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In the Forum: Melquiades Amplifier
In the Thread: Planning my DSET

Post Subject: All about bassPosted by anthony on: 12/21/2015

Hi Romy,

So it is time to think about the bass output transformer in my DSET. My bass channel will be 8 x 25W/8565-00 each side set in a sealed box and will cover the frequency range below say 100Hz. These drivers can be wired anywhere between 1R and 64R which gives quite a bit of flexibility for adjusting the amplifier/speaker system damping factor. Reading your threads about your Scanspeak arrays it is evident that the system damping factor is important for the bass channel and is influenced by the OPT decisions, how the 6C33C is loaded and most likely by how the speaker is wired.

I propose to wire the drivers in parallel so that they present a nominal load of 1R to the amplifier which in effect will maximise the system damping of the drivers, which from what I take from your writings could be a good thing. Then I will have a bass OPT wound with a secondary of 1R or 1.1R that will pass 450mA and cover say 5Hz - 800Hz before rolling off.

Romy, given your experience with the amplifier and the drivers, are you able to offer any advice regarding the OPT or wiring of the drivers before I give the transformer winder my final specs?

Regards,

Anthony

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