I used the RS225-8 in a floor-stander ML-TL, the RS duet, and it is really good. I realize you're going with a sealed box but thought this was worth mentioning as this driver is really hard to beat in performance at this price.
Paul
Paul
I like to look closely at materials when choosing drivers. Durability and biodegradability are important factors for me. Something to think about, possibly.
Consider Sica 8H2CP
https://sica.it/prodotto/8-h-2-cp/
Very good price quality ratio.
I use it in a closed box 20L, it works well.
https://sica.it/prodotto/8-h-2-cp/
Very good price quality ratio.
I use it in a closed box 20L, it works well.
I have the predecessor to this woofer in an 8" two way. It has midrange peaks that the 225-8 doesn't, but 8mm xmax.
I have them crossed over @ 2kHz with a notch filter. They deliver. Loud, deep, super clear, useable midrange is excellent. With the smoother response of the 225-8, I can't see how it isn't an excellent value at its price point. It's only easier to use. Mine are in 0.6 cu ft sealed enclosures.
https://www.diysoundgroup.com/denovo-audio-deals.html
Jim, I know that you're wanting 8ohm, but if you could make it work with 4ohm, Erich has some of the RS 225-4 for 55 dollars. Glenn
Jim, I know that you're wanting 8ohm, but if you could make it work with 4ohm, Erich has some of the RS 225-4 for 55 dollars. Glenn
RS225 is very good, but the 15-20L closed box could be a restriction.
If relaxing budget is possible, I recommend to take a look at Kartesian WOM165_vMS, or Dayton Epique 7"
I have 4 RS225-8, but I prefer WOM165 over RS225, especially in small box.
Recommend Epique since you don't need high X-over frequency.
*. Dayton RS225-8: size=8" Fs=28Hz, Qts=0.38, Vas=57L, X-max=7mm, $85/ea
*. Kartesian WOM165_vMS: size=6.5", Fs=42Hz, Qts=0.27, Vas=22L, X-max=4.8mm. $110 euro/ea
*. Dayton Epique E180HE-4: size=7", Fs=35Hz, Qts=0.46, Vas=18L, X-max=14.7mm. $125/ea
If relaxing budget is possible, I recommend to take a look at Kartesian WOM165_vMS, or Dayton Epique 7"
I have 4 RS225-8, but I prefer WOM165 over RS225, especially in small box.
Recommend Epique since you don't need high X-over frequency.
*. Dayton RS225-8: size=8" Fs=28Hz, Qts=0.38, Vas=57L, X-max=7mm, $85/ea
*. Kartesian WOM165_vMS: size=6.5", Fs=42Hz, Qts=0.27, Vas=22L, X-max=4.8mm. $110 euro/ea
*. Dayton Epique E180HE-4: size=7", Fs=35Hz, Qts=0.46, Vas=18L, X-max=14.7mm. $125/ea
Thanks for all your thoughts, this has been very helpful.
The RS225-8 was originally my first choice. It performs so well on paper (i.e. simulation) and it has a great reputation. But because of the price constraints of this project, I wanted to fully explore all possible lower-cost options.
j.
The RS225-8 was originally my first choice. It performs so well on paper (i.e. simulation) and it has a great reputation. But because of the price constraints of this project, I wanted to fully explore all possible lower-cost options.
j.
Everyone says great stuff about the RS225! Unfortunate what the post-pandemic world has done to their price. I should have bought some back when they were half they're going for now... then again it's not like I don't already have a bunch of other drivers waiting for their chance out in the garage... 😴
For futher reducing budgets, one option is peerless SDS-160F25PR01-08 6.5", Fs 42, Qts 0.49, Vas 30L, I think they are 23 usd on digikey. They actually sounds not bad despite of the appearance.
There was a sale maybe almost 2 years ago when they went for $50ea. I stocked up on an extra set. Made a speaker and gave it to a friend. DIY speakers make great gifts as you probably all know.
I have a pair of the SDS-160F25PR01 they seem to be pretty good swept vol per dollar. I've got them in I forget exactly 10 -15 liters or so, sealed. That models down to some 80 Hz or so (model suggests they could get pretty low ported), but in-room measurements (RTA) suggest I'm not quite getting there. The woofer's fault, or my room? I dunno, they take some boost to make up the difference with no complaint, and can get down far enough to hand off to my sub.
They do have something going on around 1.5 kHz. Time windowed, it shows up as a dip, but without a window the measurement goes through that region without issue. That was a ground-plane measurement, it should be relatively clear-ish of reflections. So I'm not sure what's going on there, but I've got them handing off to a TC9 below that so I haven't worried. They sound more muscular on the low end than my 830656, as expected, much more displacement.
PE used to have 'em, but I don't see them on there any more. Looks like DigiKey still has them for $22.50 each, seems like a good deal you could do up 2 on each side. https://www.digikey.com/en/products...DS-160F25PR01-08/SDS-160F25PR01-08-ND/6557514
They do have something going on around 1.5 kHz. Time windowed, it shows up as a dip, but without a window the measurement goes through that region without issue. That was a ground-plane measurement, it should be relatively clear-ish of reflections. So I'm not sure what's going on there, but I've got them handing off to a TC9 below that so I haven't worried. They sound more muscular on the low end than my 830656, as expected, much more displacement.
PE used to have 'em, but I don't see them on there any more. Looks like DigiKey still has them for $22.50 each, seems like a good deal you could do up 2 on each side. https://www.digikey.com/en/products...DS-160F25PR01-08/SDS-160F25PR01-08-ND/6557514
What do you see as the predecessor to the RS225-8? I know of none.
I know Jim wants 4 ohms, but the SD215A-88 really would be a good option. Same for DSA215-8.
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Perhaps he meant the earliest release.
It had more x-max (shorter gap or longer coil) than the subsequent mass production RS225S-8.
Or the non shielded (current model)
Pros and cons of each of these?
I haven’t used these, but they are somewhat interesting
It had more x-max (shorter gap or longer coil) than the subsequent mass production RS225S-8.
Or the non shielded (current model)
Pros and cons of each of these?
I haven’t used these, but they are somewhat interesting
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Need more info on SPL / purpose.
Visaton BG20 8" could be really nice in 2-way musical instrument cabs that an electric piano sits on top of. My one has internal 4cm x 10cm oval speakers, which are surprisingly good in their plastic case, but they could use a bit more oompth.
Visaton BG20 8" could be really nice in 2-way musical instrument cabs that an electric piano sits on top of. My one has internal 4cm x 10cm oval speakers, which are surprisingly good in their plastic case, but they could use a bit more oompth.
hifijim: what are midrange and tweeter drivers?
I have Peerless TG9 with black cones (OEM) and would like to make budget 3way with 8", so I find this thread very informative.
I have Peerless TG9 with black cones (OEM) and would like to make budget 3way with 8", so I find this thread very informative.
The 225-8 replaced a very similar woofer in the Dayton lineup. It is an improvement; the biggest improvement is the taming of pesky midrange peaks.
I would have to look it up. I've had them for about six years. For all I can remember, they have the same designation.
for DSP/Digital-X-over, there are certain options in ASR or Digital-Line.
But I found one Analogue Active-X-over pretty good, the TIPD134 from Texas Instruments. Though it's designed for 2-way. In Taiwan, one finished board (print, have someone to install the SMD things on it) is around $40 USD. If you refer its simulation software, one should be able to modify for 3-way designs. I installed it with TPA3221 board and they works great.
And I heard Sylph Audio is also planing the OP-based Active-X-over with Pre.
Upper Left = TIPD134 (the green board)
Upper Right = TPA3221
Middle = Meanwell LRS-150-24
Bottom = DC converter, 2 VR, RCA input*1