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:::현재위치 HOME ▶ 중고/위탁제품 ▶ AMP ▶ Audia STRUMENTO No 4 mk2 Stereo Power/ STRUMENTO No 1 mk2 Stereo Preamp
    
 
 
Audia STRUMENTO No 4 mk2 Stereo Power/ STRUMENTO No 1 mk2 Stereo Preamp
판매가격 :  
소비자가격 :  
주문수량 :
제조사 : Audia
원산지 : 이탈리아
합계금액 :  
  ▷ 간단한 설명
  Stereo, full balanced preamplifier
 
   
 


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STRUMENTO N°4 mk2 Stereo Power Amplifier


The Strumento N°4 mk2 Stereo Power Amplifier is a close to perfection state of the art two channel power amplifier that exhibits incredible response speeds (bandwidth greater than 1MHz), high output power (up to 900 Watts), and nearly unlimited speaker driving/control capability. 
For the mk2 version we’ve used our experience in designing its sibling the Strumento N° 8 Mono-block Power Amplifier as well as our trained human ears to aide us to further refine the original Strumento N°4 circuit (such small, but critical changes include the value of resistors and capacitors). 
This effort has allowed us to more closely achieve our goal of sonic perfection with the Strumento N°4 mk2, much like a luthier uses years of experience, craftsmanship, and keen ear to find the perfect tonal character and emotional response for their instruments.

The Strumento N°4 mk2’s chassis begins its life as an ultra high grade, bespoke aluminum cast. After the CNC finishing work is completed, every part is then closely inspected and “mirror polished” by hand. Some critical areas are further finished by hand, with shot peening and anodization completing the beautiful metal work. The final touch is an elegant silk-screening process.

Within the beautiful casework of the Strumento N° 4 mk2 one finds yet more attention to detail and incredible Italian craftsmanship. There you will find a fully balanced circuitry, carefully selected ultra high grade components throughout, a massive power supply built with extra low impedance, 
ultra high grade capacitors (280.000µF alone on the main power supply), custom printed boards with an extra high-grade surface copper, and ultra pure copper bars in the output stages. But we have chosen to not stop there with the Strumento N° 4 mk2 Stereo Power Amplifier! The Strumento N° 4 mk2’s power supply is comprised of two super high current power supplies per channel and four stabilized independent stages for each channel: two for the input stages and two for the Audia Flight current feedback stage. The gain stage’s power supply is designed to achieve extremely low noise, the filter is made by ultra-fast rectifiers and extra low impedance capacitors. Two 150VA toroidal audio transformers are used for the main stages and one 15VA toroidal transformer is used for the logic control and protections. The main power supply is made by n.28 10.000µF 40V extra low impedance capacitors. No fuses are found in the main power supply for the output stage (we find fuses are like a “resistors” and can negatively impact the sound), instead a current sensor read by microprocessor is employed.

The amplifier’s gain stage is an exclusive Audia Flight design consisting of an entirely class A current-feedback circuitry. 
To further isolate this critical part of the amplification process from interference and grant thermal stabilization for all of its discrete components, the gain stage is enclosed within an aluminum box and encapsulated in an epoxy resin. Meanwhile, the output stage of the Strumento N°4 mk2 is powered by a massive 3000VA custom made audio transformer, encapsulated by epoxy resin and sealed within two ferromagnetic shields. 
Ultra-fast rectifiers instead of fuses are used on the main power supply for the output stage.

With every circuit detail addressed, we then turn to mechanical details to complete this masterpiece! When the amplifier is on a shelf, 
the power transformers, located on an independent chassis, are physically decoupled from the audio circuit chassis, thus discharging to ground any spurious vibrations from the transformers should they be present.

A masterpiece in aesthetics and electronics in a single chassis, the Strumento N°4 mk2 Stereo Power Amplifier is surpassed only by a pair of its sibling the Strumento N° 8 Mono-block Power Amplifier.



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STRUMENTO N°1 mk2 Stereo Preamplifie​



It has long been said, “the heart of any audio system is the preamplifier.” The preamplifier’s job sounds simple: convey a purity of sound, without 
coloration or adulteration of original audio signal, with nothing being added but also nothing being lost in translation. 
Okay, so it’s not that easy. And yet that’s where our efforts at Audia Flight have elevated the preamplifier state of the art. 
The Audia Flight Strumento N°1 mk2 Stereo Preamplifier is the perfect device to transfer a perfect signal to any power amplifier with its precision, accuracy, dynamics and incredible signal speed (bandwidth more than 1MHz). We’ve used our trained human ears to aide us with circuit refinements over the original Strumento N°1 (such small, but critical changes include the value of resistors and capacitors). This effort has allowed us to more closely achieve our goal of sonic perfection with the Strumento N°1 mk2, much like a luthier uses years of experience, craftsmanship, and keen ear to find the perfect tonal character and emotional response for their instruments.

The Strumento N°1 mk2 chassis begins its life as an ultra high grade, bespoke aluminum cast. After the CNC finishing work is completed, every part is 
then closely inspected and “mirror polished” by hand. Some critical areas are further finished by hand, with shot peening and anodization completing the 
beautiful metal work. The final touch is an elegant silk-screening process.

Within the Strumento N°1 mk2’s gorgeous chassis one finds it is powered by four toroidal transformers (two 75VA toroidal audio transformers for the main 
stages, one 25VA toroidal audio transformer for the control boards, and one 15VA toroidal transformer for the logic board), all enclosed within a 
ferromagnetic shield and encapsulated by epoxy resin. The main power supply is extremely low noise, the filter being made by ultra-fast rectifiers and 
n.40 680µF 100V extra low impedance capacitors. On the electrolytic capacitors an EMI shield and vibration damping material is used to reduce any 
physical noises to a minimum.The main power supply is composed of eight, very low noise power supply stages. Each amplification channel with its fully 
balanced circuitry is on an independent print board. Custom printed circuit boards with an extra high-grade surface copper are used, as ultra pure copper 
bars are used for ground and power supplies. After the input selection and a buffer, the input signal meets the volume control.

A crucial point in all preamplifiers is represented by the volume control. Often the volume control can introduce a variable impedance element as a 
function of the attenuation value (that is to say, the position of the potentiometer). The undesirable result is that the frequency response, slew-rate 
and even the internal impedance couplings among different stages are not fixed and become a function of the attenuation value (volume). 
This ultimately reduces the preamplifier’s ability to produce an accurate signal for the power amplifiers to further amplify. For this reason, Audia Flight 
has developed a constant impedance attenuator. This custom Audia Flight attenuator is composed of discrete components 
(low-noise metallic film resistors and relays) and provides a gain range as high as 127 dB while providing constant steps of 0.5 dB. 
The accurate high-performance result we have obtained with this attenuator likely is well beyond standard attenuators found elsewhere, 
as our measurements show that the Strumento N°1 mk2 has an out of the ordinary extended frequency response (3Hz / 1MHz –3 dB) and the high value of 
slew rate (>250V/µs throughout the entire gain range (-90 / +10 dB). 
This completely new volume control has constant impedance and it is absolutely silent as the volume is raised and lowered.

The Strumento N°1 mk2’s gain stage is an exclusive Audia Flight design consisting of an entirely class A current-feedback circuitry. 
It is fed by four stabilized independent stages per each channel: two for the input stages and two for the output stage. 
The gain stage is enclosed within an aluminum box and encapsulated by epoxy resin to grant a thermal stabilization for all gain stage’s components. 
Additionally, a large aluminum plate is used to dissipate thermal energy of the gain stages. 
The high-current low-noise output stage is made of Class A biased MOSFET audio devices, and is able to drive any kind of amplifier.

Aa modular system of cards for MM/MC phono inputs; SPDIF and USB 192kHz/32bits digital inputs; analog unbalanced and balanced inputs; 
and other options (inquire)




Technical Data
  • Press
  • Inputs2 balanced XLR and/or unbalanced RCA ; 3 balanced XLR only
    Outputs2 balanced XLR and 1 unbalanced RCA
    Gain range-90 dB / +10 dB
    Gain resolution0.5 dB
    Frequency response (1W RMS -3dB)1 Hz ÷ 1 MHz
    Slew-Rate (@ 8 ohm)/strong>> 200 V/µS
    THD< 0,05 %
    S/N Ratio105 dB
    Input impedance10pF 15 kOhm balanced or unbalanced
    Output impedance5 Ohm
    Main voltage AC (50-60Hz)100, 110-115, 220-230,240 V
    Stand-by Power consumptionless than 0,5W
    Nominal Power consumption90W
    Dimensions and weight450x120x450mm (W x H x D) - 28kg
    Shipping dimensions and weight580x300x580mm (W x H x D) - 40kg

      

    Output power per channel Watts RMS @ 8/4/2 Ohm250/500/900W
    Gain29 dB
    Input sensitivity1.41 Volts RMS
    Frequency response (1W RMS -3dB)0,3 Hz ÷ 1 MHz
    Slew-Rate (@ 8 Ohm)> 200 V/µS
    THD< 0,05 %
    S/N Ratio110 dB
    Input impedance Unbalanced7,5 kOhm
    Balanced7,5 kOhm
    Damping factor (@ 8 Ohm)> 1000
    Main voltage AC (50-60Hz)100, 110-115, 220-230, 240 V
    Stand-by Power consumptionless than 1W
    Nominal Power consumption (no signal)400W
    Power consumption (260W RMS @ 8ohm both channels driven)1000W
    Dimensions and weight450x280x500mm (W x H x D) - 95kg
    Shipping dimensions and weight580x410x700mm (W x H x D) - 125kg
     
     
     
     

    1. 우체국등기소포(우편)으로 전국 어느 곳이든 3~4일 이내 배송이 가능합니다. (공휴일 제외)
    2. 온라인 송금을 하신 경우에는 입금확인후 익일부터 배송 기간에 포함합니다. 천재지변 등 불가항력적인 사유 발생 시 그 해당기간 동안은 배송기간에서 제외합니다.
    3. 주문하신 상품이 훼손되어 배달된 경우, 상품을 수령한 날로부터 20일내에 구매를 취소하실 수 있습니다.
    4. 고객께서 온라인 송금으로 결제하셨을 경우 고객의 은행계좌로 송금하는 방법으로 환불하여 드립니다.
    5. 주문하신 상품이 물류 특성상 다른 시간대에 배송이 될수도 있습니다.
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