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SPL SPQ20

4-Band Parametric Pre-Amp Equalizer w/ Gold Plated RCA Connections and Fader Control

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List price $149.99

$39.99

with warranty

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SPQ20 Features:
  • 4-Band Parametric Pre-Amp Equalizer
  • Master volume control dial
  • Front and Rear fader control
  • Input selector for radio and CD
  • Adjustable input gain for CD and Radio sources
  • Gold plated RCA contacts
  • 4 Band variable frequencies:
    • Band 1: (60-150 Hz
    • Band 2: (200-400 Hz
    • Band 3: (1,200-2,500 Hz
    • Band 4: (7,500-15,000 Hz
  • Subwoofer crossover frequency: 30-250 Hz
  • Frequency Response: 20-25,000 Hz
  • Front CD/Auxiliary switch
  • Signal-to-Noise ratio: 115 dB
  • 8V output voltage
  • DC to DC switching power supply
  • Requires a power, remote, and ground connection to operate
  • Includes mounting hardware
  • Color: Black
  • Dimensions: 5"D x 6-7/8"W x 1-1/8"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty
Connectivity:
  • Inputs:
    • CD
    • Radio
  • Outputs:
    • Front Speakers
    • Rear Speakers
    • Subwoofer

Equalizer Specifications

Type of Equalizer
This determines the way the equalizer processes the signal from the source unit. A parametric equalizer allows to you adjust the center point of the frequency band you are adjusting as well the bandwidth which can be narrowed or widened. A graphic equalizer has fixed frequency bands and bandwidth and only the frequency bands can be adjusted. A digital equalizer uses a software program to tune your system.
A graphic equalizer typically has more adjustable bands and is less expensive, whereas a parametric will have fewer bands but offer a greater level of control and provide more tuning options. Digital equalizers will tune your system with the most detail and precision but require a computer and are typically a little higher in price.
Parametric
Equalizer Bands
The number of graphic or parametric equalizer bands the receiver has. The better the EQ, the more likely you will be able to "tweak" your sounds to your desire.
4 band
Equalizer Frequencies
The frequency range that allows control of the center frequency of each equalization band.
60 - 15,000 Hz
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
High-pass (HP)
Full (AP)
Built-in Bass Reconstruction
Bass reconstructors, or bass enhancers, improve low frequency reproduction in a car audio system with at least one subwoofer. These bass expander products will help your subs produce accurate bass thumps.
No
Line Driver
A line driver is a small amplifier used to support the strength of the audio signal coming from the source unit.
No
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Total Number of Inputs
This is the total number of input connections that go into the unit.
2
Total Number of Outputs
This is the total number of output connections that the unit will produce.
3
Button Color
Refers to the color of the physical buttons on the unit.
Red
Signal Boost/Cut
The available signal boost or cut for each of the frequency bands.
18 dB
Max Output Level
The maximum level (in volts) of signal output. A higher level will increase the clarity and boost your signal.
8 volts
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
20 - 25,000 Hz
THD (Total Harmonic Distortion)
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
0.05%
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
115 dB
Width
The width of the item from left to right (side-to-side) measured in inches.
6-7/8"
Height
The height of the item, measured from top to bottom, in inches.
1-1/8"
Depth
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
5"

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
78%
4 Star
11%
3 Star
11%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.7
Value
4.9
Features
4.6
Design
4.8
Usability
4.3

Big Cat

Seattle, WA

Overall
Durability
Value
Features
Design
Usability

Great sound & great deal

September 12, 2011

I've been experimenting with a few configurations over the past two years and without a doubt, this EQ delivers the best tonal quality as compared to a standard graphic EQ. Of course, these opinions are subjective, but I really stand behind my recommendation for this product. I can't complain about any noise issues, and certainly there are many EQ's that will introduce quite a bit of hiss to your system. The SPL SPQ20 has a very high Signal to Noise Ratio, higher than most other EQ's I've seen. That's a good thing and a good spec to be on the lookout for. The unit is rated at delivering an 8V signal to your amp, and it's obvious compared to the much lower 2V-4V signals that many graphic EQ's put out. I was most impressed with its "punch" or aggressiveness as a result of such a strong preamp signal to the amp. (Of course, it helps to have a quality amp.) The number of tonal possibilities is limitless seeing that you can turn the rotary knobs to focus on a particular frequency and proceed to cut or boost +/- 18dB, which is a much greater range than your typical graphic EQ which usually allows up to +/- 12dB. Also, I find that with 4 knobs plus 1 for a sub, there's MUCH LESS confusion on the way to adjusting for tone compared to a graphic EQ. Good build quality for an automotive environment, perhaps leaning to the delicate side. I would suggest handling and thinking of this unit as an "instrument". I do wish the knobs were shaped to be more finger friendly and perhaps the blue LED lighting is a bit bright. (Would be good to have a built in dimmer.) I will probably open the unit and dampen the unit's bright lighting. In closing, when I got this EQ connected it was obvious to me from the beginning that I was getting a much stronger signal to my amps than any graphic EQ or headunit could deliver. This is what I've been wanting without realizing it until I made the purchase. Sometimes, as we go about building our sound systems, we can often detect the missing elements. This unit filled the gap and provided that "thing'' I knew was missing but didn't know what it was until I started using it. Good-bye, and good luck with your sound quest.

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Mrhemi

Ca

Overall
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Value
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SPL SPQ20

August 13, 2013

Decent unit for sound and quality. I ended up replacing this unit with a 7 band and was able to better shape the sound I was after.

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gerald

richland,ms

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Value
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spl spq20 very nice

August 3, 2012

I recommend this product easy to hook up and are very easy to use. Blue lights are great. Very accurate.

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tim

huntersville, NC

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Durability
Value
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Usability

awesom sound

July 30, 2012

small knobs but the sound from this is awesome, super clean no noise, works great!!!

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HEREMOANA

France, Metropolitan

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Durability
Value
Features
Design
Usability

Good product

May 29, 2012

Very nice items, frequency adjuste and gain ;) good good good

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unseenme

Alabama

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Value
Features
Design
Usability

Outstanding EQ!

April 5, 2012

My system consists of a JVC KD-A925BT, this EQ, an MTX TC4004 amp, Sony 6-3/4" Xplod components & a Sony 12" Xplod sub I listen to rock music...Korn, Linkin Park, Tool, Chevelle, Slipknot, etc. This EQ is unbelievable, especially at this price. The sound is crystal clear. The crossover & equalizer features are top notch. It has all the standard features of most modern day passive EQ's...input gains, 8v output, sub crossover/frequency select, front/rear/sub outs. The selectable frequencies on the 4-band EQs fit nicely with my deck as it has a 5 band EQ so technically I have 9 bands of equalization which really helps create a great sound. I have zero distortion at max volume & no engine noise (which is achievable if you know what you're doing). The bass is punchy & the mids/highs are clean & strong. Be careful with the input gains. My deck has 5V outputs & setting the deck volume at 75% to use the volume control on the SPL will push the volume up at low levels. My one complaint would be the mounting brackets. They didn't fit into my vehicle's double DIN mounting space below my deck so I had to manufacture a mounting system which was no problem for me since I've been doing custom installs for the better part of 25 years. Overall I give this machine a definite 5-star rating. It's totally worth the $35.

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NX2K

Tulare County, CA

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Value
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You dont need any more than this

February 22, 2012

Looks very durable, solid aluminum face, easy to use controls and the output is insane! I had to turn the gain all the way down on my amp for my front and rear speakers. The best feature is the ability to adjust the sound band's volume on top of adjusting the frequency of each band. you dont exactly need 7 bands unless youre a perfectionist. This unit actually bolted right in where my car's cup holder went, the size and the mounts were exactly the same so the install looks factory stock. The blue lighting matches my Sony DSX-S100 perfectly.

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luis

Lamont, CA

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It was GREAT!!

October 21, 2011

It sounds really good and I don't have any problems with it. I was looking towards buying a bass expander but I realized I don't need it anymore. I would recommend this product sounds nice and makes my speakers sound clearer too. Really worth the price in my city they would sell me one of these maybe for like $100 dollars and a cheaper brand.

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poochie

jackson ms

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Value
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how great it sounds

September 29, 2011

When I installed this item right off the bat my system sounded diffrent highs were clearer bass got deeper I Love this product would buy it again again and again keep up the work.

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Product Summary

Manufacturer

Model Number

SPQ20

UPC

709483021426

Weight

3.00lbs

Internal SKU

spq20

Internal Product ID

23167

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: SPL SPQ20