I’m back at the small single driver thing again after playing with electrostatic headphones for several years. I want a sub-sat system with one or two REL T/Zero MkIII subs or a single T/5X. I was thinking of high passing the sats with a cap at 100Hz. is that enough protection for them? The REL‘s crossover maxes out at 120Hz. Any acoustical reason to go to 4th order?
Thanks, as always.
Thanks, as always.
Well, unless the satellites have a flat impedance at 100Hz (very unlikely) you're unlikely to be high-passing them per se with a nominal 100Hz cap based on either the nominal impedance or the Re nominal. You're more likely to end up with something essentially similar to the old trans-cap approach of squeezing more extension out of an acoustically undersized sealed box by having the series cap interact with the rising LF impedance & thereby boosting output around those frequencies. Assuming you don't want to heave a large input LCR Zobel across the speaker (large components = expensive. I've done it, but it costs) passive filtering is problematic at these frequencies & you'd likely need to go active to actually get the sort of rolloff you're aiming to achieve.
I specifically have in mind Tozzi One, ScanSpeak 5F, and Markaudio CHN-40 (both in sealed cabinets).
Would you recommend 4th order active slopes? I believe Marchand may have an appropriate kit, although probably not cheap.
Is my concern justified in the first place?
Would you recommend 4th order active slopes? I believe Marchand may have an appropriate kit, although probably not cheap.
Is my concern justified in the first place?
Tozzi One is not a great box, have a look at the CHN-50 (what is in Tozzi) in a better box.
Given that the RELs are independent of the mains, why not figure out how to use a PLLXO, a single capacitor in series with the sat amp input… you just need to figure out how to independently get a FR signal to the subs.
Do the RELs go high enuff to meet a small sealed box? And you can’t build your own subs? Easiest boxes to do.
dave
Given that the RELs are independent of the mains, why not figure out how to use a PLLXO, a single capacitor in series with the sat amp input… you just need to figure out how to independently get a FR signal to the subs.
Do the RELs go high enuff to meet a small sealed box? And you can’t build your own subs? Easiest boxes to do.
dave
I’ve had the same concern about the REL. It probably doesn’t go high enough.
I’ve thought about building a PE 8” powered sub kit using a GRS driver & plate amp that goes up to 200Hz. (I think it’s called the Workhorse.) I live in an apartment, so my DIY days are past me, although I could glue & clamp in my kitchen. Finishing the cab would be the trick. This route would be affordable. I do love the piano black finish of the REL!
I’ve thought about building a PE 8” powered sub kit using a GRS driver & plate amp that goes up to 200Hz. (I think it’s called the Workhorse.) I live in an apartment, so my DIY days are past me, although I could glue & clamp in my kitchen. Finishing the cab would be the trick. This route would be affordable. I do love the piano black finish of the REL!