The
Essential Features:
In the
interest of musical resolution and sonic transparency only an input selector, a
record output selector, a volume control, and a power switch are provided.
Inputs are available for Tape, CD, Tuner and Aux.
The
amplifier circuits are 100% discrete -
no ICs are used. All parts are of the finest quality. Voltage
amplification is performed by a differential two-stage circuit.
The IA-3
power amplifier section is rated at 40 watts per channel (stereo) into 8 ohms.
The oversized power supply and high-current output stage, however, result in
considerable dynamic headroom, enabling the clear reproduction of demanding
musical peaks. The amplifier
low-impedance drive capability is exceptional. Efficient dissipation of thermal
energy is assured by heat sinks made of black almite.
Starting at
the inputs, separate ground lines are maintained for the left and right
channels, becoming common only at the speaker outputs. This through left/right
ground isolation is especially important in the low-level stages and
contributes to greatly enhanced stereo separation and imaging.
Conventional
designs with monitor switches require a contact point in the signal path, and
the constant load of a monitor output is detrimental to signal purity. The IA-3
takes a different approach the record output selector is not part of the main
signal path and, hence, has no advers affect on sound quality.
The power
supply section and audio circuits are on separate printed circuit boards to
prevent any unwanted interaction.
The
selectors, volume control, and input/output jacks are arranged to maintain the
shortest possible signal path.
A heavy-duty
chassis with a dual-plate bottom eliminates "ringing" and effectively
shields the amplifier circuits from external interference.
The power
transitors, volume control, and blocking capacitors are all high-grade
components designed specifically for exacting audio applications.
The CD input
jacks are gold-platted.
The front
panel and the control knobs are made of heavy-gauge aluminum.
Screw-type
terminals are provided for speaker connection.
Specifications:
Power
Amplifier Section
Rated Power
Output:
40 watts per
channel into 8 Ω (both channels driven, 20-20,000 Hz; 0,1%THD)
65 watts per
channel into 4 Ω (DIN, both channels driven 1 kHz; 1%THD)
Dynamic
Power Output:
57 watts per
channel into 8 Ω
80 watts per
channel into 4 Ω
Power
Bandwitdth: 10 - 40,000 Hz
Frequency
Response: 20 - 20,000 Hz +0, -1 dB; 10 -
60,000 Hz =0, -3 dB
Signal-to-Noise
Ratio:
better than
103 dB rated power (A-weighted,, input shorted)
better than
83 dB (A-weighted, input shorted , IHF-A-202)
Total
Harmonic Distortion: 0,1% or less (8 Ω,
rated power,, 20-20,000hz)
Peak Current
Capability: 12 A
Preamplifier
Section
Input
Sensitivity/Impedance: 150 mV/20 k Ω
Output
Level/Impedance: 150 mV/1 k Ω (Rec Out)
General
Power
Requirement: 110, 120, 220, 240 V AC,
50/60 Hz
Power
Consumption: 210 W max
Dimensions
(W x H x D): 430 x 75 x 320 mm
