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New Peerless STW350 subwoofer on the horizon...
New Peerless STW350 subwoofer on the horizon...
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Old 27th June 2016, 07:25 AM   #1
wolf_teeth is offline wolf_teeth  United States
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Default New Peerless STW350 subwoofer on the horizon...

http://www.tymphany.com/wp-content/u...hure-Final.pdf

http://www.tymphany.com/peerless/tra...etail/?id=1134

What a beast!!
188mm voice coil
Bl of 20
Fs of 26 Hz
Usable Xmax of 40mm
Sensitivity of 85.5dB
Qts of 0.6
Dual shorting rings

Later,
Wolf
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Old 27th June 2016, 11:45 AM   #2
TMM is offline TMM  Australia
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Links are broken
http://www.tymphany.com/stw/

Quote:
Originally Posted by wolf_teeth View Post
What a beast!!
188mm voice coil
And as a result, a tiny spider relative to the size of the driver :/

Inset motor designs from Morel and HiVi suffer from higher non-linear distortion at excursion compared to conventional motor designs with smaller diameter voicecoils and larger and more linear spiders. I don't hold high hopes for this design for that reason... Kind of pointless having 40mm xmax when the spider is only as linear as your average 8" woofer. Tymphany make some good drivers but this one seems like another "engineered by the marketing department" design.

edit: the actual one way xmax is 10.5mm, abysmal! http://www.tymphany.com/wp-content/t...188PR01-04.pdf

Last edited by TMM; 27th June 2016 at 11:56 AM.
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Old 27th June 2016, 05:05 PM   #3
wolf_teeth is offline wolf_teeth  United States
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That is calculated Xmax, and if you look closely, it's a dual-gap setup and really is likely closer to 40mm in usable operation. There is a note below the spec sheet that states this.

As to the HD and such on the smaller spider usage, VoiceCoil tested one of the Morel TiCW large woofers, and the HD was very low.

Later,
Wolf
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Old 30th June 2016, 02:28 PM   #4
TMM is offline TMM  Australia
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Quote:
Originally Posted by wolf_teeth View Post
VoiceCoil tested one of the Morel TiCW large woofers, and the HD was very low.
Really? Comparing it to the wavecor 8.75" that they tested and the wavecor has it beat by a healthy 15-20db on the second and third harmonics in the 50-100hz range. The frequency response rolling off towards 20hz reduces excursion and makes the harmonics go down - the morel more so because it starts rolling off earlier.

The kms for the morel doesn't actually look as bad as I expected though the wavecor is just as linear over an excursion that is about 40% larger, even being a smaller driver.

Last edited by TMM; 30th June 2016 at 02:37 PM.
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Old 30th June 2016, 07:17 PM   #5
wolf_teeth is offline wolf_teeth  United States
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Fair enough, but it still isn't 'bad' by any stretch. It's still quite low HD.
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Old 1st July 2016, 01:13 PM   #6
TMM is offline TMM  Australia
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Quote:
Originally Posted by wolf_teeth View Post
Fair enough, but it still isn't 'bad' by any stretch. It's still quite low HD.
Seems pretty bad for a 10" driver to me. A 10" driver doesn't undergo much excursion to reach 94dB@1m, it should be clean. At that level i'd expect the 3rd harmonic from 80-300Hz to be 50dB below the fundamental for a budget 10" woofer and more than 60dB for a premium woofer. Yet the 3rd order harmonic is only about 35-45dB below the fundamental through the entire usable frequency range of the driver. The price of the Morel is totally ridiculous ($479), so to deliver performance which is on par with a $50 woofer is inexcusable. I will eat my hat if something like a Dayton Audio DA270-8 performs worse.

Even a 5.5" woofer they tested which needs about 4 times the excursion to reach the same SPL still equals or betters the Morel 10":
Test Bench - Dayton Audio ES140Ti-8 5.5? Midwoofer

The results from audioXpress don't shed light on what is happening at the higher orders either. If Zaph's results from a smaller MW166 having a similar motor and spider arrangement are anything to go buy, it won't be pretty:
Zaph|Audio

Last edited by TMM; 1st July 2016 at 01:21 PM.
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Old 11th July 2017, 01:16 PM   #7
gbullimore is offline gbullimore  United Kingdom
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the Peerless STW is not actually a dual gap design,
it's a single gap with single VC winding,
however it is capable of 90+mm excursion Peak-to-Peak.

calculated Xmax is pretty much incomparable between brands, it seems everybody measures it differently,

the results vary wildly for a given design.
Peerless drivers use the most pessimistic (honest) value, and also give the gap geometry to let the user interpret true usability,
other manufacturers tend to use larger numbers which may or may not have any truth to them

the only real way to get an idea of excursion capability is to look at VC winding width and gap height,
anything else is at best an estimate/assumption.

the real advantage to this driver, is that it will allow a much much smaller cabinet for a given tuning.
or.
allow a much lower tuning, with a somewhat smaller cabinet,

it also suffers very little power compression.




Quote:
Originally Posted by wolf_teeth View Post
That is calculated Xmax, and if you look closely, it's a dual-gap setup and really is likely closer to 40mm in usable operation. There is a note below the spec sheet that states this.

As to the HD and such on the smaller spider usage, VoiceCoil tested one of the Morel TiCW large woofers, and the HD was very low.

Later,
Wolf
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Old 11th July 2017, 04:00 PM   #8
badman is offline badman  United States
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It'll be very interesting to see how this does. Peerless generally doesn't make bad drivers, so I'm going to give them the benefit of the doubt until this is tested. Other very large voicecoil drivers have underperformed, but that may not be the case here.
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Old 11th July 2017, 04:09 PM   #9
CharlieLaub is offline CharlieLaub  United States
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New Peerless STW350 subwoofer on the horizon...
So here we are a year later (after the original post in this thread). I don't see any available for sale. I would expect the price to be quite high, and maybe that is why no one is jumping at the opportunity to carry it?
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Old 11th July 2017, 04:26 PM   #10
gbullimore is offline gbullimore  United Kingdom
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it has taken Tymphany quite a long time getting the driver ready for launch,
i know several distributors are very keen to get it in stock. i believe it will be in stock by the end of the year.

often narrow spiders can cause problems, but like all parts of a driver, it's the challenges which set the best manufacturers apart from the pack,
i've spent some time playing around with some beta test units and the performance is significantly better than anything i have ever tested.
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