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
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