Soulnote A-1 Integrated Amplifier
Perfectly balanced, discrete non-NFB circuits
To extract the best from the unique characteristics of SOULNOTE's original perfectly balanced non-NFB discrete circuits, the amplifiers were re-examined for possible improvements such as incorporating star wiring in the ground plane, centralizing non-NFB local regulators, and implementing feedforward. routes, optimized drive current settings and much more, which helped achieve even greater brightness and speed, as well as provide a wider audio range.
Specifications-
Relay-switching balanced attenuator
The volume control in the A1 does not use a conventional rotary or electronic volume control. Instead, it uses a newly developed relay attenuator style balanced configuration. This dramatically increases clarity, and allows the sound image to emerge in three dimensions. It also significantly improves quality at low volume levels without fear of gang errors.
Direct mechanical grounding construction
Spikes connect to the bottom of the transformer's center of gravity to directly expel harmful vibrations without interfering with the unit housing itself. This achieves both supremely vibrant musical expression and a high S/N.
Symmetrical housing with resonance control
The housing's symmetrical construction increases rigidity balance while controlling the sharpness of resonance (Q factor). This eliminates the usual sensation of sound containment in highly rigid systems and creates the high resolution, expansive SOULNOTE sound. The newly developed, heavyweight aluminum front panel design also helps control resonance.
Metallic insulators as standard equipment (when under load)
Though plastic insulators are the conventional standard, we now use metallic insulators since they promote higher sound quality.
In addition to a newly developed bifilar wound, large capacity toroidal transformer with independent positive and negative windings, we have lowered the impedance by connecting multiple high-voltage, small-capacity filter condensers in parallel and incorporating a fast recovery rectifier diode. We have also completely refined the smallest details in order to boost the power supply, such as making current loops as short as possible by placing the rectifier diode close to the power transformer. This further increases S/N and speed.
Power Design by Soulnote A–1
The current line-up Soulnote is based on new design concept.
Maximum output
80W ×2 (8ohm), 120W ×2 (4ohm)
Total harmonic distortion
0.08% (30W 8ohm)
Frequency characteristic
SPEAKER (8ohm 1W): 3Hz to 300kHz (±1.0dB
Input sensitivity/impedance
LINE1 (balance): 700mV/16kohm
LINE2, 3, 4: 700mV/8kohm
S/N ratio
110dB (IHF A network)
Power voltage
230V AC 50Hz
Power consumption
190W, 90W (during idling)
Maximum external dimensions
Main unit: 430(W)×109(H)×418(D)mm
Weight
10,0kg
Included accessories
Remote control, Spikes, Power cord
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