I know I am being dense but I need to understand this, I get the concept and understanding of crossovers completely, what does the slope bring/not bring? Both using the low-level input. We prefer a gentle filter slope that permits good overlap with the output from the main speaker. so I be getting set up with REW soon. Passive crossovers giving acoustic slopes higher than fourth-order are not common because of cost and complexity. And these days, with the slowly growing numbers of active wireless speakers, that is good news for those who either don’t have access to their amplifiers (because they are built into the speakers themselves) or use a particular style of amplifier (some Class D amps for example have unusual aspects of their designs that make it undesirable and even unstable to hook them up High Level to a REL) that cannot take advantage of our High Level Circuit. An extreme-slope crossover at 500 Hz has been designed for the Klipsch Jubilee. More practical solutions of transient-perfect crossovers are based on delay derived crossovers where HP(s) = e-sT - LP(s) [2] or they are constructed from lowpass and highpass filters which overlap in the crossover region in such a way that a minimum phase response is preserved [3]. There certainly is on mine. April 9, 2017 in General Forum. Will it be sharp and aggressive or smooth and gradual? But, we are told by engineers whose brains run rather farther to the left half of the brain than ours, that we must eliminate bass to the main speaker, that allowing a speaker to run full range permits bass to overdrive the speaker, that it creates Doppler distortion and other even more insidious forms of audible pollution that limits its performance. According to the manual, the crossover is always enabled for the high-level input, optional for the low level one. The graphs above are with a DAC connected directly to the low level input on the sub, thus showing the REL crossover, but that's not how I normally use it. Guess I'll have to rig up a test for that too later. Obviously, yours is a different model so this may not mean anything to you. For example, making the crossover slope steeper would require additional analog circuitry - not easy once a unit is in the field. Shucks, I was trying to figure out how the low pass of the built in crossover in the sub behaves - or if their is more than one, in particular how the one used for the high level behaves. But also know that we remain hungry, always looking for that last little bit, the next performance edge that no one else has considered that will take us that much closer to the real life experience of great music and theater sound. Your probably right - it is probably same filter. But then, there is that last bit, the tricky bits that elevate merely very good products into the realm of the truly special. My dealer has been a REL main dealer since they started and advised no filters at all and set the volume, crossover and slope on the back of the REL. The answer to why we chose the less invasive route is simple, we know that we were not invited to be a part of the speaker design team when they evolved their designs, in many similar to our journey, over decades of study and learning on the best ways to create the most natural sound. Or they seek to roll off both the high frequencies from the sub and also bass to the main speaker. How every filter we have ever developed passes through an endless series of listening assessments evolved over decades of careful designs and that only the most natural approach to this is fit to make it into your REL. The diagram pictured here shows basic schematics of each filter type along with a generic theoretical slope response. The squiggly looking device is an inductor while the dual parallel adjacent lines represent a capacitor. I wonder if 24db slopes are typical in subs, or does it vary. All subwoofers use 1 of 2 types of filters; they either choose to limit and roll off just the high frequencies, allowing the bass to emerge from the sub but permitting the speaker to run full range. I don't see why it would use a different filter, though. Poorly designed crossover (left pic); a high quality crossover (right pic) The crossover (above left pic) is from a two-way bookshelf speaker system we have previously reviewed . Official online store. Lounge: Anthem MRX 720, config 5.1.4, Emotiva XPA5 Gen 2 & BasX A 500 power amps, Sony 65XE9305, Sky Q 2Tb, Sony UBP X800, XTZ Cinema Series M6 LCR, S5 Surrounds, S2 Rear Heights, KK QFH Front Heights, Rythmik FV15HP . Whether that's a typical sub crossover, I have no idea. Thanks anyways! No, but I have a UMIK1 on the way now (being shipped all the way from Hong Kong!) It will also operate with the ES5800 in a 3-way system using any combination of high section components normally used with the Klipschorn or La Scala. This means that the audio processing can be changed much more easily, without any hardware changes. So, put on your favorite album, mix yourself a drink and kick back, you might be here awhile. I have looked in vain for this info on their site and here/Google... Hey MQA, if it is not all $voodoo$, show us the math! Ah - so your low pass filter is in your pre-amp/processor. In some cases, you’ll be able to choose from a number of crossover slopes (the steepness of the cutoff) on your amplifier or other components. Rel wants it to be used as a "sub-bass" system that takes the L&R main speaker input (preferably at speaker level) along with the LFE input. It is often used as a starting point when choosing a crossover type. This diagram is courtesy of Williamson-labs.com. Their summed response is not flat, but since it is minimum phase it can be equalized. We use the former, most choose the latter. Following in the footsteps of the Arrow™ and Longbow™, HT-Air™ delivers premium Home Theater sound removing long lengths of costly, cluttered cables. I think it is shallower, by design. If your system is using one of these, and you’re not sure how to do it yourself- it’s probably best to leave it alone. With modern DSP (digital signal processing) technology, active crossovers can be implemented entirely with digital computation. These can take an analogue signal, do A/D, then do the DSP and then D/A to the main speakers and subwoofers. Whichever way you choose to connect, the ultimate crossover filter is actually built into our Low Level board, the High Level circuit is reduced in level just before this occurs so that it can use this crossover filter. Audiophiles may prefer the much more expensive and very clever Illusonic devices. T/7i. For more information on this topic, we recommend reading our article: Filter & Crossover Types for Loudspeakers. Setting up the high level input would take me a little longer, and I really should be doing other things right now. crenca, Most of today’s systems have an EQ feature that will set up the proper crossover automatically based on the specifications of your speakers. Cutoff slopes of at least 12 dB per octave are usually chosen because of limitations in the frequency range that drivers can faithfully reproduce. Our award-winning home theater subwoofers with wireless capabilities elevate any system. The graph above clearly shows a difference. Due to a Covid-19 exposure in our warehouse we are experiencing 5 day shipping delays. We just want to help you get at the more complete, totality of that experience it. For example, a second-order low-pass combined with a third-order high-pass filter.