loudspeakers

The Heritage of the Recording Studio

Recording professionals demand the best equipment. Their studio monitors must meet the highest standards of accuracy, controlled dispersion, efficiency, and durability. That's why professionals choose JBL.

In 1978, for instance, 35 of the top 50 albums were recorded, mixed, or mastered on JBL loudspeakers, according to a Recording Institute of America survey.

 

Specifications

Low Frequency:  300 mm ( 12") diameter

Passive Radiator: No

Midrange Frequency: 130 mm (5") diameter

High Frequency:  75 mm (3") diameter

Crossover Frequency:  600 Hz, 3000 Hz

Nominal Impedance:  4 Ω

Sensitivity:  88 dB (SPL at 1m/1W input)

Recommended Amplifier Power Range:  10 - 200 watts continuous sine wave per channel

Dimensions (H x W x D):  699 x 434 x 326 mm ( 27-1/2" x 17-1/16" x 12-3/4")

Weight Net:  20,2 kg (44,5 lb)