Saturday 1 and Sunday 2, returns a Torino the new appointment of "Gran Galà dell’Alta Fedeltà" at Hotel NH Lingotto di Torino, organized by Giulio Cesare Ricci.
NAD 3020
The NAD (New
Acoustic Dimension) brand name has existed in Europe for about many years but
is probably unfamiliar to most American audiophiles. NAD is an unusual company,
involving an international group of independent dealers whose needs and
suggestions play a major part in the development of its products, which are
designed to sound as good as the state-of-the-art. Permits and to sell at
prices within the reach of a broad segment of the buying public.
In designing
its Model 3020 integrated amplifier. NAD began with the assumption that, for a
given power-output level, a state-of-th-art. Unit need not cost significantly
more than a poor or mediocre one. They focused on the design areas that can
cause listening problems - for example, protective circuits that cause
distortion with very low or highly reactive speaker loads, phono preamplifiers
whose circuits interact with phono-cartridge inductance to affect
high-frequency response, and circuits whose excessive bandwidth mekes them
vulnerable to interference from radio transmitters and overload from infrasonic
turntable rumble or disc warps.
The NAD 3020
is a no-frills, moderately-prieced amplifier designed to provide
state-of-the-art. Performance at volume levels far in excess of what would be
expected from its conservative 20-watt per channel power rating. This
remarkable characteristic is made possible by high-voltage, high-current output
stages which can deliver short-term burst of two to five times the rated
continuous power output into loudspeakers of widely varying impedances. The
3020's exclusive "Soft Clipping" circuit permits listening levels
even beyond these limits by reducing harshness aat high volume settings.
The phono
preamplifier section of the 3020 contains a sophisticated 6=transistor circuit
which has been enginereed for extremely low noise and nearly distortion-free
performance. Built-in infrasonic and ultrasonic filters further reduce the
interference of non musical signals caused by turntable rumble, floor
vibration, tone arm or stylus resonances.
These
uniquely designed input and output stages combine to create an inexpensive
amplifier which is easily capable of driving the very best loudspeakers.
Designed for
Real_Word Performance
If you read
specificatoions and test reports you will find that the majority of modern
amplifiers measure well on the test bench, with impressive figures for
signal-to-noise ratio, power output at 8 ohmsm and ultra-low harmonic
distortion. But outside the laboratory many of these products don't perform as
well as their specifications suggest. In the home you don't listen tosignal
generators and 8 ohms test resistors; you listen to complex musical waveforms
generated by phono cartridges and reproduced through loudspeakers whose
impedance is seldom 8 ohms.
Rather than
incorporating costly refinements that may test well, but yeld little audible
improvement, NAD's engineers have designed the 3020 for optimum performance in
every day use.
Effective
Control Features
Like every
other part of its design, the 3020's controls have been carefully considered
for genuine usefulness. The Bass and Treble controls are tailored for musically
effective response in the high and low frequencies without altering the
critical mid-range tonal balance.
For
listening at low volume levels or with sensitive headphones, the 3020's Audio
Muting button reduces levels by 20 dB, expanding the useful range of the Volume
control and subduing any residual circuit noise. A simple, elegant set of five
LED's accurately displays the peak power level which the amplifier is
delivering to the loudspeakers, form 1 to 35 watts into 8 ohms or 2 to 70 watts
into 4 ohms. The circuit monitors both channels and displays the higher output
at each instant.
High-Performance
Design
Wide Range
Phono Preamplifier
In a
moderately priced amplifier you might expect to find an economy preamp circuit,
but the NAD 3020 contains a phono preamp stage which is audibly identical to
the finest separate professional preamps. The 3020 preamp interfaces correctly
with the impedances of real phono cartridges (as many preamps do not), it is
quiet enough for use with either moving-magnet or high-output moving-coil
pickups, and its distortion is extremely low, not only with sine-wave test
tones but also when reproducing complex high-level music signals. The 3020 was
designed to achieve the best signal/noise ratio when a cartridge is plugged in
(rather than with the usual, but inappropriate, short-circuit input). The total
dynamic range of the 3020 is typically 107dB, ample even for the
digitally-mastered recordings of the 1980s.
Infrasonic
and Ultrasonic Filters
Audio
signals are often contaminated with interference at frequencies below and above
the audible range, such as acoustic feedback, disc warps and radio
interference. Amplification of such signals yields no sonic benefit, wastes
amplifier power, and may cause intermodulation distortion muddy bass, excessive
woofer cone motions, and even tweeter burnout. The NAD 3020 contains a precise,
minimum-phase audio-bandpass filter which strips off such interference and
preserves a clean musical waveform.
Dual-Mode
Power Supply
The power
supply circuit for the output stage is only loosely regulated, so it is free to
supply the high voltages needed for a high IHF headroom factor (at 8 ohms) and
also to supply the large currents at lower voltages needed for driving
low-impedance loads (down to 2 ohms). An entirely separate power supply
circuit, operating from another secondary winding on the power transformer,
supplies extremely stable, noise-free, regulated operating voltages for the
preamplifier and tone control stages; thus distortion and blurring of the
stereo image due to power supply modulation cannot occur in the 3020. The NAD
3020 has earned a world-wide reputation among audio reviewers for its sensible
and efficient design and superb performance.
Numerous
test reports, comparing the 3020 with equipment of far greater power rating and
cost have proven the 3020 to be an outstanding value.
The power
supply for the NAD 3020 output stages is loosely regulated - that is, when
there is little or no audio signal present, the supply voltage is relatively
high, giving the amplifier a large short-term power-output capability (which is
reflected in its very high IHF dynamic-headroom rating). A heavy load, whether
from high average signal levels or from aa very low load impedance, causes the
power supply voltage to drop, limiting the current through the output
transistors to a safe value.
Specifications
Pre-Amp
Section
Phono Input
Input
Impedance (R and C): 47 kΩ/ 47pF
Input
Sensitivity (1kHz): 2.5 mV ref. 20W
Signal-to-Noise
Ratio (A-weighted with cartridge connected):
75 dB ref. 5mV
Line Level
Inputs
Signal-To-Noise
Ratio (A-weighted ref 1W): greater than
86 dB
Channel
Separation: greaer than 60 dB
Frequency
Response: 20 Hz - 20 kHz (±0.5 dB)
Infrasonic
Filter: -3 dB at 15 Hz, 24 dB/octave
Ultrasonic
Filter: -3 dB at 35 kHz, 12 dB/octave
Power Amp Section
Continuous
Output Power (into 8 W )*: 20 W (13 dBW)
Rated
Distortion (THD 20Hz - 20kHz): 0.02%
Clipping
Power (maximum continuous power per channel):
30W
IHF Dynamic
Headroom (at 8W): +3 dB
IHF Dynamic
Power (maximum short term power per channel):
40 W
at 8 Ω
58 W
at 4 Ω
72 W
at 2 Ω
Physical Specifications
Dimensions
(W x H x D): 420 x 96 x 240 mm
Net
Weight: 5,3 kg
Shipping
Weight: 6,7 kg
B&W DM-550
Following on
from B&W's highly acclaimed and successful 100 Series, the DM550 digital
monitor takes full advantage of a whole new generation of design technology to
produce improved performance with a higher frequency range and lower
colouration. With its
aesthetically pleasing styling, your DM550 is designed to anticipate individual
preferences and match all types of environment.
System
parameters for the B&W 500 Series have been optimised by the extensive use
of computer aided design to ensure efficient and extended low frequency
performance. To achieve the goal of flatter response curves and lower
colouration, totally new drive unis have been designed - benefiting from the
use of finite element predictions of cone behaviour and laser interferometer
assessment of prototypes. Quite deliberately, the B&W 500 Series of
loudspeakers are described as digital monitors. They have been designed for the
age of the compact disc, with all the additional requirements that this
material places on the loudspeaker system - such as increased dynamic range,
increased transient information, lower noise floor, etc. B&W DM550 is however,
just as much at home with good analogue material and essentially will
faithfully reproduce whaatever signals are fed to it.
Stand-mount/Bookshelf
loudspeaker system
The tailored two-way closed box design incorporates a 6" bass/midrange driver with a large magnet assembly thrusting high pressure
sound reproduced to precise limits dictated by the dimensions of small enclosure.
A one piece moulding has been used to strengthen the cabinet
rigidity between drivers and front
baffle. The metal-domed high frequency unit dictated by CAD allows the simplest
of crossovers to be used. All of
which increases cost-effectiveness without impairing linearity.
Technical
highlights
B&W's Tweeter technology ensures that the sound remains focused
and time sensitive and that the
stereo image is presented with unparalleled three dimensional accuracy.
The cabinets feature a specially designed high density front baffle
which achieves almost Matrix-like
stability in strengthening overall enclosure construction. The bevel edges of
the front moulding reduce
diffraction and improve dispersion.
The crossover components use heavy gauge wire throughout and new
drivers guarantee not only high
reliability but ensure that top specifications are met
The design
brief for DM550 called for a small and cost-effective loudspeaker that could be
incorporated unobtrusively into the home, while still possessing the linearity
and bass extension of true monitor system.
The drive
units
The two-unit
closed box alignment chosen for DM550 employs a specially designed 160 mm
(6") bass driver, with 26 mm (1") high temperature voice coil. This
enables a simple crossover to be employed which not only increases cost
effectiveness but retains system linearity.
The new
metal-domed tweeter uses the same diaphragm as the highly acclaimed Matrix 801
Series 2, and gives true piston behaviour up to frequencies in excess of 20
kHz. And like all B&W components, it's B&W made.
The
enclosure
The
expertise B&W have gained with cabinet technolgy following the invention of
the B&W Matrixx Series has enabled us to reduce unwanted cabinet vibration.
In the case of the 500 Series our
attention has been focused on the front baffle construction, and we make full
use of modern structural plastics, to both strengthen and enhance the
appearance.
The
crossover
Sophisticated
computer technology has enabled B&W
to optimise each component in the crossover network at the design stage.
Every production sample is also computer-tested to close tolerance, ensuring
that each loudspeaker faithfully reproduces the original design specifications.
Overload
protection
A 2-amp
quick-blow fuse protects the system against excessive input of normal musical
signals. However, certain abnormal signals, particularly those containing only
high frequencies, could damage the tweeter. The usual precautions, such as
turning off the amplifier before connections are made, should be observed. The
fuse is located in the rear of the cabinet.
Specifications
Frequency
Range: 56 Hz to 30 kHz (-6 dB points)
Bass
Loading: Second-order closed box
alignment
Frequency
Response: 75 Hz – 20 kHz, ±2,5 dB on reference axis
Dispersion: 20 Hz to 15 kHz
Vertical
: ±2 dB over 10° arc
Horizontal
: ±2 dB over 40° arc
Sensitivity: 87 dB (2,83 V/ 1 m)
Distortion
(For 90 dB at 1 m)
Second
Harmonic :
Less than 3%
at 20 Hz to 200 Hz
Less than 1%
at 200 Hz to 20 kHz
Third
Harmonic:
Less than 2%
at 20 Hz to 200 Hz
Less than 1%
at 200 Hz to 20 kHz
Impedance:
Nominal 8 Ω (not faling below 4 Ω)
Crossover: third-order acoustic response low-pass and
high-pass
Drive Units:
1 x
26mm high-frequency with aluminium
dome, One 26mm coil on aluminium
former, wound with polymide resin
and heat cured
1 x
160mm bass/midrange with composite
short fibre, 26mm coil on high
temperature former, wound with polymide
resin and heat cured
Power
Handling: Suitable for amplifiers with
10 W to 75 W output
Dimensions
(H x W x D): 352 x 204 x 243 mm
(13-7/8" x 8" x 9-1/2")
Weight: 5,5 kg
(12 lbs)
Cabinet
Finish: Simulated veneers of walnut or
black ash
Akai AA-6300
Akai's
AA-6300 Solid State Am/FM Multiplex Stereo Receiver with FET for improved FM
sensitivity and IC for high Selectivity is designed especially for the low
budget buyer seeking a high-quality tuner-amplifier. Among the outstanding
features of this versatile instrument are:
FET (Fiel
Effect Transistor) Front End for improved FM sensitivity.
IC
(Integrated Circuit) in IF stages for high selectivity.
80W (40W per
channel) Music Power
AM/FM Signal
Strength Meter
Automatic FM
Stereo/Monaural Switching
Speaker
System Selector
Tape Monitor
and Monitor Switches
Bass, Treble
and Loudness Control
Stereo
Headphone and DIN Jacks
Specifications
FM Tuner
Section
Frequency
Range: 88 to 108 MHz
Sensitivity
(IHF): 2,0 µV
Signal-to-Noise
Ratio: better than 65 dB
Selectivity:
better than 50 dB
AM Tuner
Section
Frequency
Range: 535 to 1605 kHz
Sensitivity
(IHF): 20 µV at 1 MHz
Signal-to-Noise
Ratio: better than 50 dB
Selectivity: better than 20 dB
Amplifier
Section
Frequency
Response: 20 Hz to 40,000 Hz (-3 dB)
Output
Power: 80 W at Music Power
Dimensions
(W x H x D): 445 x 133 x 340
(17-1/2" x 5-3/4" x 13-1/2")
Weight: 10,4 kg (22,5 lbs)
Akai AA-6200
Akai AA-6200
all Silicon Transistorized Solid State FM/AM Multiplex Stereo Tuner-Amplifier
with Two Integrated Circuits.
Simplified
controls for easier operation
Attractive
black and silver front panel design.
Outstanding
Features:
FM and AM
Sections - Ceramic Filters for better selectivity.
Field Effect
Transistor front end for extra sensitivity
FM Center
Tuning and FM/AM Signal Strength Meter
Stereo
Indicator Lamp
4-Stage FM
IF Amplifier
AM Bar
Antenna
2 AC Outlets
for extra convenience
40 W Music
Power
Tape Monitor
and Stereo/Mono Switches
Loudness
Control
Bass, Treble
and balance Controls
Headphone
and DIN Jacks
Universal
Voltage Selector
Specifications
FM Tuner
Section
Frequency
Range: 88 to 108 MHz
Sensitivity
(IHF): 2,5 µV
Signal-to-Noise
Ratio: better than 60 dB
Stereo
Separation: better than 33 dB
Selectivity:
better than 60 dB
AM Tuner
Section
Frequency
Range: 535 to 1605 kHz
Sensitivity
(IHF): 25 µV at 1 MHz
Signal-to-Noise
Ratio: better than 50 dB
Selectivity: better than 20 dB
Amplifier
Section
Frequency
Response: 20 Hz to 50,000 Hz (-3 dB)
Output
Power: 40 W at 4 Ω ; 15 W at 8 Ω
Harmonic
Distortion: 0,2%
Input
Sensitivity:
Phono : 3 mV
Aux, Tape
: 150 mV
Signal-to-Noise
Ratio:
Phono : better than 60 dB
Aux, Tape
: better than 70 dB
Dimensions
(W x H x D): 445 x 133 x 340
(17-1/2" x 5-3/4" x 13-1/2")
Weight: 8,4 kg (18,5 lbs)
Kenwood KA-6004
Exceptinal
Stability of Amplification achieved Constant Current Driving System
The KA-6004
achieves an over-all high level of reliability in every performance phase. If
only the strictest requirements are met by each component, then they are
included in the full assembly potential of this outstandingly unique amplifier.
For example, the pre-amplifier uses a new type of can seal (metal cased)
transistor which is capable of off-setting usual characteristic deterioration
in S/N ratio resulting from humidity and temperature wear. Low noise PNP
transistors have been attached to the top of the equalizer circuit. Also,
super-high nichrome evaporated metal film resistors have been used in the
feedback circuit in the equalizer stage. Each error thus occurs only within
±1%. These same resistors are also only equipped in all other significant
circuits to vastly improve S/N and block S/N age deterioration.
Linear
Frequency Power Output Kept 40 W in 20 Hz to 20 kHz
Kenwood has
been improved in output indication. In the conventional way, output was
indicated in just one point of 1 kHz. However, in Kenwood's latest way of
improving over-all quality guaranteed output is indicated in the entire range
of audio frequency of 20 Hz to 20 kHz, i.e. the output is indicated in
"minimum point", but not in "maximum point".
The maximum
output is a performance figure that implies the dynamic range of the power
amplifier, therefore, only the output of 1 kHz will imply the imperfect
performance of the amplifier because the output of any amplifier is usually
best near 1 kHz. However, as described in the preceding, KA-6004 has the
circuits to allow the simultaneous indication of entire performance. With an
all stages direct-coupled circuit provided, the output linearity in low pass
will be shown by power output data
Higher
Reliability Achieved by Strictly Selected Components
The
pre-amplifier employs a new type of can seal transistors that are capable of
precluding the characteristic changes, i.e. the characteristic deterioration of
S/N caused by humidity and temperature. At the top of equalizer circuit, low
noise type PNP transistors are equipped.
The feedback circuit in the equalizer stage employs super-high precision
nichrome evaporated metal film resistors, each error within ±1%. The nichrome
evaporated metal film resistors are equipped in all other important circuits to
prominently improve S/N and preclude age deterioration of S/N.
1
Pure-complementary
Circuit + Constant Current Driving
The KA-6004
employs Kenwood's exclusive Constant Current Driving system in the
pure-complementary and direct coupling driver stage. The highest stability in
the amplification is now obtainable. By minimizing crossover distortion and by
improving phase characteristics, the KA-6004 guarantees superb performance
quality from ultra low range to far above the limit of audio frequency. It also
prevents performance from deterioration caused by the deviation in power
voltage. Kenwood has overcome the last problem-instability-remaining in direct
coupling amplification. The refined reproduction is fully enjoyable.
2
Protection
Circuit
All stages
direct-coupled circuit in KA-6004 includes constant current driver circuit
capable of amplifying from DC. The driving way will amplify faithfully the
superlow pass, i.e. plus minus several
Hz of the frequency picked up by cartridge on bowed record plate and
wow-fluttered turntable, thus the faithful amplification will permit
unnecessary critical load on speaker. In addition, if direct current input
should be applied, burning of voice coil may by caused. To prevent the preceding troubles in KA-6004,
a protecting circuit is employed to cut superlow pass of 10 Hz or less in order
to protect speaker against overload.
Exceptional
Dynamic Range
The
equalizing stage of preamplifier has been entirely redesigned to obtain
exceptionally wide dynamic range. The KA-6004 assures 420 mV p-p maximum input
level (at 1 kHz). Any fortissimo peak can faithfully reproduced without
saturation. Further, thanks to the minimized RIAA deviation of within ±0,2 dB,
playback with real high fidelity is guaranteed.
Attenuator
Type Tone Control
Attenuator
is employed in tone control, +10 dB to -10 dB is covered by 2 dB controlled.
Left and right characteristics are correctly coincided, so that no unbalance
will be caused in tone control.
In
conventional volume type, frquency characteristic is not perfectly flat even at
zero degree, but is waved. In KA-6004, with tone control positioned at
"Off", tone control circuit is neglected, so that frequency
characteristic is kept correct.
Noise Filter
Low cut
filter has two turnover points, i.e. 40 Hz and 80 Hz controlled, and sharp
attenuation characteristic of 12 dB/oct. The filter will also protect speaker,
with protection circuit associated, againt large signal inputted in low pass.
High cut
filter has a higher turnover point, i.e. 7 kHz which will reduce noise only
without damaging desired tone, and an easy attenuation characteristic of 6
dB/oct.
Input
Selector
The KA-6004
is versatile for input program sources. It features input jacks for 2 pairs of
phono, 2 pairs of Aux, tuner and microphone.
A program source on operation is shown by luminous indicator on the
front panel.
Two Systems
of Tape Monitor
Two systems
of tape monitor circuits, i.e. A and B are provided to allow simultaneous
activation of two decks. Mutual dubbing
is easily allowed by switching only.
Microphone
Input
Mic input
terminals are equipped on front paanel, so that right-side two systems of
microphones will allow so easier operation. Since selector positions are
independent, the input may be used sufficientlyfor microphone amplifier.
Push Button
Type Speaker Selector
Two pair of
speaker terminals, i.e. A and B may be changed by push-button correctly locked.
With A and B pushed at the same time, simultaneous activation is allowed.
9
One Touch
Type Speaker Terminals
Speaker
terminals are of one touch connection type which allow easy and correct
coupling, so that the system will eliminate any trouble on speaker connection.
Loudness
Control
On a level
of -30 dB, low pass is 100 Hz with +8db and high pass in 10 kHz with +3 dB,
both provided higher than the conventional, so that the control will supplement
low and high pitched tones.
Specifications
Continuous
Power Output:
Both channel
driven:
40/40
watts into 8 Ω at any frequency from 20 - 20,000 Hz
43/43
watts into 8 Ω at 1,000 Hz
57/57
watts into 4 Ω at 1,000 Hz
Each channel
driven:
55/55
watts into 8 Ω at 1,000 Hz
70/70
watts into 4 Ω at 1,000 Hz
Dynamic
Power Output (IHF):
130
watts per channel into 8 Ω at 1,000
Hz
220
watts per channel into 4 Ω at 1,000
Hz
Total
Harmonic Distortion:
less than
0,5% at rated output from 20 - 20,000 Hz;
less than
0,05% at -3 dB rated output
Intermodulation
Distortion (60 Hz; 7,000 Hz; 4:1):
less than
0.3% at rated output;
less than
0,05% at -3 dB rated output
Power
Bandwidth (IHF): 10 Hz to 50,000 Hz
Input
Sensitivity/Impedance (for rated output, at 1,000 Hz):
Phono
1: 2,5 mV/50 kΩ
Phono
2: 2,5 mV/ 50 kΩ
Tuner: 200 mV/ 100 kΩ
Aux 1,
2: 200 mV/ 100 kΩ
Tape
Play A & B: 200 mV/ 100 kΩ
Mic: 3
mV/50 k Ω
Main
Amp. Input: 1 V/ 50 kΩ
Recording
Output (below rated input):
Tape Rec A
& B: 200 mV
DIN
connector: 40 mV
Signal-to-Noise
Ratio (below rated output):
Phono 1
& 2: 68 dB
Mic: 70 dB
Tuner: 75 dB
Aux 1 &
2: 75 dB
Tape Play A
& B: 75 dB
Noise
at Minimum Volume Control: 0,3 mV at 8 Ω, 0,000012 milli watts
Damping
Factor: 32 at 8 Ω load; 64 at 16 Ω load
Speaker
Impedance: accepts 4 to
16 Ω
Bass
Control: ±10 dB at 100 Hz (with 2 dB
step switch)
Treble
Control: ±10 dB at 10,000 Hz (with 2 dB
step switch)
Low
Filter: 40 Hz and 80 Hz cut off, 12 dB
per octave
High
Filter: 7,000 Hz cut off, 6 dB per octave
Loudness
Control (-30 dB): +8 dB at 100 Hz; +3 dB
at 10,000 Hz
Switches:
Speaker
: A, B (ON-OFF at push switch)
Selector
: Aux1, Aux 2, Tuner, phono 1, Phono 2,
Mic
Mode : left, Right, Stereo, REV, Mix
Tape Monitor
: Dubbing, (A→B), A Play, Source< B
Play, Dubbing (B→A)
Others
: Low & High Filter, Loudness,
Muting, Power
AC
Outlets: 1 switched & 3 unswitched
Power
Requirement: 110 - 120 V/220 - 240 V AC,
50/60 Hz
Power
Consumption: 235 watts at full power; 15
watts at no signal
Dimensions
(W x H x D): 435 x 153 x 300 mm (17-1/8
x 6-1/32 x 11-13/16 inch)
Weight: 11,5 kg (25,4 lbs)
Kenwood KA-4000
Kenwood 120
Watt Solid State Amplifier Model KA-4000
Features
120 watts of
IHF standard total music power enough to drive even low efficiency Hi-Fi
speaker
The wide
power bandwidth of 13 Hz to 30,000 Hz with very low IM distortion
Lever type
-20 dB muting switch of quick response for momentary quietness during telephone
call, etc.
2 dv step
type tone controls
Blue light
indicators for input selector switch
Lever type
high and low filter switches
Pre-amplifier
outputs for use with other power amplifier or multichannel system.
Main
amplifier inputs for the use with pther pre-amplifier, tuner and tape recorder
with pre-amplifier, and also these inputs enable you to drive the main
amplifier directly
Speakers
terminals for 2 sets of stereo speakers and front panel speaker selector switch
(A, B, A & B and Phones)
Large
Volume/Balance controls knob located in center of front panel.
Exclusive
blow-out proof automatic circuit breaker protects power transistors
SPECIFICATION
Power Output
(continous power; at any frequency from 20 -20,000 Hz):
Total
Music Power (IHF): 120 watts at 4 Ω; 100
watts at 8 Ω load
Continuous
Power:
Each channel
driven: 53/53 watts at 4 ohms load; 40/40 watts at 8 ohms load.
Both
channels driven; 41/41 watts at 4 ohms load;
32/32 watts at 8 ohms load.
Power
bandwidth (IHF): 13 Hz to 30,000 Hz
Harmonic
Distortion: Less than 0,5% at rated
output from 20 to 20,000 Hz
Intermodulation
Distortion (60 Hz & 7,000 Hz, 4:1):
Less than
0,3% at rated output or at any level of less than rated output;
Less than
0,1% at -3 dB rated output
Frequency
Response:
Main Amp.
only; 18 Hz to 50,000 Hz ±1 dB
High Level
Input; 20 Hz to 50,000 Hz ±1 dB
Sensitivity
(fro rated output at 8 ohms load):
Phono
1; 2 mV
Phono
2: 2 mV
Tape
Head: 2,3 mV
MIC: 2 mV
AUX: 200 mV
Tuner: 200 mV
Tape
Play: 200 mV
Main Amp
Input: 100 mV
Input
Impedance (at 1,000 Hz):
Phono 1
: 50 Kohms
Phono 2
: 50 Kohms
Tape Head
: 100 Kohms
MIC : 100 Kohms
AUX,Tuner,Tape
Play : 100 dB
Main Amp.
Input : 300 kohms
Signal-to-Noise
Ratio (below rated output):
Phono 1
: 65 dB
Phono 2
: 65 dB
Tape Head
: 63 dB
MIC : 67 dB
AUX, Tuner,
Tape Play : 77 db
Noise at
minimum volume control: 1mV at 8 ohms or 0,0125 milliwatts.
Output
Impedance (at speaker terminal):
0,29 ohm at
1,000 Hz
0,52 ohm at
50 Hz
0,29 ohm at
10,000 Hz
Damping
Factor (at 1,000 Hz):
55 at 16
ohms load
27,5 at 8
ohms load
Low Filter
(for rumble): 80 Hz Cutoff, 12 dB per
Octave
High Filter
(for scratch ): 8,000 Hz Cutoff, 12 dB
per octave
Bass
control: ±10 dB at 1000 Hz with 2 dB
step switch
Treble
Control; ±10 at 10,000 Hz with 2 dB
stepswitch
Power
Requirement/Consumption:
AC
110-120/220-230 volts, 50/60 Hz
18 watts
quiescent. 190 watts at full power
Dimensions: 16⁵/₁₆"
x 5 ⁵/₃₂" x 11 ¹/₃₂" (W x H x D)
Weight: 17,6
lbs
Yamaha TC-520
Yamaha
TC-520 Front-loading Two head Stereo
Cassette Tape Deck
Mechanical
Tape Loading
Chrome Tape
Capability
3-digit
Mechanical Counter
Two analog
VU meters
Bias Fine
Tune
Dolby B
circuit
The wrong
cassette deck will play your tapes to death. Just a fractional misalignment of
all those pulleys, belts and wheels, and you wind up with tapes that are more
of a pain than a pleasure to listen to. That's why
we took such care with the tape transport in our new TC-520.
The only
directly power driven part, for instance, is the capstan. So there's less
chance your tapes will feel stretched.
We've made
sure that this crucial capstan is rounded to within 0,1 microns of perfection.
So everything turns the smoothest possible circle. There's double belt drive
for even more stable rotation.
While the DC
motor is designed to give high torque and low vibration. Very smooth.
Just as
smooth as all the other features.
Yamaha's
superhard permalloy head means clean sound with less wear. You have the choice
of low noise, chrome and ferrichrome positions. A bias adjust selector means
you can choose the perfecct setting for each individual tape. While two
illuminated VU's flash red for +8 dB, yellow for +3 dB.
Yamaha high
performance means you can always expect pur natural sound with low distortion.
So you'll never hear anything except what you want to hear on our new TC-520.
Specifications
Type: 2-head, single cassette deck
Track
System: 4-track, 2-stereo channel
Tape
Speed: 4,8 cm/s
Motor:
Electronic Controled DC Motor
Frequency
Response:
Normal Tape
: 30 - 13,000 Hz ±3 dB
Ferrichrome,
Chrome Tape : 30 - 15,000 Hz ±3 dB
Distortion:
Normal Tape
: less than 1,5%
Ferrichrome,
Chrome Tape : less than 2,0%
Wow and
Flutter: less than 0,05%
Signal-to-Noise
Ratio: 57 dB (with Dolby at 66 dB)
Inputs
Line/Mic: 50 mV / 0,3 mV
Output
Line: 0,4 V
Dimensions
(W x H x D): 435 x 160 x 327 (17,1"
x 6,3" x 12.9")
Weight: 7,5 kg (16 lb 52 oz)
Yamaha CDX-390
Features
ENTRY
LEVEL SINGLE DISC COMPACT DISC PLAYER - Provides high quality CD performance and convenience features.
TAPE
EDIT - Automatically arranges CD
selections to most efficiently use selected tape recording length.
CD
SYNCHRO START - Works with Yamaha
cassette deck to provide completely synchronized CD and tape start at the touch
of a button.
PEAK
SEARCH - Searches for the highest
output level, so the optimum recording level can be easily set.
DIRECT
TRACK ACCESS - Front panel 10-key
pad allows easy selection of particular tracks.
4-MODE
TIME DISPLAY - Visually check
total time on disc, total remaining time, elapsed track time, elapsed total
time.
INTELLIGENT
DIGITAL SERVO - Adjusts tracking,
focus, and motor speed to compensate for disc defects, warpage, and dust.
SINGLE
BIT DAC - Delivers excellent
digital-to-analog conversion.
Specifications
Total
Harmonic Distortion:
0,003%
Frequency
Response: 2 Hz -
20,000 Hz ±0,5 dB
Signal-to-Noise
Ratio: 105 dB
Dynamic
Range: 95 dB
Wow and
Flutter: Unmeasurable
Output
Voltage (1 kHz, 0 dB): 2,0 ±0,5 V
Power
Requirements: 110/120/220/240 V, 50/60
Hz
Power
Consumption: 20 W
Dimensions
(W x H x D): 435 x 96 x 272 mm (17-1/8" x 3-3/4"
x 10-3/4")
Weight: 3.8
kg (8.4 lbs.)
Tannoy Arden
This system
is a highly developed and refined version of the Tannoy loudspeaker. It
utilises the dual concentric principle to provide an integrated sound source
which, over the past quarter of a century, has become an established quality
reference in recording, broadcasting and television studios.
The Tannoy
system combines a precision built high frequency compression horn driver with a
direct radiator bass unit embodying the unique Girdacoustic ( on HDP385A and
HDP315A only) reinforced cone.
These two
drivers are mounted concentrically on a single frame and magnet assembly. They
are driven through a sophisticated
separate crossover network creating a system covering the entire frequency
range from 20 Hz to 20 kHz.
Distortion
products are negligible, and the wide, smooth frequency range with excellent
transient response result in very natural reproduction and an almost total lack
of colouration.
Sensitivity
is high. A 20 Watt amplifier used with the smaller systems is more than
adequate for normal domestic purposes. This sensitivity combined with high
power handling capacity, makes the larger units ideal for the most
sophisticated professional or home installations.
ARDEN
The
outstanding performance characteristics of the HPD385A Integrated Loudspeaker
System are completely realised by the Arden, the largest model in the range. An
extended bass response is obtained through the use of a triple ducted port
system resulting in very low distortion products. The system is front recess
mounted to avoid tunnel and diffraction effects. With generous internal
strutting for high rigidity, the internal cavity is critically damped with
graded acoustic foam ensuring lack of colouration in the bass response.
A - Rolled
surround for stability in low bass response
B - Unique
ribbing virtually eliminates cone break-up ensuring smooth response and
extraordinarily high power capacity
C- High
temperature voice coil
D -
Dustproof, acoustically transparent sealing dome
E -
Concentric HF horn (completed by curved LF cone)
F - Phase
compensating multiple throat for extended and smooth HF response
G - Acoustic
balance cavity for reduced distortion
H -
Precision contoured high frequency diaphragm
I -
Aluminium voice coil conductor for superb HF response
J -
Exclusive magnetic shunt for increased LF flux
The
Crossover Network
The Tannoy
crossover network divides the electrical energy from the amplifier between the
high frequency compression driver and the low frequency direct radiator and
makes a vital contribution to the overall performance of the system.
It
incorporates two controls. One permits attenuation of the treble energy output
only in the range above 5 kHz. The other allows the output of the high
frequency unit to be increased or attenuated over its entire range from 1 kHz
to 20 kHz, compensating for roomacoustics and individual preference.
The
crossover is assembled to the very highest standards on a fibreglass printed
circuit board. Solid dielectric capacitors are used throughout and all
resistors and inductors are very generously rated.
The design
of the crossover ensures that the complete loudspeaker system has an excellent
impedance characteristic which provides the ideal load for any amplifier.
Components
Integrated
Drive System
The Tannoy
Integrated Drive System consists of a direct
radiator bass unit and a high frequency horn-loaded compression driver
both located concentrically within the same frame and magnet assembly, this is
why it is known as the dual concentric system.
Bass Unit
This is a
low resonance speaker with a 2" high temperature voice coil. The unique
Girdacoustic reinforced cone ensures true piston action and smooth performance
extending well into the midrange region.
Treble Unit
High
frequencies are reproduced by a horn-loaded compression driver utilizzing a
duralumin diaphragm and a 2" diameter aluminium voice coil.
Specifications
Low
Frequency Direct Radiator
Maximum
Diameter: 420 mm (16 ½")
Voice Coil
Diameter: 50 mm (2")
Bl Factor in
gauss/cm: 20 x 10⁶
Fundamental
Resonance: 20 Hz
High
Frequency Compression Driver
Duralumin
Diaphragm: 50 mm (2")
Voice
Coil Diameter: 50 mm (2")
Horn Cut-off
Frequency: 500 Hz
Drive
System: 3828
Power
Handling Capacity: 85 W
Nominal
Impedance: 8 ohms
Frequency
Response: 30 Hz - 20 kHz, ±4 dB
Sensitivity;
Input Watts produce 96 dB at 1 m: 3
Crossover
Frequency: 1 kHz
System
Dimensions (H x W x D): 990 x 660 x 370
mm (39" x 26" x 14 ½"
Weight: 56 kg (shipping)