Its so cool all the creativity they used to put in headphones, most headphones today have a very standard setup, but before we had this all figured out it really was the wild west.
Wow, now I feel old, thank you. I own a Ultrasone PRO 750 since 2008 I think. They seem to be very differently tuned from these you have, for the sub-bass in the 750s is simply stunning; even with the frustrating level of isolation they offer, it frequently shows me stuff I can't hear in my perfectly sealed IEMS. You are completely right in saying they were made to be listened to at low volumes. I guess this has to do with the fact that all old Ultrasones were aimed at professionals (for a while, they were popular for monitoring, and that's why I got mine), thus the stupidly long cables and the sturdy build - they will clearly last forever. I noticed the audiophile people seem to love or hate Ultrasone. I am a Taoist, so I love and hate them simultaneously all the time.
Awesome thanks. The burnt orange pads are classic. Last count I'm at 5 different models, but never had the chance to hear those 2200. As far as I know this model got a revamp colour change and became the HFI-2400. Kind of a pain to find speed swap pad replacements but a person can carefully cut out their own thin plastic tabbed rings ( trace the originals ) and bond new production pads to those new rings using a bit of sandpaper and then contact cement and voila ( hit up a plastic shop for thin styrene sheeting ) Did that with a pleather pad variant on these round cups. Will be grabbing a few more models down the road. Thanks very much for covering this one!!!
Hi Those two components at the driver are diodes. Since they are parallel to the driver and opposing each other in polarity, they are most likely Zener diodes, which would be used as a sort of overvoltage protection, or volume limiter. Once the headphone input signal is higher than the Zener voltage of the reversed diode + 0.7V of the other diode, the impedance the amplifier has to drive will be much lower. The impedance will sink up to the point at which the amplifier begins to clip.
Finally! Someone knows what these things are. I've been wondering about this for ages. Are there also diodes on the Beyerdynamic? I knew they were used as something like volume/overload limiters, but not what the actual component was. Thanks for clearing that up.
@@GREQReviews Indeed The Beyerdynamic diver in your video also has diodes on it. What Headphone is it from? You can actually find the 80 Ohm version of the DT770 with a passive „99db limiter“ Altough, limiting the output of efficient, low to medium impedance headphones to only 99db, wouldn't require Zener diodes. The DT770s have 96db/mW, or 99db/2mW --> P= (U^2) / R --> U = √(P*R) --> U = √(0,002*80) = 0,4V at 99db output Therefore you would only need two „normal“ antiparalell diodes. With higher volume, let's say 111dB, you would, in case of the 80 Ohm DT770, already have 1,6V. At this point it would make sense to use oposing polarity zener diodes. I think it should be possible to test the reverse breakdown voltage with a good multimeter, and calculate an approximate volume level, at which the cricuit would be effective.
@@setech6788 I don't remember which model it's from, I've had it for many years. I also had a DT790 once which apparently had passive limiters in, but I don't recall seeing anything similar inside. Interesting sttuff.
The cable going out backwards encourages the cable to hug the chest and stay close to the body, to prevent it from getting caught on things. Much preferable to going out forwards ime.
Its so cool all the creativity they used to put in headphones, most headphones today have a very standard setup, but before we had this all figured out it really was the wild west.
Wow, now I feel old, thank you.
I own a Ultrasone PRO 750 since 2008 I think. They seem to be very differently tuned from these you have, for the sub-bass in the 750s is simply stunning; even with the frustrating level of isolation they offer, it frequently shows me stuff I can't hear in my perfectly sealed IEMS.
You are completely right in saying they were made to be listened to at low volumes. I guess this has to do with the fact that all old Ultrasones were aimed at professionals (for a while, they were popular for monitoring, and that's why I got mine), thus the stupidly long cables and the sturdy build - they will clearly last forever.
I noticed the audiophile people seem to love or hate Ultrasone. I am a Taoist, so I love and hate them simultaneously all the time.
Awesome thanks.
The burnt orange pads are classic.
Last count I'm at 5 different models, but never had the chance to hear those 2200.
As far as I know this model got a revamp colour change and became the HFI-2400.
Kind of a pain to find speed swap pad replacements but a person can carefully cut out their own thin plastic tabbed rings ( trace the originals ) and bond new production pads to those new rings using a bit of sandpaper and then contact cement and voila ( hit up a plastic shop for thin styrene sheeting )
Did that with a pleather pad variant on these round cups.
Will be grabbing a few more models down the road.
Thanks very much for covering this one!!!
A great review 😎👍🏼
Hi
Those two components at the driver are diodes.
Since they are parallel to the driver and opposing each other in polarity, they are most likely Zener diodes, which would be used as a sort of overvoltage protection, or volume limiter.
Once the headphone input signal is higher than the Zener voltage of the reversed diode + 0.7V of the other diode, the impedance the amplifier has to drive will be much lower. The impedance will sink up to the point at which the amplifier begins to clip.
Finally! Someone knows what these things are.
I've been wondering about this for ages.
Are there also diodes on the Beyerdynamic?
I knew they were used as something like volume/overload limiters, but not what the actual component was.
Thanks for clearing that up.
@@GREQReviews
Indeed
The Beyerdynamic diver in your video also has diodes on it. What Headphone is it from?
You can actually find the 80 Ohm version of the DT770 with a passive „99db limiter“
Altough, limiting the output of efficient, low to medium impedance headphones to only 99db, wouldn't require Zener diodes.
The DT770s have 96db/mW, or 99db/2mW --> P= (U^2) / R --> U = √(P*R) --> U = √(0,002*80) = 0,4V at 99db output
Therefore you would only need two „normal“ antiparalell diodes.
With higher volume, let's say 111dB, you would, in case of the 80 Ohm DT770, already have 1,6V. At this point it would make sense to use oposing polarity zener diodes.
I think it should be possible to test the reverse breakdown voltage with a good multimeter, and calculate an approximate volume level, at which the cricuit would be effective.
@@setech6788 I don't remember which model it's from, I've had it for many years.
I also had a DT790 once which apparently had passive limiters in, but I don't recall seeing anything similar inside.
Interesting sttuff.
The cable going out backwards encourages the cable to hug the chest and stay close to the body, to prevent it from getting caught on things. Much preferable to going out forwards ime.
Huh! So the S-Logic actually do something! I mean, I didn't get them because of that but rather cause 🐻
i believe ULE stands for ultra low emission. reffering to their emf shielding technology
Thanks! That actually makes sense
All Ultrasone isnt good I guess except Signature Pro, Studio etc.
The Edition 8 was pretty neat too.
@@GREQReviews yes