Review rew v5.13 and truerta
On the other side we have to be aware, that whenever the same part of spectrum is reproduced by two (ore more) sources, that are some distance apart, a kind of "comb filter effect" would be present when off-axis listening is done (fortunately, the reflection waves have 'soften' that effect).
REVIEW REW V5.13 AND TRUERTA DRIVERS
Today DSP driven networks can provide sharp (usually called "brick wall") filters using different type of filters while the price can be "acceptable" (see 'miniDSP' OpenDRC products), but using such type of filter, as drivers are separated each to other (due to its size, or horn size) the listener can get a feeling (in the smaller rooms especially) that a part of the listened music from the instruments is coming from one driver and the other part from the other driver as the reproduced frequency spectrum is divided sharply between the drivers, so a kind of overlapping would give much more smoother passage from one driver to the other. Why are crossovers done in this overlapping and summing way? Why not cut straight off? Digital dsp must be able to do it? (Low-shelf inspired by the M2 filter and the JBL/Harman target curve) I do not know if it is needed? I hear no difference, so it do no harm in that way.) HF low-pass to not make the 476mg go out-of-bounds. LF high-pass to protect the 1501fe, I do not know if it is needed? It sounds better without this filter, more "body" in the bass. 790Hz feels safer to not stress the 476mg. Initially, I used 750Hz like the original network. (My room standing-wave roof/floor reduced)ħ90Hz inspired by the M2 filter. (I want to use as much voltage out from my consumer-level source as possible) My current DBX 260 settings, that roughly gives a JBL/Harman house-curve in my listening-postion. Other owners of 4365, please post your settings if you go this route! I know goophy did active crossover as well. Settings, measurements and voltage drive of the original network will follow. But try to keep it positive, I do this for the fun of it! No noise at all.Ĭomments and tips are welcome, I am a beginner at this. The system is dead silent at idle, even when putting the ear to the horn. I think it is best to keep the crossover narrow until it is finetuned/more correct. The speakers are huge, so I can not do it outdoors.Ĥ8Db slope in the crossover sounds slightly better than 24Db at the moment. I plan to do it with close microphone, and as far away from the walls as possible. Work on delay in the crossover-region is my next planned step, and off course more work on the crossover region overall. I plan to sum more positions later on.Ģ-way at the moment. Measurements done only in one position, the listening position. I know there are a LOT to work on and improve, but my initial settings sounds surprisingly good! I use the high-gain channels to drive the LF, and the low-gain to drive the HF. 3 channels with about 12Db lower input sensitivity/gain by removing resistor r141.
REW analysis program, with DBX RTA-M generic calibration file I use this as preamp with the digital volume control in the ESS Sabre dac.
REVIEW REW V5.13 AND TRUERTA FULL
Oppo BDP-105, xlr output 4.2 vrms at full volume. JBL 4365 with temporarily bypassed internal crossover.ĭBX Driverack 260, internal output gain jumper lowered to its lowest setting. It is very fun to test different settings, and hear and measure what happens. The sound is subjectively more clear and dynamic, and much more bass the way I like it. In my ears the sound-improvement is big in my system compared to stock crossover and single-amp. I have done a very basic setup with bi-amp and active crossover on my 4365s.