Still fine to use if you don't mind this.
eBay
New Car Amplifier Volume Regulator Speaker Bass Controller Car Audio Amplifier Sound Adjuster Subwoofer Amplifier
Aliexpress UK
• Model: AC2 RV-BASS. • Lightweight, portable, and ready to play anywhere.
eBay
Fosi Audio 300Wx2 HiFi Sound Power Amplifier Upgrade New TPA3255 Class D Stereo Amp With Treble Bass For Home Speaker
Aliexpress UK
Vox "BASS" Flag. Used on bass speaker cabs such as the JMI Vox T.60, AC-100 Bass and AC-100 heads.
eBay
Fosi Audio TB10A TPA3116D2 Stereo Amplifier Receiver 2 Channel Mini HiFi Power Amplifier Audio For Home Speakers Bass Treble
Aliexpress UK
Vox "Foundation Bass" Flag. Used in the lower right hand corner of Foundation Bass cabs.
eBay
Home Power Amplifier RMA 4.0 Bluetooth Bass Amp 4Ω-16Ω HIFI Digital Audio Amplifiers FM Amplifier HiFi Stereo Amplifier
Aliexpress UK
eBay
ST-838 HIFI Amplifier 2.1 Channel Car MP3 Mini Amp AUX Input High and Low Bass Adjustment Super Bass 20Wx2+40W Amplifier
Aliexpress UK
• ✅ Classic VOX AC30 tone with authentic overdrive. • ✅ Compact headphone amp for electric guitar. • Works out of the box – no extra setup needed. • ✅ Made in Japan – high build quality.
eBay
Fosi Audio Mono Amplifier Subwoofer Amp 100W With Bass Power Amplifier For Home Passive Speaker M04
Aliexpress UK
Your amp is covered by Stetsom’s international one-year warranty. Stetsom has support centers in several countries, including the US. Stetsom Vulcan 3000 2 Ohms 8000W RMS Full Range Amplifier. They are excellent with bass as well as with voice.
eBay
Fosi Audio TP-02 Subwoofer Amplifier HIFI Amplifier Chip TDA7498E Mini Sub Bass Amp Digital Class D Integrated Amplifier 220W
Aliexpress UK
Still ok to use if you don't mind this.
eBay
Sound Amplifier for Car Channel 2.0 HIFI Bluetooth Amplifiers Home Digital Audio DC 12V Amp AK380 Amplifiers for Car Bass Treble
Aliexpress UK