Does it work with alexa?

Yes, I have an echo dot connected via the 3.5mm socket, the amp drives speakers in an old radiogram.

Can this play music straight from an external hard drive via the usb?? And if so, does the display show whats on the drive?

Have not tried that - Maybe if drive self powered and file structure suitable - but why would you - the SD card slot works very well…

Can you disconnect the radio? When you move from line in to Bluetooth it passes through radio and you get a blast of white noise.

Turn the volume down before you switch modes would be my solution

Can i connect my jpl speakers to this amp?

Not sure what jpl speakers are but you can hard wire any speakers as usual to the amp with + and - twin speaker cable.

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🎤 Amplify your moments—power, precision, and wireless freedom in one sleek package!

ROOM FILLING POWER - 40W + 40W stereo output delivers immersive sound that commands attention in any space.
EFFORTLESS OPERATION - LCD display and remote control put full command at your fingertips, whether you’re hosting at home or cruising in your car.
SEAMLESS BLUETOOTH 5 0 - Instantly connect your devices with stable, high-quality wireless audio streaming—ditch the cables, keep the vibe.
MULTI INPUT VERSATILITY - Supports AUX, RCA, USB, SD, and Bluetooth inputs for ultimate compatibility with all your favorite devices.
PRECISION SOUND CONTROL - Customize your audio experience with dedicated bass, treble, and volume knobs—because your playlist deserves perfection.

The LiNKFOR Bluetooth Amplifier ULKPW138us delivers a robust 40W+40W stereo output with Bluetooth 5.0 connectivity, multi-input support (AUX, RCA, USB, SD), and customizable bass/treble controls. Compact and lightweight with an LCD display and remote, it’s designed for seamless use in home, car, or karaoke setups, offering a premium audio experience with effortless control.

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Manufacturer	LiNKFOR
Part number	ULKPW138us
Item Weight	350 g
Product Dimensions	15.5 x 8.5 x 4.5 cm; 350 g
Batteries	1 Lithium Metal batteries required. (included)
Item model number	ULKPW138us
Colour	Black
Style	With Bluetooth Receiver
Material	Aluminium
Voltage	13.5 Volts
Plug profile	Surface Mount
Special Features	Bluetooth connectivity, Ease of setup, Sound quality, Support 3.5mm, RCA, USB, SD, BT Input, Remote Control
Batteries included?	Yes
Batteries Required?	Yes
Battery Cell Type	Lithium

LiNKFORBluetooth Amplifier 40W+40W Stereo Audio Amplifier for Speakers, Sound System with Bass/Treble Control, LCD Display, Remote, Multi-Input AUX RCA USB SD, Home, Car & Karaoke Use

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