Check out Rick's JeffB Tribute speakers. Pretty low system distortion for something using a 16$ mid and 25$ tweeter.
Jeff Bagby Tribute -
Techtalk Speaker Building, Audio, Video Discussion Forum
Jeff Bagby Tribute -
Techtalk Speaker Building, Audio, Video Discussion Forum
Exactly. This range (say 1.5k to 3k) seems to be hard to fill with the incredibly low distortion that the PTT6.5 (and PTT4.0) have below it and a select few tweeters, such as the Bliesmas have above it.
I have a pair of CSS SDX12s I plan to use to cover the lowest end. Perhaps not quite up to the standard of 15" JBLs (or, maybe they are?), but should be more than adequate for me.
I just can't see spending $852 on a pair of tweeters with exposed BE domes. There are other options for going down that low (ESS Heil, SS 9900, Bleisma T34, etc.). May be the way I end up going.
The ESS Heil and SS9900 are definitely more cost effective. I don't see the T34, even the Alu version to be very cost effective - and of late the shipping from Canada has been a bit iffy.
I am hoping the other satori drivers end up in that waveguide... but when that will happen....
Or the Raven line source... 😛
+1 for the ESS AMT though. And for even lower distortion or going lower you could add a 2nd one on top. Very fast, natural and detailed. And still cheaper than many of the Be vaporizers...
At cost of vertical reach and a somewhat less flat response...
+1 for the ESS AMT though. And for even lower distortion or going lower you could add a 2nd one on top. Very fast, natural and detailed. And still cheaper than many of the Be vaporizers...
At cost of vertical reach and a somewhat less flat response...
Personally, I don't see the Viawave HD3 being all that impressive.
https://hificompass.com/sites/default/files/zamer/afc315/srt-7_315mm_2v83_hpf4-2000.png
Compared to SS9900
https://hificompass.com/sites/default/files/zamer/afc315/d2905-9900_315mm_2v83hd.png
Or T25B (especially above 3k)
https://hificompass.com/sites/default/files/zamer/afc315/t25b-6_315mm_2v83_hpf2-800.png
https://hificompass.com/sites/default/files/zamer/afc315/srt-7_315mm_2v83_hpf4-2000.png
Compared to SS9900
https://hificompass.com/sites/default/files/zamer/afc315/d2905-9900_315mm_2v83hd.png
Or T25B (especially above 3k)
https://hificompass.com/sites/default/files/zamer/afc315/t25b-6_315mm_2v83_hpf2-800.png
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Pipe and slippers need not apply - Thoughts on the speakers over the last week or two;
The Bliesma T34A really is like a freakin CT Scan into the top end. I've never experienced anything that makes for such on the edge of your seat listening. Forget revelators and illumintors, this thing the Hubble Space Telescope. (Currently crossing at 1800hz to the purifi with the Harsch XO from xrk as mentioned in this thread). I can see the purifi taking over the studio monitor market with the right tweeter, ahem, this one.
I could definitely see people searching for a more relaxing listen for Hi-Fi. But for movies it is outstanding. As fronts with a highpass of 80 ish hz it should be able to handle 'THX' levels, but I'm not one of those people, yet (i.e. until I get a house with a dedicated HT room).
The Bliesma T34A really is like a freakin CT Scan into the top end. I've never experienced anything that makes for such on the edge of your seat listening. Forget revelators and illumintors, this thing the Hubble Space Telescope. (Currently crossing at 1800hz to the purifi with the Harsch XO from xrk as mentioned in this thread). I can see the purifi taking over the studio monitor market with the right tweeter, ahem, this one.
I could definitely see people searching for a more relaxing listen for Hi-Fi. But for movies it is outstanding. As fronts with a highpass of 80 ish hz it should be able to handle 'THX' levels, but I'm not one of those people, yet (i.e. until I get a house with a dedicated HT room).
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Hi Mainframe,
Have you ever had a chance to listen to a RAAL? I wonder how that would do with the PTT6.5? I have one on hand but it’s got compulsory 4th order. So no Harsch XO possible there.
That beryllium Bliesema sounds like good stuff there.
Have you ever had a chance to listen to a RAAL? I wonder how that would do with the PTT6.5? I have one on hand but it’s got compulsory 4th order. So no Harsch XO possible there.
That beryllium Bliesema sounds like good stuff there.
Are we talking about the T34A (aluminium-magnesium alloy) or the T34B (beryllium)?
I see that the new Jones-Scanlon Baby Reds (approx $4400 USD, per pair) are based om PTT6.5 together with tweeter Faital Pro FD371.
Would Harsch XO be applicable to the FD371?
RAAL is seriously very good.
We used them (AG-version) in our "Bendit" Project.
Why is 4th order for RAAL compulsory ? (4th order is a recommendation for 1600 hz). I guess you are aiming for low xo avoiding beaming from PTT?
Never had the chance to hear the RAAL or other modern high end ribbons.
Did have a pair of NeoCD 3.0 though, for a couple of hours.
With most speakers I jerry-rigged together there was always the thought: I wonder what it sounds like if I put a ribbon on top. With the T25B that urge has gone.
A while ago I was experimenting with some Ambient tweeters. The thought was to fill-in the powerresponse from the top down, to even get some reflected sound as high as 20kHz. I had the main tweeter placed on top of the cabinets with some whool around them to dampen diffraction. Behind the tweeter, I placed a Dayton ND16 facing up. I removed the little waveguide to get it to beam up to 180 degrees at 20kHz. The sound that would have gone forward towards the listener was now reflected against the back of the main tweeter. I quite liked the effect with some source material, it sounded a lot more Atmospheric. And because the reflected sound is a couple of dB down, distortion didn't seem to matter as much. My minds ear even thought the reflected highs were of higher quality than the main tweeter at the time, causing a noticable quality skew.
With the new tweeters, I think it is worth a shot again. That is, after I find a suitable mid.
First results of edge-coating an MR13 are positive. Although, I wonder how an open-back compression driver with a 4 inch diaphragm would sound, dome facing forward. I have a feeling the suspension will be too stiff for it to dig deep. But I don't have a clue which driver to pick for experiments as well as which kidney to pick for resale. I heard rumour about an SB MD60 with Berrylium diaphragm, but can't yet find an appropriate size in Materion's catalogue.
It might be nitpicking anyway, chasing the next dragon.
Did have a pair of NeoCD 3.0 though, for a couple of hours.
With most speakers I jerry-rigged together there was always the thought: I wonder what it sounds like if I put a ribbon on top. With the T25B that urge has gone.
A while ago I was experimenting with some Ambient tweeters. The thought was to fill-in the powerresponse from the top down, to even get some reflected sound as high as 20kHz. I had the main tweeter placed on top of the cabinets with some whool around them to dampen diffraction. Behind the tweeter, I placed a Dayton ND16 facing up. I removed the little waveguide to get it to beam up to 180 degrees at 20kHz. The sound that would have gone forward towards the listener was now reflected against the back of the main tweeter. I quite liked the effect with some source material, it sounded a lot more Atmospheric. And because the reflected sound is a couple of dB down, distortion didn't seem to matter as much. My minds ear even thought the reflected highs were of higher quality than the main tweeter at the time, causing a noticable quality skew.
With the new tweeters, I think it is worth a shot again. That is, after I find a suitable mid.
First results of edge-coating an MR13 are positive. Although, I wonder how an open-back compression driver with a 4 inch diaphragm would sound, dome facing forward. I have a feeling the suspension will be too stiff for it to dig deep. But I don't have a clue which driver to pick for experiments as well as which kidney to pick for resale. I heard rumour about an SB MD60 with Berrylium diaphragm, but can't yet find an appropriate size in Materion's catalogue.
It might be nitpicking anyway, chasing the next dragon.
Radian 950 would do well as a dedicated mid dome with a spacer to give you more clearance against the phase plug.
My mistake, I thought Mainframe had the Be version. The RAAL has a built in impedance matching transformer (custom hand made with silver wire) and the only permissible (according to factory specs) added crossover parts were a single coupling cap in the 1uF to 5uF range and an attenuation resistor. The external cap controls the XO frequency but the slope would be 4th order due to the built in transformer and electro acoustic response of the tweeter.
The FD371 looks really nice, it probably could be shaped to be 3rd order Bessel in a passive at 3.5khz. It has lots headroom for shaping but not sure if it can be done with so few components like the RS28F. It’s also a compression driver with a very different sound. Would make a very compact speaker though.
https://www.parts-express.com/pedocs/specs/294-1000-faitalpro-fd371-8-specification.pdf
I looked at the Baby Reds, interesting - but do you need a 500w amp for the Purifi? And a 150w amp for the FD371?
The FD371 looks really nice, it probably could be shaped to be 3rd order Bessel in a passive at 3.5khz. It has lots headroom for shaping but not sure if it can be done with so few components like the RS28F. It’s also a compression driver with a very different sound. Would make a very compact speaker though.
https://www.parts-express.com/pedocs/specs/294-1000-faitalpro-fd371-8-specification.pdf
I looked at the Baby Reds, interesting - but do you need a 500w amp for the Purifi? And a 150w amp for the FD371?
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Al tweeter yes.
Haha - deafen yourself, your cat, your dog and maybe your neighbours pets at the same time?
Thanks for the suggestion Ernie, that looks like a decent driver. I'll put it on the watchlist of the local marketplace app. For now I still need my car though 🙂
Interesting data xrk971.
You speak about high power amplifier and response shaping, what do you think about shaping the response of the top end on the Purifi? Looking at the distortion graphs, it looks like a possibility to run it full range, and make a very compact speaker.
@Paul Ebert: Thanks for the suggestion. Combining stiff materials and damping seems the way to go.
What do you guys think about these:
(XT1086 + CD: Wave guides & horns)
There are a few for sale not too far away from here.
Graph is at 90dB, a bit loud maybe. I might not need a power amplifier at all with those voltages, but impedance is an issue, so to power it straight from the DAC is out of the question, some sort of buffer is needed. Thoughts?
Interesting data xrk971.
You speak about high power amplifier and response shaping, what do you think about shaping the response of the top end on the Purifi? Looking at the distortion graphs, it looks like a possibility to run it full range, and make a very compact speaker.
@Paul Ebert: Thanks for the suggestion. Combining stiff materials and damping seems the way to go.
What do you guys think about these:
An externally hosted image should be here but it was not working when we last tested it.
(XT1086 + CD: Wave guides & horns)
There are a few for sale not too far away from here.
Graph is at 90dB, a bit loud maybe. I might not need a power amplifier at all with those voltages, but impedance is an issue, so to power it straight from the DAC is out of the question, some sort of buffer is needed. Thoughts?
I am not sure EQ’ng the PTT6.5 to get stuff above 3.5k makes sense. It’s a midwoofer. I would consider pairing it with a Scanspeak 10F. That might be very nice sounding. Cross around 1kHz.
