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So your looking for a balanced or bright headphone with good imaging and not real heavy bass. I can name a few here with some description to them
Hifiman Sundara: Neutral bright. Not very bassy and more towards neutral with treble raised. Detailed, relatively smooth, and sparkle on the highs. Open Back. Incredible for it’s price point and one of the best especially in the planar market at that price. Be wary of the quality control issues with the company. You can find this product from $250 - $400.
Beyerdynamic DT 770: hard to tell whether this is a U signature or V signature. Recessed mids. Different impedance models though higher ohms make these sound better. Does well with pad swapping such as brainwavz xl perforated pads or choice leathers and they do make this sound better. Can possibly sound sibilant to some ears as this is pretty bright yet moderately bassy. You can find these from $60-$200
Beyerdynamic DT 880: This is a semi open back headphone that has less bass, lacking body, and quite a bit of brightness while remaining a Neutral-bright headphone. Very detailed, clean, with bright highs this is one of the fantastic all round headphones that a lot of people even on the site here love next to the Hifiman Sundara. 600 ohm variation sounds the best while 250 ohm sounding good too however this headphone is demanding in its 600 ohms and requires an amp around the $200+ range with quite a bit of power behind it to drive to full potential. Price tag $90-$200
Beyerdynamic DT 990: Word of caution, don’t buy this if you have any sensitivity in moderate levels to treble I cannot stress that one enough. The treble on this is on the level of extremely sharp and ethereal. Open back. Very sharp V signature with recessed mids. Can be modded to really dial back that treble. Very beautiful sounding headphone if you can tolerate high amounts of brightness. Can dial back brightness with 4 ply toilet paper placed behind the foam of the driver, dekoni elite velour, certain amp setups, and certain filered cabling. Beyerdynamics have some very nice imaging but this is the widest of the cheaper DT series and has very good imaging and seperation like the other two. Price depending on the ohms you choose will change the treble keep this in mind higher ohms means smoother treble $90-$200
Beyerdynamic 177x GO Massdrop: A step up from the 770s and has a more towards neutral U style signature. Very clean detailed and sounds rather wide. Mids are still recessed but less than the 770. IMO a pretty large step up from the 770. Can be balanced due to the mini-xlr detachable cable. Current Price is $450 however it has been seen to go on sales for less and is worth the money for a great closed back with portability due to it’s low ohm. This in my opinion is actually better than the DT 1770 and is cheaper as well.
Beyerdynamic DT 1990: This is one of those that I revere as one of the kings for the gaming world. Neutral Bright yet with a very nice balance amongst the frequencies. Comes with two pads analytical and balanced. Analytical works with what the headphone is meant for as this headphone picks apart errors in the mix and imaging is spot not as bassy with these pads on and treble is pretty bright. Balanced this is the more fun pad to the headphone bass is increased and the signature becomes more towards a V signature instead of the relatively neutral bright. If the headphone is too bright you can purchase Dekoni Elite Velour to dial the treble peak frequency in line with the bass frequencys which should fix any issue with the brightness you have. Price range differs drastically and also changes based on country. Price Range $300 - $650.
Sennheiser HD 598, 599, 58x Jubilee, and 6xx: Depending on the one you get will depend on the sound here. 6xx has the smallest soundstage to my experience however sounds the best with the most detail and clarity of the bunch gorgeously balanced headphone however 58x is the happy medium between these with a moderate soundstage with still a lot of detail and clarity. 598 and 599 despite being discontinued have the widest soundstage but in comparison aren’t as clean or detailed to my hearing. Price tag $100-$400
Philips SHP9500: next to its alternative x2 hr fidelios this has less bass and more brightness. More towards a Neutral bright. Wide, smooth, with sparkle in the highs and enough bass present in the mix that it’s not too much. Budget option but sounds great without the bloated bass and is a favorite of mine. Responds well to pad swaps. Price tag $50-$100