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Old 9th January 2009, 04:13 AM   #1
This speaker DIY thing, it's pretty addicting!
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Default New BIBs and a tube amp Q??

I "finished" my first set of BIBs tonight. Well, finished enough to listen to them. I must say, I'm impressed. Even my wife was impressed. I used an old set of MCM 55-1870 5" aluminum drivers I've had for a few years. They needed a little on the higher freq side, so I added some Zenith horn tweeters I salvaged from an old console. I need to finish making them "airtight" and mount a bottom plate on them. After that, it's just cosmetics. I'm running them off an old RS STA-100 for now.
Thanks Zilla for your BIB calculator.

A question about an old Packard Bell tube amp: it has a transformer for each channel that the original speakers were connected to. If I don't use the speakers that were originally with the amp, do I need to run the newer speakers (my new BIBs) from the transformers?

Jolida SJ502A, Squeezebox Touch, Paul Carmody's Sunflowers, Jeff Bagby's Continuums; Planet 10 HiFi's MarkAudio A 7.3 Frugalhorns and MarkAudio CHP-70s, Bjorn's PS95 TABAQs
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Old 9th January 2009, 07:12 AM   #2
tentoes is offline tentoes  Canada
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If I don't use the speakers that were originally with the amp, do I need to run the newer speakers (my new BIBs) from the transformers?
You must connect the speakers to the output transformers on the tube amp. I gather this is an old console tube amp. Do you know the impedance of the old speakers?

It may not be wise to connect speakers with a lower impedance. Some output transformers do have taps for 4, 8 and 16 ohm speakers.

Good luck and use caution. Those old tube amps have 300-400V inside them and they can bite!

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Old 10th January 2009, 03:19 AM   #3
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Neat! Maybe put the tweeters on the rear... works for me!

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