External crossover for Calipers?

[robertone]

Hi,
haven't been on here for awhile. Was once in the process of repainting my Calipers a while back,but had to be put on hold due to family illness.
Anyway have started back up and taken covers off etc,had a look at ribbons and with some experimenting have gotten one of the speakers to almost not buzz at all(at high volumes)..
What Im thinking off is can I add some external crossover so the ribbons don't see anything under 45hz?
I have 2 Classe DR-9's driving them with a Classe DR-4 pre-amp. What would be the easiest way to go about doing this,know that I have to get a sub to take over the low's.
Also with the 2 claps for the top and bottom of the ribbons,can they be removed without effecting the tension on the ribbon?

George

[apogee_admin]

Some subs have a high pass circuit built in to do this, I have seen the feature on B&W for sure.

You can perform the roll-off at line level with a capacitor but I don't think it would be steep enough, plus calculating the value can be tricky as it depends on the specifics of the input circuitry of the amp.

[artm]

If you're planning on using a subwoofer then your best option is to get one with its own low pass filter.

If you want more flexibility, look on ebay for a dbx crossover, model 234 or 223 or such; they're cheap. These are line level, between your preamp and amp. You can use it without a sub to do just the cutoff. Adding a sub later is no problem.

[robertone]

Thanks for replies. Have taken covers off speakers and starting to sand them down. Will start looking around for a sub.