I think I have found a good candidate for a woofer-mid to "Run Wild" in a ported 2-way.
It was a long search, and wow, some modern drivers have out-of-intended-bandwidth humps that make the one on the Eton 5-312 look like an anthill. Here's the Kartesian 6.5-inch.
And here's Purifi's new 5.25-inch woofer-mid:
The Purifi appears very well-behaved at the top of its range. The scale is different, but still...
So, I will investigate further.
One of my "Golden Ears" friends, who is both an LP collector and a loudspeaker collector, came over and he was very very happy with the sound of the Eton 5-312 Running Wild.
ciao,
john
It was a long search, and wow, some modern drivers have out-of-intended-bandwidth humps that make the one on the Eton 5-312 look like an anthill. Here's the Kartesian 6.5-inch.
And here's Purifi's new 5.25-inch woofer-mid:
The Purifi appears very well-behaved at the top of its range. The scale is different, but still...
So, I will investigate further.
One of my "Golden Ears" friends, who is both an LP collector and a loudspeaker collector, came over and he was very very happy with the sound of the Eton 5-312 Running Wild.
ciao,
john
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Those are "Pomeranian" woofers. Smaller, and higher in pitch... Whereas 4.5inch woofers are "Chihuahua" woofers.
I understand that larger cones move larger air mass with less displacement of the voice coil, viceversa for smaller units. Its only a question of geometry, math and common sense. But would I feel offended if someone try to sell me a 15cm woofer. Puajjjj.... Its as good pair of shoes compared to plastic flip flops.
I generally try to use the term woofer-mid, and I think that people know what I am talking about. Leaving aside the fact that many people simply don't want to pay for bass that is -2dB down at 27.5Hz, the 8-Ohm version of the Purifi 5.25-inch woofer-mid has an Fs of 32Hz, while the 4-Ohm version has an Fs of 29Hz.
When I started mucking around with loudspeakers in 1970 (does anyone else remember the JBL LE8T?), such performance would have been hard to imagine.
Now, Purifi does not seem to publish enclosure recommendations. But, just guessing, my guess is that putting that 5.25 driver in a 14L ported enclosure would give a -3dB point of perhaps 47Hz, while a 23L ported enclosure would give a -3dB point of perhaps 38Hz.
Seeing as the lowest string of an electric bass guitar is E = 41Hz, that's bass enough for most casual listeners.
ciao,
john
Beyma makes some good candidates, in fact I need a set of 10’s for another set of Burhoe blues that are wooferless and was looking at the 10BR60v2
Theres a 6.5“ also https://www.usspeaker.com/beyma 6B30P-1.htm
Theres a 6.5“ also https://www.usspeaker.com/beyma 6B30P-1.htm
I am going to stay with the Fountek NeoCD3.0 ribbon tweeter. A slightly modified version of that is the ribbon tweeter in Falcon Acoustics' US$27,000 "Statement" loudspeaker with Graphene woofers. And, I like the (theoretical, at least) heritage back to the Decca ribbons.
amb,
john
How it will be used, what will it's DI be.. as this will become necessary if you run a woofer up high....
that could be very smoothed graph.
The silver flute drivers didn't look so good compared to the graphs they show on the advertising sheets...............
The silver flute drivers didn't look so good compared to the graphs they show on the advertising sheets...............
Re:'a woofer of less than10 inch is a joke' - my 10" woofer was overkill for my current listening room, wheras 2x6" hit the spot perfectly; it's all about the room...
Re: the OP's quest, poly cone woofers are probably a good place to start for smooth roll off & rich mid-bass
Re: the OP's quest, poly cone woofers are probably a good place to start for smooth roll off & rich mid-bass
Quite insensitive.
14 litres is WAY too big (for a reflex anyway). I figure 3 litres. The sensitivity is traded off against about 40 Hz F10.
Tricky to fit that big a driver in that small a box… and the vent will be significant.
Sealed 2 litre would cross to a woofer at 70 Hz if you used the high pass of the box for 2 orders of your XO.
dave
14 litres is WAY too big (for a reflex anyway). I figure 3 litres. The sensitivity is traded off against about 40 Hz F10.
Tricky to fit that big a driver in that small a box… and the vent will be significant.
Sealed 2 litre would cross to a woofer at 70 Hz if you used the high pass of the box for 2 orders of your XO.
dave
@johnmarianmarks - Yes, I remember the LE8T "wideband". It was a real technical achievement IMO. I loved that driver.
The problem with the newer breed of extended range drivers is their identity conflict. They're not really that great at anything, but do a few things somewhat ok. Fostex drivers come to mind here, many of which don't qualify as being hifi enough to compete with most average budget 2 way speakers. Of course there are a few exceptions, but not that many.
The really good wide range drivers are extremely lacking in the LF department, which for me is the better tradeoff compared to others which have barely acceptable low end response and a bunch of sharp peaks in the mids that can't be practically dealt with.
The Peerless TC9 is an incredible driver, especially given the cost. Scanspeak 10F is another one that surprises.
The problem with the newer breed of extended range drivers is their identity conflict. They're not really that great at anything, but do a few things somewhat ok. Fostex drivers come to mind here, many of which don't qualify as being hifi enough to compete with most average budget 2 way speakers. Of course there are a few exceptions, but not that many.
The really good wide range drivers are extremely lacking in the LF department, which for me is the better tradeoff compared to others which have barely acceptable low end response and a bunch of sharp peaks in the mids that can't be practically dealt with.
The Peerless TC9 is an incredible driver, especially given the cost. Scanspeak 10F is another one that surprises.
Yes the LE8T’s were quite something. I lent my pair years ago to someone who is no longer my buddy. Guess why.
Looked into reconing them with genuine parts and noticed they cost more than I made in a week back then. Donated them to someone who never even thanked me. Sorry for the OT.
Looked into reconing them with genuine parts and noticed they cost more than I made in a week back then. Donated them to someone who never even thanked me. Sorry for the OT.
In the pro audio world, there are some drivers that can run open up top like the Eminence Beta 8a and B&C 8PE21. The exception with these is needing some BSC type EQ to compensate for the huge motor that brings a rising reponse with it. This holds true for many boutique fullrange drivers as well.
The Peerless NE149W can run wide open. It sounds very refined and dynamic with decent LF weight for its size.
The Peerless NE149W can run wide open. It sounds very refined and dynamic with decent LF weight for its size.
