Some speaker driver measurements... - Page 48

ScottG · 7th November 2019, 02:40 AM

Quote:

Originally Posted by nailhead

Why don't you write "at 94dB (SPL)" like any one else does? Do you want to confuse people?

Want to be special?

I don't know about that..

-but he doesn't have to "want" to be special: in this hobby/industry - he is special.

Oneminde · 7th November 2019, 02:48 AM

The SEAS 27TAC has improved the off axis response, but the 25kHz breakup is nightmare fuel. Its among the worst I've seen for a "premium" tweeter, also the moving mass of 0.36 grams is also much higher than some of its competitors.

Quote:

It supposedly is simply an improved 27TBFC. Copper cap where there was not one before, titanium (Titan line) voice coil former, a reshaped and carefully damped chamber, as well as being shipped/sold in matched pairs. I'll admit, the $91 price tag seems a bit high for production with a glass-reinforced plastic faceplate, but truth is you don't find titanium formers in very many drivers that cost less than $100. Normally they are aluminum, glass fiber, or Kapton. Seas uses a Corian material in their diamond line tweeters, so maybe they don't use metal faces often either. (I see Excel units are cast faces) The faceplate is really thick when it comes down to having plastic faces of any sort, along with what appears to be a metal hexagrid. The chamber cup and integrated divot remind me of those in the DX/XT line from Peerless, basically a sinusoidal curve of Pi length rotated around the Y axis. It's not quite a half-torus shape. Being that the TBFC is a bit splashy, and these have a copper cap to reduce HD, that is what tickled my fancy. More on the tweeter choice will come when I start posting info about the design path.

New Seas 27TAC/GB, some facts, some opinions, and some data... — MAC/DIY

454Casull · 10th November 2019, 04:14 AM

Didn't the D2004/602000 have off-axis measurements posted before?

ScanSpeak D2004/602000 | HiFiCompass

HiFiCompass · 11th November 2019, 10:18 AM

Quote:

Originally Posted by 454Casull

Didn't the D2004/602000 have off-axis measurements posted before?

ScanSpeak D2004/602000 | HiFiCompass

No, didn't

Pida · 11th November 2019, 10:46 AM

D2004-6020 horizontal responses 0-90deg, with 10deg steps attached. Measured in NE3W enclosure, 1m, gating ~4ms.

HiFiCompass · 14th November 2019, 05:49 PM

A review of the first PURIFI PTT6.5W04-01A midwoofer:

PURIFI PTT6.5W04-01A midwoofer review | HiFiCompass

Martigane · 14th November 2019, 06:01 PM

I looked at the surround and laughed thinking this would be crap.
Then I looked at the measurement and stopped laughing.

Oneminde · 14th November 2019, 06:10 PM

On standby for the Bliesma T25 series subjective review

and I've got to read the article about the Purifi woofer

HiFiCompass · 14th November 2019, 06:14 PM

Quote:

Originally Posted by Oneminde

On standby for the Bliesma T25 series subjective review

and I've got to read the article about the Purifi woofer

Yes, I remember

briskly · 14th November 2019, 08:58 PM

Quote:

100 W (noise) and 350 W(!) (IEC)

Is 350W the IEC "long-term" power rating?

14th November 2019, 06:10 PM	#478
Oneminde diyAudio Member Join Date: Jun 2014 Location: Darkside of the moon.	On standby for the Bliesma T25 series subjective review and I've got to read the article about the Purifi woofer __________________ In order to become sane in an insane world, you must first become insane.

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10th November 2019, 04:14 AM	#473
454Casull diyAudio Member Join Date: Jan 2004 Location: Toronto, ON, Canada	Didn't the D2004/602000 have off-axis measurements posted before? ScanSpeak D2004/602000 \| HiFiCompass

14th November 2019, 05:49 PM	#476
HiFiCompass diyAudio Member Join Date: Jan 2018	A review of the first PURIFI PTT6.5W04-01A midwoofer: PURIFI PTT6.5W04-01A midwoofer review \| HiFiCompass

14th November 2019, 06:01 PM	#477
Martigane diyAudio Member Join Date: Apr 2018 Location: Belgium	I looked at the surround and laughed thinking this would be crap. Then I looked at the measurement and stopped laughing.