Best speaker brands for transient response

I’ve heard or owned many of the aforementioned speakers and most of them don’t remotely match the Borresen X series for what you seek, be it treble, midrange, or bass. They are the closest to “perfection” I’ve encountered from any somewhat affordable speaker line. 

And don’t be put off by the “4.5 inch” woofers. Any other manufacturer would refer to them as a 6” woofer. At the very least they are as large as any other manufacturer’s “5.5 inch” woofers.

What is a transient response? I have not heard of that term before.

It’s really just a synonym for low distortion. The reason people conflate these notions is that many speakers are equipped with low distortion midrange or treble drivers, but nearly all <$10K dealer-sold speakers produce high distortion in the bass freqs. At best this can cause a speaker to sound somewhat “muddy” or “slow.” At worst, it has “slow” sounding bass coupled with a “fast” sounding tweeter, which then results in a perceived lack of coherency.

Transients are impulse responses in relation to steady state and it can be measured. Impulse response is to a specific input from base level. It is used to check time alinement. It is not related to distortion but most systems with good transient response are also low distortion. It comes down to good power to weight ratio of the drivers with pistonic motion.

When it comes to transducers, “transient response” is how close a driver can mimic the original signal. If given a theoretically perfect amplifier and speaker enclosure, any deviation from perfect transient response is indeed driver distortion. The more imperfect the response, the higher the distortion.

You are correct that lower mass diaphragms tend to have lower distortion, especially if they can resist bending modes within their implemented bandwidth.

Sometimes a driver can have good piston behavior but still cause a comb-filtering effect, which is another, typically less subjectively offensive distortion. Regardless, any deviation from perfection is a distortion.

The reason higher quality drivers sound quicker, subjectively, is because they are lower in distortion.

Ported, sealed, OB, panel…all such designs can sound slow/fast or dynamic/anemic depending on how well they are designed and the quality of their transducers. Unfortunately, most dealer-sold tower speakers under ≈$7K/pair (and stand-mounts under ≈$4K/pair) employ very mediocre transducers.

 

The best transient response I've ever heard, are ion plasma tweeters. 

It's hard to beat drivers with zero mass.

Lansche and AvantGarde Acoustics both have very impressive transient response behavior. 

Next in line would probably be ribbons and electrostatic.

Diaphragm mass does have a strong correlation to treble quality and perceived “transient response” IME, even among tweeters made of the same material from the same manufacturer.

The Spendor D7.2 are still very much in the running but they lack outrigger feet, and with two dogs and a cat that’s actually an important consideration. I do realize I can buy outriggers for them.

I am a longtime Spendor fan, but they have largely been employing the same drive unit technology for the last 10 years. They use what is essentially a $50 Seas Prestige tweeter in all their current speakers (the D series merely having a phase screen in front of the diaphragm). The original D7s were probably close to benchmark status for that price range 10 years ago, but other companies have since leap-frogged them considerably.

To my ears they don’t come very close to producing the perceived transients and tactility of many others currently around the $7K—$10K price range, not in the mids, treble, or bass.

I encourage you audition them for yourself because that is always the best approach, but buying them “blind” (or deaf rather) would be a mistake IMHO considering the other options now available on the market.

 

And I assure you, a Magnepan, either a .7 or a 1.7 or ANY Magnepan (and these models are far under $10k) don’t have an iota of distortion in the bass.

I’ve owned both the 1.7is and .7s. 

I’ve also auditioned the 3 and 20 series Maggies. They have better bass than most pistonic-cone speakers, especially when driven with high power, massive current reserve amps. That said, I’ve encountered quite a few speakers that I feel have better controlled bass with more realistic definition—less distortion I would say. For example, Børresen X series and Philharmonic BMR Towers both have considerably better defined bass than did my recently departed .7s. Those speakers are 5X and 2.5X the price of the .7s respectively, so it’s not terribly surprising that they’d have better bass.

Some other aforementioned speakers also have subjectively faster bass than the Maggies, though nothing I’ve heard under $15K/pair begins to match the Børresens.