The new SAE
"01" Series power amplifiers represent a redirection of amplifier
design philosophy in which great emphasis is placed upon reality, the need for your power amplifier to interact
with your speakers and produce the desired result (clean, clear, enjoyable
music) regardless of volume level, program material or speaker design. The
"01" amplifiers are capable of passing the complex musical signals of
your program material into the equally complex load of your speakers with the
highest degree of accuracy.
What makes
this different from any other amplifier design? Very simply, the degree to
which SAE has pursued this goal.
Other
amplifiers seem to be satisfied with great "specs". They often forget
that laboratory test situations - the standard distortion measurements we've
heard so much about - do not reproduce the reality of your music, played
through your speakers, in your living room.
Those
THD and IM measurements so often used to judge an amplifier's performance are
obtained by feeding a simple, predictable sine wave to an amplifier and
observing how accurately that amplifier passes it to a static 8 Ω load resistor. Since the sound waves of real
music are neither simple non predictable, and a real loudspeaker is a dynamic
load which only occasionally offers exactly 8 ohms of resistance.
SAE saw the
need to go beyond conventional test procedures. We fed music - not sine waves -
into loudspeakers, and our findings led us to the creation of the
"01" Concept, and a line of power amplifiers which embodies all of
the following features:
High Current
Capability
When
we replaced the standard 8 Ω resistor
with an active loudspeaker, we saw a complex ever-changing load which often
appears to the amplifiers as a load even lower than 2 ohms. When this happens
your amplifier needs to deliver more current to your loudspeaker than would
ever be necessary with an 8 Ω load.
All of the SAE "01" amplifiers have a vast amount of reserve power.
In fact, each is capable of over ten times the amount required to breeze
through conventional performance tests.
Balanced
Circuit Design
Your power
amplifier must be prepared to deal with a bombardment of highly complex,
constantly fluctuating sound waves,
waves that are asymmetric (where the positive half of the wave is often
quite different from the negative half). SAE's solution to this challenge is
separate complementary amplifiers. Each channel
of an "01" power amplifier actually contains two amplifiers -
one for the positive side of teh program and one for the negative side. From
input to output, a totally independent amplifier designed to deal with that
particular part of the waveform. Thase mirror image amplifiers combine to
provide a signal so free of distortion there is no need for feedback
correction.
Natural
Damping
Damping is
the amplifier's ability to provide controlled "breaking" of the
speaker at the end of a waveform. Conventional amplifier tests actually
evaluate the sum of two very different types of damping. One, which we call
"artificial" damping, is generated in the negative feedback loop of
the amplifier ,and therefore, is both frequency and level dependent . The
second type. "natural" damping, is the actual internal resistance
of of the amplifier. It is not affected
by the frequency or level of the signal. As the music becomes more complex, and
particularly when high frequencies are involved, this natural damping is what
really controls the loudspeaker. SAE found this damping factor to be determined
by the number of output devices, the size and quality of the power supply, and
the actual wiring of the amplifier. Our "01" Series is designed to
give a very high natural damping ability … to provide precise control of your
loudspeakers regardless of the music.
As other
components in your high fidelity system become more and more sophisticated, the
power amplifier's job of controlling both signal and speaker becomes
increasingly more challenging. The SAE "01" Series is the beginning
of a new era of amplifiers designed to handle the complex demands of history's
most advanced audio systems. Listen to what it can do for yours.
2401
Technical Features
Dual Power Supply - with toroid power
transformer provides massive energy reserve for bass transients and reduced
channel interaction for improved stereo imaging.
Toroid Power Transformer - provides a
significantly reduced hum field for improved signal to noise ratio.
Gold-Plated Internal Connectors - and glass
epoxy circuit boards; provide higher sonic performance and long term
reliability.
Turbo-Flow heatsinks - designed by SAE to
break-up the laminar air flow surrounding conventional heatskins and thus
significantly improve amplifier's heat dissipation under heavy or continuous
use.
LED Power Display - provides fast, accurate
indication of 2401 output in both dB and watts at 8 ohms.
Wideband and Hi-Pass (low filter) Inputs - the
Hi-pass input provides signal attenuation below 20 Hz for systems having
acoustic feedback or rumble problems. Wide band input extends from 2 Hz to 160
kHz.
Rackmounting - are standard rack heights and
provide EIA standard spacing for rack mounting holes. Proper rear support
should be provided ,should extended transportation in a rack be anticipated.
Transission Line - this amplifier may be
connected directly to 25 volt transmission systems and through appropriate
transformers to 70 volt system.
Forced Air Cooling - for special application
where high ambient temperatures and /or very low impedance loads are
encountered, we offer the 4301 Rack Mount Fan System.
2401
Specifications
Minimum
Continuous RMS Power Per Channel (both channels driven 20 - 20,000 Hz at rated
Distortion):
250 watts at
8 ohms
375 watts at
4 ohms
Total
harmonic Distortion (from 250 mW to full rated power/at 1 watt): less than 0,025%/0,02%
Intermodulation
Distortion (from 250 mW to full rated
power): less than 0,025%
Clipping
head Room: 0,5 dB
Damping
Factor: 60
Freuency
Response:
Rated Power
: 20 Hz to 20 kHz +0, -0,5 dB
1 Watt
[Normal/Hi-Pass]: 2 Hz - 160 kHz / 20 Hz
- 160 kHz +0,25, -3 dB
Signal-to-Noise
Ratio:
Rated Power
(unweighted): 110 dB
Rated Power
(IHF-a): 125 dB
1 Watt
(IHF-A): 100 dB
Crosstalk
(100 Hz to 10 kHz): greater than 70 dB
Input
Sensitivity:
Rated Output
: 2,24
1 Watt :
0,14
Current Slew
Rate: 20 amps/microsecond
Slew
factor: 3
Protection: Relay, Thermal, Low Impedance
Dimensions
(W x H x D): 483 x 178 x 318 mm
(19" x 7" x 12,5")
Weight: 21,3 kg (47 lbs)