Anything as " fast" as SPECTRAL gear?

Give it a shot! By the way, it doesn't mean you will get your order within 5 minutes, it is just the way they map out their delivery to make sure you do get it within a very reasonable time. The only way I know this is 2 of my sons work for them in management and training. FWIW

JJ's doesn't have any locations in my area. But before playing a recording that might call for a sub (which doesn't happen too frequently with my speakers), I can always drive over to a Subway location if need be. :-)

Best regards,
-- Al

I note, btw, that the ARC Ref 150 has a specified 3 db bandwidth of 120 kHz (at 1 watt, with an 80 kHz "power bandwidth" also being specified), and JA's measurements indicate a bandwidth of approximately 100 kHz (for an 8 ohm load connected to the 8 ohm tap), with excellent reproduction of a 10 kHz square wave (under small signal conditions, as noted under the graph).

Hi Almarg, thanks for the feedback.
I did also note the very same specs as you wrote above & also noted that these were mostly under small-signal conditions while slew-rate is a large-signal parameter (as you already noted in an earlier post). When the amp is outputting a lot more power then i believe that the distortion will be much higher & the various BWs cited in JA's measurements will constrict & that 10KHz sq wave won't look so pretty anymore . That's why a 66KHz BW at max rated power under the stated 13V/us slew rate did not seem unreasonable to me. The effect of the excess phase shift would thus be more discernible (vs. lower power outputs).

I think Quiznos makes a much better sub - too bad that they didn't have their biz model under control. In my area, they have all but disappeared....

Soulution advertises 'fast' amps. My understanding is that this enables them to use large amounts of negative feedback in order to achieve low distortion. Because they are 'ultrafast' negative feedback loops, they do not degrade the sound. So says Jonathan Valin as he currently sings their praises in The Absolute Sound.