

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.
H.H. Scott '59
The Audiorama speaker system has a nominal impedance of 4 Ω and can therefore be connected to the correspondingly marked sockets of any Grundig amplifier or radio tuner amplifier. If you shouldwant to connect the Audiorama speakers to instruments of other makes, please make sure that the nominal output impedance of these latters is not higher than 5 Ω as to avoid damage of the output transistors of these instruments.
Due to the fact that the Audiorama speakers are beaming in all directions, little restriction is placed on the positioning of the speakers and the listener may be seated almost anywhere in the room without impairing the stereo effect. You only should assure that the distance between the speakers is between 2 and 4 meters, according to the size of the room. At larger or smaller distances the stereo effect may be impaired.
Technical Data Audiorama 7000
Loudspeakers: 4 woofers, 8 tweeters
Volume: approx. 11 litres
Music power: 70 W
Nominal power: 50 W
Frequency range: 45 - 20,000 Hz
Impedance: 4 ohms
Crossover frequency of built-in filter: 3500 Hz
Firmly fixed connecting cable, plug acc. to DIN 41 529: approx. 6 m long, with
Diameter of speaker ball: approx. 310 mm
Height of speaker stand: approx. 550 mm
Full lenght of chain: approx. 930 mm
Weight of speaker ball (without stand and chain): approx. 13,5 kg
The Audiorama speaker system has a nominal impedance of 4 Ω and can therefore be connected to the correspondingly marked sockets of any Grundig amplifier or radio tuner amplifier. If you shouldwant to connect the Audiorama speakers to instruments of other makes, please make sure that the nominal output impedance of these latters is not higher than 5 Ω as to avoid damage of the output transistors of these instruments.
Due to the fact that the Audiorama speakers are beaming in all directions, little restriction is placed on the positioning of the speakers and the listener may be seated almost anywhere in the room without impairing the stereo effect. You only should assure that the distance between the speakers is between 2 and 4 meters, according to the size of the room. At larger or smaller distances the stereo effect may be impaired.
Technical Data Audiorama 4000
Loudspeakers: 2 woofers, 2 tweeters
Volume: approx. 7 litres
Music power: 40 W
Nominal power: 25 W
Frequency range: 45 - 20,000 Hz
Impedance: 4 ohms
Crossover frequency of built-in filter: 2,500 Hz
Firmly fixed connecting cable, plug acc. to DIN 41 529: approx. 6 m long, with
Diameter of speaker ball: approx. 250 mm
Weight of speaker ball (without stand): approx. 6,8 kg
MARUNI JAPAN HEADPHONES
HV-215V e HV-230V Professional Series
,,quello che ti piace ascoltare, ascoltalo più forte (anche quando gli altri dormono) e più chiaro''
La tecnologia e l'esperienza MARUNI in una serie di modelli di cuffie stereo dinamiche ed elettrostatiche
di eccezionale sensibilita e leggerezza ad un prezzo limitato. Per ascolto della musica, della voce, anche
a livello professionale.
A loudspeaker 20 cm ( 22 SPCH ) equipped with a coil at high heat dissipation and large diameter.
A dome tweeter SIARE TWG for high return at the same time a very high quality in high frequency.
Tweeter TWG has all the characteristics of TWK with a lower resonant frequency, a response curve and power more extensive. Allows you to adapt to all types of speakers. A system of internal damping can finally get a response curve very linear in all the extension of the high range.
Diameter: 110 mm
Oppening baffle: 66 mm
Induction flux: 13,000 gauss
Bandwitch: 3,5 -20 kHz
Resonance frequency: 1 kHz
Power rating: 60 (5,000 Hz)
Volume:
Impedance: 8 ohms
Sensitivity: 90 dB 1W/1m
Rated output power: 40 W
Input impedance: 8 ohms
Modulus value of impedance: ≥ 6.4 ohms
Power / 94 dB: 5 W / m
Frequency response: 50 - 22,000 Hz, ± 4 dB
Electric power corresponding to a spatial acoustic pressure of 1 Pa: 5 W, BR 1m
THD ratio:
125 - 1000 Hz: <3%
1000 - 4000 Hz: <1%
Weight: 8 kg
FM TUNER SECTION
Frequency Range: 87,5 MHz to 108 MHz
Sensitivity (IHF): 1,7 μV
Capture ratio: 1,2 dB
Selectivity (IHF): More than 80 dB
Image Rejection: More than 90 dB (98 MHz)
IF Rejection: More than 100 dB (98 MHz)
Spurious Rejection: More than 100 dB (98MHz)
AM Suppression: 55 dB
Signal to Noise Ratio: 75 dB
Harmonic Distortion:
Mono: less than 0,15% (100% modulation)
Stereo: Less than 0,2% (100% modulation)
Muting: Level Control (1 μV to 100μV)
Stereo Separation: More than 45 dB (1 kHz)
Sub Carrier Suppression: More than 65 dB
Output Voltage: Controllable from 0 mV to 2,0 V (100% modulation)
Fixed: 0,77V (100% modulation)
Antenna Input Impedance: 300 ohms balanced, 75 ohms unbalanced
AM TUNER SECTION
Frequency Range: 520 kHz to 1,605 kHz
Sensitivity (IHF): 100 μV/m (bar antenna), 15 μV (external antenna)
Selectivity (IHF): More than 30 dB
Image Rejection: More than 50 dB (1,000 kHz)
IF Rejection: More than 40 dB
Signal to Noise Ratio: More than 55 dB
Output Voltage: Controllable from 0 to 2 V
Antenna: Built-in ferrite bar antenna
MISCELLANEOUS
Semi-Conductors: Transistors: 9, Diodes: 14, FETs: 1, ICs: 4
Power Requirements: 110/220/240 V, 50 -60 Hz Switchable
Dimensions: 440 x 144 x 368 mm; (17,3 x 5,7 x 14,5 inches) (W x H x D)
Weight: 7,3 kg (16,1 lbs)