Advent/3 is smaller yet
Advent Corp. is now marketing a two-way acoustic suspension speaker system, the Advent/3. The compact unit, measuring 16 by 10 by 6 1/2 inches deep, has an impedance rating of 8 ohms and is said to need a minimum of 10 watts of amplifier power. Its frequency range is the same as that of the original Advent Loudspeaker except for the lowest half-octave of bass. The drivers and crossover network provide an octave-to-octave tonal balance as close to the original Advent's as possible. The manufacturer claims that the Advent/3 provides listeners with a higher-performance alternative to other systems in its price range. The speaker costs approximately $50.
Sansui offers high power in new receiver
The Model 9090 stereo receiver from Sansui features direct coupling throughout, from input to the power amplifier. The receiver is also equipped with signal-strength and tuning meters, a phase-locked loop stereo demodulator, microphone-mixing circuit, and 4-channel adaptor input. Capture ratio is 1.5 dB, and selectivity is 85 dB. With both channels driven into 8-ohm speakers, according to Sansui, the 9090 has an audio power output of 110 watts per channel continuous (rms) over the range from 20 Hz to 20 kHz with 0.2% total harmonic distortion. The receiver, which costs about $750, has a cabinet with walnut veneer.
A full-range equalizer from Ace Audio
The Model AE2002 audio equalizer from Ace Audio Co. is available both in kit and factory-wired versions. Each of the 5 bands per channel covers a 2-octave range, with each channel having separate controls. The equalizer is claimed to have full response down to 20 Hz and out to 20 kHz. With the maximum output at 8 volts rms, Ace Audio rates the unit at 2 volts output to a 10K load. Switches for power, tape monitor, and equalizer detent are provided, as well as an unswitched AC convenience outlet. The kit, designated AE2002K, is $84.25; the wired model, AE2002W, is $133.75. A construction manual is provided for $2.25 and a schematic diagram for $1.00.
Successor named to ADC-303AX speaker
Audio Dynamics Corp. has introduced its Model 303AX-2, a bookshelf speaker system that is designated as the successor to the popular ADC 303AX. The new model has a 10-inch acoustic suspension woofer and a wide dispersion tweeter. Frequency response is claimed to range from 37 Hz to 20 kHz. The walnut-finish cabinet is filled with a sound-absorbent material that, according to ADC, enhances the quality of the sound.
The system has a textured, removable grille cloth and sells for $129.
Southwest Technical's CD-4 demodulator
A complete CD-4 demodulator is available in kit form from Southwest Technical Products Corp. of San Antonio, Tex. The unit, designed by Lou Dorren of Quadracast Systems, Inc.. is built around an integrated circuit and can accommodate the Technics semiconductor cartridge made by Panasonic as well as the more familiar magnetic cartridges.
The kit is offered with power supply and case for a total cost of $50. A Technics cartridge is available for an additional $25.
Two new magnetic cartridges from Fidelitone Two magnetic cartridges, the JT-322 and the JT-311, have been added to the audio line of Fidelitone, Inc. The JT-322 features a compliant shank material, a dampener-with-ring system that is supposed to catch sound waves very precisely, and a claimed frequency response from 10 Hz to 45 kHz. It is applicable to CD-4, matrix systems, and 2-channel stereo and has an elliptical diamond stylus. The JT-311 is a stereo cartridge with a frequency response from 10 Hz to 28 kHz. It, too, uses compliant shank material, and its small stylus tip, says Fidelitone, makes for excellent trackability. The JT-322 sells for $54.95; the JT-311 costs $16.95.
Revox introduces unidirectional microphone Now available from Revox Corp. is its 3500 unidirectional moving-coil microphone, which has cardioid characteristics. According to Revox, use of a pressure gradient transducer and an efficient magnetic circuit results in outstanding performance and high sensitivity despite the microphone's small size. The company also claims that the 3500, which may be used stand-mounted or hand-held, is especially suited for tape recording. With an impedance of 600 ohms and a claimed response from 40 Hz to 18 kHz, the microphone comes with colored windshield, clamp, table stand, and presentation case. Its termination is of the Cannon XLR type. The Revox 3500 costs $165.
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(High Fidelity, Mar. 1976)
Also see:
Too Hot to Handle (Jan. 1977)