And I was after a full ranger for simplicity 
NO! lowthers tho, a dead end in my experience.
Been through the bespoke/diy Crossovers quest; $$$! later evolved into diy Actives, even more $$$$! Yes! there was improvement but it's Not huge.
Perfection (or at least the quest for) is a seriously demanding Mistress.
Not whining, I fully understand the rationale, only too well, unfortunately.
Been 'at this' albeit sporadically, since '70... that's frightening.
Thanks for the link by the way, I'll likely buy a pair.
Erm what is a uFonkenWK.
NO! lowthers tho, a dead end in my experience.Been through the bespoke/diy Crossovers quest; $$$! later evolved into diy Actives, even more $$$$! Yes! there was improvement but it's Not huge.
Perfection (or at least the quest for) is a seriously demanding Mistress.
Not whining, I fully understand the rationale, only too well, unfortunately.
Been 'at this' albeit sporadically, since '70... that's frightening.
Thanks for the link by the way, I'll likely buy a pair.
Erm what is a uFonkenWK.
A very nice box for the Fostex FF85wk. Small & rectangular.
They only differ in exact venting detail from the original uFonken
There is also the larger, trapezoidal uFonkenSET (SET = Special Edition Trapezoid)
dave
when choosing an enclosure design and construction details for this particular driver, I'd advise leaving room to accommodate a small tweeter - you might not feel the need, but then again ....
Dave, et al:
for the ERT26 mentioned earlier as a very affordable tweet for the CHP70.2, does a "simple" 1st order at say, 6-8kHz (C=3 - 4mF) make sense?
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Wee tweets ordered .. regardless of IF I will need them.
Still 'concerned' that a 3" driver will meet expectations,, sure is Teeny Tiny.
My current speakers have 15" cones... their HF units have ~3" compression diaphragms.
Leap of faith here..You guys can't All be wrong ?
Worst case, I suppose one could mount them to a Motorcycle helmet as "Ozarks" style headphones
Nothing to do now but try and see.
Still 'concerned' that a 3" driver will meet expectations,, sure is Teeny Tiny.
My current speakers have 15" cones... their HF units have ~3" compression diaphragms.
Leap of faith here..You guys can't All be wrong ?
Worst case, I suppose one could mount them to a Motorcycle helmet as "Ozarks" style headphones
Nothing to do now but try and see.
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It is a nominal 4" driver. If we called it a 3" then we'd have to call your 15" Tannoys, 12" drivers.
Here is the CHP70.2 next to a 3" FF85wK
dave
Attachments
OK.. on viewing the published diagrams with care, CHP 70 has a TWO inch actual cone.
Gets even more impressive if one pays close attentions .
Arguable if the suspension contributes much, as these are usually designed not to add garbled output.
Unlikely if this unit is unique in this.
Hey! I bought 'em. Sure seem seriously Teeny Tiny though, is All.
Gets even more impressive if one pays close attentions .
Arguable if the suspension contributes much, as these are usually designed not to add garbled output.
Unlikely if this unit is unique in this.
Hey! I bought 'em. Sure seem seriously Teeny Tiny though, is All.
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Bare - this is nominally the same size as cone in EL70 - which is by no means a TeenyTiny sounding driver - as you'd be able to experience if you took that boat ride in 3 weeks. Of course Bob at CSS is much closer than that, and he may still have a demo pair kicking around or audition.
All Ok.. Now, minor Panic Attack over
Again, Not Complaining, just observing. Also bought a pair of the erm 'cheap $12 ' Vifa 4'' teeny drivers. Glutton for punishment.
A you said Hearing is believing.. and ALL you guys can't be wrong .. I hope.
Realised that my Tannoys' crossover at 1000hz to their 3" diam HF drivers, albeit in a double (arguably triple) array of expo horns.
Which then leads me to wonder Why? None, of my as of yet, admittedly small sampling of bespoke horn enclosures for these Teeny drivers do not feature Expo horns??
The concept is decades proven effective. Doesn't it work in these or just too hard to build decently ?
Next design advance for full rangers ?
Take a peek at what a Tannoy GRF looks like.. and Why I had a panic attack at the full realisation that I had purchased Headphone drivers on steriods.
Tannoy Monitor Gold
Approx 3 years a go a friend spent large for astate of the art home theater/Audio room setup.. $125k! Large. Not pocket money.
Comprising 3 pairs! of the large Martin Logans, 2 Velodyne subs and 4 amps. Plus the mandatory entire wall video screen nonsense
Realism of the sound is nothing short of astonishing.. Dohh!
Video ? same crap that I see on my pedestrian Sony. Who cares
Makes my audio setup sound like a Philips Stereo console from the mid 60's..in comparison. Sad but true.
Surprisingly he hasn't entered that room for over a year.
Clearly, wanting is far more enticing than having.
Again, Not Complaining, just observing. Also bought a pair of the erm 'cheap $12 ' Vifa 4'' teeny drivers. Glutton for punishment.
A you said Hearing is believing.. and ALL you guys can't be wrong .. I hope.
Realised that my Tannoys' crossover at 1000hz to their 3" diam HF drivers, albeit in a double (arguably triple) array of expo horns.
Which then leads me to wonder Why? None, of my as of yet, admittedly small sampling of bespoke horn enclosures for these Teeny drivers do not feature Expo horns??
The concept is decades proven effective. Doesn't it work in these or just too hard to build decently ?
Next design advance for full rangers ?
Take a peek at what a Tannoy GRF looks like.. and Why I had a panic attack at the full realisation that I had purchased Headphone drivers on steriods
.Tannoy Monitor Gold
Approx 3 years a go a friend spent large for astate of the art home theater/Audio room setup.. $125k! Large. Not pocket money.
Comprising 3 pairs! of the large Martin Logans, 2 Velodyne subs and 4 amps. Plus the mandatory entire wall video screen nonsense
Realism of the sound is nothing short of astonishing.. Dohh!
Video ? same crap that I see on my pedestrian Sony. Who cares
Makes my audio setup sound like a Philips Stereo console from the mid 60's..in comparison. Sad but true.
Surprisingly he hasn't entered that room for over a year.
Clearly, wanting is far more enticing than having.
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Wall mounted transmissionline with Visation BG 17
Hi Bare,
Regardless of having posted the following even in the Full Range Speaker Photo Gallery this could be inspiring for you as well.
I´d like to show a cheap, quick and dirty project: a wall mounted transmissionline with the full range driver Visaton BG 17. Ok, some may say this driver is not sufficient for hifi but suits better for guitar amps. Anyway, you´ll never know if you dont´t try, won´t you?!
The aim was to develop a cheap box that matches with single ended triodes. Furthermore it had to be lightweighted and flat enough for wall mounting. The following sketch shows the sizes of the walls (all sizes in cm). The width of the side walls is 10 cm, the thickness of all walls 1.6 cm (I used simple spruce).
After some experimentation with the damping I figured out the best solution in order to prevent mids coming out of the line. I started as shown on the top of the following pic...
I am no fan of filter networks, notch filters and all that stuff so I left it out. Filters bend & disturb phase and impedance - not recommendable if you intend to use triodes. The frequency response of the Visaton BG 17 is relatively linear - linear enough for me as I did not intend to create mega high end with this project!
Visaton BG 17 with an efficiency of 93 dB @ 2.83 V.
In the end this project costs around 50-60 bucks in total.
If you are interested in further information just have a look to my blog. It´s in German but you may use the translation tool of your browser.
2A3 Maniac: Cheap, quick and dirty: Visaton BG 17 DIY-Wall-Transmissionline
2A3 Maniac: Follow-up: Visaton BG 17 DIY-Wall-Transmissionline
2A3 Maniac: DIY-Wall-Transmissionline mit Visaton BG 17 - Follow-up II: die Bedämpfung
Cheers,
Carsten
Hi Bare,
Regardless of having posted the following even in the Full Range Speaker Photo Gallery this could be inspiring for you as well.
I´d like to show a cheap, quick and dirty project: a wall mounted transmissionline with the full range driver Visaton BG 17. Ok, some may say this driver is not sufficient for hifi but suits better for guitar amps. Anyway, you´ll never know if you dont´t try, won´t you?!
The aim was to develop a cheap box that matches with single ended triodes. Furthermore it had to be lightweighted and flat enough for wall mounting. The following sketch shows the sizes of the walls (all sizes in cm). The width of the side walls is 10 cm, the thickness of all walls 1.6 cm (I used simple spruce).
After some experimentation with the damping I figured out the best solution in order to prevent mids coming out of the line. I started as shown on the top of the following pic...
I am no fan of filter networks, notch filters and all that stuff so I left it out. Filters bend & disturb phase and impedance - not recommendable if you intend to use triodes. The frequency response of the Visaton BG 17 is relatively linear - linear enough for me as I did not intend to create mega high end with this project!
Visaton BG 17 with an efficiency of 93 dB @ 2.83 V.
In the end this project costs around 50-60 bucks in total.
If you are interested in further information just have a look to my blog. It´s in German but you may use the translation tool of your browser.
2A3 Maniac: Cheap, quick and dirty: Visaton BG 17 DIY-Wall-Transmissionline
2A3 Maniac: Follow-up: Visaton BG 17 DIY-Wall-Transmissionline
2A3 Maniac: DIY-Wall-Transmissionline mit Visaton BG 17 - Follow-up II: die Bedämpfung
Cheers,
Carsten
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