9 . 4 P O W E RA M P L I F I E R S E C T I O N( I D L E C U R R E N T }

1.Set BASS and TREBLE controls ro center position.

2.Nothing should be connected to the INPUT jacks of SX-450 and an 8 ohm dummy load should be connected across the SPEAKER terminal.

3.A DC voltmeter should be connect across

between terminal number 19 1+;, 20 (-) for Left channel and 18 1+1, l7 (-) for Right channel.

4.Cut the jumper lead, if the voltage less than 15mV .

DC Voltmeter

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Pioneer sx-450 manual FNt#

sx-450 specifications

The Pioneer SX-450 is a revered receiver that has left its mark on the audio world since its introduction in the mid-1970s. Recognized for its impressive performance and classic design, the SX-450 remains a favorite among vintage audio enthusiasts and collectors.

One of the standout features of the SX-450 is its power output. Capable of delivering 22 watts per channel into 8 ohms, it offers a warm, rich sound that appeals to audiophiles who appreciate the nuances in their music. The receiver is designed to accommodate a wide range of speakers, making it a versatile choice for different audio setups.

In terms of connectivity, the Pioneer SX-450 is fitted with multiple input options, including phonograph, tape, and auxiliary inputs. This allows users to connect a variety of sources, such as turntables, cassette decks, and CD players. This versatility makes it a suitable receiver for both modern and vintage audio gear, providing audiophiles the opportunity to enjoy their extensive music collections.

Tuning capabilities are another highlight of the SX-450. It features a built-in FM stereo tuner with a wide frequency response and excellent selectivity, ensuring that users can access their favorite radio stations with clarity and precision. The receiver's tuning is complemented by a well-illuminated dial and a tuning needle that allows for easy signal acquisition, enhancing the user experience.

The design of the SX-450 is classic and appealing, featuring a brushed aluminum faceplate that exudes vintage charm. The control knobs are large and intuitive, allowing for easy adjustments of volume and tone settings. The eye-catching dial lights emit a warm glow, inviting users to enjoy their listening experience even in low-light conditions.

The Pioneer SX-450 also incorporates advanced technologies for its time, including a low-noise transistor design that minimizes distortion for cleaner sound reproduction. Its discrete output stage architecture enhances audio fidelity, ensuring faithful reproduction of recordings.

Durability is another characteristic of the SX-450, built to withstand years of use while maintaining optimal performance. This longevity contributes to its status as a sought-after vintage receiver, coveted for its nostalgic value and superior audio quality.

Overall, the Pioneer SX-450 is more than just a receiver; it represents a period in audio history where quality and craftsmanship were paramount. Skilled engineering, classic style, and impressive sound make the SX-450 a timeless piece of audio equipment that continues to resonate with music lovers today.