Klein + Hummel ES20 Stereo Integrated Amplifier

The Klein + Hummel ES20 is a vintage German stereo integrated amplifier, renowned for its solid engineering, warm analog sound, and elegant wooden cabinet. Originally developed by Klein + Hummel and based on RFT electronics, the ES20 features both moving magnet and crystal phono inputs, making it ideal for classic turntables and vintage hi-fi systems.

### Specifications

- Model: Klein + Hummel ES20
- Type: Stereo Integrated Amplifier
- Power Output:
- 2 × 20 W into 4–16 Ω
- Frequency Response: 20 Hz – 20 kHz
- Total Harmonic Distortion (THD): <0.5%
- Inputs:
- Phono Magnetic (MM)
- Phono Crystal
- Radio (Tuner)
- Tape
- Outputs:
- Speaker outputs (4–16 Ω)
- Dual headphone outputs
- Features:
- Built-in MM phono preamplifier
- Separate crystal phono input
- Bass, treble and balance controls
- Balance control
- Loudness (Contour) function
- Mono switch
- Audio filter
- Real wood cabinet
- Brushed aluminum front panel
- Power Consumption: 60 W
- Dimensions (W × H × D): Approx. 430 × 140 × 300 mm
- Weight: Approx. 8 kg
- Power Supply: 220–240 V AC

### Condition

- Tested and in good working order.
- Cosmetic condition is consistent with age, with visible signs of normal use.