I got into a discussion with someone about 701's vs 880 and was talking about how much forward the 701's bass is in comparison. Long story short they disagreed so I went and pulled the frequency graphs and sure enough my observations were true, but only comparing 250ohm 880 (what I own) to Q701. The original K701 had a more anemic bass response which would have put it on equal footing with the 880 but then I added the 600 ohm 880 into the equation and I was shocked to see it's frequency response was very different from the 250's. It had about 4db more bass along the same curve from 150 down to 20hz.
I know a fair bit about electrical engineering and audio engineering so I already knew that the higher the impedance on a driver the more accurately it tends to reproduce sound, with the low impedance drivers tending to be a little more sloppy in their response curves but that doesn't change a whole lot from 250 to 600, not as much as from 32 to 250 anyway. But I never thought about the sound signature or if I did I assumed it was minimal.
So how do the 600's stack up to the 250's? I really like the 250's but my only slight dislike is the underemphasised bass which always leaves me wishing for a little more. Especially on gypsy jazz and jazz standards where the double bass just sounds put off in the corner.
Worth it to buy a 2nd pair of 880's for better bass?