Budget Classic 3-way Discussion Thread

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#144
I think the 3D printed waveguide may just more than the average builder wants to deal with, and that is perfectly understandable.

@mikessi - regarding sealed woofers. I know someone who had the 10" SLS and it measure quite differently than the mfg specs. He was hoping to go ported in a certain sized box and it was pretty much ruled out. HOWEVER, the Qts was so much higher that it looked like it would work really well in a sealed cabinet. I wonder if that is also true of the 12" SLS. One thing that would be convenient would be to find two woofers that would work in the same sized cabinet - but one sealed and one ported. I haven't modeled them, but maybe the 12" SLS (sealed) and the LaVoce mentioned earlier (ported). I don't think "several" designs are actually going to come out of this thread, but if two designs did, especially one sealed and one ported, then that would be quite flexible.
 
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#145
See post #108.

The Peerless is really only suitable for sealed, but another woofer might work ported in the same volume. It's easy to increase volume by increasing the depth. Here's sealed only, Gray line is smaller box.
1739663788061.png
 
#148
I would say the HD26 and the D2608 are also solid contenders for tweeter duty. Impressive performance at 100dB for the HD26 and a bargain at $32 at PE (currently out of stock). I like the price of the GRS 12PT-8, anyone who has used it that can report on how it performs?
 
#152
waxx said:
that SB Acoustics SB34NRX75-6 is good, but on the upper side of our price limits i think. That's why i started look at Faital and Peerless. But it's a great driver that can go low sealed and is usable to about 500Hz (so relative easy to crosso to a smaller mid in a small sealed cabinet). If the price is no issue, it's also what i would choose. But it's about 200€ in europe, that may be too much for a budget build.
Click to expand...
CA$280 at Solen. = US$197. I get a small discount so it's probably just workable in a <CA$1k budget.
 
#155
I discovered this in my small directivity study:

Here's the ring radiator XT25BG60 on a 8x10" baffle. Note smooth response above 7KHz.

1739672471954.png


There is a yellow bulge about 5KHz which I feel is a baffle effect (yet to verify). You should also see asymmetry, since in this cabinet the tweeter was offset 10mm from the centre line.

Here is the DX25BG60- the dome version of this tweeter, in the same cabinet, again with LR2 3KHz filter-
B)
1739671896694.png

Notice the bulge around 10KHz:​


And finally- the XT25BG60 in a waveguide, the WG148R waveguide, filter for acoustic LR2 3KHz:
1739672256669.png




If you don’t want to use a waveguide, but want some directivity control, the Ring Radiators appear to have it in the top 2 octaves (exhibit A)

I wonder if this is one of the reasons for the OSMC's smooth even treble response- it also uses (Scan-Speak) Ring Radiator R2904/7000
 
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#157
mikessi said:
Vb = 95l?

Vb = 95l -- That is too big, imo. What's the smaller box size?
Click to expand...

Here is the Peerless SLS 830669 SEALED and the LaVoce SSF122.50L VENTED both in the same 2.40cf (68L) box.
They would be fine in 2.0cf for what we are trying to achieve.

Peerless F3/F6/F10 = 46/38/30 Hz
LaVoce F3/F6/F10 = 38/33/29 Hz

Max SPL 110dB vs 117dB - which isn't' all that fair because the LaVoce can handle 4 times the power.

Tale of Two Twelves.png
 
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#159
Solen told me last month that they have a spotty relationship with Peerless/Tymphany & the items showing up at PE isn't available to them at all. I got the SLS10s from them 18 mos ago at blow out prices. I think they were just moving stock out. Now, no longer available.

Only Digikey appears to provide Canadian consumer access to the SLS12, CA$124 each, which is not bad at all. But lead time is 24 weeks.
https://www.digikey.ca/en/products/detail/peerless-by-tymphany/SLS-P830669/6557525

Importing from the US is silly these days because shipping is so exorbitant, and besides, who knows when the tariff wars will begin.

So for me, SLS12 is not a viable choice.
 
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