No worries - just wondering if it will be included in round 2. Looks promising and I have heard a lot of good reviews about this driver.
It is through the generosity of other members on this forum that makes this driver conparison possible.
I haven't listened to any of the test music. I'm just enjoying the charts and conversation. Experiencing many drivers offers insight into what manufacturers are doing and how they differentiate their products.
We don't like phase plugs the voting showed, so TangBand and Visaton might get little votes🙂 Fortunately they do seem to have only 4 mountingholes for screws, we don't like sound of six screws to baffle.
A lot of the comments after the reveal indicated quite a bit of support for the PS95-8 which was the only one with a phase plug.
🙄
Not liking the sound of a certain number of screw holes? Please pull the other one.
As to the sound of phase plugs, if correctly designed they tend to make a driver more linear. This isn't usually because of the effect they have on the drivers upper end response, but the addition of the plug adds to the heatsinking of the voice coil and can also help to linearise the inductance of the driver by acting a bit like a shorting ring.
From my point of view though trying to draw any conclusions as to what we prefer (in terms of driver design) from this test is completely folly. We're talking about unequalised drivers here. Sometimes something improves the drivers overall non linear performance but it requires some EQ to bring the linear distortion back into line.
You often see cheaper drivers exhibiting smoothing breakup regions and intrinsic roll offs than their more expensive counterparts. This sometimes confuses people (why does the cheap driver have a flatter frequency response?) but one common reason for this is that the more expensive drivers have inductance reducing shorting rings, or similar, installed and the decrease in inductance actually improves the drivers high frequency extension. This can lead to a rising and peaky high frequency response when compared to a driver without shorting rings, but isn't really of any consequence because it's easy to filter out.
Drivers with phase plugs can also typically show lower distortion in the bass than those without simply because including the phase plug removes the requirement for a pole vent. Any time you add vents and the like you're creating resonant chambers and areas around which air can chuff. Pole vent design isn't just as simple as drilling a random hole in in the pole, that is if you don't want it to have any untoward consequences. This can show up as a plethora of resonances at a multitude of frequencies that can otherwise mar a drivers performance.
3 have phaseplug, one of those has 4 screwholes, that one had most positive remarks, could be colour too (it was brighter), all phaseplugs had little votes so probably just mounted for looks 🙂
Had "E" RS100P-4 as second one preferred as seen here in the txt file http://www.diyaudio.com/forums/full...3in-5in-full-range-drivers-7.html#post4243918, had "B" not been there my vote had been on "E", and if some has it as me the pattern in the poll could quickly change then.
If in reality i should live with "E" i probably add some EQ to bring its top end more or less in sync with "B".
xrk971 could you rerecord "E" with only 4 mounting screws. . . . .🙂
If in reality i should live with "E" i probably add some EQ to bring its top end more or less in sync with "B".
xrk971 could you rerecord "E" with only 4 mounting screws. . . . .🙂
Last edited:
My mistake - I forgot the RS100's had a black anodized aluminum phase plug. I have to admit that 6 screw holes on the RS100's were a pain to work with and not needed for a little driver. Interestingly, all 4 hole drivers except the larger CHN70 fit the same screw holes. That is, they are all drop in replacements with minor screw hole differences in softer material for mounting.
Even the 10F has same screw holes as TC9, TG9, PS95, 3FE22.
Even the 10F has same screw holes as TC9, TG9, PS95, 3FE22.
You had vent resonances with the TG9FD, have you seen similar problems with the TC9FD? I think the pole vent is probably of order 2cm long, so the half wave resonance is about 8.5kHz?
Some deep freeze their cables and electronics to get rid of stress. I didn't believe this could help, but seeing we blindly heard XRK's pain with the "six screw speakers" and with the only other one which screwholes didn't match others... we are on to something here, replicate it and we have definitive proof 😀
Pragmatically speaking, despite being a pain 6 holes are better for even fixing pressure and reducing the risk of warping the frame 😉
I prefer a phaseplug to a pole.piece vent, but the cost is Sd and some bass response perhaps?
Either way, I still love that PS95-8 ( but hate the appearance of the phase plug)
Personally id like to hear how a tang band W3-1285 stacks up against the other drivers X is planning (yes it has a phase plug, but low xmax, but this is a FAST design???)
I prefer a phaseplug to a pole.piece vent, but the cost is Sd and some bass response perhaps?
Either way, I still love that PS95-8 ( but hate the appearance of the phase plug)
Personally id like to hear how a tang band W3-1285 stacks up against the other drivers X is planning (yes it has a phase plug, but low xmax, but this is a FAST design???)
If you provide the driver, I will test it. I have been getting drivers from members around the world now: Europe, Asia, and N America.
At what SPL you usually measure THD? Driver's 2.83V nominal? Also at what internal dip switch gain is your USB mic set at? Overload margin, HF cal, mic stand proximity, can affect.
Hey
i would appreciate including the Seas Prestige FU10RB H1600-04 which i finde very intriguing. Can't sponsor or send it, sorry.
Regards
i would appreciate including the Seas Prestige FU10RB H1600-04 which i finde very intriguing. Can't sponsor or send it, sorry.
Regards
I've studied this driver building LXmini clone. Lot's of dipole data, and for variations of Linkwitz's mounting.
Well it isn't just the pole vent, its the vent in combination with the air space beneath the dustcap created by the voice coil former, the apex of the cone and the top of the pole piece.
I have not used the TC9FD as I haven't had a use for it yet and I've got enough loudspeakers sitting on shelves!
The issues I had with the TG9, were readily apparent, if I remember correctly, at 2.83v. If Zaph was still standardising his SPL levels for his blog measurements then his measurements of the TC9 should have been done at an even higher drive level, yet it shows no sign of what I measured.
All I can suggest is for you to hook up the TG9, free air, to a signal generator producing 500Hz @ 2.83v and see how it sounds. When I did that there was gross distortion being produced that was very audible, then try it with the TC9 and see if it's still there. It's possible that vifa fixed that issue for the TC9.
Maybe unimportant don't know, but note 5th element seems use TG9 4 ohm version seen here http://www.diyaudio.com/forums/mult...fd-10-04-infinity-waveguide-tweeter-mini.html, xrk971 have a pair the more rare 8 ohm version from here https://www.madisoundspeakerstore.c...s-tg9fd10-08-3.5-fiberglass-full-range-8-ohm/.
Last edited:
- Status
- Not open for further replies.