HiFi Audio Field Effect Tube Class A Power Amplifier Preamp Treble Bass Tone Board Infrared Remote Upgrade B Version

Options Difference:
1: upgraded version (A or B), the effect is better than the old version; upgraded version A and the upgraded version B have the same effect;
2: If you choose our case, choose "Upgrade A", which is easy to install, save money, and has good effect (recommended）

Specifications:
- Input impedance: 40K ohm, suitable for CD or decoder audio source
- Bandwidth: 18HZ-52KHZ (extensive at both ends)
- Input voltage: 2Vpp
- Maximum output voltage: 10Vpp
- Magnification: 1 times, pure tone processing
- Motherboard size: 100MM*100MM
- Transformer size: 50MM*50MM* high 43MM installation hole distance 60MM

Reminder: This preamp is Class A, after 30 minutes of warm-up, the sound is better than when it is just started.