New Scumback Speakers Demo by Pete Thorn 12/20/11

[Scumback Speakers]

A demo of the following Scumback Speakers:
Blackback M75 HP
Blackback H75 HP
Paper Voice Coil M75
Paper Voice Coil H75
M75 HP

Hey everyone...Pete Thorn has just completed the newest Scumback Speakers demo video featuring the California built (black frame) Scumbacks.

He demonstrates the new BlackBack M75 & H75 models (BM75 and BH75), the new Paper Voice Coil M75 & H75's (M75-PVC & H75-PVC), and the regular M75 for reference comparison tones. The 1st guitar is a 1961 SG Special with WCR Guitar P90 pickups.

http://www.youtube.com/watch?v=u6U30BV2 ... ature=plcp" onclick="window.open(this.href);return false;

A youtube member has posted the following for getting to the different speakers quickly.

1:47 -Blackback M75 HP (Med Gain) 2:10 -Blackback H75 HP (Med Gain) 2:34 -M75 Paper Voice Coil (Med Gain) 2:58 -H75 Paper Voice Coil (Med Gain) 3:23 -M75 HP (Med Gain) 4:06 -Blackback M75 HP (Cln) 4:30 -Blackback H75 HP (Cln) 4:53 -M75 Paper Voice Coil (Cln) 5:16 -H75 Paper Voice Coil (Cln) 5:41 -M75 HP (Cln) 6:20 -Blackback M75 HP (Hvy Rock) 6:42 -Blackback H75 HP (Hvy Rock) 7:03 -M75 Paper Voice Coil (Hvy Rock) 7:25 -H75 Paper Voice Coil (Hvy Rock) 7:46 - M75 HP (Hvy Rock)

Enjoy!

[Roe]

the PVCs sound great, esp. for clean and medium gain. the blackbacks sound a little stiffer and cleaner and seem to work on gainier stuff

[1982hitman]

Love how PVC's sound, Pete is the man for testing stuff. Unfortunately their wattage is too low - if only they were at least 50 watt each. (Don't worry, I got 4x12 with Scumbacks already) My question is which of high powered M75's is closer to PVC M75 - blackbacks or pre-rola?

[Scumback Speakers]

It's a tossup on that one, sir but IMO the BlackBacks would be closer, but they'll be more aggressive sounding than the PVC's, too. The M75's are more laid back, with the PVC's in between. But you probably already figured that out from the clips.

[Strat78]

Pete's clips are great Jim. Nice work being done here. Are recones still $90?

[NY Chief]

After witnessing all four flavors on Jim's new 4 way speaker junction box we both agreed....we all need FOUR cabs with a quad of each. They're all THAT good. Listening to each cab alone at the click of a switch while Jim banged through Cheap Trick's California Man on an Orville God Top really shows the nuances quite well. I really want to play all four plugged in at once. I would call it the spumoni tone! And that purple 50 watter is just an animal!

[Scumback Speakers]

Pete's clips are great Jim. Nice work being done here. Are recones still $90?

Recones are going up to $119 each plus shipping. There have been so many effed up frames sent to us to be rebuilt, it's not funny. Bent in shipping/shifted magnets, etc, that we were taking them apart, then finding out they had other issues that needed addressing to be rebuilt. It wound up being a bigger PITA than I thought.

But if you have a speaker with no bent frames/shifted magnets, etc, those are still $99 plus shipping. But that's going to end after NAMM, so you've got four weeks to send them in at the old price of $99.

EDIT: Hell, I just noticed my web guy put the new price in that goes into effect on 1/23/12. I'm having him fix it.

Sorry.

[shakti]

Cool clips, Jim! I would have loved to hear the M75-PVC next to an original 20-watter for comparison purposes, but I can tell they have a very cool sound compared to the regular M75s.

I will be placing my order in not very long, but still need a shipping quote for eight speakers. I also need to decide on H75-PVCs or H55-PVCs for the tall bottom cab. Any tips from any of you guys on which ones to go for to nail this tone? Amp will be JTM100 Black Flag:
http://www.youtube.com/watch?v=T6X0BcA1efk" onclick="window.open(this.href);return false;

[Ted B]

Any tips from any of you guys on which ones to go for to nail this tone? Amp will be JTM100 Black Flag:
http://www.youtube.com/watch?v=T6X0BcA1efk" onclick="window.open(this.href);return false;

That track was recorded on Nov 10, 1967 for the Dutch TV show Hoepla. There seems to be little photography from the session, but Hendrix appears to be playing a tall 'B' cab on its side. I can't be absolutely certain, but it looks to me like there is a "100" logo in the corner.

The H55-PVC or M75-PVC are the prime candidates. At that time, the H55-PVC would have been used in the new (at that time) "100" cabs. If you're looking for speakers for two cabs, having one each fitted with M75 and H55 would provide some versatility.

[shakti]

Yes, I agree that H magnet speakers are the ones. I will use the M75-PVCs in the slant cab, and some H magnet PVC speakers in the bottom one. The question is - H55 or H75?

Original "100" logo pinstripe cabs are stupidly rare, so I'm not convinced one way or the other if those '66-67 Marshall cabs with H magnet speakers were typically 55Hz or 75Hz. The later ones ('68 and on) with the newer (non-paper-former) voice coils and higher power ratings (G12H30) seem to have used 55Hz exclusively though.

Jim - do you have any info about this? Those rare '66-67 H magnet speakers...with the ones you've come across, which cones did they typically have? H1777 or the SP444 (IIIRC) bass cone? Or had they moved to the 102 003 and 102 014 cones? And which ones of those have you seen most often?

[Ted B]

Jeff West and I discussed this subject just recently. Neither of us know of an instance where a 75Hz G12H was used for Marshall 4X12 cabs from this period. Those with date codes from this time are T1281s. The 75Hz versions don't seem to appear until later.

As for the cone kits, Marshall used both the Mueller and Pulsonic parts during this time, although I believe the SP444 turns up more often.

The only lingering question I have at this point is specifically when Celestion abandoned the paper coil forms. Pardon if this question has already been answered elsewhere.

[Roe]

Jeff West and I discussed this subject just recently. Neither of us know of an instance where a 75Hz G12H was used for Marshall 4X12 cabs from this period. Those with date codes from this time are T1281s. The 75Hz versions don't seem to appear until later.

....

yes, but jeff also asks if anyone has "seen any other G12H25 type you believed stock in earliest "100" cabs (like JHE), like maybe T1217s? I ask because the 75c/s G12Hs seem to have appeared earlier than 55c/s versions, lots of T1217s (well, relatively) dated throughout '66 f'rinstance."http://www.vintageamps.com/plexiboard/v ... 4&start=15

[Ted B]

Jeff appears to be asking if anyone, anywhere has seen T1217 fitted to Marshall cabs from this period, because as far as we've known, the answer is 'no'. Jim's comments in his comprehensive greenback writeup appears to concur, but I invite him to offer his own comments.

I'm not saying Celestion didn't make a T1217 until the end of the decade, I'm simply denoting our observations that they don't appear to have been used by Marshall in 4X12 cabs until 1970 or so. As for Marshall's reasoning to use the T1281 for guitar cabs, I do not have the answer.

[Scumback Speakers]

Gents, busy day here, I've been on the phone for the last 2.5 hours....so...

I've seen both T1217 G12H25w H1777 and T1281 G12H 25w SP444 coned speakers. They were pairs or singles, out of the cabs, so I can't tell you what they came out of...sorry. I saw more of the H1777 and SP444, less of the 003/014 cones, but since those came out in 67 that makes sense. According to the HOM, born on dates of May 6, 1966 for the T1217, taking over from the T1134 (November 12th of 64), and the T1281 showed up on October 17, 1966. So you'd tend to believe you'd see more 75 hz models than 55 hz since they came out sooner.

But as we all know, the HOM isn't perfect and Celestion swapped stuff around a lot.

I always heard the tone of G12M's in early Hendrix, G12H30 55hz later after 68. Kraft paper voice coils went down the road after late 67/early 68, although they were fitted with both H1777 and 102 003 cones. Confused yet? So you have to figure there were paper voice coil T1281 with SP444 and 102 014 cones, too.I haven't seen/heard any of the G12H25w 014 cones. The G12H25w SP444 cones I heard were brief, and the owner wouldn't let me look at them for more than a minute, which was 8-9 years ago.

I've got a quad of late 67/early 68 paper voice coil 20w G12M's w/003 cones. They're the tone I went for with my M75-PVC's, I got about 98-99% of the way there, but you can't engineer in 44 years of playing by Brian May of Queen, George Lynch of Dokken, and whoever the "Nazgul" band was (those are the names stenciled on the back of the cab). So the M75-PVC's are not 100% exact, (sorry!) but they're pretty damned close and quite enjoyable, as you can tell from the video Pete Thorn did. I'm digging both my M75 and H75-PVC cabs, just depends what guitar I'm playing, what I'm playing and how much "WOMP" I want that day.

What else did I miss answering in those last 3-4 posts? Sorry I'm hammered with orders today, and the phone has gone nuts...in fact, there it goes again! Sheesh!

[Ted B]

I've seen both T1217 G12H25w H1777 and T1281 G12H 25w SP444 coned speakers. They were pairs or singles, out of the cabs, so I can't tell you what they came out of...sorry.
...
But as we all know, the HOM isn't perfect and Celestion swapped stuff around a lot.

Yes, unfortunately, the dates logged in Celestion's entry book have proven to be unreliable. It's too bad better records weren't kept. But again, if anyone can verify an original '69 or earlier '100' cab being originally fitted with anything other than a G12H with a bass cone, please do so.

I always heard the tone of G12M's in early Hendrix, G12H30 55hz later after 68.

Cream photos provide a good reference, as the '100' cabs don't appear until Clapton perms his hair, which is no earlier than Dec '66. This suggests we wouldn't hear anything recorded with a '100' cab until at least the final quarter of '66.