Use our AIYIMA Tube T6 PRO preamp ,Meet your a variety of application scenarios,enjoy the HiFi music!(This is a Tube Preamplifier,Not a Amplifier) PC-USB input does not support U-disk.Use the Bluetooth modes,pls install the bluetooth antenna,thanks! Adopt 6Ж1п-EB tube vacuum design Tube Can replacement:such as 6J1, 6J2, 6AK5, 6AK5W, 6F31 ,6BA6, 6K4п, GE5654, 6Ж1п,etc You can upgrade it to vintage American or European tubes as like. RCA /3.5mm headphone output Headphone output is suitable for 16~300Ω headphones and headsets(With priority) Note: When the 3.5mm headphone output and AUX output are connected at the same time, only the 3.5mm headphone output works. If you need AUX output working, please unplug the headphone output RCA output to powered speaker,digital amplifier&passive speaker QCC3008 Bluetooth 5.0 Support APT-X,APT-X LL,Stable, efficient and faster Bluetooth search"BT HiFi Audio",pls install the bluetooth antenna Product model TUBE-T6PRO Working voltage DC 12V (With 12V 1.5A power supply) Frequency response range 20Hz-20KHz (±6dB) Audio input Bluetooth 5.0/PC-USB/RCA Audio output RCA/3.5mm headphone jack Chip architecture QCC3008+CM6642+97220+ME5562P Signal to noise ratio ≥110dB (when RCA input) Distortion 0.02% PC-USB input sampling rate 24bit/192kHz, support XP/W7/w8/W10/MAC/Linux Headphone impedance 16-300Ω Input sensitivity 0.775V RCA output level 1.4Vrms High and bass gain ± 6dB Product size 128*133*33mm (length * width * height) Machine weight 0.48kg/1.05Ib Package weight 0.8kg/1.28Ib Tube Preamplifier Tube Preamplifier Tube Headphone Amp 100*2 Tube Amplifier 100W*2 Tube Amplifier MM Phono Preamp Buying Options Buying Options Add to Cart Buying Options Add to Cart Add to Cart Customer Reviews 4.4 out of 5 stars 291 4.2 out of 5 stars 190 4.4 out of 5 stars 227 4.2 out of 5 stars 155 4.3 out of 5 stars 530 4.2 out of 5 stars 144 Price — no data — no data $96.29$96.29 — no data $105.59$105.59 $55.99$55.99 Model TUBE T7 TUBE A3 PRO T8 TUBE T4 T9 TUBE T3 Bluetooth Bluetooth 5.0 Bluetooth 5.0 Bluetooth 5.0 Bluetooth 5.1 Bluetooth 5.0 - no data Max power Output - no data - no data no data 100W+100W 100W+100W - no data Audio Input Bluetooth/RCA Bluetooth/AUX Bluetooth 5.0/PC-USB/RCA Bluetooth/AUX Bluetooth 5.0 / USB / Coaxial / Optical / stereo RCA AUX,MM phono Audio Output Amplifier + Powered Speaker Amplifier + Powered speaker RCA/3.5mm headphone output Passive Speaker AUX/RCA Powered speaker,Amplifier Work Voltage AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V Input voltage DC 12V DC 12V DC 12V DC 24V-32V DC 18V-30V DC 12V