Avantgarde Trios too loud with my amps

I rarely recommend what I personally use, but the Lamm SET amps are very synergistic with the Avantgardes and will allow you to hear why both products are highly regarded.
You should probably get some help from some one who knows the speaker in setting them up properly. I've had the Duo for six years, and there are significant differences with small changes in set-up, wiring, and adjustment of crossover to woofers. They can deliver life-like sound, sound lackluster or make you run away screaming, depending on small changes in set-up.

What Whart said - the Lamm SETs are a match made in heaven with Avantgardes. OP also might consider a preamp (like Cary SLP-05) with L&R gain controls, plus a master volume control.

The speakers are worth the effort!

It's not the amount of power, it's the gain structure of your system when listening to your digital source. Contact BAT about lowering the preamp's gain. Alternatively, SMC makes a device that reduces system gain by 12dB that works in either balanced or single ended systems. You could insert it before your preamp.

Onhwy61,
I agree that system gain reduction is certainly a viable choice(especially if he wants to keep the BAT components).

If he`s interested in exploring a 'different'type' of sound and musical perspective with lower power SET amps,he has the ideal speaker to take advantage of their special qualities.These speakers provide significant flexibility.
Regards,

Ohhwy61,
Come on man, those were my words! I wanted to say it first- not fair.
Of course, the power of your amps has nothing to do with the loudness, it is a gain structure of both- preamp and power amp.
I have Avantgarde speakers, and know exactly, what you mean.
I was also told, that it's better to have lower gain in the preamp, than in the power amp.
Attenuators are an option, but will come with some, maybe negligible, degradation of signal.
But, a reduction of your system gain will afford you immense benefits- much lower level of background noise, more precise volume control, etc.
Please, do yourself a favor and contact Victor Khomenko of BAT, maybe they will be able to reduce gain in your preamp- you will benefit also from having less connections in the system (b/w attenuator and amp/preamp)
As a matter of fact, Victor has Avantgarde Trio and (surprise, surprise) BAT electronics in his personal system, so he should know how to help you
Cheers