Power requirement for ADS L-1290?


Here's my weird question of the day:

I got a set of hand-me-down ADS L-1290s...(I know, I know, quite a nice gift. It's true. I'm very fortunate).

Everyone says they love power, saying things like 'the more power you give them, the more they sing,' and other nice but imprecise stuff like that.

They're rated at 300 watts maximum, and they're not terribly efficient; coming in at 90db at 8 ohms. Exactly how big does my amp need to be to get "decent enough" sound out of them? I fully realize that the very notion of "decent enough" is anathema around here, but I'm not wealthy, by any means, and look to the vintage audio market for my stuff.

Would 65 wpc be enough to get them to sound good enough? 80 wpc? 100?
jamesjems
Br56's experience matches mine. The L1290s may have tested at 90dB in-room at 1w input (there's about a 3dB boost from room reflections on average), but these sealed-box speakers can use all the power, current, and damping factor you can come up with. I had the L-1090s as I mentioned 11 mos. ago in this thread. Going from a 60/90 wpc (relatively) high current receiver to a true 55-lb. high current 200 wpc power amp was like, "Whoa! No way is this amp leaving the house!" It seemed to add 1/2 octave of bass extension, plus increased clarity, speed, and dynamics, plus a more liquid sounding presentation. It wasn't just powerful, it was simply better in every way--natural-sounding mids and highs like a tube amp while maintaining that SS-style tight grip on the bottom end.

Anyway, it doesn't surprise me that 500wpc would open such a speaker up even more.
I've owned a pair of L-1090/1 speakers since new and have always enjoyed them. I picked up a pair of L1290/2 speakers recently and have been enjoying the extended bass of the larger LF drivers. Similar sound to the L1090s but much fuller sounding. They do seem to like my rebuilt Yamaha M-2 amp at 200+ WPC.
Now after all the raves about the 1290's, try out the 1590'2's. Now there's an awesome speaker! I own them both and will never part with them. Even better, the 1530's, although huge in size comparison, put out the best sound of any of them. I only sold mine as I am retired now and had to downsize for a smaller home. ADS was great in their day, and still are!
Nice speaker! With mine I've used 1) a 25 watt HK430 receiver; 2) a 100 watt Outlaw RR2150 receiver; and 3) a 100 watt pure class A, high current boutique amp. They sounded 1) ok; 2) really good; 3)damned near great, respectively. Bottom line: the more power and higher quality you feed them, the better they'll sound.
I am considering a pair...would a single NAD 2600 (recently recapped etc, rated at 150 per channel) be able to reproduce the bass response folks are describing? How would it handle the low impedance characteristics? or would my efforts tracking down a second 2600 ( 2700, 2400) and set 'em up mono for each channel be worth while? based on the thread, it certainly sounds like More Is Better!

Thanks for the feedback.