Low filter, high filter, bass turnover frequency, treble turnover frequency and presence. Selecting any of these five did not seem to effect the output of the amplifier. A lovely solidly built machine.
eBay
AK35 800W Home Power Amplifiers 2 Channel Bluetooth 5.0 Surround Sound FM USB Remote Control Mini HIFI Digital Amplifier Stereo
Aliexpress UK
The Rare Onix OA21s Integrated Amplifier in black is a high-quality audio component perfect for home audio and hi-fi systems. With stereo L/R RCA audio inputs and outputs, this amplifier offers 2 channels of sound with 6 inputs for versatile connectivity. Made in the United Kingdom, the Onix brand ensures reliable performance and top-notch audio quality. The sleek black design adds a touch of elegance to any home audio setup, making it a stylish and functional addition to your sound system.
eBay
Nobsound Mini Bluetooth 5.0 TPA3116 Digital Audio Amplifier HiFi Class D Stereo Power Amp 100W*2 for Home Speakers
Aliexpress UK
There's a large ¼" (6.35mm) headphone socket too, ideal for high-quality listening without disturbing those who might not share your great taste in music. Soon you?ll be playing the records you've been saving for, and planning what to buy next.
eBay
AK380/AK35/AK370/280/AK270/AK170 800W 12V Home Car Hifi Power Amplifiers Stereo BASS Audio Speaker Class D Car Home Sound Amp
Aliexpress UK
The TOA System VM-2120 Management Amplifier is a high-quality integrated amplifier designed for home audio and HiFi systems. With a sleek black design, this unit offers seven audio inputs and outputs for a versatile and efficient audio setup. The TOA brand is known for producing reliable audio equipment, and the VM-2120 model lives up to this reputation with its superior sound quality and performance. Perfect for enhancing your sound and vision experience, this amplifier is a must-have for any audio enthusiast.
eBay
AIYIMA A01 TPA3116 Amplifier Audio Class D Sound Power Amplifier HiFi Music Stereo Amplificador Home Theater Amp
Aliexpress UK
Roksan kandy k2 integrated amplifier this does not come with the remote it was lost in a move its in good condition but has a few surface scratches on top from the move this has been reflected in the price
eBay
2*50W Bluetooth 5.0 Power Amplifier Class D Audio 10W~200W HiFi Stereo Wireless Music Player Mini USB Sound Card App Digital AMP
Aliexpress UK
Experience quality sound and exceptional flexibility with the AXA35, the perfect way to start discovering hi-fi music. You will not be disappointed. The short video was the AXA35 hooked up to my Polk es20 speakers & using the aux port on front with iPhone to demo working order.
eBay
AIYIMA 2PCS GE 5654W GE5654 Vacuum Tube Valve Vacuum Electronic Tube Upgrade For 6J1 6m1 6AK5 6J1P EF95 Audio Amplifiers
Aliexpress UK
Pathos TT RR single ended Class A Hybrid integrated Amplifier. All the tube goodness, but with solid state power. The classic version comes with a 24 step remote, this is the RR (References Remote) version that comes with 63 volume steps (1dB each) and uses silver wiring in the signal wiring. About £7k new - not sure how old this one is because I’m the second owner, but it all works and sounds amazing. Comes with original wood crate, collection from OX29 due to weight. Demo upon collection welcome. Will include some spare pairs of 12AX7 driver tubes, including some Mullards, JJ mesh plates/ frame grid and some sovtek Tesla when you collect. Stock photos used as it’s currently in storage, but what you get is the same.
eBay
500W IRS2092S HIFI Digital Power Amplifier Board Class D Mono Audio Amplifier Moudle with Speaker Protection for Car Subwoofer
Aliexpress UK
Powers on unable to test further no remote hence selling spares or repair few small marks and scratches but good condition overall
eBay
TOPPING L70 Full Balanced NFCA Headphone Amplifier 4Pin XLR/4.4 Balanced/6.35mm SE Output Amp with Remote Control
Aliexpress UK