MATRIX Audio X-SPDIF 24bit/192kHz USB Audio Interface DAC, made in China

Link: matrix-digi-usa

The X-SPDIF uses the X-Core 32bit/500MIPS microprocessor from XMOS. The X-Core is the most advanced USB to SPDIF converter available. It supports asynchronous USB playback up to 24bit/192kHz and is fully compatible with Windows, Mac, & Linux. Low latency ASIO/KS drivers are also supported.

The X-SPDIF is CNC machined from solid aluminum to provide complete shielding from interference. This ensures a bit perfect digital output.

The X-SPDIF has digital coaxial and AES/EBU outputs using a very high quality differential protocol line driver chip to achieve absolute signal integrity. The digital outputs are galvanic isolated from the computers USB ground to eliminate any possible ground loops.

The X-SPDIF utilizes a ultra low jitter dual-frequency clock consisting of two very high quality crystal oscillators. Since the clock has separate crystals for 44.1kHz & 48kHz all multiples of these sampling rates are perfectly and automatically reproduced (44.1khz = 88.2khz 176.4khz) & (48khz = 96khz 192khz).

Ultra low jitter is key in reproducing high quality audio and that requires an accurate and stable clock!

Polyvox (MiniMoog), Serial Number: 0986087, September 1986, made in USSR


Polivoks is the portable electronic musical synthesizer which is designed for playing different musical compositions of any genre. It is also intended for creating some musical effects in cinema and play scoring, in studio. 

There are 4 octaves on the keyboard. The inclined desk is divided into the following functional sections: Modulator, Generator #1, Generator #2, Mixer and Amplifier. They give one a possibility to synthesize a broad spectrum of sounds and to change sounding at any time. 

There are 3 internal audible signal sources in the instrument: to broad-ranged of the Generators with changed form of oscillations and a noise generator for creating a non-musical sounds such as wind, surf, whine, etc. 

Possibility to connect an external audible signal sources to the synthesizer is provided for (e.g. guitars, electropianos and electroorgans). Sounds of different external sources are combined separatly in the mixer in any ratio. There is a filter in the synthesizer with cutoff frequency control and resonance to change colour of timbre of audilble signal over a wide range. 

Engineer: Vladimir Kuzmin, designer: Olympiada Kuzmina, hardware engineer: Yuriy Pheophilov, produced by Urals Vector Company.


Mains voltage of alternating current, V220
Power consumption, Wmax 10
A range of operating temperature, C-10 / +35
Relative generator drift over 4 hours continuous work is within, %max +/- 05
Total musical range overlaped by main generators, Hz21,8 (F of subcontra octave), + 5274 Hz (E of fifth octave)
Tuning range of the main generators, %min +/- 12 (+/- 1 tone)
Detuning range of the second generator, %min +/- 25 (+/- 2 tone)
Frequency change range of the cutoff frequency of the filter, Hzmin 100 + 10000
Dynamic range of the synthesizer, dBmin 60
Inlet voltage of the synthesizer in a load 10 kOm
Low output voltage, V0,025
High output voltage, V0,25
Dimensions of the synthesizer, mm780х490х195
Dimensions of the pedal, mm273х93х52
Weight, kg< 20

This synth was made in September 1986 in USSR. Serial Number: 0986087

ITT Schaub-Lorenz HiFi Klangstrahler B6/25, 1969, made in Germany

Link: radiomuseum | itt.pytalhost

Country:  Germany
Manufacturer / Brand:  ITT Schaub-Lorenz
Year: 1969 ? Category: Loudspeaker, headphone or earphone
Wave bands - without
Power type and voltage No Power needed
Loudspeaker 3 Loudspeakers
Power out
from Model: HiFi Klangstrahler B6/25 - ITT Schaub-Lorenz
Material Wooden case
Shape Book-shelf unit.
Dimensions (WHD) 500 x 250 x 220 mm / 19.7 x 9.8 x 8.7 inch
  • 2 bass speakers and 1 treble loudspeaker
  • With 25 watt nominal load capacity
  • 4 Ω Impedance
  • Case: Precious wood veneer
  • Color: natural walnut.

Mentioned in -- Original prospect or advert

Canton LE-350 (Black), 1974, Made in Federal Republic of Germany

Link: radiomuseum
Country:  Germany
Manufacturer / Brand:  Canton, Weilrod
Year: 1974 Type: Loudspeaker, headphone or earphone
Wave bands - without
Power type and voltage No Power needed
Loudspeaker 2 Loudspeakers
Power out
from Radiomuseum Model: LE350 - Canton, Weilrod
Material Wooden case
Shape Miscellaneous shapes - described under notes.
Dimensions (WHD) 360 x 205 x 190 mm / 14.2 x 8.1 x 7.5 inch
  • 2-way hi-fi speaker with 35 watts RMS.
  • 4-8 ohms impedance.
  • Frequency response 40-25000 Hz Crossover (slope 10/14 dB): transition at 1400Hz.
  • Volume: 12.6 liter Gross.
Finish: natural walnut or polyester coating in white or anthracite. Run Gelochtes Alloy grid. High or provide cross. Suspension. 5-meter connection cable with standard plug firmly mounted.

Net weight (2.2 lb = 1 kg) 5.7 kg / 12 lb 8.9 oz (12.555 lb) 
Source of data -- Original prospect or advert

Saba Permadyn 19-200 Greencone 5298 U 8 Vintage Speaker 5 Ohm Alnico - Open Baffle, 1955-62, made in Germany

Link: troelsgravesen | radiomuseum

Country:  Germany
Manufacturer / Brand:  SABA; Villingen
Schwer & Söhne, GmbH
Year: 1962 ??
Category: Loudspeaker, headphone or earphone
Wave bands - without
Power type and voltage No Power needed
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
Power out
Model: Permadyn 19-200 5298 U 8 - SABA; Villingen
Material Various materials
Dimensions (WHD) 195 x 90 x 195 mm / 7.7 x 3.5 x 7.7 inch

Net weight (2.2 lb = 1 kg) 0.675 kg / 1 lb 7.8 oz (1.487 lb)

Rank Arena LCP 720 mkII (L720 CP mkII), 1972, made in Denmark

Country:  Denmark
Manufacturer / Brand:  Rank-Arena, Horsens
Brand Arena
Year: 1972
Category: Loudspeaker, headphone or earphone
Wave bands - without
Power type and voltage No Power needed
Loudspeaker 3 Loudspeakers
Power out 20 W (unknown quality)
Model: LCP720 - Rank-Arena, Horsens
Material Wooden case
Dimensions (WHD) 210 x 310 x 240 mm / 8.3 x 12.2 x 9.4 inch
  • 3-way hi-fi box
  • 20/30 watt
  • 4 ohms !!! (на сайте radiomuseum заявлено о 8 ohms)
  • Frequency range: 45-20000Hz.
  • Volume: 11 liters.
  • Frequency sweep transition at 1000 / 5000Hz.
  • Case in walnut, white, teak or rosewood.
  • "Power-Meter" shows at the front the controllability of the box and is intended to display and avoid overruns.

Net weight (2.2 lb = 1 kg) 5.6 kg / 12 lb 5.4 oz (12.335 lb)
Collectors' prices  
Source of data -- Original prospect or advert

По бирке модель именуется L720 CP mkII и 4 ohms !!!

Heco Professional P5000 (Revox 4641), 1970, made in Germany

Revox 4641: In einschlägigen Hifi-Foren gibt es widersprüchliche Angaben über den Hersteller der Boxen. Einige behaupten, REVOX hätte die Boxen hergestellt, andere sagen, sie seien in Lizenz von HECO gebaut worden und seien baugleich mit der "HECO Professional P5000".

Dazu ein Zitat aus
"Zweitgrößtes Modell aus der Serie P1000 - P6000/P6003 mit diversen Testerfolgen in der damals führenden HiFi-Fachzeitschrift "HiFi-Stereophonie". Die Box wurde mit gleicher Bestückung auch für die Firma Revox gebaut. Gehäuseausführungen Nußbaum natur oder Schleiflack weiß ... . 
... Bei 100% der Boxen dieser Baureihe sind heute die Originalsicken der Tieftöner bzw. Tiefmitteltöner zerstört, da sie aus Schaumstoff bestehen, ansonsten handelt es sich um langlebige und hochwertige Produkte von einem führenden deutschen Hersteller der 60er und 70er Jahre."

Link: hifi-wiki | 
Specifications / Features:
Manufacturer: Heco
Model: Professional P5000
Year of construction: 1970

Type: Passive 4-way box closed

Endurance (Nominal / music): 50/70 W
Frequency response: 25-25000Hz
Transition frequencies 250/800 / 3000Hz (12dB)
Impedance: 4 - 8 ohms
  • Woofer: 1 x 245mm
  • Woofer: 1 x 130mmm
  • Tweeter: 1 x 37mm calotte (tissue)
  • Tweeter: 1 x 25mm calotte (tissue)
Dimensions: mm (H x W x D) 600x320x250mm
Weight: 20 kg
Original price approx .: 746, - DM
Made in Germany
Design as P-series
DIN connectors
Predecessor of the x001 and X302 P / P X302 SL series

Серийные номера рядом: #2429, #2431 (при этом корзины НЧ динамиков  одинаковые, а вот цвет корзин разный. :0))

Second largest model in the series P1000 - P6000 / P6003 with various test successes in the leading HiFi magazine "Hi-Fi stereophonic". The box was built with the same placement for the Revox. Housing versions walnut natural or lacquered not know removable front grille, made of anodized aluminum perforated plate. Rear wall sealed. Preparation for the pedestal FG 250th
At 100% of the boxes in this series, the original beads of the woofers and midrange speakers today are destroyed because they are made of foam, otherwise it is durable and quality products from a leading German manufacturer of the 60s and 70s.

Grundig HiFi Lautsprecher Box 525, 1969-72, made in Germany

Link: radiomuseum | Grundig HiFi-Studio-Serie 1970 | Grundig Hifi-Studio-Serie 1970/71 | Grundig Zubehör Katalog 1969

Country:  Germany
alternative name Grundig Portugal || Grundig USA / Lextronix
Year: 1969–1972
Category: Loudspeaker, headphone or earphone
Wave bands - without
Power type and voltage No Power needed
Loudspeaker 4 Loudspeakers
Power out 35 W (50 W max.)
Model: HiFi-Box 525 - Grundig Radio-Vertrieb, RVF,
Material Wooden case
Dimensions (WHD) 580 x 240 x 240 mm / 22.8 x 9.4 x 9.4 inch
  • HiFi-Lautsprecher-Box 525
  • 2-way system with 4 speakers
  • 2 woofer 204mm - tuning coil 37mm
  • 2 dome tweeter 115 × 75 mm - vibration coil 25mm
  • Pickup frequency of the switch 3,500Hz
  • Frequency response 40-20000 Hz
  • Impedance 4 Ohm
  • Connection for Grundig ball radiators.
  • Color variants: walnut natural matt, teak natural, rosewood matted
  • Price 360, - DM
                  Net weight (2.2 lb = 1 kg) 15 kg / 33 lb 0.6 oz (33.04 lb)
                  Price in first year of sale 345.00 DM
                  Collectors' prices  
                  Source of data Handbuch VDRG 1970/1971

                  Mentioned in -- Original prospect or advert (Grundig Katalog 1969/70 und 1970)

                  Saba hi-fi Box 800F (Natural walnut), 2-way closed system 1970s, made in Western Germany

                  Link: hifi-wiki

                  Specifications / Features:
                  Manufacturer: SABA
                  Model: 800F
                  Years of construction: 1970
                  Color: Natural walnut, matt white
                  Type: 2-way closed
                  Woofer: 1x 150x220 mm
                  Tweeter: 1x 110 mm (5 Ohm)

                  Endurance (Nominal / Musikb.): 12/15 W
                  Frequency response: 60 to 16,000 Hz
                  Transition regions:
                  Impedance: 4 ohmsDimensions: 390 x 220 x 205 mm (HxBxT)
                  Weight: 4.4 kg
                  Original price approx .:
                  Made in Germany

                  Telefunken TLX 22 / 4 Professional, 1972, made in Western Germany

                  Link: radiomuseum

                  Country:  Germany
                  Year: 1972 ?? Category: Loudspeaker, headphone or earphone
                  Wave bands - without
                  Power type and voltage No Power needed
                  Loudspeaker 3 Loudspeakers
                  Power out
                  Model: TLX-22 Professional - Telefunken Deutschland TFK,
                  Material Wooden case
                  Shape Book-shelf unit.
                  Dimensions (WHD) 290 x 450 x 230 mm / 11.4 x 17.7 x 9.1 inch
                  • Rated load capacity 90 watts
                  • Music power 150 watts
                  • High-frequency adjustment, light-emitting diode for overdrive indication.

                  Mentioned in Original Telefunken Servicew Unterlagen

                  Sony CDP-D500 Professional Compact Disc Player, 1996-2000, made in Japan


                  The CDP-D500 is a professional CD player ideally designed to fit into production applications with features such as a jog/shuttle knob and cue standby for precise cueing, external word sync input, front panel direct rack access, AES/EBU and SPDIF digital out.

                  Отдельный независимый формирователь SPDIF

                  Specifications / Features:
                  • Disc format: CD
                  • Digital converter: 2 x PCM1702-J
                  • CD Mechanism: KSS-213B
                  • Jog Shuttle Dial
                  • Cue to either TRACK or INDEX
                  • Cue/Standby mode
                  • Direct track access on front panel
                  • Lock to external digital word clock
                  • Adjustable Auto Fade on front panel
                  • Adjustable Auto Fade In/Out 1
                  • Accommodates both 8cm (3-inch) and 12 cm (5-inch) compact discs
                  • Built-in digital outputs conforming to the AES/EBU and unbalanced (IEC-958) formats
                  • Built-in DIN 8-pin remote control connector
                  • Auto cue playback
                  • Variable speed playback (+ 12.5% in 0.1% steps)
                  • Various playback modes
                  • 19-inch rack mountable
                  • For CD frame accurate cueing
                  • For rapid start from a point where modulation is detected on the disc
                  • Including programmed playback, delete playback, etc.
                  • Enables fader start/stop from a mixing console
                  • Frequency Response: 5Hz-20kHz(+0.3dB at 10kohm Load)
                  • Signal-to-Noise ratio: More than 100dB(20kHz LPF IHF-A Weight)
                  • Dynamic Range: More than 98dB
                  • THD/Total harmonic distortion: Less than 0.004%(at 1kHz 0db 20kHz LPF)
                  • Channel Separation: More than 100dB at 1kHz(20kHz LPF)
                  • Remote Interface: Parallel DIN 8 pin (2 mode)Serial RS232C(D-sub 9-pin)
                  • Analog Output Impedance: XLR-3100 ohmRCA Pin-200 ohmH.P. Phone 150 ohm
                  • Load Impedance: XLR-10k ohmRCA-10k ohm
                  • Max Output Level: XLR±24dBS, RCA±9dBs
                  • Adaptable Load Impedance: AES/EBU(XLR-3) 110ohmIEC958(RCA Pin) 75ohm
                  • Digital Output Impedance: AES/EBU(XLR-3)35ohm, IEC958(RCA Pin)75ohm
                  • Word Sync Input Impedance: (BNC) Input 22kohm/75ohm Switchable
                  • Input Level: 2V p-p
                  • Lock Range: 44.1kHz + 12.5% (38.59kHz~49.6kHz)
                  • Dimensions: 19" x 5 3/4" x 14" / 482 x 145 x 355mm
                  • Weight: 15 lbs, 3 oz  / 7.2kg
                  • Power consumption: 16W
                  • Accessories: remote commander (Sony Remote RM-D505 For CDP-C500 CDP-C401)

                  Related Catalogues
                  Professional Audio

                  Pioneer PD-9300 [PD-71] Compact Disc Player, 1989, made in Japan

                  Link: hifiengine

                  Disc format: CD
                  Digital converter: 2 x PCM58P-K
                  CD Mechanism: PWY1006
                  Frequency response: 2Hz to 20kHz
                  Dynamic range: 99dB
                  Signal to Noise Ratio: 112dB
                  Channel separation: 108dB
                  Total harmonic distortion: 0.002%
                  Line output: 2V
                  Digital outputs: coaxial, optical
                  Dimensions: 420 x 320 x 127mm
                  Weight: 8.5kg
                  Accessories: remote control
                  Year: 1989

                  service manual

                  Technics SB-X3 Linear Phase Speaker System, 1978-79, made in Japan

                  Link: audio-heritage | hifiengine

                  39,500 (1 unit, around 1978)

                  A medium-sized speaker system of the SB-X series which realized the bookshelf type and linear phase design.

                  In order to realize Linear Phase theory in a bookshelf type, the SB - X series adopts a conical horn, and the midrange and the tweeter are withdrawn from the baffle surface.
                  In addition, the low range of each unit is smoothly enhanced by this conical horn, and low frequency distortion is also reduced by restraining this by a network, realizing low distortion of the system.

                  20 cm cone type Woofer is carried in low-pass.
                  This unit is a wide area unit with a high range extended to 5 kHz, and it has a high resistance tolerance design with heat resistance temperature of 200 ° C.

                  The 9 cm cone type mid range is carried in the mid range.
                  We are trying to reduce distortion by adopting a conical horn and also to improve the linearity at large amplitudes by paying attention to the shape and material of the edge and the material of the damper.

                  To the high region 2. The 5 cm dome type tweeter is carried.
                  The diaphragm adopts 15 micron ultra-thin titanium diaphragm, realizing high frequency characteristics and broadband. In addition, due to the ultrathinization, we added soft dome-like properties to the metal dome, and we are getting a good reverberation sound while suppressing peak occurrence.

                  In addition, the voice coil has heat resistance effect, adopting aluminum bobbin with good heat conduction, and realizing heat resistant temperature of 200 ℃ with heat resistant polyamide adhesive layer and polyester insulation layer.

                  Polyamide excellent in heat resistance is used for the voice coil adhesive layer of each unit, and polyester is used for the insulation layer. With this, we have obtained heat-resistant temperature of 180 ℃ ~ 200 ℃, achieving high resistance to input design.

                  Continuously variable attenuator is adopted as mid range and tweeter.
                  In addition, the tweeter is equipped with a thermal relay that protects the voice coil from excessive input.

                  Bass-reflex system is adopted for enclosure.
                  In addition, the front baffle has been decorated with silver metallic finish. I = 13> Bass reflex system is adopted for enclosure. In addition, the front baffle has been decorated with silver metallic finish. I = 13> Bass reflex system is adopted for enclosure. In addition, the front baffle has been decorated with silver metallic finish.

                  method 3 way · 3 speaker · bass reflex system · book shelf type
                  Used unit
                  • For low-pass: 20 cm cone type For 
                  • mid range: 9 cm cone type For 
                  • high region: 2.5 cm dome shape
                  Frequency Response 42 Hz to 20 kHz - 10 dB
                  Impedance 6 Ω
                  Output sound pressure level 89 dB / W / m
                  Permissible input
                  • 70 W (peak input) 
                  • 40 W (DIN RMS)
                  Crossover frequency 1 kHz, 3.5 kHz
                  External dimensions Width 280 × height 537 × depth 256 mm (with net)
                  weight 11.5 kg (with net)