![]() I tried different boost/cut levels with a "Peak" EQ, 1kHz, Q=9. ( EDIT: Another interesting explanation here (More explanations between constant Q and vary-Q here) Some EQ will have level at the middle frequency to 0dB, which may be confusing. are welcome.Īny donations are much appreciated using : įor such a device, an important question is: what kind of graphic EQ correction does this one bring ?Ī simple frequency response test at 4 levels on the same graph would bring the answer (and measure the amount of correction): for, say, 1kHz, level at 0, 1/2 max, max, 1/2 min, min.Īnother big difference between graphical EQs is: if I push, say, 1kHz to max, then cut 1.25kHz to min and 1.6kHz to max, what is my level at 1.25kHz ? I am going to recommend dbx 1231 graphic eq if you need such a device.Īs always, questions, comments, recommendations, etc. Dual 31-band, 1/3-octave Constant Q frequency bands Switchable boost. The dbx 1231 has a lot of bands so you may be able to get close with it but still not an optimal tool. New version S of graphic equalizer 1/3 of the octave, 2x31 constant Q areas. Note that in general, graphic equalizers are poor at dealing with room modes or speaker correction. This is a quality piece with reasonable price to match it for analog lovers. My memories of consumer units was that they were hiss factories. Good to see the word "professional" has a meaning here in delivering a low distortion and noise graphic EQ. I was disappointed to see a rise in distortion at low frequencies: IMD distortion is respectable with EQ bypassed and not too bad with it active:Ĭrosstalk is excellent either way: (better than most amplifiers) I was pleased to see it handle up to 9 volts input before clipping: And with over 108dB of dynamic range, you know your sound is in good hands when you trust it to the dbx 231s graphic EQ. Repeatability is hard as well for the same reason. It is hard to get rid of the channel mismatch due to notches in the gain control with the pot itself being fully variable. Here is our signal to noise ratio which is impacted the most:įrequency response is flat in audible band with EQ bypassed: Although I haven't fixed mine I would bet a local high end store with a repair department could replace it or you might be able to do. We are right at noise floor of 16 bit audio so not bad still. If you remove the hood you can see the battery on the lower board. Turning on the EQ but keeping all the sliders at 0 shows the penalty of the full pipeline: Don't like the power supply noise but they are at -118 dB so we can ignore them. Let's start with EQ bypassed and input/output of 4 volts:ĭistortion is at -105 dB which is very good for the class. Still, feel free to read any bias in my subjective remarks. Our company, Madrona Digital, buys some of their product lines but not these. Isn't this an attractive box or what? Makes you want to sit there and just play with all those sliders! Careful though as setting them all back to zero is very time consuming. It is on kind loan from a member and costs US $499. With such affordable quality, there's no longer any excuse for compromising your sound.This is a review and detailed measurements of the dbx 1231 stereo balanced Graphic Equalizer. Sure to find a home in the studio, on tour and with installed sound venues, the 2-Series is destined to take its rightful place in the lineage of great dbx® signal processors that are the Professional's Choice™. ![]() ![]() ![]() From its amazing 10Hz to 50kHz frequency response, to its 108dB dynamic range and internal toroidal transformer, the 2-Series offers out of this world specifications with a down to earth price point. It was designed to meet the needs of the most demanding sound reinforcement environments. The 2-Series represents a major step forward in the performance of entry-level graphic equalizers. The 1215 is dual channel, 15 band 2/3 octave graphic equalizer. As always, the inevitable result of our meticulous attention to detail and top-quailty componentry is exceptional sound, performance, and reliability. Operation Connected to its calibrated condenser microphone, and supplying its own pink-noise signal to the system, the 14/10's RTA can be used to measure and display the audio system's frequency response in the listening room. Besides including two 31-band channels of 1/3-octave equalization, the 231 also offers ☖ or ☑2 dB boost/cut range XLR, 20mm faders and 1/4" inputs nonconductive nylon sliders and an intuitive user interface with comprehensive output and gain reduction metering. With a lineage extending back to the revered 12 and 20 Series graphic equalizers, the dbx® 231 easily lives up to the dbx reputation at a price point which can find a home in the tightest of budgets. With a lineage extending back to the revered 12 and 20 Series graphic equalizers, the dbx 231 easily lives up to the dbx reputation at a price point which can. Digital Adapters & Miscellaneous Cables.
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