Unconventional Audio Designs!

HIFI ROSE RA180 INTEGRATED AMPLIFIER

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SPECIFICATIONS
Amplifier Output

  • 4Ω – 200 W x 4 Ch (800 W)
  • 8Ω – 200 W x 4 Ch (800 W)
  • BTL Mode On – 400 W x 2 Ch (800 W)
Input Sensitivity
  • Balanced Inputs – 500mV (200 W x 4 Ch)
  • Unbalanced (Line 1,2,3) Inputs – 500mV (200 W x 4 Ch)
  • Phono (MM / MC) Input – 5mV / 0.5mV (200 W x 4 Ch)
Input Impedance
  • Balanced Inputs – 44kΩ
  • Unbalanced (Line 1,2,3) Inputs – 47kΩ
  • Phono (MM / MC) Input – 47kΩ
Bandwidth (0dBr + / – | 8Ω)
  • Speaker Output – 12Hz – 100Khz (@1W x 2Ch)
  • H/F Speaker Output – 12Hz – 100Khz (@1W x 2Ch)
Frequency Response (1W, +/- 1dB | 8Ω)
  • Speaker Output – 12Hz – 100Khz (@1W x 2Ch)
  • H/F Speaker Output – 12Hz – 100Khz (@1W x 2Ch)
Total Harmonic Distortion
  • Balanced & Unbalanced (Line 1,2,3) Inputs – 0.005% (100W) (@200W x 4Ch)
Damping Factor
  • Speaker & H/F Speaker Outputs – >150 (@200W x 2Ch)
Signal-to-noise-Ratio (S/N)
  • Balanced / Unbalanced / Phono MM – 102dB / 79db (@200W x 4ch)
Output Impedance
  • Speaker Output – 40mΩ (200W x 4ch)
Subsonic Filter with On/Off Switch
  • -3dB – 50Hz (1W x 4ch)
Tone Control with On / Off Switch
  • Bass (100Hz) / Treble (10KHz) – +/- 15dB (1w x 2ch)
X-Over with On/Off Switch
Too Sexy! :D
 

Panasonic RS-296US (1972)​


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Panasonic rolled out its 20-cassette carousel player in time for Christmas 1972 at a retail cost of US $179 (or the equivalent of US $1,100 today). It wasn’t the first multi-cassette player – Denon, Phillips, Pioneer and others had already manufactured players that loaded multiple cassettes along linear tracks – but most of these had been marketed primarily for commercial use – retail stores, supermarkets and the like.

Panasonic was taking a direct stab at the home market with the RS-296US, and a big stab at that: Not only was the 20-cassette capacity larger than anything previously offered, but at 40 pounds, it was one heavy piece of hi-fi equipment. It promised the ability to play continuous music for two-and-a-half days when programmed correctly – provided the cassettes you inserted were 90 minutes in length and you programmed the device to play through the entire carousel twice.

The RS-296US worked by pulling cassettes down into the machine where the actual cassette-playing apparatus was encased. Once the cassette was inside, the tape could be rewound or fast-forwarded manually, if so desired. At the end of the first side, the apparatus would play the cassette’s second side before ejecting the tape back to its place in the carousel. The carousel would then rotate to the next cassette it had been programmed to play, and the whole process would begin again.



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Panasonic RS-296US (1972)​


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Panasonic rolled out its 20-cassette carousel player in time for Christmas 1972 at a retail cost of US $179 (or the equivalent of US $1,100 today). It wasn’t the first multi-cassette player – Denon, Phillips, Pioneer and others had already manufactured players that loaded multiple cassettes along linear tracks – but most of these had been marketed primarily for commercial use – retail stores, supermarkets and the like.

Panasonic was taking a direct stab at the home market with the RS-296US, and a big stab at that: Not only was the 20-cassette capacity larger than anything previously offered, but at 40 pounds, it was one heavy piece of hi-fi equipment. It promised the ability to play continuous music for two-and-a-half days when programmed correctly – provided the cassettes you inserted were 90 minutes in length and you programmed the device to play through the entire carousel twice.

The RS-296US worked by pulling cassettes down into the machine where the actual cassette-playing apparatus was encased. Once the cassette was inside, the tape could be rewound or fast-forwarded manually, if so desired. At the end of the first side, the apparatus would play the cassette’s second side before ejecting the tape back to its place in the carousel. The carousel would then rotate to the next cassette it had been programmed to play, and the whole process would begin again.



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From where do you fish out such exotic stuff 😮
 
Even more crazy stuffo_O
Precision engineering not any crazy DIY idea

Another Omni. Anyone has one?
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Precision engineering not any crazy DIY idea
Unlike other designs, this was an intelligent design which definitely wouldn't have costed a bomb. It's a simple design. Kind of a neat jugaad. In the 70s and 80s, Philips were known for cost effective high quality products. Even Philips India made good products. Be it a battery eliminator, voltage stabilizer the transformers inside had impeccable quality. Their mid hifi systems, transistor radios, cassette players were popular in India. My grandfather had a valve radio and IIRC it had the label "Philips of Holland"
 
Rethm Saadhana



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Specifications:

  • Full range driver: Custom designed 7 inch cone w/whizzer
  • Horn loaded labyrinth: 2.2m (7"- 4") length
  • Bass drivers: Custom designed (3 units per enclosure) 6.5 inch cones
  • Bass sealed isobaric chamber: 18.4 lit. volume
  • Bass labyrinth: 1.4m (4'-8")
  • Bass module amplification: one monoblock per enclosure (FET amplifier)
  • Bass amp max. output: 210 pc @ 4 ohms.
  • Loudspeaker sensitivity: 102 db/w/m
  • Nominal impedance: 8 ohms
  • Frequency response: 18 Hz to 20 KHz
  • Minimum amplification power: 2 wpc
  • Dimensions: H x D x W : 1040mm (3'-5" )x 730mm ( 2'-4 ½" ) x 215mm (8.5" )
  • Weight per enclosure: 40 kg ( 88 Ibs)

Jadis Eurythmie

Description:
4-way hybrid horn/dynamic-driver loudspeaker system.
Crossover frequencies: 180Hz, 700Hz, 7kHz.
Peak power handling: 70W.
Sensitivity: 103dB/W/m with bi-amplification, above 180Hz, 96dB/W/m with mono-amplification.
Dimensions: 59" (1500mm) H by 27.5" (700mm) W by 27.5" (700mm) D. Weight: 176 lbs (80kg).
Price: $37,000/pair (1996); no longer available (2012)
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Symbol Audio - Modern Record Console
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300W 8″ Powered Subwoofer - Concealed in the natural steel pedestal is a 300 watt powered 8″ subwoofer with dedicated gain, phase, and frequency controls
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SPECIFICATIONS:
Amplifier:

-Hand wired Ultra-linear tube amplifier
-Phono, streaming, and auxiliary inputs
-Line-level output
-15 watts per channel stereo
-Frequency Response (1W): 15Hz-30,000Hz +/- 1dB
-Frequency Response (full): 20Hz-25,000Hz +/- 1dB
-Distortion (1W): < 0.3%
-Distortion (full): <3%
-S/N Ratio: 85dB
-Tube Compliment: 12AU7 x 2, EL84 x 4

Turntable:
-Unique 3 phase suspension system isolates plinth from console cabinet
-Quiet running AC motor decoupled from the plinth to reduce vibration transmission
-Resonance-Optimized platter made from MDF with an integrated vinyl mat
-Stainless steel axle with Teflon bearing in a sintered bronze housing
-Central Metal Ballast optimizes center of gravity and damps main bearing
-Factory mounted Sumiko Blue Point No. 2 high-output moving coil cartridge
-Carbon-fiber headshell and armtube with conical design avoids standing wave reflections
-High-purity copper internal wiring from the headshell to gold-plated phono sockets
Speakers:
-Full-range 6.5” driver with felt diffraction ring
-Dual cone design with integrated dustcap-wizzer assembly
-Stiff lightweight hemp paper cone with treaded and pleated accordion fabric surround
-Ported enclosure with 3-layer construction for resonance mitigation
-Open vented cast-aluminum basket for reduced back wave bounce back and improved cooling
-Powerful AlNiCo motor
-8ohm 93dB SPL 1W/1M
Subwoofer:
-8” driver with oversized surround
-Stiff lightweight hemp paper cone
-Vibration damped, vented metal basket
-Sealed enclosure with 3-layer construction for resonance mitigation
-Frequency Response: 26Hz-160Hz -3dB
-Integrated 300W amplifier with fully variable gain, low pass, and phase adjustment
Platinum Audio - Air Pulse 3.1 (1997)
Phil Jones created the Airpulse speaker range to push the boundaries of speaker technology as well as challenge traditional ideas of speaker design. Today, Airpulse is designed to bring hifi audio into the homes of music lovers worldwide.

The culmination of Phil's extensive career came in 1996 when he designed and produced the iconic Air Pulse 3.1 loudspeaker system. Praised by Japan Audio Society for its genius design, he was awarded the Golden Sound Award for best loudspeaker developed in a 100-year history of loudspeakers. These speakers stand over 7ft tall, weighs more than 1,200 lbs. per speaker and costs $275K per pair. A total of 10 sets have been sold to date.

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Specifications:
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Platinum Audio - Air Pulse 3.1 (1997)

Phil Jones created the Airpulse speaker range to push the boundaries of speaker technology as well as challenge traditional ideas of speaker design. Today, Airpulse is designed to bring hifi audio into the homes of music lovers worldwide.

The culmination of Phil's extensive career came in 1996 when he designed and produced the iconic Air Pulse 3.1 loudspeaker system. Praised by Japan Audio Society for its genius design, he was awarded the Golden Sound Award for best loudspeaker developed in a 100-year history of loudspeakers. These speakers stand over 7ft tall, weighs more than 1,200 lbs. per speaker and costs $275K per pair. A total of 10 sets have been sold to date.



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Specifications:

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What really stands out is the power handling capacity - 10,000W!!!

I shudder to think what the amplifier would be like.
 
SETRON (WELTRON) 2005 SPACE ODYSSEY STEREO SYSTEM
Super-rare and sought after, this space age stereo unit was launched in 1973 by U.S. electronics company Weltron. Model 2005 was part of a range entitled “The New Shape of Sound”, inspired by the moon landings and Stanley Kubrick’s 2001: A Space Odyssey.

Housed in a flying-saucer shaped white ABS plastic casing, the unit comprises:
- 45/33/78 rpm auto record-changing BSR turntable in good working order
- FM/AM radio in good working order with green and blue psychedelic circular console light
- 8-track cassette player (untested)
- Internal stereo speakers in good working order

White ABS plastic casing in excellent condition. Top section lifts off for display or play without lid. Original smoked plastic hinged lid in good condition considering these are usually broken or missing. There is a single crack close to the hinge, as pictured. Hinge is not sprung.

Original four castor ball feet all present, enabling the unit to be pushed round tabletop or floor with ease, plus push in rod which releases a rubber stopper to stabilise.

Weltron was based in Durham, North Carolina. In other countries they re-badged their products and distributed through well-known brands for that region. In Singapore under the Setron brand, the UK under the Prinzsound brand, in Canada the Fleetwood brand, and in Australia the GEC brand.

Unit measures approx 23”/58cm in diameter and 10”/23cm in height. Weight approx 13kg
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Clairtone Project G

The Clairtone Project G stereo was produced by Clairtone from 1964-67. Costing 2000$ new (approximately the equivalent of $20,000 today) the high price kept it from becoming a huge success. Despite it sounding and looking incredible, fewer than 400 Project G's were made. It was promoted by Frank Sinatra, Hugh Hefner, Oscar Peterson and other celebrities and found a niche within Hollywood and other trendsetters popping up on the sets of such movies as The Graduate, The Party and Zabriskie Point. Clairtone's co-founder, Peter Munk once quipped that, "The prime minister had one and if the local truck driver didn't have one, he wanted one."
It has gone on to become a Canadian design icon.
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Brionvega RR126 (1966)

This radiogram is a musical pet, or at least that’s how it was described when it appeared in Italy in 1966, the product of the imaginations of the Castiglioni brothers, Achille (1918-2002) and Pier Giacomo (1913-1968).
The Brionvega RR126 is an icon of Pop design. It was conceived as an anthropomorphic ‘musical pet’, with speakers for ears and control dials for its face. It could be moved around easily on its castors, allowing it to operate in concert with other informal 1960s furniture (for example, inflatable furniture such as the Blow Chair). It is made from plywood covered with a white plastic laminate. The stand is cast aluminium, painted black except on the leading edges, and its wheels are rubber. The turntable was made by Garrard.

The system’s elements could be arranged in three different ways: speakers on top; speakers hooked to the sides; speakers separated from the main unit. The ability of the RR126 to be rearranged at will provided a fashionable, witty, Pop-inspired piece of furniture, but it also allowed its user a degree of control over the device’s audio output. When the speakers were stacked on top, it meant that only the radio could be used and that stereophonic sound was less effective. In this configuration, the turntable was concealed, fitting into recesses on the underside of the speakers. When they were attached to the sides, the record player was then accessible, and the stereophonic output more obviously effective at greater distance from the unit. The final configuration placed the speakers away from the main body, achieving optimal stereo sound quality. This attention to sound quality is characteristic of the period in which the RR126 was designed. In the mid-1960s, pop music pioneers such as the Beatles and the Beach Boys began to experiment seriously with complex layered song arrangements, which demanded playing on high-quality audio equipment to appreciate the complexity and richness of sound production.
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Brionvega TS502 (1963)

From the late 1950s, several noteworthy Italian designers became interested in the inherently plastic (i.e mouldable) quality of plastics. These designers strove to celebrate man-made plastics as a group of materials with unique aesthetic and physical characteristics, to try to change the widespread perception of plastics as being cheap, shoddy and useful solely to imitate more expensive natural materials.

The box-like Brionvega TS502 radio was designed jointly by Marco Zanuso (1916-2001) and Richard Sapper (born 1932), who had gone into partnership in the late-1950s. The gleaming yellow ABS plastic shell folds open halfway along its length, allowing access to all of its controls. It is powered by six batteries, its portability and visual softness associates the TS502 with informal 'Pop' interiors of the 1960s, while also granting it a sense of intrigue and surprise.
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Radio.cubo 50° (2022)
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Panasonic Audio Eggs (1972)​

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This gem from the early 70s ran with the tagline “stereo lays an egg” and combined the iconic egg chair with an inbuilt stereo system for the ultimate in kitsch home interiors.

It may be a flashback but a quick look through any cool design mag shows that the Panasonic Audio Egg would have no trouble finding a home today. With deep-pile fake fur, volume control at your fingertips, convenient swivel action and even a high-intensity lamp, you could pretty much set up camp in this womb-like egg and never leave!

Swinging 70s hipsters also had the option of choosing a romantic love-seat model for two, so they could share their plush chamber. Advertising from the era offered consumers padded ottomans, a range of Panasonic stereo options and even a “Playboy Club” discount for the man about town.
 
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