In the world of audio engineers, club sound designers and professional grade home theater systems EQ’s are one of the most priceless pieces of gear you have at your disposal. No matter where you are or what room you may be in the frequencies of music will vary depending on the architecture of the room set up. Finding the right sound or that “Sweet Spot” is where a professional EQ will come into play. Technical Pro’s EQ7153 dual 21 Band Professional EQ was designed with exactly this in mind. Their superior design and quality parts once again sets this EQ apart from the rest! The ABILITY TO ADJUST 21 BANDS OF FREQUENCIES is a sound designer’s dream come true! This unit will give you so much control over your sound that after you integrate it into your studio, mobile rig or venue you will wonder how you ever survived without it! The EQ7153 is built with superior parts and will hold up under very tough conditions. This unit will work for a mobile rig or in the studio. The removable rack mountable brackets will allow you to fit it into any standard rack. You can connect up to 4 sources using the RCA inputs. Connect such sources as a CD player, DVD player audio, tuner etc. An additional input is available for an iPod, iPhone or MP3 player. Connect your iPhone or iPod by using the MP3 input and play your songs through this system! The outputs consist of an RCA record and main out which can easily be integrated into any sound system.

Dual 10 Band Stereo Equalizer with Spectrum Analyzer Display! All led sliders!

Product Description

Ultra-Compact 9-Band Graphic Equalizer with FBQ

Amazon.com

If we all lived in a perfect world, there would be no need for audio equalization. Sound systems would be perfect and would reproduce perfect signals in all their glorious perfection. Also, everyone in that perfect world would like the same amount of bass, midrange and high frequency, and there would be no such thing as feedback. But the world isn’t perfect, is it? Even the best sound system can benefit from the use of a good EQ–like the FBQ800.

Even the best sound system can benefit from the use of a good EQ. Click to enlarge.

1/4-inch and RCA inputs and outputs.

Nine steps of graphic EQ.

How Does it Work?
Imagine the frequency range of the sound you hear as a highway, a very wide one with nine lanes. Each of these “lanes” represents a single octave of the sonic spectrum. The first four lanes, labeled 63 – 500 (Hz) contain the really low frequency sound content, mainly bass, bass vocals, and the kick and tom drums. The three lanes labeled 1 k, 2 k and 4 k (Hz), make up the fundamental zone of most musical instruments and the male and female vocals. 8 k and 16 k cover the frequency range of cymbals, snare drums and higher pitched percussion instruments. The FBQ800 allows you to control the flow of audio traffic in each of these nine lanes. When properly applied, EQ makes it possible to hear all of these frequency ranges equally, thus the term equalization.

Feedback Elimination
When a specific frequency, or range of frequencies, reaches too high a level, feedback occurs–that all-too-familiar squeal or howl you get when the mic is too close to the speaker. Basically, feedback happens when there is so much of a particular frequency that it is picked up by the mic and run through the system again. That’s why feedback typically gets louder and louder the longer it’s allowed to occur. Needless to say, this kind of feedback is very undesirable.

This is where the FBQ800’s Feedback Detection System really works its magic. In this ingenious circuitry, LEDs on the individual faders light up when that frequency band is approaching the danger zone. All you need do is lower the illuminated slider until the LED blinks out–voilá, feedback problem solved! What once required a highly trained ear is now an activity that even a child can master.

Sonic Toolkit
That really is the best way to describe the FBQ800. With its nine frequency bands, you easily fine-tune your sound and instantly eliminate feedback. And each fader can be used to boost or cut the frequency range it controls by as much as 12 dB (and that’s a lot!).

Special attention is paid to the low frequency zone. In addition to low frequency faders, the FBQ800 features a Low Cut filter for removing unwanted low frequencies such as fl oor rumble, room resonance, electrical hum, etc. This is especially handy if your system is being used for speech rather than music.

To Boost or to Cut, That is the Question
Raising and lowering specific frequency bands can improve the frequency response of any room’s acoustics. For instance, if the room you’re in is “bass-heavy,” lowering the 63 and 125 Hz faders can help eliminate an overall “boomy” or “muddy” sound. Likewise, gently boosting the 8 and 16 k sliders can add sparkle to a somewhat “dark” mix. Are the vocals getting lost in the mix? Raising the level of the 1 k slider can help bring them out.

It’s important to note that raising a single fader level is not always the best solution; it’s often better to lower the bands surrounding the frequency you want to bring out, and then boost the overall volume level to achieve better headroom.

Built for Accuracy and Reliability
Speaking of headroom, FBQ800’s 6-digit LED Input/Output meters and level control are provided for precise level maintenance. Longterm reliability is ensured, thanks to high-quality illuminated faders and switches, and our ultra low-noise audio operational amplifiers provide outstanding sonic performance. In addition, all Mini Series components may be stacked to create an ultracompact signal processing solution.

What’s in the Box
Behringer FBQ800 Ultra-Compact 9-Band Graphic Equalizer, Power Supply, User’s Manual

Features:

req20: dual 10 band graphic equalizer

dual 10 band graphic equalizer (20 bands total)

frequency response: 20Hz – 20khz

dual Vu meters level monitor

blue LED on each equalizer slide control

stereo RCA line input

stereo RCA line output

stereo RCA line output for record

vacuum fluorescent display

bass/midrange/high EQ controls

separate left/right channel volume gain control

signal to noise Ratio: >88db

input power: AC 110V 60H/220V 50hz

110/220V switchable

front panel power switch

removable rack mount brackets

dimensions: 17"(19" w/brackets) x 9" x 2.2&Quot;

weight: 5 lbs.

Rockville REQ42-S

The Rockville REQ42-S is a 19” rack mountable equalizer that has individual LED
indicators and RCA outputs. It has a frequency response of 20-20,000 Hz and a
Signal to Noise Ratio Signal to Noise Ratio of 80dB. This equalizer has a weight
of 6 lbs.
Features:
Rockville REQ42-S Silver 19" Rack Mount 2 x 21 Band Equalizer w/Spectrum
Analyzer

19" Rack Mountable

Dual Channel 21+21 Band Graphic Equalizer (total of 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

Front Panel 3.5mm iPod/MP3 Player Input Jack

Dual VU Meters Level Monitor

Individual LED Indicators

Outputs-RCA (REC, Mail)

Multi Color LED Display

Low/High Function

Frequency Response: 20-20,000 Hz

Signal to Noise Ratio: 80dB

Removable Rack Mount Brackets

Key Operation:
M (short press) — mode switching
▲ (short press) — increase brightness
▼ (short press) — decrease brightness
(recommended brightness value 2-4)

M (keep pressing) + ▲ (short press) — increase spectrum speed
M (keep pressing) + ▼ (short press) — decrease spectrum speed
(recommended speed 3-4)

▲ (long press) — switch between LIN (line input) and MIC (microphone input)
▼ (long press) — switch between L (low gain) and H (high gain) (the best is L by default, can choose H for car spectrum MIC input)

NOTE: the setting values need to maintain 30 seconds before they can be automatically saved.

Connection:
Audio terminal input adopts 3.5mm male headphones, connect it to computer headphone output interface via the audio branch, the other end of the branch connects external audio equipment. Please check whether the audio cable or branch has good contact if the audio has noise or the spectrum has background noise under mute and MIC off mode when using.

Potentiometer Function:
Input adjustment potentiometer: for adjusting the input signal, for example, the input signal can be attenuated if it is too strong, or adjust this potentiometer to shield some equipment which have strong background noise. Spectrum display amplitude potentiometer: for adjusting the maximum display amplitude after AGC (Automatic Gain) process. After setting, the automatic gain will take this setting value as the maximum amplitude to adjust automatically.(turning to the end can turn off AGC function if you don’t need it)

Package Includes:
1× AS1424 Music Spectrum
1× USB Cable
1× 3.5mm Male to 2*Female Plug

Pyle Model : PTA62BT.5

Bluetooth Home Audio Amplifier, 6-Ch. Audio Source Stereo Receiver System with FM Radio, MP3/USB/SD/AUX Playback (750 Watt)

Features:

Bluetooth Connectivity:

What’s in the Box:

Technical Specs:

This 750-watt amp brings music to the living room with crystal clear clarity. With plenty of inputs, you won’t find this amplifier lacking. It features a built-in FM radio with digital LCD display. It’s equipped with RCA inputs on the back and two ¼” mic jacks on the front, so you can turn this amp into a karaoke machine – even add an echo effect. Easily adjust the volume, balance, treble, bass on the master output for total control of your sound. Remote is already included. Runs on 110 and 220 V AC.

Specifications:
Material: Metal
Color: Black
Input Impedance: 22KΩ
Output Impedance: 200Ω
Frequency Response: 20Hz~20KHz
Total Harmonic Distortion: 0.05%（1KHz）
Signal to Nosie Ratio: >90dB
Plug: US
Working Voltage: 110-240V
Item Size: 48 * 12 * 4.5cm / 18.9 * 4.7 * 1.8in
Item Weight: 2kg / 4.4lb
Package Size: 56 * 26 * 10.5cm / 22 * 10.2 * 4.1in
Package Weight: 2.5kg / 5.5lb

Package List:
1 * Equalizer
1 * Power Cable (US)
1 * User Manual (English)