Help! My system is very bright it hurts my ear

Fatgosil, I’m not sure if you are realizing that a passive biamp arrangement, which is what you appear to be describing, will not provide proper tonal balance unless the gains of the two amplifiers are equal or close to it, or if differences in their gains are somehow compensated for externally to the amps.

I couldn’t find a gain spec on the SE-40, and in the absence of a spec there is no reason to assume it is similar to the gain of the 8008.

I realize that you have tried using at least one of the amps by itself and still perceived brightness, but it is very conceivable that multiple factors are contributing to the problem, including gain differences between the amps. So as Lowrider and others have suggested I would do any further troubleshooting using just one of the amps running full range. And try each of them if you already haven’t, and use whichever sounds less bright. Which one will sound less bright depends in part on the relation between the output impedance of the amp and how the impedance of the speaker varies over the frequency range, and I can’t say which amp that would point to because I couldn’t find an impedance curve for the speaker.

Also, to be sure that something simple isn’t being overlooked, have you removed the jumpers from the speaker terminals when you have been using the two amps?

Regards,
-- Al

Al, the Input Sensitivity of the Macintosh c40 preamp is 250mV (at the time of 2.5V Output power) (50mV IHF).
Input impedance is 22kohm. Interconnects are unknown.
How does this match with a CDP having an Output of 2.2 Volts?

Thanks for pointing that out, Lowrider. Its significance, though, is just that the OP is probably having to use the volume control at fairly low settings within its range (at least with the Aragon amp, when used singly), but at settings that I suspect are not unreasonably low.

The 250mv and 2.5v numbers mean that with the volume control at max the preamp’s output will be 10x greater than its input, which is a gain of 20 db. That is significantly more gain than is generally ideal for use with most digital sources, but given the average sensitivity of the Aragon amp (1.68 volts input for full power), and its 200W rating into 8 ohms, and the medium sensitivity of the speakers (89 db, 6 ohm impedance), and the fact that the system is described as being in a living room with a 20 foot ceiling (meaning that the room is probably fairly large), would seem likely to be within reason. As I indicated earlier, though, I couldn’t find specs on the SE-40 amp.

Best regards,
-- Al