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:::현재위치 HOME ▶ 진공관 앰프 ▶ Audio Research(오디오리서치) Reference 750 SE 진공관 파워앰프
    
 
 
Audio Research(오디오리서치) Reference 750 SE 진공관 파워앰프
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Audio Research(오디오리서치) Reference 750 SE 진공관 파워앰프


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The new flagship amplifier, the Reference 750SE features an upgrade from the KT120 to the KT150 output tube, as well as a number of active and passive parts changes. The sonic improvements are dramatic.

The Reference 750SE monoblock amplifiers continue a heritage that began nearly 20 years ago with the introduction of the Reference 600. The goal was to create an ultimate, tube-driven amplifier with enough power to drive any speaker load, and deliver and exceptional musical experience.  The Reference 750SE redefines all expectations of what is possible from an amplifier of the highest order.  It is the culmination of everything Audio Research knows about amplifier design and manufacture – High Definition in its purest, most dynamic form.

The Reference 750SE is prepared to deliver 750 watts of power into speaker loads of 4, 8 and 16 ohms.  This is achieved by the use of a massive, custom- built power transformer delivering current from sixteen KT150 vacuum tubes.  Thanks to extensive testing and strict selection of tubes, the amplifier requires little maintenance and obviates the need for costly and sonically deleterious automatic bias systems.  Power supply regulation is also achieved by vacuum tube with a 6550WE and 6H30 driver.  The bulk power supply energy storage has been increased to 1300 joules, a 30% increase over the preceding REF610T.  Tube bias is controlled by two KT150 tubes, each driving a bank of eight tubes.

What can you expect to hear in the REF 750SE upgrade? Immediately apparent is much greater purity, transparency, and soundstage focus. The sense of environment is appropriately larger, with greater air and refinement. Micro dynamics are even better, with improved speed and snap. The music is more immediate, more vibrant, and alive.



POWER OUTPUT
750 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 0.5% at 750 watts, below .04% at 1 watt. Approximate actual power available at “clipping” 850 watts (1kHz). (Note that actual power output is dependent upon both line voltage and “condition” i.e. if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical.)

POWER BANDWIDTH
(-3dB points) 15Hz to 150kHz.

FREQUENCY RESPONSE
(-3dB points at 1 watt) 1 Hz to 200 kHz.

INPUT SENSITIVITY
4.6V RMS Balanced for rated output. (24 dB gain into 8 ohms.)

INPUT IMPEDANCE
200K ohms Balanced.

OUTPUT TAPS
4, 8, 16 ohms.

OUTPUT REGULATION
Approximately 0.5dB 16 ohm load to open circuit (Damping factor approximately 17).

OVERALL NEGATIVE FEEDBACK
13dB.

SLEW RATE
20 volts/microsecond.

RISE TIME
1.5 microseconds.

HUM & NOISE
Less than 0.2mV RMS – 110dB below rated output (IHF-A weighted, input shorted, 16 ohm output).

POWER SUPPLY ENERGY STORAGE
Approximately 1300 joules.

POWER REQUIREMENTS
105-130VAC 60Hz (260-750VAC 50Hz) 2100 watts at rated output, 2400 watts maximum, 800 watts at “idle”.

TUBES REQUIRED
8 Matched pair KT150 Power Output; 1 6550WE Regulator; 1 6H30 Regulator Amplifier; 1 matched pair KT150 Driver; 1 6H30 follower.

DIMENSIONS
13.5″ (34.3 cm) W x 23″ (58.4 cm) H x 20.8″ (52.8 cm) D. Handles extend 1.5″ (3.8 cm) forward and rearward.


 
 
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