New Peerless 15" STW-350F with 90mm mechanical excursion - Page 20 - AVS Forum | Home Theater Discussions And Reviews
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post #571 of 598 Old 04-18-2019, 09:29 AM
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Originally Posted by corradizo View Post
It certainly looked beefy.
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Originally Posted by BP1Fanatic View Post
Yeah it does!
Unfortunately for them we listen to our subs not (just?) ogle the drivers.
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post #572 of 598 Old 04-18-2019, 02:39 PM
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Word!
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post #573 of 598 Old 05-08-2019, 09:50 AM
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Well, real shocker here.

Ricci measured the driver and even free air couldn't provide enough voltage to reach claimed 45mm excursion.

https://data-bass.com/#/drivers/5cc9...3086?_k=ri7vt6

Quote:
Realistically this is a 18 or 20mm Xmax driver with a cushion beyond that point and a bottomless design. The 10.4mm mathematical Xmax is under spec'd for sure, but any hopes of it being a 90mm peak to peak driver are unrealistic.

Last edited by notnyt; 05-08-2019 at 11:26 AM.
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post #574 of 598 Old 05-08-2019, 12:33 PM
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Quote:
Originally Posted by notnyt View Post
Well, real shocker here.

Ricci measured the driver and even free air couldn't provide enough voltage to reach claimed 45mm excursion.

https://data-bass.com/#/drivers/5cc9...3086?_k=ri7vt6
If Josh couldn't feed it enough voltage to reach 45mm in free air, then it's plain and simple not possible for that driver.

I still expect the sealed testing with that driver to be interesting either way.
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post #575 of 598 Old 05-08-2019, 12:40 PM
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@Ricci

"Functionally this driver seems to be useful or relatively clean until somewhere around 20mm one way. The driver will keep producing more excursion beyond that point if more power is dumped into it, but it audibly degrades quickly from there."


Is this free-air or in a box?

Noah
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post #576 of 598 Old 05-08-2019, 12:58 PM
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Originally Posted by noah katz View Post
@Ricci

"Functionally this driver seems to be useful or relatively clean until somewhere around 20mm one way. The driver will keep producing more excursion beyond that point if more power is dumped into it, but it audibly degrades quickly from there."


Is this free-air or in a box?

It was free air on the test stand.

I use a single channel of an old crest 8002 for this not the big amps. The rated voltage is 92v rms on a single channel or 2000w into 2ohms, 1400 into 4, 800 into 8 so I can only push the drivers so far with that. With that said perhaps the bridged K20 could Tesla coil it to 90mm peak to peak momentarily but Im doubtful. Maybe...Coils were in parallel.
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post #577 of 598 Old 05-08-2019, 08:32 PM
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Welp, put that one to sleep...
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post #578 of 598 Old 05-09-2019, 03:34 AM
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Well, good to know. Thanks for posting!
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post #579 of 598 Old 05-09-2019, 06:11 AM
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Welp, put that one to sleep...
Ehhh I don't know. We'll see how it does in the GP testing.
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post #580 of 598 Old 05-09-2019, 08:02 AM
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Quote:
Originally Posted by Ricci View Post
It was free air on the test stand.

Did it do significantly worse than other drivers tested free-air at the same excursion?

I was under the impression that drivers that remain quiet over 20mm were rare.

I know that my Maelstrom 18's get noisy around then, but inaudible in use (sealed box).

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post #581 of 598 Old 05-09-2019, 10:12 AM
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Quote:
Originally Posted by noah katz View Post
Did it do significantly worse than other drivers tested free-air at the same excursion?

I was under the impression that drivers that remain quiet over 20mm were rare.

I know that my Maelstrom 18's get noisy around then, but inaudible in use (sealed box).
Depends on the driver, but yes most of them make a LOT of air noise from the motors once significant excursion is produced. Then you have your mechanical operational noises and then you have the sound. Also the remarks I made are an experienced estimate / comparison after 100 something drivers but not a strict measurement. When I mention that this or other drivers start sounding distorted I don't mean air-noise from the motor, I mean there is a change that occurs in the sound emanating from the cone and / or mechanical noises. Again this is commentary based on subjective opinion so take that for what it's worth. The GP testing will fill in a lot more of the picture.
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post #582 of 598 Old 05-11-2019, 10:10 AM
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Quote:
Originally Posted by Ricci View Post
Depends on the driver, but yes most of them make a LOT of air noise from the motors once significant excursion is produced. Then you have your mechanical operational noises and then you have the sound. Also the remarks I made are an experienced estimate / comparison after 100 something drivers but not a strict measurement. When I mention that this or other drivers start sounding distorted I don't mean air-noise from the motor, I mean there is a change that occurs in the sound emanating from the cone and / or mechanical noises. Again this is commentary based on subjective opinion so take that for what it's worth. The GP testing will fill in a lot more of the picture.
You fully recovered from the Derby shenanigans?

Looking forward to see the GP test results!
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post #583 of 598 Old 10-21-2019, 06:19 PM
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Originally Posted by Ricci View Post
Ehhh I don't know. We'll see how it does in the GP testing.
Any results yet?
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post #584 of 598 Old 10-21-2019, 06:25 PM
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Originally Posted by SpinMonster View Post
Any results yet?
https://data-bass.com/#/drivers/5cc9...3086?_k=mz36ub
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post #585 of 598 Old 10-21-2019, 07:20 PM
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Formatting on databass site could use some tweaking. Text in the left side of screen is clipped on my S8 both landscape and portrait.
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post #586 of 598 Old 10-21-2019, 07:28 PM
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Any results yet?

Nah...I've had a hell of a summer. Had to put DB on the backburner. Looks like it may be next year before I get back to GP testing.
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post #587 of 598 Old 10-21-2019, 07:32 PM
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Originally Posted by Bigus View Post
Formatting on databass site could use some tweaking. Text in the left side of screen is clipped on my S8 both landscape and portrait.


It’s a known issue since the new version rolled out.


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post #588 of 598 Old 11-16-2019, 05:08 PM
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So, after reading the full 20 pages on this thread I can't extract any clear conclusion....

I have half a mind on a DIY sub disguised as a back table close to my main couch, so a driver like that STW would be the perfect match: small box profile, get ultra low frequency... But so much haters in these thread move away my initial excitement about this driver. It's actually that bad?

I must say that subwoofer/table project would complement a pair of SB16 Ultras placed on the front wall (with the main front speakers), so I want to get some extra "Slam and Oomph" on the very low bass on films (SB16 Ultras more oriented with stereo music only).

So don't you recommend that Tymphany STW-350? Would be better a simple Dayton UM18? Box size should be about 7ft3 and I'd like keep the SB16 low distortion/clean bass.

Any thoughts?
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post #589 of 598 Old 11-16-2019, 05:10 PM
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I'd rather a dayton UM18 in a sealed box with DSP. If you have 7ft3 available you have lots of options.
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post #590 of 598 Old 11-16-2019, 05:15 PM
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Maybe SVS is low distortion for their price range but I just don't see them as an over all low distortion device. The UM18 will beat your SB16's in distortion.

The STW-350 won't give you improvements over the SB's either. They are roughly similar drivers with limited travel. What was found out in this thread is that they are intended to be used in ultra tiny boxes and have tons of power pumped into them.

If the UM18 is on your short list of comparable drivers I'd get that over this, 7cu/f box is big you could even make it smaller to 4cu/f for the UM18 if you wanted.
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post #591 of 598 Old 11-16-2019, 07:53 PM
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I mean, 7 cuft is big enough I'd start to think about two UM18's dual opposed with some healthy DSP.
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post #592 of 598 Old 11-16-2019, 08:25 PM
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Quote:
Originally Posted by OsoSolitario View Post
So, after reading the full 20 pages on this thread I can't extract any clear conclusion....

I have half a mind on a DIY sub disguised as a back table close to my main couch, so a driver like that STW would be the perfect match: small box profile, get ultra low frequency... But so much haters in these thread move away my initial excitement about this driver. It's actually that bad?

I must say that subwoofer/table project would complement a pair of SB16 Ultras placed on the front wall (with the main front speakers), so I want to get some extra "Slam and Oomph" on the very low bass on films (SB16 Ultras more oriented with stereo music only).

So don't you recommend that Tymphany STW-350? Would be better a simple Dayton UM18? Box size should be about 7ft3 and I'd like keep the SB16 low distortion/clean bass.

Any thoughts?
One of these 15's was sent along with a stereo integrity HST15 mkIII for Klippel testing. Hands down the HST is a better driver with spot on testing results that match its claims. The Peerless driver had linearity issues.
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post #593 of 598 Old 12-05-2019, 09:32 PM
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So has anyone actually thrown one of these in a properly sized box and slapped 3500 watts at it?? Or is this just some pseudo-**** measuring argument?

Mechanical x- max doesn’t mean the speaker is going to operate desirably in that area... it just means it can move that far without bottoming out. Either I am retarded or others don’t understand what that measurement means.
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post #594 of 598 Old 12-07-2019, 10:28 AM
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Mechanical x- max doesn’t mean the speaker is going to operate desirably in that area... it just means it can move that far without bottoming out. Either I am retarded or others don’t understand what that measurement means.
Actually, that's exactly what Xmax means- the limit of (usefully) linear travel.
Xmech is the point where something bottoms out- either hits the backplate or the suspension can't stretch further.

https://en.wikipedia.org/wiki/Thiele...nal_parameters

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post #595 of 598 Old 12-13-2019, 02:20 PM
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This was a very fun 20 page read lol. Should come here more often.

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post #596 of 598 Old 12-14-2019, 08:35 AM
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Quote:
Originally Posted by notnyt View Post
Well, real shocker here.

Ricci measured the driver and even free air couldn't provide enough voltage to reach claimed 45mm excursion.

https://data-bass.com/#/drivers/5cc9...3086?_k=ri7vt6
LOL

I figured if the LMS-18 is twice as expensive and has 4 slugs + the top plates and a much bigger basket and cone, and STILL barely reaches 44mm... then this driver stood zero chance.

Even my SAB-24 with 6.5inches of motor meat and a large tire surround, STILL barely manages 52mm's; the limiting factor being the basket I'm sure, and that subwoofer is one of the biggest/beefiest 24's around...

The peerless 15 is no RE XXX-15 as far as excursion goes.

Inductance though, that's a different topic...
give me an RF-19 or LMS-18 or SAB-24 any day over those.

Or even it's smaller brother, the SAB-18. MOQ of 1 too! ~$350 unshipped
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post #597 of 598 Old 12-14-2019, 11:08 AM
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...SAB-18. MOQ of 1 too!

What's MOQ?

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post #598 of 598 Old 12-14-2019, 11:29 AM
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What's MOQ?
minimum order quantity
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