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Amplifier sections react rapidly to musical transients for precise drive and control of loudspeakers.
Unit features exceptionally wide bandwidth, independent of negative feedback, improving transient accuracy and phase linearity.
Designed for low distortion and wide bandwidth without high negative feedback, improving dynamic accuracy.
Employs discrete electronic circuitry for high performance, avoiding integrated circuits.
Unique circuitry guards amplifier from speaker/wire issues without impairing sound quality.
Unit designed for 120V AC operation. Use domestic outlets only to prevent fire hazard.
Disconnect by pulling the plug, not the cord. Avoid damage, kinks, or heavy objects on the cord.
Install on a firm, level surface away from moisture, direct sunlight, heat, cold, dust, or poor ventilation.
Do not tamper with internal components to prevent shock and maintain performance. Consult service if foreign objects enter.
Wipe with a soft dry cloth. Use mild soapy water if necessary, then dry. Avoid harsh chemicals and sprays.
Turn off, unplug, and contact service if abnormal smell or smoke is detected.
Find warranty card, keep it safe. Warranty is two years. Consult manual or service station for issues.
Turn off components before connecting. Use correct color plugs for Left/Right channels. Connect tape decks to TAPE 2.
Connect remote sensor to REMOTE IN jack. Compatible with other Harman Kardon units with Remote Out.
Use high-quality cables. Check impedance when connecting two pairs to avoid overheating.
Plug cord into a polarized wall socket. Remove cord from outlet when not in use for prolonged periods.
Use receptacles for other components. Switched powers with amplifier; Unswitched powers always.
Press to turn the unit on and off.
Plug in headphones. Output supplied to headphones when speaker switches are off.
Push to select speaker sets (1, 2, both, or neither for headphones).
Press buttons to select the desired input source.
Turn to increase or decrease the proportion of low frequency sound.
Turn to increase or decrease the proportion of high frequency sound.
Adjust relative output level of left and right speakers.
Turn to raise or lower output volume.
Remote keys function like amplifier controls. Can control other HK components. Requires AA batteries.
Effective within 7m and 30° angle. Avoid fluorescent lights, dust, or blocking line of sight.
Turn volume down, power on, select speakers, choose source, play component, adjust volume/tone controls.
Select source, make recordings on tape decks 1 or 2. Monitor tape deck 2. Copy tape from deck 1 to deck 2.
Ensure unit is plugged into a live outlet.
Check speaker switches, function button, volume, and wire connections.
Verify speaker wires and connection wires are correctly connected and balance control is centered.
Check speaker wire connections for correct left/right wiring.
Ensure unit is away from fluorescent lights, TVs, motors, and other electrical appliances.
This function is not possible. Use Tape 2 for monitoring.
Disconnect AC power for 5 minutes, then reconnect. Check batteries and sensor.
Connect ground wire, keep cables away from power cords, move turntable from speakers/appliances.
Amplifier sections react rapidly to musical transients for precise drive and control of loudspeakers.
Unit features exceptionally wide bandwidth, independent of negative feedback, improving transient accuracy and phase linearity.
Designed for low distortion and wide bandwidth without high negative feedback, improving dynamic accuracy.
Employs discrete electronic circuitry for high performance, avoiding integrated circuits.
Unique circuitry guards amplifier from speaker/wire issues without impairing sound quality.
Unit designed for 120V AC operation. Use domestic outlets only to prevent fire hazard.
Disconnect by pulling the plug, not the cord. Avoid damage, kinks, or heavy objects on the cord.
Install on a firm, level surface away from moisture, direct sunlight, heat, cold, dust, or poor ventilation.
Do not tamper with internal components to prevent shock and maintain performance. Consult service if foreign objects enter.
Wipe with a soft dry cloth. Use mild soapy water if necessary, then dry. Avoid harsh chemicals and sprays.
Turn off, unplug, and contact service if abnormal smell or smoke is detected.
Find warranty card, keep it safe. Warranty is two years. Consult manual or service station for issues.
Turn off components before connecting. Use correct color plugs for Left/Right channels. Connect tape decks to TAPE 2.
Connect remote sensor to REMOTE IN jack. Compatible with other Harman Kardon units with Remote Out.
Use high-quality cables. Check impedance when connecting two pairs to avoid overheating.
Plug cord into a polarized wall socket. Remove cord from outlet when not in use for prolonged periods.
Use receptacles for other components. Switched powers with amplifier; Unswitched powers always.
Press to turn the unit on and off.
Plug in headphones. Output supplied to headphones when speaker switches are off.
Push to select speaker sets (1, 2, both, or neither for headphones).
Press buttons to select the desired input source.
Turn to increase or decrease the proportion of low frequency sound.
Turn to increase or decrease the proportion of high frequency sound.
Adjust relative output level of left and right speakers.
Turn to raise or lower output volume.
Remote keys function like amplifier controls. Can control other HK components. Requires AA batteries.
Effective within 7m and 30° angle. Avoid fluorescent lights, dust, or blocking line of sight.
Turn volume down, power on, select speakers, choose source, play component, adjust volume/tone controls.
Select source, make recordings on tape decks 1 or 2. Monitor tape deck 2. Copy tape from deck 1 to deck 2.
Ensure unit is plugged into a live outlet.
Check speaker switches, function button, volume, and wire connections.
Verify speaker wires and connection wires are correctly connected and balance control is centered.
Check speaker wire connections for correct left/right wiring.
Ensure unit is away from fluorescent lights, TVs, motors, and other electrical appliances.
This function is not possible. Use Tape 2 for monitoring.
Disconnect AC power for 5 minutes, then reconnect. Check batteries and sensor.
Connect ground wire, keep cables away from power cords, move turntable from speakers/appliances.
The Harman Kardon HK620 is an integrated amplifier designed to provide high-quality audio performance. It combines pre-amplification and power amplification into a single unit, making it a central component for a stereo audio system. The amplifier is engineered with several advanced features to ensure accurate and dynamic sound reproduction.
The primary function of the HK620 is to amplify audio signals from various source components, such as CD players, tuners, tape decks, and video players, and then output these amplified signals to loudspeakers. It acts as the control center for your audio system, allowing you to select different input sources, adjust volume, and fine-tune the sound characteristics.
Key features contributing to its performance include:
The amplifier also supports recording functions, allowing users to record from selected sources to one or two tape decks simultaneously. It provides a direct record output signal that is not affected by the volume, bass, treble, or balance controls, ensuring a pure signal for recording.
The HK620 offers a user-friendly interface with intuitive controls for managing your audio experience.
Maintaining the HK620 involves simple care routines to ensure its longevity and optimal performance.
Power| continuous average power per channel (8 Ohms) | 40 Watts |
|---|---|
| continuous average power per channel (4 Ohms) | 60 Watts |
| dynamic power (8 Ohms) | 70 Watts |
| dynamic power (4 Ohms) | 100 Watts |
| dynamic power (2 Ohms) | 135 Watts |
| high instantaneous current capability (HCC) | +40 Amps |
| power supply | AC120V, 60Hz (or AC230V, 50Hz) |
| power consumption | 160W (180W for 230V version) |
Audio Performance| frequency response | 0.5Hz - 100kHz |
|---|---|
| damping factor | 120 |
| signal-to-noise ratio (Tuner/CD) | 98dB |
| signal-to-noise ratio (Phono MM) | 80dB |
| signal-to-noise ratio (Phono MC) | 75dB |
| tone control range (Bass @ 50Hz) | +10dB |
| tone control range (Treble @ 10kHz) | +10dB |
Input Specifications| input sensitivity/impedance (Tuner/CD) | 135mV/22kΩ |
|---|---|
| input sensitivity/impedance (Phono MM) | 2.2mV/47kΩ, 125pf |
| input sensitivity/impedance (Phono MC) | 120 nV/56 Ohms |
| phono-overload (Phono MM) | 100mV |
| phono-overload (Phono MC) | 5mV |
Weight and Dimensions| dimensions (Width x Height x Depth) | 17-3/8 x 4 x 14-1/8" (443 x 104 x 359mm) |
|---|---|
| weight | 16.3lbs/7.4kg |
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