Technics Su-610 Black Audio Equipment

The Technics SU-610 is a vintage stereo integrated amplifier that was part of Technics' "New Class A" line, likely produced around 1990. It's generally regarded as a solid, reliable, and good-sounding amplifier from that era.

Here's a summary of its key features and specifications:

Key Features:

Integrated Amplifier: Combines a pre-amplifier and power amplifier into one unit, simplifying your audio setup.
New Class A Circuitry: Technics' "New Class A" design aimed to combine the sound quality benefits of Class A amplification (low distortion) with the efficiency of Class B, reducing heat and improving overall performance.
Multiple Inputs: Typically includes inputs for:
Phono (MM - Moving Magnet cartridge) for connecting a turntable.
CD
Tuner
AUX (Auxiliary) for other audio sources.
Tape (usually two sets for tape decks, with monitoring capabilities).
Speaker Outputs: Can connect to two pairs of speakers (A and B), allowing for bi-wiring or driving speakers in another room.
Tone Controls: Features Bass and Treble controls for adjusting the frequency response, along with a Loudness control to boost bass and treble at low listening volumes.
Headphone Output: A standard 1/4" (6.35mm) jack on the front for private listening.
Rec Out Selector: Allows you to record from different sources independently of what you're listening to.
Direct/Line Straight: Some models may have a "Direct" or "Line Straight" button that bypasses the tone controls for a purer audio path.
Solid Build Quality: Technics products from this era were generally well-built and durable.
Key Specifications (approximate, as found in common listings and manuals):

Power Output: Around 30 watts per channel into 8Ω (stereo). Some sources suggest up to 35W into 8Ω or 45W into 6Ω (0.7% THD) during burst power.
Frequency Response: 3Hz to 80kHz (-3dB) for line inputs (CD, Tuner, AUX, Tape). Phono input is RIAA equalized.
Total Harmonic Distortion (THD): Typically very low, around 0.07% (or even lower for certain power levels/frequencies).
Damping Factor: Around 40.
Input Sensitivity:
Phono (MM): 2.5mV / 47kΩ
Line (CD, Tuner, AUX, Tape): 150mV
Signal-to-Noise Ratio (SNR):
Phono (MM): 68dB
Line (CD, Tuner, AUX, Tape): 70dB (or higher, sometimes specified as IHF A-weighted at 90dB+)
Speaker Load Impedance: 4Ω to 16Ω (when using A or B speakers), 8Ω to 16Ω (when using A and B simultaneously).
Dimensions: Approximately 430 x 125 x 320mm (W x H x D).
Weight: Around 6.3kg to 8kg.

The Technics SU-610 is a vintage stereo integrated amplifier that was part of Technics' "New Class A" line, likely produced around 1990. It's generally regarded as a solid, reliable, and good-sounding amplifier from that era.

Here's a summary of its key features and specifications:

Key Features:

Integrated Amplifier: Combines a pre-amplifier and power amplifier into one unit, simplifying your audio setup.
New Class A Circuitry: Technics' "New Class A" design aimed to combine the sound quality benefits of Class A amplification (low distortion) with the efficiency of Class B, reducing heat and improving overall performance.
Multiple Inputs: Typically includes inputs for:
Phono (MM - Moving Magnet cartridge) for connecting a turntable.
CD
Tuner
AUX (Auxiliary) for other audio sources.
Tape (usually two sets for tape decks, with monitoring capabilities).
Speaker Outputs: Can connect to two pairs of speakers (A and B), allowing for bi-wiring or driving speakers in another room.
Tone Controls: Features Bass and Treble controls for adjusting the frequency response, along with a Loudness control to boost bass and treble at low listening volumes.
Headphone Output: A standard 1/4" (6.35mm) jack on the front for private listening.
Rec Out Selector: Allows you to record from different sources independently of what you're listening to.
Direct/Line Straight: Some models may have a "Direct" or "Line Straight" button that bypasses the tone controls for a purer audio path.
Solid Build Quality: Technics products from this era were generally well-built and durable.
Key Specifications (approximate, as found in common listings and manuals):

Power Output: Around 30 watts per channel into 8Ω (stereo). Some sources suggest up to 35W into 8Ω or 45W into 6Ω (0.7% THD) during burst power.
Frequency Response: 3Hz to 80kHz (-3dB) for line inputs (CD, Tuner, AUX, Tape). Phono input is RIAA equalized.
Total Harmonic Distortion (THD): Typically very low, around 0.07% (or even lower for certain power levels/frequencies).
Damping Factor: Around 40.
Input Sensitivity:
Phono (MM): 2.5mV / 47kΩ
Line (CD, Tuner, AUX, Tape): 150mV
Signal-to-Noise Ratio (SNR):
Phono (MM): 68dB
Line (CD, Tuner, AUX, Tape): 70dB (or higher, sometimes specified as IHF A-weighted at 90dB+)
Speaker Load Impedance: 4Ω to 16Ω (when using A or B speakers), 8Ω to 16Ω (when using A and B simultaneously).
Dimensions: Approximately 430 x 125 x 320mm (W x H x D).
Weight: Around 6.3kg to 8kg.