9-band EQ equalizer: With independent and rich frequency band control (20Hz/60Hz/125Hz/250Hz/500Hz/1KHz/2kHz/6KHz/16KHz), within -6dB to +6dB range. With 2 groups of RCA inputs and outputs, without plugging in and out cables repeatedly. High-performance: The SNR of EQ9 exceeds 111dB, combined with a frequency response range of 20Hz-20kHz, with a distortion level as low as 0.001%, ensuring perfect reproduction of audio signal. Bypass design and balance adjustment: with bypass mode to turn off EQ preamplification, the audio signal will output from IN to OUT directly without any processing, convenient to enjoy original sound. Also with a balance control to compensate for the left and right channel of all outputs and prevent the sound field positioning from deviating from the center positio.
eBay
EQ-898BT HIFI Digital HD Stereo Preamplifier Equalizer Built-In USB Bluetooth Home Stage Equalizer Dual 10 Segments 220V
Aliexpress UK
EQ bypass:bypass the graphic equalizer in the signal path. 1 Audio Equalizer. With noise reduction function of cutting-edge noise gate. Signal to noise ratio: 82dB. 1 Power Cord. Sound transmission gain: -1dB or 11dB.
eBay
ZK-MT21 2*50W+100W Bluetooth 5.0 Power Subwoofer Amplifier Board 2.1 Channel Class D Home Theater Audio Stereo Equalizer Amp
Aliexpress UK
EQ bypass:bypass the graphic equalizer in the signal path. 1 Audio Equalizer. With noise reduction function of cutting-edge noise gate. Signal to noise ratio: 82dB. 1 Power Cord. Sound transmission gain: -1dB or 11dB.
eBay
AIYIMA EQ Equalizer Board Stage Professional Tone Preamplifier Amplifier Stereo 5/10/15 Road Preamp Equalizer Power Supply
Aliexpress UK
9-band EQ equalizer: With independent and rich frequency band control (20Hz/60Hz/125Hz/250Hz/500Hz/1KHz/2kHz/6KHz/16KHz), within -6dB to +6dB range. With 2 groups of RCA inputs and outputs, without plugging in and out cables repeatedly. High-performance: The SNR of EQ9 exceeds 111dB, combined with a frequency response range of 20Hz-20kHz, with a distortion level as low as 0.001%, ensuring perfect reproduction of audio signal. Bypass design and balance adjustment: with bypass mode to turn off EQ preamplification, the audio signal will output from IN to OUT directly without any processing, convenient to enjoy original sound. Also with a balance control to compensate for the left and right channel of all outputs and prevent the sound field positioning from deviating from the center positio.
eBay
AIYIMA EQ Equalizer Board Stage Professional Tone Preamplifier Amplifier Stereo 5/10/15 Road Preamp Equalizer Power Supply
Aliexpress UK
5-band EQ preamplifier: adopt 5PCS JRC4558 op amp, each one is responsible for one frequency band and process the audio signal independently. 5-band separate control knob, easily to control and set the freqency range as you like. Bypass design suits more use: with bypass button to turn off EQ preamplification, the audio signal will output from IN to OUT directly without any processing, convenient to enjoy original sound.
eBay
AIYIMA EQ Equalizer Board Tone Amplifier Preamp Stage Professional Adjustable Frequency Stereo 7 Road Preamplifer Equalizer
Aliexpress UK
It uses constant Q technology, and each frequency point has a push-pull potential. The graphic equalizer is simple in structure, intuitive and clear, so it is widely used in professional audio. Gross weight: 2.5KG.
eBay
EQ Equalizer Stage Professional Tone Preamplifier Amplifier Board 5/10/15 Road Preamp Stereo Adjustable Frequency 35HZ 70HZ-20KH
Aliexpress UK
5-band EQ preamplifier: adopt 5PCS JRC4558 op amp, each one is responsible for one frequency band and process the audio signal independently. 5-band separate control knob, easily to control and set the freqency range as you like. Bypass design suits more use: with bypass button to turn off EQ preamplification, the audio signal will output from IN to OUT directly without any processing, convenient to enjoy original sound.
eBay
WA60 60W*2 ESS9023 WiFi and Bluetooth HiFi Stereo Class D Digital Multiroom Amplifier with Tadil Airplay Equalizer Free App
Aliexpress UK
Model: EQ665. It uses constant Q technology, and each frequency point has a push-pull potential. The graphic equalizer is simple in structure, intuitive and clear, so it is widely used in professional audio.
eBay
Hifi EQ665 Equalizer Amp Preamplifier Home EQ Balanced Mixer Double 10 Segment Stereo Treble Alto Bass Tone
Aliexpress UK