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JC-TU98E 80W+80W Bluetooth Tube Preamplifier Bluetooth DAC Amp Bluetooth 5.0 Black 6J1 Version
Features:
- TDA7498 chip for power output. Minimum load impedance 4Ω per channel. Maximum load stands at 160W 4Ω@400W power supply.
- Compatible with 32V 5A power supply, enabling load up to 80W 4Ω per channel. For larger power output, you can replace it with power supply 32-36V larger than DC 10A.
- 2-Channel Switchable Audio Inputs: It supports one-channel RCA analog audio input and one-channel wireless Bluetooth input. The Bluetooth audio input is in priority. Lossless audio switching is finished via relay.
- CD-Level Music Quality: Bluetooth 5.0 QC3003 Bluetooth program + PCM5102A decoder chip are used for amazing sound quality.
- Preamplifier Circuit: It is designed with bass and treble knobs. Dual tubes soften its sound. 
① Power Switch: Pull up to turn it on. Pull down to turn it off. LED indicator is on when it is powered on.
② Low Frequency Adjustment: When the knob tick marks the 12 o'clock position, it is 0DB. Rotate to the left for low frequency attenuation and to the right for low frequency increase.
③ High Frequency Adjustment: When the knob tick marks the 12 o'clock position, it is 0DB. Rotate to the left for low frequency attenuation and to the right for low frequency increase.
④ Volume Knob: Rotate to the left for volume - and to the right for volume +.
Attention: In case of damage to your speakers caused by exceeding volume when it is powered on, please turn the volume down the the minimum volume before using. 
⑤ Bluetooth Antenna Port: Bluetooth antenna is used to make receiving signal more stable.
⑥ Bluetooth Indicator: Red and Blue lights flash in intervals, which means it is searching and waiting to match. Blue light is on steadily, which means that is is connected.
⑦ RCA Analog Audio Signal Input: R for right-channel input and L for left-channel input.
⑧ Right-Channel Output for Amplifier: Red one for + and Black one for - . Minimum impedance is 4Ω. Please use it with speakers ≥4Ω.
⑨ Left-Channel Output for Amplifier: Red one for + and Black one for - . Minimum impedance is 4Ω. Please use it with speakers ≥4Ω.
⑩ Power Supply Input Port: Please use DC power supply 24V-36V. DC 32V and DC36V are recommended.
Package Included:
- 1 x Bluetooth Tube Preamplifier 
