Electro-Voice SP12 loudspeaker

 

Incorporating all the design advantages of the famous E-V Radax coaxial principle, the E-V Models SP12 (and SP12B) full-range coaxial reproducers include the latest developments in the electro-acoustic art.. Bass response is extended affording, for the first time, pleasing musical balance without the masking effects previously experienced from increased high-frequency reproduction. Tailored to optimum listening requirements, these new developments insure smooth, even coverage of the entire listening area.

 

Eclusive, E-V engineered features include true coaxial mounting of both reproducing elements insuring smooth room coverage, augmented balanced bass response in conjunction with smooth extended high-frequency reproduction. The carefully tailored midrange characteristic provides realism and "presence" at usual sound levels, off setting ear insensitivity at low volume. The exclusive Radax design features a true acoustical crossover in which the mass of the bass cone and its voice-coil coupling compliance is no proportioned as to decouple the woofer above crossover. The Radax unit is free from phasing dips and displays less than 1,4% Total Harmonic Distortion above crossover. The edgewise wound aluminum voice coil design affords 18% more efficiency and consequent damping of transient distortion. An unusually heavy magnet structure is used.

 

Specifications

Frequency Response:  30 - 13,000 Hz

RETMA Sensitivity Rating:  48 dB

Free-Space Cone Resonance:  35 - 45 Hz

Impedance:  16 Ω 

Power Handling Capacity

Program :  25 watts

Peak :  50 watts

Critical Damping Factor

In Aristocrat enclosure:  2,0

In an infinite baffle:  1,0

Voice Coil Diameter:  2,5 -inch

Magnet Weight:  3 lb

Mechanical Crossover:  3000 Hz

Dimensions

Diameter :  12-1/4" (7-3/4: d. overall)

Mounting:  11-1/2" diameter (four 1/4" holes equally spaced on circle)

Baffle Opening:  11"

Net Weight:  19 lbs

Electro-Voice SP12B loudspeaker

 The Model SPB12 (and SP12) may be used as low-frequency drivers in expanded separate 2 and 3-way systems. In this application, the operation of these units is comparable to the E-V Models 12 W and 12BW LF drivers. Compatible components for use with these drivers are shown on the 'Building-Block Method" Compatibility Chart.

 

Specifications

Frequency Response:  30 - 13,000 Hz

RETMA Sensitivity Rating:  46,5 dB

Free-Space Cone Resonance:  40 - 50 Hz

Impedance:  16 Ω 

Power Handling Capacity

Program :  20 watts

Peak :  40 watts

Criticasl Damping Factor

In Aristocrat enclosure:  4.0

In an infinite baffle:  2.5

Voice Coil Diameter:  2-inch

Magnet Weight:  1 lb

Mechanical Crossover:  3500 Hz

Dimensions

Diameter :  12-1/4" (6": d. overall)

Mounting:  11-1/2" diameter (four 1/4" holes equally spaced on circle)

Baffle Opening:  11"

Net Weight:  8-3/4 lbs

Electro-Voice SP15 loudspeaker

Electro-Voice Models SP-15 (and SP15B) are massive, 15-inch reproducers of deluxe construction. They offer outstanding performance as full-range loudspeakers or as low-frequency drivers in mutiway systems. The EV Radax coaxial principle employed in these speakers offers as extended high-frequency response beyond the normal capability of ordinary 15-inch loudspeakers; and the combination of outstanding magnetic structure, edgewise wound voice coil, and viscous-damped cloth cone suspension makes possible an unusually low cone  resonance and extended low-frequency response.

The Model SP15 incorporates an exclusive E-V circuit which dramatically improves high-frequency response through control of speaker impedance at high frequencies. Action of this unique circuit and adjustment of the speaker's high-frequency response is determinate by the setting of an auxiliary brilliance control.

 

SP15 Brilliance Control

Since the Model  SP15 was introduced several years ago, a number of improvements have been made in its design. Among the most effective is the additions of a brilliance control to allow adjustment of the speaker's high-frequency response to individual taste and room acoustics. The best guide to setting this control properly is, of course, a familiarity with the sound of live music. Acoustically "hard" or "live" rooms will require a retraed setting of the brilliance control to compensate for the greater amount of high-frequency reflection. In "soft" or "dead" rooms with soft furniture, carpeting, and draperies a more advanced setting of the high-frequency control will normally be required.

 

Specifications

Frequency Response:  25 - 15,000 Hz

Impedance:  8 Ω 

Power Handling Capacity

Program :  40 watts

Peak :  80 watts

Voice Coil Diameter:  2,5 -inch

Magnet Weight:  4 lb 10 oz

Magnet Material:  Ceramic

Nominal Cone Resonance:  25 Hz

Mechanical Crossover:  3500 Hz

EIA Sensitivity Rating:  53 dB

Dimensions

Diameter :  15-1/8" (8-1/4: d. overall)

Mounting:  14-7/16" diameter (four 1/4" holes equally spaced on circle)

Baffle Opening:  13-1/2"

Net Weight:  25 lbs

 

Electro-Voice SP15B loudspeaker

RADAX Coaxial Speaker

The Radax extends both bass response and high-frequency reproduction in pleasing musical balance-insures improved coverage of the entire listening area-minimizes distortion.

 

 

This exclusive E-V development achieves highest efficiency with economy. Two separate coaxially-mounted cones operating from a single voice coil, divide the audible spectrum. Each is specifically designed to reproduce its portion of the audible range. The large cone "woofer" provides maximum bass reproduction; the small cone gives effective high-frequency propagation. True mechanical crossover permits smooth transition and reproduction of lows and highs in proper phase and balance, without phasing dips at the crossover frequency. With the Radax, you have a coaxial two-way system that assures clean, sparkling, wide-range reproduction.

 

Specifications

Frequency Response:  3 - 15,000 Hz

Impedance:  8 Ω 

Power Handling Capacity

Program :  30 watts

Peak :  60 watts

Voice Coil Diameter:  2 -inch

Magnet Weight:  1 lb 6 oz

Magnet Material:  Ceramic

Nominal Cone Resonance:  30 Hz

Mechanical Crossover:  3500 Hz

EIA Sensitivity Rating:  51 dB

Dimensions

Diameter :  15-1/8" (7-5/8": d. overall)

Mounting:  14-9/16" diameter (four 1/4" holes equally spaced on circle)

Baffle Opening:  13-1/2"

Net Weight:  12 lbs

 

Electro-Voice 15TRX loudspeaker

Incorporating all the design advantages of the famous Electro-Voice Radax Coaxial principle, the 15TRX and 15TRXB integrated 3-ay loudspeakers include, also, the latest developments in the art. Of reproducing the highhest audible frequencies through the use of integral Super Sonax VHF drivers. Bass response is excellent, affording pleasing musical balance without the masking effects often experienced from extended high-frequency reproduction.

Both the 15TRX and 15TRXB loudspeakers are tailored to optimum listening requirements; latest developments incorporated insure uniform, smooth coverage of the entire listening area. The engineered features of these E-V integrated 3-way speakers include true concentric mounting of all reproducing elements; augmented balanced bass response in conjunction; carefully tailored mid-range characteristic to provide realism and a considerable degree of "presence" at usual sound levels.

Further benefits are afforded in the high-frequency section of the Electro-Voice integrated 3-way speakers by the incorporation of E-V developed diffraction horns to achieve the best dispersion. An adjustable "brilliance" control is incorporated to allow matching of response to room acoustic, compensating for high-frequency absorptive effects of heavy draperies and soft furnishings. A true 2-way electrical crossover network minimizes distortion, and a massive ceramic magnet assembly provides highest efficiency, excellent damping and extended range.

 

Specifications

15TRX loudspeaker

Frequency Response:  25 - 20,000 Hz

Nominal Resonance:  25 Hz

Corssovers:   2,000 Hz (mechanical); and 3,500 Hz (electrical)

EIA Sensitivity Rating:  55 dB

Power Capacity

Program Material :  40 watts

Peak :  80 watts

Nominal Impedance:  8 Ω

Magnets

Woofer :  4 lb 10 oz Ceramic

Tweeter :  6,8 oz Alnico V.

Size: 15-1/8" diameter; 13-1/2" baffle opening; 8-1/4" depth behind panel

Net weight:  27 pounds

Price:  $166,00

 

Electro-Voice 15TRXB loudspeaker

Both the 15TRXB and 15TRX incorporate the exclusive Sonophase throat design in the high-frequency section. The importance of the Sonophase throat is paramount above 12 kHz where sound must be taken from the center of the diaphragm and periphery simultaneously. In this design this is accomplished without destructive interference or cancellation within the sound chamber.

 

Specifications

15TRXB loudspeaker

Frequency Response:  30 - 20,000 Hz

Nominal Resonance:  30 Hz

Corssovers:   2,000 Hz (mechanical); and 3,500 Hz (electrical)

EIA Sensitivity Rating:  52 dB

Power Capacity

Program Material :  30 watts

Peak :  60 watts

Nominal Impedance:  8 Ω

Magnets

Woofer :  1 lb 6 oz Ceramic

Tweeter :  3,16 oz Alnico V.

Size: 15-1/8" diameter; 13-1/2" baffle opening; 9" depth behind panel

Net weight:  14 pounds

Price:  $94,50

Electro-Voice 15TRX Mark II loudspeaker

Electro-Voice 15" three-way speakers

 

15 TRX Mark II

Similar to the fine 15 TRX except slightly less efficiency and bass response.

Excellent value for superior sound.

Response:  30 - 20,000 Hz

Nominal Resonance:  33 hz

Crossovers:  2,000 Hz (mechanical); 3,500 Hz (elecrtical)

With tweeter level Control:  60 watts peak and 8 ohms impedance

EIA Sensitivity Rating:  50 dB

magnets:

Woofer:  1 lb 6 oz ceramic

Tweeter:  3,15 oz ceramic

Size: 15-1/8" diameter; 13-1/2" baffle opening; 8-1/4" depth behind panel

Net weight:  19 lbs

Price:  $144,00

Bell HF-2240

High Fidelity sound at moderate cost.

Bell Coaxial Loudspeaker - to hear it is proof conclusive that you can have.

Here is the long sought for ideal. A twelve-inch coaxial speaker in which top-flighy electronic engineering, acoustical designing, and the best of materials are combined, to satisfy the high fidelity enthusiast's ear, at a price he can afford.

In this Bell Loudspeaker an efficient low-frequency driver cone is teamed with a high frequency radiator, coaxially mounted, to reproduce both voice and music with unusual audio faithfulness. Cone and radiator are acoustically arranged for distribution of sound over a wide room area. From felt buffer mounting rim to its heavy Alnico Vmagnet, the Bell Model HF-22440 is engineered for output which  - measured by ear or instrument - is uniformly smooth and flat in the "presence" region.

This speaker has been carefully designed for use with any one of Bell's High Fidelity Amplifiers.

Specifications:

Rated Wattage:  30 watts

Voice Coil Diameter:  2"

Frequency Response:  38 - 13,600 kHz ±6 dB

Voice Coil Impedance:  8 Ω

Crossover Frequency:  2400 kHz

Magnet:  Alnico V

Weight:  1 lb

Overall Size:  12-1/8" diameter

Depth:  6-1/2"

Baffle Opening:  11" diameter

Shipping Weight:  9 lb

Technics SB-RX 50

For superlative digital and audio visual source reproduction the natural choice is Technics coaxial flat loudspeakers. The development speaker combines the even response characteristics of flat diaphragm speakers with the superior stereo imaging of a linear phase system. Furthermore by  placing the high frequency unit coaxial with the bass unit further benefits in terms of stereo imaging are achieved as the whole speaker system now operates as an ideal point source with the added benefits of flat diaphragms. Disturbances in the frequency response of conventional cone speakers due to the effect of the cavity cannot arise with the coaxial flat diaphragm speaker, leaving the crossover in the ideal situation to combine the two drive units.

Coaxial 2-way Flat Diaphragm Speaker System features:

240 mm flat diaphragm bass unit with coaxial 28 mm flat diaphragm tweeter producing an ideal point source for precise stereo imaging.

Bass unit diaphragm constructed of rigid cross carbon material maintaining pistonic motion to above 4 kHz.

Tweeter diaphragm of mica epoxy resin for higher strength and lowest mass, High efficiency samarium cobalt tweeter magnet system

Balancing magnets reduce external magnetic field for AV use so that alonside a TV monitor the SBRX50 will have no adverse effects on the picture.

High purity LC-OFC wiring

Input power 80 W (160 W music)

Specifications

Configuration System:  Coaxial 2-way, 2 driver, bass reflex system

Speakers:

Woofer :  240 mm (9-1/2") flat diaphragm type

Tweeter :  28 mm (1-1/8") flat diaphragm type

Power Handling Music (DIN) :  160 W (80 W)

Impedance:  6 Ω Nominal

Sensitivity:  85 dB at 1 W/1 m

Crossover Frequency:  2,200 Hz

Frequency Range:  30 Hz - 48 kHz (-16 dB)

Dimensions  (W x H x D):  300 x 480 x 82 mm (11-13/16" x 16-29/32" x 11-3/32")

Weight:  16,5 kg (36,4 lbs)

Celestion CX 2012

 Celestion 12" Co-axial Loudspeaker

Handling 20 watts RMS and covering a frequency range of 30 Hz to 18 kHz, this loudspeaker has a moulded foam surround and a horn-loaded treble unit. This treble unit gives wide dispersion of the high frequencies and has a "brilliance" control so that the level can be adjusted to suit room conditions

Features:

1.Hi-Flex "free" surround - provides high compliance, eliminates standing waves and surround resonance. Guaranteed moisture resistant. 

2.Two Voice Coils - extra long bass voice coil and precision mounted H.F. coil ensure clean extended frequency coverage. 

3.Compression horn loaded treble unit - for linear and wide angle distribution of high frequencies.

4.High flux ceramic magnets - ensuring high input/output ratio

5.Pure electrical cross-over - provides smooth frequency transition and feed to the appropriate voice coil

6.Rigid die-cast chassis - giving permanent precision alignment

7.High Frequency level - or "brilliance" control allows adjustment of high frquency level to suit room conditions. Complete with 30" of cable, escutcheon and control knob

Specifications:

Overall Frequency Response:  30 Hz - 18 kHz

Power Handling Capacity:  20 watts RMS 40 watts peak

Fundamental Resonance Frequency:  35 Hz

Crossover Frequency:  4 kHz

Impedance:  15/16 Ω

Ceramic Magnet: 

Flux Density :  17,000 Gauss

Total Flux :  180,000 Maxwells

Voice Coil:

Bass :  44 mm (1 ¾") diam.

Treble :  25 mm (1") diam. Aluminium Wire

Chassis (Die-cast Alloy):

Overal Diameter :  317 mm (12 ½")

Overal Depth :  139 mm (5 ½")

Baffle Hole:  279 mm (11")

Net Weight:  7,5 kg (16 lb 110 oz)

Weight (including packing):  8,6 kg (19 lb)

Electro Voice 12 TRXB

 Integrated 3-way speaker Features:

Massive die-cast frame

Viscous damped cloth suspension

Ceramic magnet

Integral Sonophase VHF driver

Incorporating  all the design advantages of the famous Electro-Voice Radex Caaxial principle, the Electro-Voice Model 12 TRXB integrated 3-way loudspeaker includes, also, the latest developments in the reproduction of the highest audible frequencies through the use of an integral Super Sonax VHF driver.

The  12 TRXB emplous the Model T35B VHF driver base response is excellent, affording pleasing musical balance without the masking effects previously experienced from extended high frequency reproduction.

 The 12 TRXB loudspeaker is designed to meet optimum listening requirements; latest developments incorporated insure even, smooth coverage of the entire listening area. The engineered features of the Electro-Voice integrated 3-way speaker system include true oncentric mounting of all reproducing elements; augmented balanced bass response in conjunction with smooth, extended high frequency reproduction, carefully tailored mid-range characteristic to provide realism and a considerable degree of "presence" at usual sound levels. The 12 TRXB incorporates in the high frequency section the Sonophase throat design.

The importance of the Sonophase throat design is paramount above 12 kc, where sound must b taken from the center of the diaphragm and the outer periphery simultaneously.

At lower frequencies, where the diaphragm is a piston, and no phase shift is required in the path configuration, the longer central path length does not appreciably change the phase due to the longer wave lengths involved. Further benefits are affored in the high frequency section of the Electro-Voice integrated 3-way speaker systems by the incorporation of Electro-Voice developed diffraction horns as the method of achieving the best dispersion. In stereophonic use especially, a 3 dB concentration of sound in one portionof the subject, with the resultant distortion of the solid or stereo effect. An adjustable "brilliance" control is incorporated to allow matching of response to room acoustic, compensating for high frequency absorptive efects of heavy drapery and soft frnishhings; crossover network with full 12 dB per octave slope minimizes distortion; edgewise-wound aluminum voice coil design affords 18% more efficiency and consequent damping of transient distortion.

Specifications:

Frequency Response:  35 to 18,000 Hz

Electrical Crossover:  Integral 3500 Hz

EIA (RETMA)  Sensitivity Rating:  52 dB

Power Handling Capacity:

Program Material :  20 watts

Peak :  40 watts

Nominal Impedance:  16 Ω

Voice Coil Diameter:

Woofer :  2 ½ inch

Tweeter :  1 inch

Magnet Weight:  1 lb 9,16 oz

Gauss: 

Woofer :  12,000 G

Tweeter :  9,000 G

Dimensions  (diam.  x  deep):  12 ¼ inch x 7 inch

Mounting:  four 9/32 holes on an 11-1/2in circle

Baffle Opening:  10 ½ inch

Net Weight:  11 lbs

Jensen H-520

 Jensen H-520 High-Fidelity loudspeaker features:

15-inch coaxial speaker

A compression driver horn-loaded tweeter

A multi-cell horn in the tweeter

A high frequency balance control as an integral part of the speaker system

A true two-way system, two separate and distinct loudspeakers with expertly coordinated performance. 

 The superior presence and the unusual cleanness and thrilling realism of music reproduction cannot be approached except at far greater cost. Compression driver unit loaded by a six-cell horn reproduces frequencies above 2000 cycles. New improved full frequency dividing network. Highly efficient 15" low-frequency unit. Low-frequency balance control permits precise adjustment of high-frequency output for exact balance with low-frequency output for brilliant reproduction without shrillness. Control equipped with 36" cable, satin brass flush mounting escutcheon cupand bar knob.

Meeting all of these requirements correctly is of course the final test of maximum performance and value. In H-520 this maximum combination of performance and value is guaranteed by the recognition accrded jensen products for more than a quarter century as the world quality standard.

Specifications H-520

Power Handling:  25 watts

Frequency Response:  30 - 15,000 Hz

Woofer Range:  30 - 2000 Hz

Tweeter Range:  2000 - 15,000 hz

Crossover Frequency:  2000 Hz

Impedance:  16 ohms

Baffle Opening:  13 ¼

Dimensions:  Diameter 15-1/8"; Depth 9-3-4"

Weight: 16 lbs

Jensen H-222

Model H-222 12" Coaxial Speaker

Highly popular 12" coaxial speaker. Provides unusual clarity of sound und wide range. Compression-driver tweeter is loaded by a 6-cell Hypex horn; insures maximum efficiency and wide-angle dispersion of high frequancies from 2000 to 15,000 cps. Features improved, two channel electrical crossover network. Crossover frequency is 2000 cps. Tweeter horn passes through the core of a heavy-duty 1 ¾ lb magnet. Woofer covers 30 to 2000 cps. Includes high-frequncy balance control. Capacity, 25 watts, impedance, 16 ohms, shipping weight, 13 lbs

Specifications H-222

Power andling:  25 watts

Frequency Response:  30 - 15,000 Hz

Woofer Range:  30 - 2000 Hz

Tweeter Range:  2000 - 15,000 hz

Crossover Frequency:  2000 Hz

Impedance:  16 ohms

Weight: 13 lbs

Goodmans Triaxiom 212

 Need proff of the clear, clean, true sound reproduction of a loudspeaker by Goodmans. First, check the response curves charted below.

They dramatically reveal the smooth, undistorted frequency response over the audio spectrum. Translated into musical terms, the Goodmans speaker reproduces sound with proper balance, clarity and realism … achieving perfect separation of instruments, peak-free highs and well-defined, clear bass tones. This quality instrument is the perfect example of British precision and craftsmanship.

One of the many outstanding custom features on all goodmans speaker is the "Rigid-Flex" cone … a completely flexible, free-floating cone rim and completely rigid cone center to provide pure piston action.

Triaxiom 212 Features:

Finest value ever offered in an integrated 12" three-way loudspeaker.

Extra-heavy, high-efficient magnets for maximum performance.

Smooth, undistorted response from 20 to 20,000 Hz.

Unusually sturdy construction with rigid, die-cast chassis.

Power handling capacity is 25 watts

Total flux is 178,000 Maxwells.