Infrequent Sound [sex.tex] technology: июля 2014

Tape delay, unknown manufacturer and model. Supposedly made in Poland

Tape delay, unknown manufacturer and model. Supposedly made in Poland.
Bought on eBay in April of 2014, seller resided in Lodz, Poland.

Research on the internet have returned nothing about manufacturer. On the front plate it's printed "eMs" in bold, black letters and further to the right, "fix" in yellow cursive script followed by the symbol "®".
Also there's no indication of country of manufacture other than the sellers claim it's Poland and the fact that most of the internal components are known brands from Poland. Identified components are:
- Power transformer: ZATRA
- Motor: TONSIL (model: SAZ-05A)
- Capacitors: ELWA (Poland), MIFLEX (Poland), DUCATI (Italy), FECON (???)

Basically I'd like to get whatever info anyone has got on this unit, but mainly I'm interested in:
- A confirmation that it actually is polish,
- Any info on the manufacturer.
- Approximate time of manufacture.
- Schematics would be interesting, but my hopes are low here.

Any info can be sent to dusa@akultur.org

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Studer Revox Forum B mk1 3-Weg HiFi-Box, 1983, made in Germany

Link: hifi-wiki | radiomuseum

Generally

Manufacturer: Revox
Model: B Forum
Made in: Germany
Color: real wood veneer walnut, dark stained
Dimensions: 320 x 510 x 325 mm (WxHxD)
Weight: 14.7 kg
Selling Price in Germany: 1600 DM/1983

Specifications

Type: 3-way
- Woofer: 260 mm
- Midrange: 38 mm (dome)
- Tweeter: 19 mm (dome)
Load (Nenn-/Musikb.) : 90/120 W
empfolene amplifier power: 20-100 watts (RMS per channel)
Distortion: 0.5%
Transition regions: 33-24000 Hz
Crossover frequencies: 820/2600 Hz
Level controls Mid Level at 1kHz: 14/18 dB / oct.
Level controls High level at 10 kHz: 24/28 dB / oct.
Overload Protection: Overload protection of the tweeter by fuse
Connection: slide clamps
Impedance: 4 Ohm

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JBL 4406 Monitor Studio, 1986-98,

Link: Owner's Manual [PDF] | audio-heritage

\ 63,000 (1 unit, released in 1986)
\ 56,000 (1 unit, around 1998)

New 44 series small speaker system developed as the next generation monitor series.

The 17 cm cone type Woofer is carried in low-pass.
A special polypropylene cone is adopted as a diaphragm, and low distortion is aimed at by laminating a high polymer composite material on a pulp base. Moreover, by using the SFG magnetic circuit for the magnetic circuit, smooth energy response and improvement of the input resistance are realized.

Dome type tweeter is carried in the high region.
Pure titanium is used for the diaphragm of this unit, and it is molded into a dome of 25 micron thickness with original technology and it is carried. In addition, by combining a diamond edge pattern and a reinforcing rib that gave a hint to Japan's origami workmanship, we have acquired superior characteristics up to 27 kHz ultra high region without sacrificing efficiency.

Bass-reflex system is adopted for enclosure.

method 2 way · 2 speaker · bass-reflex system · book shelf type
Used unit For low-pass: 17 cm cone type / For high region: dome shape
Frequency characteristic 55 Hz to 20 kHz
Impedance 8 Ω
Output sound pressure level 87 dB / W / m
Permissible input 75 W (continuous program)
Crossover frequency 3 kHz
External dimensions Width 245 × height 390 × depth 227 mm
weight 7.7 kg