driver. Most of the ‘attack’ in instruments is in the 2kHz to 5kHz range in reality. As this is an open headphone distortion levels and spectrum plot performance may thus be better in reality than as shown on the plots. Cyber Monday 2020 deals: $35 Google Home, $80 Echo Show 2-pack, $449 HP laptop, $179 Chromebook and more Soundwise, I prefer the more Hi-Fi sound from my T51i to the more neutral sound of the HD 650. Look at the scale the differences are quite enlarged in this plot. The HD 650 are smooth and clean, and have great deep bass. Use the DT880 at loud levels, while the HD 650 sound better played softly. The 300Ω HD650, however is 105dB when 1V is applied so while the impedance is lower the efficiency (dB/mW) is also lower. Note that this headphone was measured at  where  background noises were present in the demo room. The measurements are done with the same test-voltages from a low output R amplifier and the same driver/channel. 4.9 of 5 ★ ★ ★ ★ Dan-music lover-technology enthusiast. 9.130 oz. I have to play movies at 3/4 to full level, where with 32 Ω headphones I play the same things at about 1/2 to 3/4. Build quality. With 10N on the entire surface of the pads the total height of the pads was only reduced from 32mm to 27mm. (My HD650 cans sound a bit rubbish through my Babyface first gen that has a poor headphone amp and impedance mismatch, and as much as I worship Sonarworks for my monitors, switching it on for the cans is well... meh) Someone with more energy can tell the maths. Below a picture of the new pads with the exact same weight pressing on it. You may or may not be happy with these as plugged into 3.5mm jacks. It’s not notably uncomfortable, but if you’re unfamiliar with this model, it will take a little getting used to. No deep rumbles on an impressive level but still quite audible. All have the same sound and impedance curves, and vary simply in their voltage sensitivity while the power sensitivity stays the same. The subjective ‘speed’ of a headphone is often said to relate to the highest frequencies a headphone can reach. This is considered the ‘veiled’ version and indeed can sound slightly subdued in the highs. The new pad is more balanced and the ‘warmer’ signature is gone. They are a little duller than most headphones. Also distortion is quite low and it shows why it had been the top model of Sennheiser for quite some time. Instruction manual HD 650 (3.1 MB) Download. Above 10kHz the HD650 has about 1.5dB more output. On the violin soloist passages, the HD600 is a clear favorite, but when the drama comes, I am not quite as sure on which is better. Below a plot of the HD650 (with new pads) when driven from a 0.1Ω amplifier and a 120Ω output amplifier (Ember prototype was used).As can be seen the mid bass is increased by about +1dB and the upper treble by about +0.5dB. They are optimized for use with real Hi-Fi or professional equipment. With an impedance of 150 ohms, these headphones are much easier to drive than the other 2. EU Declaration of Conformity HD650 series (1.1 MB) Download. (mind the dB scale which is 2dB/div in this plot)The veiled HD650 (a 2014 silverscreen by the way) clearly has 3 to 4 dB less output compared to the quite new HD650 (2017). The DT880 are brighter, lighter and clearer than the HD 650. Tous droits réservés. The HD 650 have been tops for home and professional use for over a decade. Fortunately the HD650 responds great to a proper EQ. The HD650 has an exceptional good frequency response but is ‘tuned’ to sound speaker like and lacks bass extension and to some sounds ‘veiled’ because of this. The bigger the deviation the stronger the effect. They sound great for portable use, but won't go as loud as 32 Ω headphones. The measurements of the headphone above are made with a black driver + old type pads. They are very well made, comfortable and durable. It's far better to spend $500 on headphones and $100 on an amplifier than to spend $200 on headphones and $300 on an amplifier. Setting a treble control to about +2 dB at 10 kHz makes these sound closer to other common headphones. 2% distortion around 50Hz is not bad but also not a poor value. It's great people like you who allow me to keep adding to this site full-time. The shape of your head, bone structure, pad size, pad ‘softness,  (compliance), hair or no hair and or wearing glasses may (drastically) change the frequency response of some headphones, so… your personal experience may differ substantially from these plots. Oktober 2003 2:44 14. I like the HD660S sound thanks to its heightened treble tuning. SIGNAL PROCESSING: Here we enter controversy. What became quite obvious is that while the old and new pads differ only slightly in height when laying flat on the table (30mm vs 32mm) as shown in the picture above, but the pads compress in a substantially different way when being pressed against the skull with the same clamping force. The sound doesn't change much as moved around my head. As open headphones, there's about as much sound coming out the back. These HD 650 are so loved because they give us the exact sound that's in our recording, nothing more and nothing less. Otherwise you’ll get extra mid-bass which is the last thing this headphone needs. Frequency curve diffuse-field loudness equalization Nominal impedance 300 ... Seite 12 Montag, 6. From 600Hz up the headphones are very similar. Dynamic driver headphones do not have a perfectly flat impedance response across all audible frequencies. It's deep, solid and tight —  but only if its recorded that way. Their 300 Ω impedance lowers the distortion from all devices, and their sensitivity is optimum so we won't hear any amplifier noise. Replacement part number 050635, about $70 the pair. For pro music editing you might want to drive them from an outboard amplifier, but for music, most people probably don't realize that the newest iMacs have great headphone amplifiers. Below the driver in question. They are suited for HD545 / HD565 / HD580 / HD600 / HD650 / HDI850. This HD650 thus has audibly less output and sounds ‘darker’ than the HD650’s I heard and measured before. What isn’t very obvious when wearing these is the fact that the old pads compress a lot more than the newer (less compliant) ones. Using the older pads the drivers are thus much closer to the ears which results in a slightly higher SPL below 1kHz. Therefore they aren't as exciting to listen to for music enjoyment; they'll sound duller than more common headphones or the more Hi-Fi oriented HD 800. Sennheiser HD 650 on-head measured impedance, right side. These HD 650 sound slightly cooler; the T51i slightly warmer. Nominal impedance. Sennheiser has newer and more expensive HD 800 and HD 700 headphones for consumers more impressed by fancy boxes, fancy cables and goofy-looking semimetallic housings, while these professional HD 650 sell for much less today because they have been in the catalog for so long and they are made of more practical materials. Gently apply some pressure by blowing a little and the dome pops back in original position. The SPL was level matched at 1kHz to compensate for the level differences caused by voltage division. These have extremely low distortion on voices and woodwinds, with a very fluid tube-like midrange. I usually have the product code: 050635 me with a special grip! 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