Don’t think this is very detrimental to the sound. Fig. At first glance, the AKG K 271 MKII doesn’t seem to be that unusual, but it does … See frequency response graph. Beyond studio uses, closed-back headphones are perfect for casual listening, listening at the office, and commuting. The lower the low-frequency response, the stronger and juicier the bass. This plot shows the K7XX has a different driver with more bass extension than the K701 fitted with the same pads. The bigger the deviation the stronger the effect. Some headphones have cable entries on the right. I also tested the black foam ring used in the K7XX and a foam disc (Superlux netted foam) but these all gave the same results. Below the difference in response on the square-wave and impulse response between the stock version (upper 3 scope shots) and with the Toilet Paper applied (lower 3 shots). When you find the bass levels O.K. are over-accentuated. This shows the resonances are effctively damped. The white with grey and brown accents differs from that of most other headphones. 32 points. When it comes to the frequency response spectrum, as long as a pair of headphones is capable of reproducing sound within the 20 Hz – 20,000 Hz audible spectrum, it is considered fine. (Left and Right are superimposed)The dip around 4kHz is not a resonance in disguise. Aside from the narrow 15kHz resonance (Left channel) and 16 kHz (right channel) the waterfall plot looks quite good. Its supposedly bassier due to the memory foam. Still felt the same that I did when I remembered the k701. The treble is over accentuated and has enough ‘air’ but isn’t really ‘smooth’. The K701 is an open headphone with a dynamic driver. The K701 has been around for many years already, just like the DT880 and HD650 and have been surpassed as ‘TOTL’ headphones for these brands but still are good performers. Below the CSD of the K701. As the K701 is not a high efficiency headphone this too suggests it is not designed for portable usage. Below the square-wave response of the K701. It sounds a bit too bright and can have a shrill ‘edge’ with some music. The foam is just lying on the driver and pressed onto the driver using netting integrated in the pads. The lower frequencies are quite well damped and ‘stop’ fast. 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. One difference between AKG K712 Pro vs HD600 is that AKG K712 Pro comes with two cables, instead of one. Hence, AKG K702 has been praised as an excellent tool for making music. The 100μs pulse shows the correct amplitude but the pulse on the top of the signal shows overshoot and quite a lot of ringing. I owned a pair of K701's and I found the treble emphasis they had not faithful to the original recordings I listened too. The bass response is full, accurate, and tight. This headphone is quite comfortable and can be worn for long periods without getting too ‘hot’ on the ears. Below the Frequency Response of the K701 via the Kameleon (Left, Right). Below the tonal balance differences between the old rivals K701, DT880 and HD650. Home > Headphones comparison > AKG K701 vs Yamaha HPH-200. Below the stock K701 (but with 1 ply of toilet paper) vs driven by the kameleon (also with 1 ply of toilet paper), Bass response is extended and lifted in amplitude, the 2kHz peak is now at the same level as the mids and the 6kHz peak has been lowered to normal levels. AKG K702: Design. The nuances of sound are much more in depth than a graph could ever show. AKG K701. The overall sound is ‘open’, dynamic and very ‘forward’ as well as ‘detailed’. The bright ‘neutral’ signature can be improved by EQ or as described above. type: open back fit: circumaural (over ear) impedance: 250 Ohms frequency response: 5 Hz – 35,000 Hz material: velour ear pads, rugged plastic, metal headband: spring steel, soft cushioning … vs. AKG K712 Pro. Efficiency: 90dB/1mW (102dB/1V) The 2nd harmonic distortion remains well below 2% in the bass which is to be expected from a relatively small (40mm ∅ dynamic driver). The impedance of most consumer grade headphones is usually rated at 1mW. power rating: 0.2W (200mW) The small ‘bump’ around 2kHz makes the mids sound a bit too ‘forward’ but not in an annoying way. The foam isn’t doing much here. The lower the low-frequency response, the stronger and juicier the bass. To test this the headphone is measured via a low impedance amplifier (0.2Ω) and a high impedance amplifier (120Ω). Looks beautiful, CHANGSTAR: Audiophile Headphone Reviews and Early 90s Style BBS, AKG K701 Frequency Response and CSD Waterfall Plots, Topic: AKG K701 Frequency Response and CSD Waterfall Plots  (Read 17382 times), Re: AKG K701 Frequency Response and CSD Waterfall Plots, https://www.facebook.com/SchrodsonkMuseum, Quote from: shipsupt on June 20, 2013, 09:21:01 PM, Quote from: hans030390 on June 21, 2013, 05:51:37 PM, SimplePortal 2.3.5 © 2008-2012, SimplePortal, Master of Revelatory Bird Calls and Fine Art. The headphone reviewed and measured has seen many, many, many hours on it already. I swapped out the foam disc in front of the drivers for a different material. AKG K701 review These AKGs are beautifully built and feel like they’d survive years of use with ease, but there are more entertaining headphones out there Tested at £250.00. Skip K701 and K702 since these are lighter in the bass, and more forward sounding. On the left the K701 driver with the foam removed, on the right the stock K701 driver with the foam in front of it. AKG k702 frequency response. (lots of) hair between the headphone and ear or an ear shape that does not allow a proper seal will affect the tonal balance. The open back ear cups are large and circular and covered in a suede-like padding that gives the headphones a premium appeal. The headband can adjust over a wide range but isn’t padded. On a higher output resistance amplifier the output level will be considerably lower. S.P.L. Around 2.5kHz there is a little lingering (the small bump in the FR, it seems happy to vibrate at that frequency) but is very low in level. That ~2KHz spike is still there, though, and I couldn't believe how grating that ended up being on my ears after a while. For an affordable headphones, AKG K701 and Beyerdynamic DT 1770 Pro are two comparable choices. Link AKG Audio on Tumbler. vs. vs. 17 facts in comparison. Bi-wired oxygen-free copper cables optimize channel separation. I think these sound pretty nice overall. 99. I do not use smoothing because some info about sound quality is lost when plots are smoothed. Usage: Home, Studio ... but some of the sound differences are fairly subtle when you take a gander at the frequency response on both. D3 is just too high over 0.1% to 800Hz. Material: Leather headband, plastic, memory foam. Below the frequency response of the K701 (Left, Right)Channel matching is excellent. 28000Hz. A ‘horizontal‘ frequency response curve on the shown frequency response plots on this website thus indicates a perceived ‘flat’ tonal signature. akg k371 frequency response graph. Colour: white or black Below the same plot but the mids are overlayed. AKG is the first manufacturer in the world to use revolutionary flat-wire technology in headphones, namely the K 701. The narrow treble peaks (6kHz, 12kHz and 16kHz) are clearly resonances. Bass extension isn’t great and it starts to audibly roll-off from 100Hz down. The AKG K701 is a sturdy work horse. It does not push hard on my head but one does feel a small contact point and the cups have a small tendency to drop a little lower in my case. Unfortunately, it's not available for win7 yet. Didn't sound bad but had had a bite to them which bothered my ears with certain tracks and the vocals sounded bit odd. I think the foam disc is a good thing in the headphone. Interestingly the K701 becomes more efficient with these pads (about 4dB) in the mids and the treble peaks are somewhat less elevated. As this is a dynamic headphone the frequency response might be amplifier output resistance dependent when certain higher output resistance amplifiers are used. If you are using a screen reader and are having problems using this website, please call (888) 452-4254 for assistance and don’t crave for more ‘body’ to the sound fitting some K712 pads and applying 1 ply of toilet paper may be an easy way to reduce the clarity and brightness of the K701 while not turning it into a bassy or muddy headphone. The result is a claimed frequency response range of 10 Hz to 39.8 kHz – on a par with headphones costing north of £1,000 including the much-lauded … The cable terminates in a 3 pin 6.3mm TRS jack. Forums. Of course this is there for a reason. There is only one big downside (which is still a problem with similar looking AKG models) which is the elastic bands loose their elasticity over a few years already. LOJAS AS MELHORES LOJAS PRA VOCÊ E SUA FAMÍLIA. The plots above show the ringing is substantially damped by the thin ply of toilet paper. Below the spectrum plot of the K701 (Right channel). These headphones do not emphasize any part of the frequency response range; everything is sounding exactly like the source. 39800Hz. I think the new pads primarily help boost the bass a bit. The pads are velour with standard foam inside. Bass hardly reacts. Apparently the pads are different (confirmed) and the drivers are cherry-picked and closely matched (AKG's claim). In days gone by the K701, Beyerdynamic DT880 and Sennheiser HD650 ruled the consumer headphone world and each had/has their own fanbase. The mids from 200Hz to 3kHz are pretty flat and make the mids sound ‘neutral’. Add to that the K701 is an open headphone and that it does not play sufficiently loud from phones/tablets and cheap DAPs makes it obvious this headphone is only really suited for home and studio usage. As the seal of a headphone is of importance some experiments are done to see the effect. Advantages AKG K701 over Beyerdynamic DT 1770 Pro All this combines for an appealing and eye-catching finish that radiates quality. The flatter the frequency response – the higher the score. 0 Members and 1 Guest are viewing this topic. They can be replaced but is expensive and not easy to DIY. L and R markings are located on the headband. The AKG K702 share the same style and build as the AKG K701 and AKG K712 PRO. Weight: 235 g. AKG engineers considered the entire signal path from amplifier to eardrum when designing the K701. Driver type: dynamic For the going streetprices (around € 130.-) this is a good and comfortable headphone that can take a beating. There is a pretty big distinction in their impedance, as AKG K701 has only 62 Ohm, whilst Sennheiser HD600 has 300 Ohm. Comparison winner. Max. The AKG K271 is easy to use but doesn’t suffer for its simplicity. This also points toward less refined treble. Beyond 1ms the signal drops gradually and shows the bass roll-off. The treble is lowered by 1 dB as well so these pads make the sound of the K701 less ‘bright’ and less ‘forward’. Hi guys. The 2nd harmonic distortion is probably lower than 0.2% around 1kHz as limits of the test rig are around that level. ALL measurements are made with a good SEAL on a flatbed measurement rig. Link AKG Acoustics on Youtube. The K701 is very easy to drive though with its 62Ω impedance. Now I wonder how the k712 will sound. The ‘details’ in the music are ‘fake’ due to the 6.5kHz peak. Bass is light but is ‘tight’ and well textured. I recently heard about sonarworks reference3 which seems to be the better and more in depth going alternative to arc2 which i am using. AKG K702 Box. Headphone connector: fixed entry. Broad D2 increase in bass, including upper bass. voltage: 3.5V 2. highest frequency. Below: Perfect seal, a small seal breach by thin armed (reading) glasses just above the skin, thick armed glasses and a big seal breach.A seal breach isn’t really problematic at all. Cable: 3m terminated in 6.3mm TRS + 3.5mm adapter Below the step response of the stock K701 and via Kameleon (both with toilet paper mod)The bass response is improved a lot, alsso the ringing and peaking is a lot lower in level. The headphone is light in weight. Pad dimensions: Ø 55mm , depth: 25mm The clamping force is medium and pleasant but this particular headphone has already been worn for quite some time. Driver size: ø 40mm The k701 comes with a presentation stand and 6.3mm adapter. It is a bit bass light but the bass itself sounds excellent and well textured. The jagged response above 6kHz makes the treble a bit ‘coarse’. Still, raw statistics never tell the whole story. AKG Black K361-BT 1/8" (3.5 mm) TRS Connector Circumaural Over-ear, Closed-back, Foldable Studio Headphones with Bluetooth. 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