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Dual 31-Band Graphic Equalizer with Sub Out
Get extra fine control over the shape your audio signal using this Dual 31-Band Graphic Equalizer with Subwoofer Output from Monoprice!
This professional equalizer is the perfect addition to a recording studio, live performance, DJ station, or even a home theater setup! It features three input options: balanced XLR, balanced 1/4" TRS, and unbalanced RCA. It also features a balanced XLR subwoofer output with a variable crossover from 50 ~ 250 Hz and -∞ ~ +10dB gain, so you can truly hear frequencies down to 20 Hz.
The EQ boasts an incredibly clean signal, with a frequency response of 20 Hz ~ 50 kHz, a THD of less than 0.01%, and a massive 110dB signal-to-noise ratio! A switch on the back panel allows you to select whether the signal ground is tied to the AC input/chassis ground or not. This is particularly useful for eliminating hum when using unbalanced RCA connections, such as for use in a home theater setup.
Each channel has independent controls and LED indicators, allowing the EQ to serve as either two mono equalizers or as a single stereo equalizer. Red and green LEDs on the front panel indicate the clipping status for the input and output for each channel, so you can fine tune your audio signal for peak performance.
The amount of signal variation for each channel is independently switchable between ±6dB and ±15dB. Each channel features a 40 Hz High Pass and a 16 kHz Low Pass filters, an EQ on/off switch, and input level controls (-∞ ~ +6dB).
It can be mounted in a standard 19-inch equipment rack or can be used as a stand-alone audio component. The following table shows the frequency points for each of the 31 sliders:
|20 Hz||125 Hz||800 Hz||5 kHz|
|25 Hz||160 Hz||1 kHz||6.3 kHz|
|31.5 Hz||200 Hz||1.25 kHz||8 kHz|
|40 Hz||250 Hz||1.6 kHz||10 kHz|
|50 Hz||315 Hz||2 kHz||12.5 kHz|
|63 Hz||400 Hz||2.5 kHz||16 kHz|
|80 Hz||500 Hz||3.15 kHz||20 kHz|
|100 Hz||630 Hz||4 kHz|
- Easy to operate front panel controls
- Constant Q circuitry with a 3% center frequency accuracy
- Control range selectable: ±6dB or ±15dB
- Active balanced and unbalanced input and output connectors
- Variable input level control
- Input and output signal clipping indicators
- Ground "Lift" switch to disconnect signal ground from the chassis ground
- Dual voltage support, accepts 100~240 VAC, 50/60 Hz input
- Robust and compact design
- Manufactured under QS9000, VDA6.1 certified management system
- Includes dedicated balanced XLR subwoofer output
- Variable subwoofer crossover and gain controls
|Type||2x 31-band, 1/3 octave|
|Slider Travel||20mm with positive center detent|
|Range||±6dB or ±15dB selectable|
Active balanced XLR and 1/4" TRS
|Maximum Input Level||14dBu|
Active balanced XLR and 1/4" TRS
Active balanced XLR
Frequency: 50 ~ 250 Hz
|Output Impedance||< 600Ω|
|High Pass Filter||40 Hz (12dB/octave)|
|Low Pass Filter||16 kHz (12dB/octave)|
|Frequency Response||20 Hz ~ 50 kHz (-1.5dBu)|
|Total Harmonic Distortion||< 0.01% (@ 1kHz, all VR at 0dB)|
|Signal-to-Noise Ratio||> 110dB|
95 ~ 120 VAC, 60 Hz
220 ~ 240 VAC, 50/60 Hz
|Power Consumption||18 watts (maximum)|
|Dimensions||19.0" x 8.7" x 3.5" (483 x 220 x 88 mm)|
- User's Manual (Mar 31, 2014)
Questions and Answers
Input and Output options are great. Rackmounting is great. Band peak frequencies are standard, and well chosen. Q values are good, overlap is fairly decent. Gain select (6db vs 13db) is useful. Input and output options are flexible. +/-6db preamp gain, that cuts to -infinity is adequate. Signal path is preserved when the unit is powered off (this is great). Unit consumes around 15w during operation and doesn't warm much to the touch. Half rack size is great for cable routing.
There's a very decent power-on and off pop, so be careful if gains aren't set well. As mentioned, the subwoofer gain selector frequency is too high. The highpass and lowpass filters for the main stereo EQ are very weak (little filtering, range too narrow). LEDs are too bright (easily fixed).
All facts considered, the EQ sounds great for the ~110$ price point. Injects no noise into the stream over XLR or TRS, flexible grounding and input/output options are helpful, good control (knob/slider) feel, good frequency points, good frequency overlap and slider Q width.
I havn't found a similar sounding EQ for the same price. Behringer EQ models and ebay EQ models in the same price range don't compare, although they may have more features.
PS: being able to drive dual 12" woofers tuned to 23hz, with +6db on the 20hz band is nearly life-changing.
PROS: Floating Ground Option, and secondary ground point.
XLR, TRS and Unbalanced RCA In and out.
Separate Sub Channel out, that takes bridged input, no Y cables needed.
20hz control for the low end is wonderful as a subsonic filter OR a bass booster depending on application.
Decent subwoofer separation with variable lowpass.
Low Power Consumption
Nice controls, smooth actuation, nice knobs.
CONS: Subwoofer frequency gain selector range is 50hz-250hz, is terrible. Most subs play below 50hz, should be able to Select gain to 30-ish hz.
DECENT power-on and off pop noise injected to input. BE CAREFUL.
LEDs are very bright.
Highpass and Lowpass filter buttons on main channels are extremely weak. Very little filtering.
However, BE VERY CAREFUL about how you connect this unit! It has a signal ground connection that is tied to the house ground!
If your receiver has only a 2 prong power cord, then you MUST use the ground lift switch on the back to remove that ground connection. It fried my center channel output on my Denon receiver within a few hours of operation. Also, it's a good idea to use an signal isolation transformer from the reciever to this unit as a further precaution. Get an isolator that can output a balanced signal to the equalizer, then to the amp if it has a balanced input, or use the RCA if unbalanced. This will also eliminate any ground loop noise that my be coming through.
Now, this could be the fault of the Denon as it should be able to handle this kind of connection, but in my experience of over 40 years of sound installs, house grounds connected with units that do not have house grounds can cause all kinds of weird problems.
FYI, I am not using the internal equalizer of the receiver for 2 main reasons: one, I have to disable the Audyssey 32 filters to use the internal EQ, and two, the internal EQ has very few bands to work with. The MONOPRICE unit has plenty of bands up in the vocal range to really precisely adjust the sound.
So, in summary, always use an isolator/ground loop eliminator for external amps (this should be done anyway in all cases) if the
source and or sink does not have any house ground connections, and use the ground lift switch on this unit as well.
Other than that, if you need this kind EQ in your system, for the price, you can't beat this unit.
8 months ago
PROS: Balanced and RCA ins/outs for channels and sub
Passive relays that keep the signal path alive even when the power is off
Smooth action on the sliders, with a small slider parking notch at the 0db middle line
Soft start on power ononly a barely audible tick is heard through the outputs
CONS: None so far
Despite the above minor flaws, the unit really has a quality sound to it and the sliders and adjustment are exceptional for a unit at this price point (I think it's exceptional at just about any price point actually). I'm using it with Marantz power amps and a turntable for a variety of musical types tailored just the way I like them. Better (sonically and from an adjustability perspective) than other EQs at twice the price.
8 months ago
PROS: Pros: It does what it is supposed to do! So far, it is working flawlessly. It fits nicely into the system, especially if you are rack mounting. The price is amazing!
CONS: Cons: I haven't found any as of yet. Thanks MONOPRICE!
1 year ago
1 month ago
PROS: Just about everything is very good to excellent.
CONS: None really....only way it could be better is if it were FREE!!
The ability to tune frequency's is a real plus to having a proper performing system in both a home setting and a Pro audio setup. It will bring your systems alive.
CONS: To properly setup a 31 band EQ requires another piece of equipment, a Real Time Analyzer (RTA). This reads thru a calibrated microphone the level of each slider on the EQ. This is the only way to actually adjust a 31 band EQ. Hey Monoprice, how about producing an affordable RTA. :)