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)

 

JBL 702VX speakers

Innovative Styling

Radiance Series loudspeakers follow in the JBL tradition of visual as well as acoustical excellence. With the grille on, the speakers present a simple yet elegant appearance that fits harmoniously into any room. With the grille off, the reflective finish of the baffle can be as subtle or spectacular as you want. The enclosure finish is a furniture-grade walnut-grained vinyl that resists stains and spills.

 

Specifications

Low Frequency:  250 mm ( 10") 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 - 150 watts continuous sine wave per channel

Dimensions (H x W x D):  648 x 404 x 284 mm ( 25-1/2" x 15-7/8" x 11-3/16")

Weight Net:  17,3 kg (38 lb)

 

JBL 502VX speakers

Every step in the design and construction of the JBL Radiance Series, from the initial computer calculations to the final packing, is done at our own Northridge, California headquarters. JBL have complete manufacturing facilities for transducers and furniture, an extensively equipped engineering laboratory, and a complete chemical laboratory. Much of our tooling was designed and built especially by us because none was available that met our specifications.

JBL have more test equipment devoted exclusively to quality control that most speaker companies have in their entire engineering departments. Each finished product must measure up to a laboratory standard by actual test before it can be packed. At JBL we control all the variables, so we don't have to compromise our design goals.

 

Specifications

Low Frequency:  200 mm ( 8") diameter

Passive Radiator: No

Midrange Frequency: No

High Frequency:  75 mm (3") diameter

Crossover Frequency:  2000 Hz

Nominal Impedance:  4 Ω

Sensitivity:  86 dB (SPL at 1m/1W input)

Recommended Amplifier Power Range:  10 - 80 watts continuous sine wave per channel

Dimensions (H x W x D):  546 x 343 x 284 mm ( 22-1/2" x 13-1/2" x 11-3/16")

Weight Net:  12,5 kg (27,5 lb)

 

Pioneer CS-66G loudspeakers

40-watt, 10-inch 3-way speaker system for low-distortion natural sound reproduction

Balanced sound reproduction from  a compact, highly-versatile speaker system is now yours with the Pioneer CS-66G. This smooth, clear-voiced system features three cone type speaker units in a three-way design. Its 10-inch (25 cm) woofer, 6,5-inch (16 cm) midrange and 3-inch (7,7 cm) tweeter reproduce the entire sound spectrum with natural fidelity. Low-distortion/rich performance is assured from any power input up to a maximum of 40 watts , thanks to its high efficiency and sensitivity. This multi-purpose sound system is perfect for use in the average-sized home or office setting for stereo or 4-channel. Its handsome enclosure with walnut grain finish is fitted with a removable, carved wooden grille. Thanks to its compact size, the CS-66G can be placed horizontally or vertically in bookshelf or cabinet-top locations to provide maximum sound dispersion.

 

10-ibch Woofer

A wide range of musical program sources, including those with heavy bass sounds, are handled with ease by the 10-inch woofer in the CS-66G. The so-called "clipping" of low-frequency sound is suppressed to reduce distortion and enhance richness. Since this woofer is especially designed to respond faithfully to signals as low as 35 Hz, it ranks among units in the 12-inch and larger class. It features a large power input capacity and delivers excellent transient response.

6,5-inch Midrange

The brilliance of brass and precision instruments, the richness of the human voice and the all-important middle frequency sound of a full orchestra come through with natural clarity and realism, thanks to the midrange speaker unit in the CS-66G. The back of the midrange is sealed tight to prevent interference with the other two speaker units.

3-inch Tweeter

Distinguished by its fidelity and linear high frequency response characteristics, the 3-inch tweeter in the CS-66G adds a clean, crisp feeling to all music. The overall sound of the CS-66G is further brightened by the exceptionally smooth transient response of this essential unit.

 

Crossover Network

As in all-multi-way speaker systems, the crossover network in the CS-66G goes a long way in determining overall quality. Pioneer has employed selected quality parts, including a large ferrite core, to create a special crossover network to handle the full audio spectrum with a minimum of distortion and damping loss.

Walnut-Grain-Finished Enclosure

The easily-removable, carved wooden grille of the CS-66G permits instant inspection of the interior of this advanced high-fidelity speaker system. The oiled walnut-grain side and end panels of the sturdy enclosure harmonize with any decor.

 

Specifications

Enclosure:  Infinite baffle type

Speakers

1 x 250 mm (10") cone type woofer

1 x 160 mm (6-1/2") cone type mid-range

1 x 77 mm (3") cone type tweeter

Impedance:  8 Ω

Frequency Response:  35 to 20,000 Hz

Sensitivity:  92,5 dB/W/1m

Max. Input Power:  40 watts

Crossover Frequencies:  1,000 Hz and 7,000 Hz

Dimensions (W x H x D):  319 x 551 x 290 mm (12-1/2" x 21-5/8" x 11-3/8")

Weight:  12 kg (26 lb 6 oz)

 

JVC SK-55 loudspeakers

JVC Dynamic Hi-Fi Superfine Tri-Speaker System

Here is good speaker . 10" Woofer 3-way speaker system. The JVC model SK-55 3-Way 3-Speaker acoustic suspension speaker system offers you extended frequencies and power ranges to help satisfy the needs of the most critical requirements.

Woofer Characteristics

The 10" rolled free edge woofer uses a Kurt Muller cone paper made from strictly selected material. It reproduces a very deep and rich bass together with a unique Sandwich Edge coated with plastic on both sides

Midrange Speaker

The 3,5" Midrange speaker, also, has the Kurt Muller cone paper. The cone is supported by a ring of glass wool and the center  cap is coated with a special plastic dampener. These combined features produce a sound with good transient and smooth response to cover a wide listening angle.

Damperless Tweeter

The tweeter is a newly developed "Air Suspension Damperless Speaker" and has a very special light diaphragm and voice coil to produce a sharp and clear high frequency sound with good transient response. Also, the beautifully designed diffuser is used for wide dispersion of the sound.

Power Handling Capacity

The power capacity of the combined SK-55 speaker units is a guaranteed 110 watts peak and 55 watts rms.

Controlable High Frequency Response

The built-in continuously variable level control lets you adjust the frequency response in the high frequency range so as to meet the acoustic conditions of your room or to satisfy your preference.

Cabinet Design

The well designed acoustic suspension enclosure has a 1-piece detachable front panel for your convenient adjustment of the tweeter response or to give an idea of visible sound. The cabinet is of beautiful walnut grained vinyl on a particle board that blends nicely with your furniture.

 

Specifications

Type:  3-way, 3-speaker acoustic suspension system

Speakers

1 x 250 mm (10") free edge woofer with Kurt Muller cone paper

1 x 90 mm (3-1/2") mid- range with Kurt Muller cone paper

1 x 60 mm (2-1 \2") cone tweeter

Power Handling Capacity:  100 W (peak), 55 W (RMS)

Frequency Response:  35 - 20,000 Hz

Impedance :  8 Ω

Sound pressure:  91 dB at 1 m

Crossover Frequency:  2,000 Hz; 8,000  Hz

Front Grille:  Dark Brown, removable

Dimensions (W x H x D):  304 x 540 x 235 mm (12" x 21-1/4" x 9-1/4")

Weight:  9,5 kg (21 lbs)

 

JVC SK-33 loudspeakers

JVC Hi-Fi Quality SK -33 Speaker System, Efficient and beautiful.

This latest JVC SK-33 beautiful and efficient 50 peak watts , 2-way, 2-speaker acoustic suspension system gives you those fully rich highs, mids and deep lows of marvellous sounds as well as allowing you a choice of beautifully designed cabinets with detachable and replaceable front grills in two gorgeous red or brown colors.

Woofer

The JVC specially designed 200 mm rolled free adge and high elastic woofer produces a full frequency range of powerfully deep bass sounds.

DU Paprer Cone

Kurt Muller 's special cone paper us used to reveal high tonal quality, high elasticity, low distortion as well as rich and powerful lows. It is regarded as the best cone paper in the world.

Voice Coil

The flexible woofer's strong , long traveling aluminum bobbin voice coil is connected to the paper cone using a thermosetting adhesive which enables it to withstand a strong input power of 50 peak watts.

Acoustic Suspension Enclosure

The exceptionally well designed and sturdy cabinet has rugged acoustical materials assuring powerfully clear highs and deep distinctive lows. It fits into any place in a room and blends nicely , with the furniture.

 

Specifications

Type:  2-way, 2-speaker acoustic suspension system

Speakers

1 x 200 mm (8") free edge woofer with Kurt Muller cone paper

1 x 50 mm (2") cone tweeter

Power Handling Capacity:  50 W (peak), 25 W (RMS)

Frequency Response:  40 - 20,000 Hz

Impedance :  8 Ω

Sound pressure:  91 dB at 1 m

Crossover Frequency:  3,000 Hz

Front Grille:  Red or Dark Brown, removable

Dimensions (W x H x D):  253 x 456 x 205 mm (9-15/16" x 17-15/16" x 8-1/16")

Weight:  5,2 kg (11,5 lbs)

 

Bose Model 501 speakers

The Bose Model 501 Direct/Reflecting speaker system incorporates a ten-inch woofer and two three-inch tweeters along with a unique Direct Energy Control allowing the speaker system to easily adapt to your listening room.

Utilizing the walls, ceiling, and floor of your listening room to reflect sound, the Model 501 creates a sense of spaciousness with a strong center image. By radiating the high-frequency sound through the side and front grille panels, the 501 simulates the proportion of reflected and direct sound experienced in the larger environment of a live performance.

The ten-inch woofer found in the Model 501 provides outstanding bass performance while providing a portion of the direct sound at middle range frequencies. The extra-long excursion suspension yields powerful low distortion bass reproduction.

The Model 501 Direct Energy Control adjust the percentage of Direct Sound radiated into the listening area. This control primarily affects the spatial distribution of high-frequency energy and can be used to compensate for speaker placement and listener taste.

 

 

Specifications

Spatial Characteristics :  the Model 501 utilizes Asymmetrical Design for optimum stereo reproduction with rear and side wall reflections. The tweeters, angled toward the rear walls, reflect sound energy into the main listening area. A Direct Energy Control provided with the outward-directed tweeter allows control of the spatial characteristics of the speaker system. The Model 501 is designed in mirror-image pairs for optimum stereo reproduction.

Speaker Configuration :

Woofer - One ten-inch acoustic suspension woofer utilizing a long-throw 1,5-inch diameter voice coil with 16-ounce magnet. Linear high-excursion suspension system provides high output capability.

Tweeter - Two three-inch, wide-range tweeters with extended low-frequency response for use with Direct Energy Control Flat Total Power Radiation to over 16 kHz

Enclosure -  A walnut grain vinyl clad, floor-standing loudspeaker with acoustic suspension design and acoustically transparent side panels.

Impedance :  The impedance of the Model 501 speaker system is conservatively rated at 4 Ω , hower, since the impedance of the Model 501 is substantially above 4 Ω  over all but a small portion of the frequency range high quality receivers can operate an additional pair of 8 Ω  speakers or a second pair of 501's (connected in parallel) with no difficulty.

Power handling:  The minimum recommended power - 20 watts rms per channel. Amplifiers rated over 50 watts can be used with the Model 501, however, each channel should be fused.

Dimensions (W x H x D):  14-1/2" x 24" x 14-1/2"

Weight:  42 lbs

Yamaha NS-2000 speakers

Natural Sound Speaker System

Pure Carbon Fiber Woofer Cone

Improved Beryllium Midrange and tweeter Domes

Unique In-line Speaker Configuration and Rounded Baffle

Uncompromising Choice of Materials and Construction Throughout

Superbly Crafted Cabinetry

 

The lead in sound-oriented technology that has grown out of a hundred-year tradition has been purposefully expanded in this loudspeaker system. Although Yamaha sound transducers are "digital-proof" thanks to fast and precise signal processing, the NS-2000 system is a resounding testament to the fact that research has not rested in this area either.

 

Further refinement of the exclusive beryllium and carbon fiber technology, weight reduction of the membranes and unrivalled experience in processing valuable woods create the Yamaha system in a class of its own, with which digital progress can be heard.

 

The baffle with rounded edges reduces diffraction and ensures increased stereo definition. The precision housing was developed on the basis of irrefutable computer calculations, coupled with knowledge of sound. The bass membrane made of pure carbon fiber is super light and ultra-stable with a diameter of 33 cm. New beryllium domes have a drastically reduced weight of 0.028 g for the tweeter and 0.5 g for the midrange. The crossover is equipped with coils made of oxygen-free copper wire and large-dimensioned ferrite cores. Level controls for the tweeter and midrange are a matter of course in this class.

 

Specifications

Type:  Fully enclosed bookshelf type

Speakers:

Low Frequency :  JA3301 Woofer carbon diaphragm 330 mm (13") cone

Mid Frequency :  JA0802A Midrange Beryllium diaphragm 88 mm (3-1/2") dome

High Frequency :  JA0526A Tweeter Beryllium diaphragm 30 mm (1-3/16") dome

Nominal Input Power :  125 W

Music Input Power :  250 W

Impedance:  6 Ω

Sound Pressure Level :  90 dB/W/m

Crossover Frequencies:

Low/mid :  500 Hz (12 dB/oct)

Mid-high :  6 kHz (12 dB/oct)

Level Controls:

Mid :  +3 dB (Continuously variable)

High :  +2 dB (Continuously variable)

Enclosure:  Fully enclosed type

Volume :  80 l

Exterior:  American walnut Urethane open pore finish

Dimensions (W x H x D):  440 x 752 x 404 mm (17-5/8" x 29-5/8" x 15-7/8")with grille attached

Weight:  47 kg (103 lbs 6 oz)