CHANGSTAR: Audiophile Headphone Reviews and Early 90s Style BBS

Lobby => Headphone Measurements => Topic started by: Marvey on March 22, 2012, 10:46:31 PM

Title: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: Marvey on March 22, 2012, 10:46:31 PM
Beyer T70p Frequency Response Graph

One of the best driver matches I've seen. Has Beyer been reading my posts?
(http://www.changstar.com/index.php?action=dlattach;topic=182.0;attach=869;image)
Floor or waterfall plots are at -36db. The usual warnings on noting the axis bounds apply.
Title: Re: Beyer T70 Frequency Response and CSD Waterfall Plots
Post by: maverickronin on March 22, 2012, 11:30:56 PM
One step forward two steps back?
Title: Re: Beyer T70 Frequency Response and CSD Waterfall Plots
Post by: rhythmdevils on March 23, 2012, 12:04:30 AM
What a beautiful treble peak.  Makes me want to go mountain climbing! 

HOS.
Title: Re: Beyer T70 Frequency Response and CSD Waterfall Plots
Post by: rhythmdevils on March 23, 2012, 12:10:21 AM
(http://pubs.usgs.gov/gip/dynamic/graphics/Half_Dome.gif)
Title: Re: Beyer T70 Frequency Response and CSD Waterfall Plots
Post by: LFF on March 23, 2012, 12:40:49 AM
LOL!  ;D
Title: Re: Beyer T70 Frequency Response and CSD Waterfall Plots
Post by: ocswing on March 23, 2012, 01:57:55 AM
Who looked at that and thought, "Yeah, that's the FR I want in my headphones." Oi, glad I passed on them regardless of price.
Title: Re: Beyer T70 Frequency Response and CSD Waterfall Plots
Post by: Anaxilus. on March 23, 2012, 04:49:10 AM
Who looked at that and thought, "Yeah, that's the FR I want in my headphones." Oi, glad I passed on them regardless of price.


Actually I thought the FR was of Godzilla falling on Tokyo again.


Btw, which way is the Z-axis on that thing?
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: briskly on April 12, 2012, 09:40:04 PM
This explains everything, specifically why all my attempts at EQ failed miserably. Tesla for the lose.
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: Hawaiiancerveza on July 02, 2012, 05:28:38 AM
Would these be the same with the T70?
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: Marvey on July 02, 2012, 05:35:19 AM
The T70 is different. On the EQ thing, I find that headphones which are already well behaved or have certain excellent sonic traits are easier to EQ.
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: gurubhai on July 02, 2012, 05:47:44 AM
Would these be the same with the T70?
We don't even know if another T70p would be same .... :P
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: Marvey on July 02, 2012, 05:48:53 AM
blurrrrrrb.... spit out my thai ice yea over the keyboard!
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: Hawaiiancerveza on July 02, 2012, 06:48:32 AM
MMM.. I see.  Would you be doing a measurement on the T70?
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: rhythmdevils on July 02, 2012, 06:53:38 AM
If someone sends him a T70 ;)
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: Hawaiiancerveza on July 02, 2012, 08:08:57 AM
Haha I guess so huh...lol and that can't be me... ???  Oh well... I'll just have to wait till someone does!   ;)
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: maverickronin on July 02, 2012, 09:33:25 PM
I heard a T70 that sounded fairly similar to what was measured here though maybe with less severe ringing.  It was bright, but otherwise sounded pretty great right up until it hit the ringing in the treble.  Then it sounded like an explosion at a consonant factory.

Also the T70's that Tyll Measured over at InnerFidelity looked pretty similar to the T70p.  They have the same deep and narrow nulls that usually indicate ringing on purrin's CSDs.
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: Hawaiiancerveza on July 02, 2012, 11:06:33 PM
Ahh I see.  Doesn't seem like the Telsa tech is doing very good at all.  Didn't the Dt880 get better measurements than the T90 and T70?
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: AstralStorm on September 26, 2012, 02:51:40 PM
Hello. It's suprising, but I think my new pair is not that bright and is less peaky.
There is some relatively mild resonance at 6k and 8k. with concommittant dips at 7k and 9k. No other peaks.
(Less ringing than e.g. Hifiman RE-272, VSonic GR07, Grado RS1, Beyerdynamic DT1350 (which have huge 14k ringing).)
I don't find them all too bad w/o EQ either. Somewhat dryer sounding and a bit nearer and more concentrated in soundstage.

Perhaps my HRTF is just that weird, or your specific SN was a factory reject?

By ear equalization (reference -15 dB @ 500 Hz; no smoothing):
(http://wstaw.org/m/2012/09/26/Beyerdynamic-T70p.png)

Or perhaps it's yet more evidence of Beyerdynamic QC issues...
Also the highs change based on front/back placement around ears a lot. Best obviously when centered. When pushed 2 cm to the back, they get piercing like what the graph in the first post would suggest.

For reference: SN03324.
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: rhythmdevils on September 26, 2012, 07:31:31 PM
There's no way Purrin could always receive "bad units".  It's just not possible.  Beyer QC has been shown to be terrible esp with the Tesla models so who knows if yours is better or not.  But "bad unit" implies that most are consistent, the bad one being the outlier. 

Best way to know for sure is to send yours in.  :-)
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: roBernd on September 26, 2012, 09:19:46 PM
well, the graphs come close to what I was hearing when I had the chance to compare them to the DT880/990...
If there are "bad units"... they sadly are the three-leafed clovers on the meadow.
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: AstralStorm on September 26, 2012, 11:06:59 PM
Suprisingly though, my T70p fares much better than loaner T1 and my older DT1350. Relatively better than any of the IEMs too. The most problematic is the 5-6k hotness (not ringing apparently, or relatively low), as it causes the soundstage to flatten and warp, not unlike old GR07, but without (or with much less of) the ringing which caused sibilance with it.
Also, it could use 10 dB more adjustment for the highest end > 17kHz. It's there all the way up, but is very quiet.

Unfortunately, I was unable to find a closer match in terms of signature than these that's also technically proficient.

I probably should send them in for measurement some day. The tricky part is that overseas shipping is pain and expensive. First, I might ship DT1350 first to see what was the baseline performance for comparison purposes.

--
I agree, these sound reasonably close to DT880-250 which I've auditioned side by side. However, 880s had even stronger 5-7k boost, but were a bit smoother and had notably recessed mids. They also sounded far... harsher or colder I think. Distortion?
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: maverickronin on September 27, 2012, 12:58:18 AM
(http://graphs.headphone.com/graphCompare.php?graphType=1&graphID[]=2751&graphID[]=3321)

The 880s are cold and metallic.  The T70s have a better timbre.
Title: Re: Beyer T70p Frequency Response and CSD Waterfall Plots
Post by: Anaxilus. on September 27, 2012, 03:32:16 AM
That DT880/600 seems to be an outlier compared to the others DT880s.


(http://graphs.headphone.com/graphCompare.php?graphType=1&graphID[]=963&graphID[]=953&graphID[]=1973&graphID[]=2751)


$2,000 v. $120  :)p17


(http://graphs.headphone.com/graphCompare.php?graphType=1&graphID[]=3841&graphID[]=1473&graphID[]=1973&graphID[]=3431)