The below is a video of a 320Kbps MP3 of Jim Keltner's Improvisation from an Usher test disk.
Underneath it is a link to the same track recorded using a Rowland Edirol you see in the video by the sound pressure meter.
Make no mistake this test track is really hissy with additional LF noise from somewhere - no noise reduction on analogue tape from a long time ago. However, the recording has plenty of slam, which makes it an impressive listen.
If you follow the link you can download the 44.1KHz uncompressed .wav recording, which is better quality than the camera mic, obviously. Compare the two for fun, but you'd have to be pretty mad to bother doing it, I accept that. Play loud, though, if you do. The .WAV download contains the bass the camera mic misses along with other improvements in quality, I think.
The problem is when played back on my dynamic Mark & Daniels, they can't convey the sheer speed of the Apogees. However, I think all will agree you can tell the speakers aren't slow (and have real balls), LOL.
Just a bit of fun don't take it too seriously. Feel free to say it sounds bad, but I can tell you in room it is astonishing. This on properly tricked out restored Full Range must be astonishing+++.
We're getting 96 odd DB from nominally 80 Watt tube amps here, with a bit of headroom to spare yet, from an Apogee. Take note of that - the Duetta never was really hard to drive.
Note my Lampizator is away being fixed/modified, and I am simply using a £100 Chinese DAC, a Xiang Sheng DAC-01A, with a Western Electric 396A in it. Amazingly good for the money.
Make sure you play back at at least 720P.
The track is a pretty well known hi-fi show track.
The Rowland Edirol .WAV version download.