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Author Topic: Beyer DT1350 Frequency Response and CSD Waterfall Plots  (Read 6425 times)

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Marvey

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Beyer DT1350 Frequency Response and CSD Waterfall Plots
« on: March 04, 2012, 07:09:54 AM »
Beyer DT1350 Frequency Response and CSD Waterfall Plots.

Driver matching is nothing short of horrible. Yay for Beyer. T1 repeats itself.

Voice comes from left of center. The matching gets better as the frequency increases - so the imaging is kind of wierd.

CSDs are at -30db and -40db floors. Very clean with the exception of a spike near 15k. The spike there wasn't that noticeable to me, probably because it's down in comparison to the rest of the spectrum below it - rather unlike the Ultrasone ED8.

Audibly the three major dips at 150Hz, 3kHz, and 8kHz are hurtful and contribute to its funny tone. Subjectively the tonality of the headphone doesn't have anything horrible sounding (in terms of nasty spikes that destroy our hearing), but it just kinda sounds "not good." Mid-bass dip is never good.
« Last Edit: March 04, 2012, 07:34:56 AM by purrin »
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Anaxilus.

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Re: Beyer DT1350 Frequency Response and CSD Waterfall Plots
« Reply #1 on: March 04, 2012, 07:17:41 AM »
I guess the QC wasn't fixed after all.  Just have to get lucky.
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Marvey

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Re: Beyer DT1350 Frequency Response and CSD Waterfall Plots
« Reply #2 on: March 04, 2012, 07:19:17 AM »
Quote from: Analixus on March 04, 2012, 07:17:41 AM
I guess the QC wasn't fixed after all.  Just have to get lucky.


updated with more graphs. what were the QC issues with these?
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Anaxilus.

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Re: Beyer DT1350 Frequency Response and CSD Waterfall Plots
« Reply #3 on: March 04, 2012, 07:28:15 AM »
Oh wait, I'm thinking of the T50p.  Forgot this was sort of the fixed/updated version w/ the same Beyer QC.
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ocswing

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Re: Beyer DT1350 Frequency Response and CSD Waterfall Plots
« Reply #4 on: March 04, 2012, 07:41:08 AM »
Nice to see the reasoning behind the weird tonality. I mostly noticed the dip at 3k, but couldn't pinpoint it when I was listening. There are some posts on HF that show different damping material in the driver housing between the early serial and later serial numbers. Do we know which this is?
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rhythmdevils

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Re: Beyer DT1350 Frequency Response and CSD Waterfall Plots
« Reply #5 on: March 04, 2012, 07:45:09 AM »
Interesting.  I think these are the same pair I heard and I didn't notice the channel imbalance.  But I couldn't listen to them for long, I really agree that they have a strange sound that seems "good" at first because nothing was really jabbing but at the same time you're thinking "something is really wrong here".  I thought the treble sounded tinny, maybe that was caused by the rather large mountain range.  I thought they also lacked warmth and bass.  I was guessing they'd have some dip somewhere in that upper bass/lower mids area. 

It's fun to guess what the graphs will look like.  Not easy when it's made by Beyer! 
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Marvey

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Re: Beyer DT1350 Frequency Response and CSD Waterfall Plots
« Reply #6 on: March 04, 2012, 07:48:20 AM »
Quote from: ocswing on March 04, 2012, 07:41:08 AM
Nice to see the reasoning behind the weird tonality. I mostly noticed the dip at 3k, but couldn't pinpoint it when I was listening. There are some posts on HF that show different damping material in the driver housing between the early serial and later serial numbers. Do we know which this is?

s/n 12###

Some thoughts:
  • There's definitely some trouble in the treble too - it's uneven.
  • IMO, a little bit of warmth and bass bump (at least with my measurements) from 100-200Hz is required for headphones to sound right. Think SRH840: it lacks a bump in this region - so it too sounds a little cold and antisceptic.
« Last Edit: March 04, 2012, 07:50:22 AM by purrin »
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Marvey

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Re: Beyer DT1350 Frequency Response and CSD Waterfall Plots
« Reply #7 on: March 04, 2012, 07:55:40 AM »
One thing to be aware of is that I think my measurement system is a little bit off in terms of measured FR tilt when it comes to the supra-aurals. Here is a comparison of three supra-aurals:

V-Moda M80 (my favorite of these) - slight bump at 1.5k


HD25-1 ii - has sharp treble peaks and excessive bass


DT1350 (again) - sounds thin and cold compared to the others
« Last Edit: March 04, 2012, 07:58:04 AM by purrin »
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RexAeterna

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Re: Beyer DT1350 Frequency Response and CSD Waterfall Plots
« Reply #8 on: March 04, 2012, 07:43:49 PM »
very interesting. i didn't know the dt1350 had bad QC. i thought it was only with the T1 and other tesla line-up. maybe i can ask a friend if he be willing to send his DT48A(1960's model) for some measurements if interested. i'm personally curious about the dt48A and DT48S models the most but there so dang hard to get a hold of(well on ebay and stuff. i don't have 500 bucks to blow for a new pair of DT48A model and then you have to wait few weeks cause they're still hand built and matched since the 1950's).
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Anaxilus.

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Re: Beyer DT1350 Frequency Response and CSD Waterfall Plots
« Reply #9 on: March 04, 2012, 10:04:43 PM »
Quote from: RexAeterna on March 04, 2012, 07:43:49 PM
very interesting. i didn't know the dt1350 had bad QC. i thought it was only with the T1 and other tesla line-up. maybe i can ask a friend if he be willing to send his DT48A(1960's model) for some measurements if interested. i'm personally curious about the dt48A and DT48S models the most but there so dang hard to get a hold of(well on ebay and stuff. i don't have 500 bucks to blow for a new pair of DT48A model and then you have to wait few weeks cause they're still hand built and matched since the 1950's).


Oh please, I've been dying to hear the DT48 forever.  Btw, I confused the 1350 w/ the T50p but seems they fall far from the tree anyway.
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