데논 PMA-757 인티앰프입니다. (84년 발매)
110V
434 x 136 x 413 (w) x (h) x (d)
Continuous Power 4Ω: 100 + 100 Watts
Continuous power 8Ω: 80 + 80 Watts
Harmonic Distortion: 0.05 % at rated output
스피커 A/B, A+B
트로이달 트랜스와 포노단 MM, MC 선택기능을
채용하는 등 데논에서 신경써서 만든 제품입니다.
내외관 모두 민트급이며 홈잡을 곳없이 모든 상태 아주 좋습니다.
조작시 일체의 잡음없으며 저렴한 기격으로 데논의 고품질 음질을
즐기실 수 있습니다.
실물사진이며 사진보다 실물이 더 좋습니다.
안전하게 포장해서 책임배송으로 보내드립니다.
부천에서 출발하는 고속버스 가능합니다.
착불 **만원
010-3151-3159
직거래는 온수역인근입니다.
Specifications:
1. General
System: Integrated Transistor Amplifier
Colour: 1=Silver, 2=Black: 1; 2 (woodcase)
Pre Amplifier
Inputs: Phono MM+MC; CD; Tuner; AUX; Tape
Quadro: no
Signal/Noise High Level: 110 db
Frequency Response Phono MM: RIAA (±0.3 dB)
Signal/Noise Phono MM: 87 db
Signal/Noise Phono MC: 70 db
Power Amplifier
Speaker Outputs: 2 x 2 Speakers; Phones
Continuous Power 4Ω: 100 + 100 Watts
Continuous power 8Ω: 80 + 80 Watts
Frequency Response: 1-200,000 (+0/-3 dB) HZ
Harmonic Distortion: 0.05 % at rated output
2. Physical
Dimensions in mm: 434 x 136 x 413 (w) x (h) x (d)
Weight in lbs: 26.5 lbs
Weight in Kg: 12 Kg
HIGH SPEED DUAL SUPER NON·NEGATIVE FEEDBACK CIRCUIT
Dual super Non-NFB circuit clearly eliminates static distortion generated at output transistors. This techhnique reduces static distortion. to essentially zero. The signal itself is not fed back to the input, and the dynamic characteristcs of the amplifier are greatly improved. High slew rates of ±2oo V Ips, have been achieved.
WIDE FREQUENCY BAND EQUALIZING AMPLIFIER
Conventional NF and CR equalizers have been improved to produce a high quality "wide-frequency-band equalizer". Distortion caused by changes in input impedance is minimized. As a result, a 90 dB S/N ratio for MM cartridges (75 dB for MC) was achieved. Also, a RIAA curve deviation of only ±0.2 dB from 20 Hz to 100 kHz has been attained.
COMPLETE ELIMINATION OF CAPACITORS FROM SIGNAL PATH
Direct DC survo circuitry completely eliminates large-capacity coupling capacitors. These capacitors badly degrade signal quality from signal path. As a result of the new circuitry, the music source can be clearly and accurately reproduced.
A HEAVY DUTY POWER SUPPLY
The PMA-757's high capability, stable power supply section consists of a high performance oversized torodial power transformer and a large capacity block capacitor to achieve superb regulation and S/N ratio.
PROTECTION CIRCUIT FOR SAFETY
If an unexpected problem occurs, such as speaker terminal short or generation of direct current in the output, the protection circuit functions simultaneously. This prevents speaker and amplifier damage. A muting circuit is also provided in order to eliminate noise generated at power "on-off".
POWERFUL DRIVING CAPABILITY
The heavy duty power supply can provide adequate power to drive speakers with a low 4 ohm impedance. Output performance is impressive:
100 WRMS per channel from 20 Hz to 20 kHz
Also dynamic headroom of 3.0 dB is assured.
ELEGANT DESIGN
The DENON design is not only elegant, but also functionally efficient. Due consideration to internal structure and careful selection of parts prevent system components from deteriorating.
OTHER FEATURES
• DAD terminal
• High speed protection circuitry without deterioration of sound quality
• A high speed protection circuitry
• Easy to operate push-button function selector
• Illuminated functions for improved legibility
• 2 sets of speaker terminals (A or B, A+8, off)
• 2 sets of tape deck I/O terminals
• 1 phono terminal accepts MM or MC Phono Cartridges
• Subsonic filter for eliminating unnecessary low audio frequencies of iess than 20 Hz (6 dB/oct)
As you can see the PMA 757 was designed without the faults of the past and to address the then digital age. Plus the build quality was very high indeed when compared with units from other manufacturers. For this period of time Denon raised the bar very high in design and execution of the PMA 757.
