No matter how hard I try...

[nadams]

I have never seen the distortion lights even flicker on my GFA-545. makes me wonder if I'd ever need anything bigger. Running the SDA 2's, even with power-sucking music like Prodigy - Fat of the Land. The entire house shakes... still no lights. Maybe the LEDs are shot? No audible distortion, of course... it just feels like I should be reaching the limits of this amp, yet it keeps doling it out in spades, whatever the hell that means.

[zarrdoss]

Adcom, built like a tank!

[nadams]

Found that with my old GFA-535, as well... Yet I'm still glad I decided to upgrade to a 545. It made a huge difference even though I never clipped the 535. I still wonder if dual mono's is in my future :p

[appadv]

I had a 535 and it never clipped.

[fbm211]

Ive never seen mine light up.But I know they work because they lit up last year before I sent them out to be repaired.

[dorokusai]

I've clipped a pair of 565 monoblocks on a pair of Soundlab A1....not that it matters much.

Adcom is a really robust brand with a solid and reliable build quality.

[danger boy]

be glad that you have never clipped your Adcom. it's cool to see the lights come on.. but when they do.. it's never a good thing. my Adcom is the same way... never seen the lights flicker.

[bassfann]

that amp is incredible.dont worry about clipping it

[reeltrouble1]

As you have found Adcom is plenty of amp power for your Polk's, they are easy to drive with a reasonable impedance curve.

RT1

[heiney9]

FWIW, I never clipped my 545 with the 1C's either. The thing with SDA's is that they are effecient and their impedance curve doesn't dip particullarly low(not too much below 4 ohms)............but they are harder on the (negative) side of the amplifier because of the dimesional array. So a robust amp is needed and the Adcom's seem to fill that bill.

This extra taxing on the negative side of the amplifier is why many if not all HT receivers shut down when pushed driving SDA's. This is of course part of the reason why you need to use common ground amps.

I've often wondered if using the AI-1 isolation transformer would take some of the burden off the negative side of the amp and perhaps make them slightly easier to drive for lesser amps.

H9

[Ricardo]

You are not playing it loud enough. My 555 performed light shows with the 1.2 tL's.