I cant get the slide controls to change any kind of frequency. Can you help?

There is a button that says EQ , if you do not engage the EQ your in bypass mode and there will be no Equalization . So press that button , but turn the volume to a lower level , because when the the EQ is engaged the volume will bump up . And also make sure your connections are correct, stereo out to EQ in . If your not sure if your hook up is correct refer to you Stereo owners manual.

How does the spectrum analyzer work

It's fake- it doesn't represent anything other than the overall level with a completely made-up representation of frequencies.

i have a sherwood receiver and yamaha speakers for outside deck,would this eq work for this?

Depends upon the inputs and outputs for your receiver. Also depends upon whether your receiver supports an equalizer loop. Also depends upon whether you pipe other sources into your receiver or not. Don't take this equalizer outdoors, of course.

Rockville Apm10b 10 400w Power Supply Active Studio Subwoofer Pro

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Description

Rockville REQ42-B Black 19" Rackmount 2x21 Band Equalizer with Spectrum Analyzer 19" Rackmountable
Dual Channel 21+21 Band Graphic Equalizer (Total 42 Bands) Blue LED on each equalizer slide control
RCA Stereo Input: DVD/Tape/Tuner/AUX-MP3 with Front Panel Selector Switch RCA Stereo Record Output

The Rockville REQ42-B is a professional dual 21-band graphics equalizer designed for precise audio control in live and studio environments. 19" rack-mountable form factor and removable brackets allow for easy integration in standard setups. This unit features RCA stereo input with front panel selector switch, dedicated RCA record output, and a 3.5mm MP3/iPod input jack on the front panel for added convenience. A total of 42 frequency bands each pair with a blue LED slider for precise adjustments from 20Hz to 20kHz. Multi-color LED display, individual LED indicators and dual VU meters provide real-time visual feedback for audio level. Weighing in at just 6 pounds, the REQ42-B offers professional functionality with a durable, compact chassis that runs on a 110V AC power source. Perfect for DJs, sound engineers and audio enthusiasts, this equalizer is a reliable solution for live sound enhancement, studio mixing, or optimizing sound with home audio systems

Specifications

ASIN	B00LZDSL7U
Amazon Bestseller	#1,098,277 in Automotive ( See Top 100 in Automotive ) #119 in Car Component Subwoofers
Color Name	Black
Customer Reviews	3.9 3.9 out of 5 stars (1,025)
Date First Available	September 26, 2014
Is Discontinued By Manufacturer	No
Item model number	REQ42-B
Standing screen display size	19 Inches

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Rockville APM10B 10" 400W Power Supply / Active Studio Subwoofer Pro Reference Sub REQ42-B

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