Showing posts with label LOUDSPEAKERS. Show all posts
Showing posts with label LOUDSPEAKERS. Show all posts

21 August 2021

Sansui SP-20000 (1973) - Precision Enginereed

loudspeaker

Sansui has three good things (and one bad thing) to tell you about the SP-20000 three-way, floorstanding speaker system introduced in 1973. First, the bad thing: if you play bad music through it, you hear bad music from it. What could be more fair ? The SP-20000 is a full-bodied speaker system entirely without a "personality" of it's own. That's good. The sound waves it puts out are exact conversions of the electrical impulses it receives from your amplifier or receiver. Thus, good or bad, the material you feed it is reproduced accurately and objectively as the medium of high fidelity can achieve. When you hear the results you'll definitely agree that this is good thing number one. Good thing number two is the fact that two of its three active speaker drivers employ a revolutionary Sansui development called the Direct-Drive Ring Diaphragm - or DDRD for short - to improve phase response, transient response and frequency response. The tweeter and midrange units in the SP-20000 are the first commercially available speakers to use this unique system where the voice coil is the diaphragm, and vice versa. Good thing number three is that the total design of the SP-20000 is integrated right down to the most minute detail. A precision-engineered "passive radiator" woofer is included to smooth and enrich the lows. The crossover and level control system is accurate and extremely flexible. The long-excursion, free-surround woofer is capable of very flat (linear) response at all input levels with reduced intermodulation distortion. And to wrap it up, the SP-20000's sensitivity (93dB/m/W, which is high but not too high) means that inputs from the exceptionally big peak of 100 watts clear down to low-power signals are handled efficiently at any listening level. 

The clean and linear musical reproduction of the SP-20000 goes for any kind of music, from bubblegum to Bartok and from jug bands to symphonies. Sansui markets the SP-20000 by the pair, the right-channel unit is a mirror-image of the left-channel unit in terms of speaker placement. Each matched pair of SP-20000 comes with a pair of two-way speaker stands of attractive and strong aluminum tubing. Speakers may be positioned flat or on a slght angle. Technical data: Woofer - 255 mm cone, Passive radiator - 255 mm cone, Midrange - 90 mm horn, Tweeter - 40 mm horn | Power rating 100 W (Max.) | Impedance 8 ohms | Sensitivity 93 dB/W | Frequency range 25 to 40,000 Hz | Crossover 1.500Hz, 7.000Hz 12dB/oct. L-C parallel type | Dimensions without stand 376 W x 786 H x 320 D mm | Weight 30 kg.

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05 June 2021

TELEFUNKEN TLX 3 Professional (1978) - Space Age Technology

 

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Introduced in 1978 the TLX Professional series from Telefunken featured a series of high-tech solutions. The largest model of this series was the TLX 3 Professional which was later replaced by the slightly upgraded TLX 33 model. While the enclosure of the TLX 3 is a traditional particle board with either "metallic-brown" or matte black finish, the front baffle was made of a new type of composite material - a blend of wood particles reinforced with glass-fiber for lower resonance. Built as a 4-way sealed speaker the TLX 3 features a 245 mm long-throw woofer, 65 mm mid-bass dome, 33 mm mid-high dome and a 25 mm dome tweeter. All the dome drivers feature a ferrofluid cooling system borrowed from space technology that helped increasing power handling and damping. The 25 mm dome tweeter is a 3-layer sandwiched material with aluminium as the middle layer. Additionally the tweeter and midrange can be adjusted to adapt reproduction to ambient conditions and to the frequency characteristics of the amplifier and sound sources, the LED bass and treble overload indicator helps you to safely operate the loudspeaker while the tweeter has an additional "Sensistor" protection. Technical data: 200 W Music 120W Nominal power handling | Impedance 8 ohm | Frequnce range 22-25000 Hz | Cross-over frequencies 500/2700/5000 Hz | Dimensions: 35,5x54x27 cm | Weight: 19kg | Original sales price: 750 DM. 

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22 May 2021

YAMAHA NS-1000/1000M (1974) - Pure Beryllium Masterpiece

Loudspeaker

The NS-1000M was the world’s first speaker system to have diaphragms made of beryllium of 99.99% purity — previously considered unobtainable — in its midrange and tweeter. The speaker offered the accuracy and clarity of audio reproduction made possible only by beryllium diaphragms that have an excellent transient response, and earned critical acclaim both at home and overseas immediately after it hit the market in 1974. It was adopted as a studio monitor speaker by the Swedish national broadcasting corporation in 1976, and by the Finland national broadcaster with 200 units ordered in 1978. Even after its successors, the NS-1000X and NS-2000, were introduced, the NS-1000M remained popular and had sold more than 200,000 units over a period of 23 years — before the production of beryllium diaphragms ended and the marketing of the legendary speaker was discontinued in 1997.

Yamaha developed the world's first hard-dome drivers with beryllium diaphragms — the JA-0801 8.8 cm midrange and the JA-0513 3.3 cm tweeter. Beryllium, considered as the ideal diaphragm material for its hardness, lightweight (low density), and stiffness, was extremely difficult to be molded into a diaphragm. Yamaha overcame the challenge of processing beryllium with its proprietary electron-beam vacuum vapor deposition method. The overwhelming sense of spaciousness and clarity made possible by the beryllium diaphragms that took advantage of the metal's sound velocity (higher than that of any other practical metal) shattered the perception people had of speakers — so much so that the NS-1000M, the first speaker system to feature beryllium diaphragms, earned wide acclaim from audiophiles and critics worldwide. Later, the NSX-10000 released in 1986 came equipped with GC beryllium diaphragms made of giant beryllium crystals, and the GF-1 introduced in 1991 featured forged beryllium diaphragms. Until the production of all beryllium diaphragms was discontinued in 1997, a hard-dome driver for Yamaha was synonymous with a beryllium-dome driver.

Positioned as a high-end unit for home use and priced at 145,000 yen at the time of its release, the NS-1000 featured an ebony luxury urethane paint finish exterior, while the NS-1000M, priced at 108,000 yen and aimed at use from the home to the studio, sported a birch semi-gloss black paint finish. With a somewhat large thick-walled cabinet and removable saran net, the NS-1000 weighed in at 39kg, 8kg heavier than the 31kg NS-1000M. As is evident from the difference in price, the cabinet finish of the NS-1000 was lavish enough to rival that of a luxury wood grain piano, but the fearless black design and overwhelming cost-performance of the NS-1000M made it the focus of popular attention. The upgraded NS-2000 released in 1982 and the NS-1000X released in 1986 reinforced the reputation of the original machine, and in the 23 years until the end of all beryllium diaphragm unit production in 1997 it was a long-lasting hit with more than 200,000 units sold.

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08 May 2021

PIONEER EXCLUSIVE model 2401 (1983) - Studio Monitor Speaker System

 

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The Pioneer Exclusive model 2401 was introduced in 1983. This state-of-the-art loudspeaker was available for the mass market branded as Pioneer while for the professional audio sector it was available as TAD TSM-1. Since day one (1975), TAD Labs has been building only the highest quality, technologically leading loudspeaker chassis. Used in countless recording studios worldwide, the name TAD Labs has become an integral part of the professional scene. TAD's philosophy has remained the same to this day: Technological superiority paired with uncompromising authenticity. Introduced in 1983, the state-of-the-art TAD Labs TSM-1 studio monitor quickly gained an excellent reputation. The clear, precise sound, which reflects the energy and passion of live music like hardly any other loudspeaker, gives these TAD Labs models a near monopoly in the eighties. Even by today's standards these legendary transducers are a coveted collector's item. 

The TSM-1 (Exclusive model 2401) is a scientifically-designed monitor speaker system combining five TAD speaker components - two TL-1601a low-frequency loudspeakers, one TD-4001 high-frequency driver, one TH-4001 stabilized dispersion horn, and the TN-1 dividing network. It was designed for use in large studio control rooms. It provides both high power at all frequencies and superior transient response - a rare combination. Thanks to the use of two parallel-driven low-frequency loudspeakers, the maximum sound pressure level is a particularly high 126dB/W at 1m. Its dispersion pattern is critically controlled, based on tests of actual studio acoustics: response is smooth over a wide listening area, and consistently clear directivity can be enjoyed. Specifications: Impedance 4 ohm (when built-in network is employed) | Frequency range 29-20.000Hz | Input level 300 watts (rated) 600 watts (maximum) | Sound pressure level 98dB/W (1m) | Maximum sound pressure level 126db/W (1m) | Crossover frequency 650Hz | Dimensions 1100x900x712 mm | Weight 145 kg.

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17 April 2021

Technics SB-AFP1000 (1988) - Superlative Audio Flat Panel Speaker System

 

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The SB-AFP1000 was an audio flat-panel speaker developed by examining as many as 80 types of test models and thoroughly performing computer simulations. The speaker used a unique twin-cabinet system with both sealed sections and open sections present at the same time in one cabinet. The speaker included eight 30-cm x 80-cm flat units for the low frequencies and four 13-cm x 32-cm flat units for the lower midrange frequencies. In particular, the diaphragm area for the low frequencies was equivalent to a cone woofer with a diameter of 152 cm, and at 124 dB the speaker attained amplitude of 1.27 mm (at 50 Hz). This enabled bass reproduction with low distortion. Characteristic of the AFP was that the bass was emitted in flat waves, and so the system was resistant to adverse effects such as due to indoor refection, and attenuation due to distance was extremely low. As a result, powerful, deep bass extended to the far corners of the space, and the listener was able to feel the subtle air fluctuations with his entire body. The cabinet was given a black-coating mirror finish. The first Audio Flat Panel AFP1000 was delivered to the world renowned Vienna State Opera House for use in playing the performances of singers and orchestras during rehearsals. The modular construction of the AFP System allowed creation of various combinations from "wall to wall" systems to downsized models such as the SB-AFP100 and SB-AFP10.

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10 April 2021

ONKYO Grand Scepter GS-1 (1984) - Super High Fidelity Horn Speaker

 

Loudspeaker

Takeshi Godai (former manager of the Panasonic speaker manufacturing factory) established Onkyo in april 1946 with the intention of addressing what he felt was a lack of satisfactory Japanese-made dynamic speakers. The word “onkyo” means “sound acoustics” in Japanese, and is the origin of a bold, simple, and concise brand image - Osaka Denki Onkyo K.K.

Onkyo unveiled the Grand Scepter GS-1 in 1984, an all-horn-scheme speaker system designed by Hiroyuki Yoshii that was emblematic of the company’s ongoing pursuit of ultimate sound. The speaker was based on completely new theories of audio design and measurement and was evaluated highly in both domestic and overseas markets. An equally impressive power amplifier, the Grand Integra M510 was also introduced in 1984 as a partnering component. In 1991, a few years after its initial release, Hi-Fi professionals in France selected the GS-1 as recipient of the Joseph Leon Award. The Grand Scepter GS-1 has an all-horn configuration. The horn-loaded speaker has the characteristic of having good transient characteristics in principle, but it also has the disadvantage of having distortion in many time domains (multipath ghost distortion, reverb distortion, etc.). At Onkyo, theoretical analysis revealed that the horn-loaded horn type has very little high-order harmonic distortion in principle compared to other methods, and the ideal speaker system is realized by complete control of the horn-loaded horn speaker over a long period of time. Research and development was carried out. Multipath ghost distortion and reverb distortion are not necessarily unpleasant distortions, so they were sometimes used to create sounds, but Gran Scepter eliminates these distortions for the correct expression of music. Technical data: 2-way, 3-speaker, all-horn system | Power 300W (EIAJ) | Peak power 2000W | Frequency range 20Hz-20kHz | Impedance 8ohm | Dimensions: 630*1060*615 mm | Weight: 117kg.


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03 April 2021

YAMAHA GF-1 (1991) - Pure Beryllium and Active

 

active loudspeaker

The GF-1 from 1991 came to be known as an active speaker encapsulating an active crossover and a drive amplifier directly connected one-to-one with all speaker units. It was the culmination of the Yamaha HiFi speaker technology. It was designed with a two-part configuration (140 cm tall and 150 kg total) with the upper half housing a three-way speaker element and the lower half a YST superwoofer element. Its four drive amplifiers and active crossover units per channel were attached as four independent modules to the back of the superwoofer, and with a massive external power supply that itself weighed 25kg supplying each of the four amplifier modules with independent power it was a truly heavy piece of equipment. The crossover slope and cutoff frequency were completely fixed and could not be adjusted from the outside in any way, with only fine adjustments of up to ±2.5dB to each module’s input level available to the user. From this it can be seen that the developers intended the system to be perfectly tuned and did not intend the balance to be changed easily.

The 3 cm tweeter and 8 cm midrange were of course made of pure beryllium, but rather than using the vacuum deposition process of the past it went as far as using a forged beryllium dome developed for and used in only this model. Its pair of large and small woofers (27 cm bass and 30 cm YST sub-bass) likewise used a Kevlar cone and forged beryllium cap specific to this model, and the magnet utilized a voice coil with reduced diameter and dendritic crystal aluminum-nickel to lighten the motion of the diaphragm system. The tweeter and midrange magnets were also composed of dendritic crystal aluminum-nickel. The gold deposition method was performed on each unit’s diaphragm in an effort to damp the slight squeal of beryllium and produce uniform tone across all units. Overall it was built like it was meant to be the crowning glory, and if there was just one thing left undone it would probably be that it was not possible to use a forged beryllium woofer cone. As Yamaha’s speaker development changed course for a new era of focus on the home theater, the GF-1 put a period at the end of the pure beryllium development story that had played out since the NS-1000M.

In 1992 a dedicated 100W/ch Class A power amplifier, the GFD-1, with external power supply was introduced to complement the GF-1 loudspeaker. It featured a 6-position source selector and a 23-position rotary attenuator. It's construction made possible to be used with any passive loudspeaker not just the Active GF-1.


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