I have a pair of RCA MI-9449 15.5" 30 ohm theater speakers which I intend to recone and install in a bass cab. My question is how do I match impedance to a Gallien Krueger 400RB amp?
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Question about RCA theater speakers.
- Thread starter classadriver
- Start date
Antique PA speakers probably won't work well for bass. Those are designed for a horn cabinet. They might be valuable, so I'd put them on Ebay and put the proceeds towards buying some proper bass speakers. Right now someone else is selling a pair (not in the best condition) and they think they can get $1,000 for them.
Here's a link: http://cgi.ebay.com/RCA-MI9449-MI-9...trkparms=65:12|66:2|39:1|72:1240|293:1|294:50
Here's a link: http://cgi.ebay.com/RCA-MI9449-MI-9...trkparms=65:12|66:2|39:1|72:1240|293:1|294:50
As an eBay Associate, TalkBass may earn a commission from qualifying purchases.
billfitzmaurice
Commercial User
- Sep 15, 2004
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Unless loaded in horns as they were intended they won't work very well. Does your cab look like this?
You have them reconed with an 8 ohm coil.
Yes, the cabs they were out of look exactly like that. I've heard they have very low frequency response.
Far better to sell them to a crazed audiophile for big bux. Buy new speakers designed for electric bass. Take the money left over and buy another bass. Or two!
Here, one sold for $400: http://cgi.ebay.com/ws/eBayISAPI.dl...01&ih=008&category=50597&ssPageName=WDVW&rd=1
If you have the cab I'd see if anyone wants that, or the other components.
If you have the cab I'd see if anyone wants that, or the other components.
As an eBay Associate, TalkBass may earn a commission from qualifying purchases.
billfitzmaurice
Commercial User
- Sep 15, 2004
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- Owner, Bill Fitzmaurice Loudspeaker Design
The response is from the cab, not the driver. Put that driver in a typical electric bass cab and they won't do squat below 100 Hz.
The RCA cab is likely down only 3dB at 40 Hz. Your typical ported 410 or 115 is down at least 10dB at 40 Hz. But a tad more portable.
dhomer
Commercial User
- Apr 9, 2009
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- Owner, Gigmaster Soundworks, Auth. greenboy designs builder, MI
My how has the technology changed.. 80 watts power handling and 455 pounds?! And no usable response over 8.5K?? And we complain about full range bass cabs that can handle 500+watts and weigh over 60... geez...
At the radio museum in minneapolis there was a conical horn cab from the Minneapolis Orpheum Theater from 1929 or so. The unit hung from the center of the ceiling. IMMSMC it was about 6' across square and flat a couple feet thick.
It was only a MONO system, as it was put in for TALKIES and amplifying stage productions.
They had it sitting on a big table.
It was very low power, but kicked like a mule on a very low powered amp they had on it. It also sounded phenominal with a driver that looked like a modern day tweeter like a big ALTEC unit stuck on the end.
I was just out at the museum's website the other night looking for photos of this thing to show you guys but no cigar. It was the first place where I played a Theremin though they have an original RCA.
BOB
It was only a MONO system, as it was put in for TALKIES and amplifying stage productions.
They had it sitting on a big table.
It was very low power, but kicked like a mule on a very low powered amp they had on it. It also sounded phenominal with a driver that looked like a modern day tweeter like a big ALTEC unit stuck on the end.
I was just out at the museum's website the other night looking for photos of this thing to show you guys but no cigar. It was the first place where I played a Theremin though they have an original RCA.
BOB
