Grundig Studio 150 (ST-150) + Elac Miracord 625 (manual & diagrams), 1970-1973, made in Germany

Link: radiomuseum | Grundig HiFi-Box 306 Compact

Studio 150 HiFi Stereo
HiFi according to DIN 45500 standards

Power 2X30 Watt music
Keyboard with 8 control keys
27 Transistors + 8 diodes + 1 rectifier
Frequency response 20. . . 35,000 Hz
Disc changer 625 with magnetic head
Built-in preamplifier for the magnetic head of the changer
Stereo headphone jack. for tuner, for wire melter and recorder
Sockets for speaker boxes
Mobile in satin metal and black bands
Dimensions approx. 55 x 32 x 18 cm

Grundig CN720 Kassetten-Tonbandgerät HiFi-Stereo DNL automatic (manual & diagrams), 1973-1974, made in Germany

Link: radiomuseum | radiomuseum-bocket

Country: Germany
Manufacturer / Brand: Grundig (Radio-Vertrieb, RVF, Radiowerke)
alternative name Grundig Portugal || Grundig USA / Lextronix
Year: 1973–1977

Category: Sound/Video Recorder and/or Player
Semiconductors (the count is only for transistors) 40:
Main principle Audio-Amplification
Wave bands - without
Details Cassette-Recorder or -Player
Power type and voltage Alternating Current supply (AC) / 110; 120; 220; 240 Volt
Loudspeaker - For headphones or amp.
Power out
Model: CN720 HiFi-Stereo DNL - Grundig Radio-Vertrieb, RVF,
Material Modern plastics (no Bakelite or Catalin)
Shape Tablemodel, with any shape - general.
Dimensions (WHD) 240 x 110 x 260 mm / 9.4 x 4.3 x 10.2 inch
Notes

• Grundig Cassetten-Tonbandgerät CN720 HiFi-Stereo DNL.
• Abschaltbare Stereo-Aufnahmeautomatik, für Sprache oder Musik umschaltbar; eingebaute, schaltbare DNL-Schaltung. Übertragungsbereich: 30-12500 Hz mit Eisenoxydband, 30-14000 Hz mit Chromdioxydband. 

Net weight (2.2 lb = 1 kg) 3.1 kg / 6 lb 13.3 oz (6.828 lb)
Source of data Katalog RFP 1973
Mentioned in Handbuch VDRG 1975/1976 (und 1976/77)

Westra OT-57-148 8Ohm, made in Germany

Produktdetails Lautsprecher HKM OT-57-148
Impedanz: 8 Ohm
Frequenzbereich: 1000...20000 Hz
Nennleistung: 80 W (* über Frequenzweiche)
SPL 1W/1m: 88 dB
fs: 1000 Hz
Re: 6,8 Ohm
Le: 0,2 mH
Qms: 4,6
Qes: 6,4
Qts: 2,6
Sd: 16,6 cm²
Gewicht: 100 g
Magnet: 1 oz
Spulen-Ø: 13 mm
Einbau-Ø: 53 mm
Gesamtmaße: 58,5x58,5x31 mm
* Crossover Highpass 6000 Hz

Telefunken HP 840T 3-Wege Boxen, 1991, made in Germany

Link: radiomuseum

Monacor SA-600 Solid State Stereo Amplifier [Prinzsound SA-2001], 1969-1974, made in Japan

Link: hilberink | hifi-wiki | radiomuseum | usermanual [PDF] | schematic diagram [PDF]

Country: Germany
Manufacturer / Brand: Monacor, Bremen
Year: 1974 ?

Category: Audio Amplifier or -mixer
Semiconductors (the count is only for transistors) 18: 2SC900 2SC900 2SC900 2SC900 2SC900 2SC900 2SC945 2SC945 2SC853 2SC8532SC853 2SC853 2SA545 2SA545 2SC255 2SC255 2SC255 2SC255
Main principle Audio-Amplification
Wave bands - without
Details
Power type and voltage Alternating Current supply (AC) / 117; 220; 240 Volt
Loudspeaker - This model requires external speaker(s).
Power out
Model: Stereo-Amplifier SA-600 - Monacor, Bremen
Material Wooden case
Shape Book-shelf unit.
Dimensions (WHD) 375 x 130 x 270 mm / 14.8 x 5.1 x 10.6 inch

Price in first year of sale 399.00 DM
Source of data -- Original-techn. papers. / Radiokatalog Band 2, Ernst Erb
Mentioned in RIM - electronic `74

Specifications:

General:
    Manufacturer: Monarch / Prinzsound
    Model: SA-600 / SA-2001
    Type: Integrated amplifier
    Year of construction: 1969 - 1972
    Made in: Japan
    Color: front black, wooden case
    Power consumption: 80 W max.
    Dimensions (WxHxD): 375 x 130 x 267 mm
    Weight: 7 kg
    Original price approx: ~425 DM

Connections:
       inputs:
       Input sensitivity:
       Phono MM: 2.5 mV
       Phono ceramics: 50 mV
       Tuner: 200 mV
       AUX: 200 mV
       Tape Play 200 mV
       outputs:       Tape Rec
       Headphone
       Connections for 2 pairs of speakers

Technical specifications:
    Continuous power RMS:
        8 ohms: 2x 18 Watts
        4 ohms: 2x 22 Watts
    Dynamic performance:
        8 ohms: 2x 25 Watts
        4 ohms: 2x 30 Watts
    Total harmonic distortion at RMS: 0.5% at 8 ohms
    Damping factor: 40
    Frequency response: 15 - 60,000 Hz
    Signal to noise ratio:
        Phono: 70 dB
        High level: 85 dB
    Tone:
        Bass: ± 10 dB at 100 Hz
        Treble: ± 10 dB at 10 kHz
    Loudness: yes
    High Filter: yes
    Low Filter: yes

Special features:
    Sliders for balance, bass, treble, volume.
    Mono / stereo switch

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