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Stereo Class A Power Amplifier
Price: $ 13,999.00 / each
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Warranty and considerations: |
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| Warranty Terms (Parts and Labor) |
3 years |
| Mail order? |
This Esoteric component is not available mail order. If you do not have a local dealer, please contact us, we can usually get Esoteric to allow us offer you their products. |
| refurb/ exhibit stock |
We have an exhibit stock A-03 amplifiers available. Please call or email sales@spearitsound.com for more information. These are available nationally. |
| Free Shipping to the Continental US? |
YES! |
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Esoteric A-03 Stereo Class Power Amplifier
Advanced power supply with dedicated L/R dual mono architecture
The new A-03 employs dedicated dual mono technology that established
Esoteric's reputation for high-end design implementation. Equipped with
independent power sections featuring dedicated toroidal transformers for the
left and right channels, this amplifier also boasts enhanced mechanical strength
and rigidity. Separate dedicated compartments for the power transformer, the
power circuits and the voltage and current amplifier stages, all help to prevent
electrical interference between components.
Realizing the highest expression of purity with independently mounted high
capacity toroidal transformers
The power section of the current amplifier stage-which drives the
speakers-features independent, large volume toroidal transformers, mounted on
the left and right channels. This enhances the amplifier's ability to supply
current to each channel's speakers, while preventing interference between the
channels. By using an independent transformer and power circuit for the voltage
amplifier stage, which drives the current amplifier stage, the effect of
variations in the voltage is suppressed and the current amplifier receives a
stable power supply. Separating each circuit block into power circuits and
providing independent transformers reduces cross channel interference and
enables both robustness and a delicacy of expression within the music.
An amplifier circuit with wide range, high speed, and powerful drive
A pure class A implementation with low distortion and high linearity is used
for the amplifier circuit. This design always ensures an idling current that can
output a minimum of 100 watts RMS into 4 ohms and a minimum of 50 watts RMS with
an 8 ohm load. BTL mode is also available and allows 200 RMS into 8 ohms. This
provides excellent responsiveness for sudden bursts of high volume demand, as
well as high purity of expression. Large transistors with a current supply
ability of 17 amps. for continuous output, and 34 amps. for sudden bursts of
high output, are used for the current amplifier stage. Five of these transistors
are mounted in a parallel push-pull configuration for each channel, driving all
speakers without compromise
Can be used as a mono power amplifier with a bridged connection
By using the A-03 as a monaural power amplifier in bridged (BTL), mode, a
minimum output of 200 watts at 8 ohms (1 kHz, 8 ?) can be achieved (400 watts at
4 ohms in BTL mode).
Obsessive use of high grade components everywhere
We have gone to extremes to use the highest quality components to maintain
signal clarity and minimize transmission loss. For connection terminals, the
amplifier uses the XLR input terminal-which is highly reliable and provides
excellent contact-along with ESOTERIC's original RCA input terminal. In
addition, the WBT nextgen; WBT-0710Cu speaker terminals have conductor cores of
pure copper with gold plating to achieve high conductivity and low resistance.
On top of this, we have used ultra high grade components such as an electrolytic
capacitor and a high frequency/low impedance transistor. These components were
selected based on property examination and trial listening. It is an Esoteric
requirement that all critical components undergo exhaustive listening tests
before any final section is made.
A highly rigid structure to prevent circuit interference and suppress
resonance
The A-03 features a highly rigid body construction that surpasses a great
number of power amplifiers. The amplifier's mass of about 38 kg presages
excellent musical purity protected by thick steel. The internal circuit
components are separated into dedicated inner compartments for each circuit,
partitioned by 2 mm steel walls. Combined with a 5 mm steel bottom chassis,
interference between circuits is prevented and the adverse effects of resonance
caused by internal and external vibrations are minimized. Also, the unique
chilled steel pinpoint feet provide a very strong four-point support system for
the heavyweight housing.
ESOTERIC design forms a beautiful musical space
A combination of blast finishing and short scratch finishing on the 20 mm
thick aluminum panels create a beautiful contrast. With its elegant rounded form
and large heat sink, processed from symmetrically-placed black alumite, the A-30
contributes to an elegant audio space, creating a sense of beautiful integration
with ESOTERIC's other high end products.
Now equipped with warm-up mode
This function enables the device to be warmed up to play music, while
reducing electric power consumption (As compared to normal operation). At
warm-up mode: power consumption of 220 watts (a reduction of about
45%).
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