I have two pairs of headphones:-
Trio KH-32
These Trio's date from the late 70's and were originally purchased by my friend Dave, I recall him listening to many different headphones in his price range at the time until he found these, which he considered natural sounding across the frequencies, and with good bass reproduction, I think they were about £45 at the time. They were not that cheap really, in todays money that would be just over £200. I brought them from him about 10 years later when he upgraded, and use them on and off over the past 30 years. They are very good with lots of detail and a good sound stage.
I have replaced the circular foam behind each speaker cover which your ears rest on as this had broken down over the years, apart from that they are original and in surprisingly good condition.
Transducers: Dynamic employing 25 micron mylar film elements
Sensitivity 106dB for 1mW input
Frequency 20-20Khz
Impedance 4-16ohm
Weight 290gm
There is a pair on ebay at the moment for about £35, so if you want a good sounding headphones on a budget they might be worth a punt.
KLH Ultima One's
Sensitivity (SPL at 1kHz for 1Vrms input) 109.4dB
Impedance modulus min/max (20Hz-20kHz) 33.8ohm @ 1.0kHz, 38.7ohm @ 39Hz
Capsule matching (40Hz-10kHz) ±12.6dB
LF extension (–6dB ref. 200Hz) <20Hz
Distortion 100Hz/1kHz (for 90dB SPL) 0.4% / <0.1%
Weight (headset only) 349g
Price £299
I purchased these last year as I wanted to improve my headphone listening experience without shelling out a fortune. The KLH's have had a number of reviews in the press and are generally favourable. The bass is prominent, but it doesn’t get as boomy as some headphones can. From the mids through the lower treble, the response sounds fairly flat, and there seems to be a little extra emphasis in the mid-treble, which makes instruments such as cymbals zing a little more. Probably a good thing for me as my top end hearing has dropped off a little with age, which is par for the course as one gets older. Overall I find they give a excellent listening experience and are VGFM in my opinion.
I have done some back to back listening with both pairs and did so again this morning listening to Joe Jackson - Night and Day, a classic album with huge dynamics and lovely range of instruments and extremely well recorded. The KLH it has to be said are the better headphones not by miles but they have better detail and colour the presentation less, having said that the Trio's for a 40 year old pair of headphones are very good.