Pioneer Reel-To-Reel Recorder, Receiver, AudioControl Equalizer

Pioneer DEQ-S1000A Universal Digital Sound Processor(DSP) and 4 Channel Amplifier

AVH-W4400NEX - 7 - Android Auto™/Apple CarPlay™ (wired/wireless), Bluetooth®, AppRadio®Mode+ - Multimedia DVD Receiver

McIntosh C42 Analog Preamplifier With Exclusive 8-Band Equalizer and P

Cambridge Audio AXR100 Stereo receiver with Bluetooth® at Crutchfield

Front Stereo Amplifier High/Mid/Bass Adjuster, 3-Channel Mixer, USB 5V Power Supply - AliExpress

High Fidelity 1986: Vol 36 Index : Free Download, Borrow, and Streaming : Internet Archive

Pioneer RT-1020L Reel To Reel Recorder

AudioSource EQ One II Equalizer

Pioneer RT-707 Reel to Reel Tape Recorder Manual