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Q & A / Re: Sunn Sceptre Cabinet Driver question. Which drivers are original?
« Last post by Whipsaw on November 14, 2017, 11:53:20 am »
Thanks Granny....Do you have any idea what the silver ones are?  I have seen eminence speakers that look similar but the basket is a little different. The are no markings or writing on my speakers. Bob
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Q & A / Re: Sunn Sceptre Cabinet Driver question. Which drivers are original?
« Last post by GrannyGremlin on November 14, 2017, 11:30:40 am »
The 3 similar ones are alnico magnet and therefore older than the black ceramic one.  If you have any idea regarding the year of the cab you could figure out which model is original to the cab (mid-late 70s would be the black one, before that the silver ones)... however it is not inconceivable that  they are all original if the cab is from the changeover period.

Personally I'd leave it as is - they don't have to match.  If you insist on them matching I'd get another silver one (I prefer them - bugger what was actually original, though odds are those were the original ones due to 3 vs 1 of the other).
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Q & A / Sunn Sceptre Cabinet Driver question. Which drivers are original?
« Last post by Whipsaw on November 14, 2017, 10:28:57 am »
I aquired a Sunn Sceptre cabinet with two types of drivers.......3 Sunn branded drivers, no numbers or codes on them with dust caps, and one Sunn branded Jensen C12N 220901 indicating it was made in Jan of 1969 with no dust cap. Which speakers should be in this cabinet or are original? The 1970 Sunn catalogue says the Sceptre cabinet came with JBL D-123Fs. The 3 unmarked speakers don't look like 123Fs so what could they be or where I can get one? Should I look for 3 more C12N's, or one speaker to match the three unmarked ones that are in there? Thanks Bob Sigmo68@yahoo.com
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Classified / Need an 8 ohm speaker for a Sunn Sceptre 412 cabinet.
« Last post by Whipsaw on November 12, 2017, 03:24:55 pm »
Hello, Would anyone have or know where I can get a Sunn 8 ohm 12" speaker for what I think is a late 60's or early 70's Sunn Sceptre 412 cabinet? My email is Sigmo68@yahoo.com. Thanks, Bob
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Q & A / Re: 70s (vibrato/Reverb) footswitch wiring
« Last post by GrannyGremlin on November 05, 2017, 09:50:57 am »
Cool; thanks for the confirm.
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Q & A / Re: 70s (vibrato/Reverb) footswitch wiring
« Last post by Isaac on November 05, 2017, 09:06:46 am »
I used a Peavey foot switch with my Sentura II for several years. It has a TRS plug. I used a Radio Shack stereo jack to dual RCA plugs to mate it with the amp, so I don't think you'll have any problems.
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Q & A / Re: 1968 Sunn Sceptre reverb troubleshoot
« Last post by GrannyGremlin on November 04, 2017, 10:43:31 am »
Both of my vintage Sunns came to me with the reverb not working (1200s and a Solarus 6550 version).  In both cases the fix was to clean the reverb jacks and plugs at both ends; probably never been cleaned and they're old and grimey.  Surprised me that it was something so simple, but like I said, same fix on both amps.
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Q & A / 70s (vibrato/Reverb) footswitch wiring
« Last post by GrannyGremlin on November 03, 2017, 09:46:56 am »
So I found an old Sunn footswitch, period correct for my 1200s and Solarus amps, but someone has previously used it as a chassis donor for some other type of device (there was a large cap and a relay in there when I got it; lots of leads not connected to anything at 1 end).  I want to wire it up and put it to use.

My question: Are the ground (sleeve) wires for both RCA jacks common (or can they be without causing issues)?  Specifically, I was hoping to be able to use balanced mic/line cable (2 conductor coax w shield) from switch to amp vs dual monoconductor coax cable (i.e. hifi interconnect  or 2 x guitar cable) which would be bulkier.  Any reason I shouldn't do this?

Since this is pretty much chassis only, I was going to put a TRS jack at the switch end and have a detachable 1/4" TRS to dual RCA cable as the interconnect.  Also considering adding indicator LEDs for both FX (since all the stomp switches I have are at least 2 pole anyway), but maybe that's not worthwhile.  If i do it would be battery only (it would last forever just powering 2 LEDs and be cleaner than running a power cable to it).
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Q & A / Concert Controller 2 - Loud Pop When Shutting Off
« Last post by Jeff Troy on October 27, 2017, 04:12:46 pm »
Hi, Guys,
I'm pretty decent with cosmetics, but I don't do electronics and my repair guy is gone.
I use a Concert Controller 2 (6-CH) for rehearsal with a swing bad - only two vocals and we don't mic anything else - but when I turn off the unit, it makes a horrendously loud pop.

I'm only running a pair of sunn floor monitor speakers in the rehearsal room, but the last time I switched off, it did some damage. I didn't know that anything was wrong until the next time I turned it on, and then it was pretty clear that the the mixer has a problem. The horns in the monitors seem to respond, but the speakers do not. Pretty sure the pop in the controller blew them out.

I plugged in a 412SR cab and a Concert Horn Accessory. They all work fine. I went back to the monitors and still no speaker response. All the hookup cables are good, and it's unlikely that the speaker wiring inside both monitors would go south at the same time.

Anybody know what this is, and how to fix it? Someone mentioned something about a capacitor on the on/off switch, but he never followed up. Please help if you can.

Please respond to  jefftroy@aol.com  I don't get on this site so often anymore.

Thanks and regards...
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Classified / Coliseum 300 with two 215SH cabs
« Last post by claytoy on October 25, 2017, 08:03:17 am »
In Costa Mesa CA 92626 - speakers stock sq mag recently re coned -- check out pics. 1000$   Clay 714 380 2417
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