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jensen mod 32 ohm 10 for svt . opinions needed please !

jarrod cunningham

jarrod cunningham

Apr 24, 2007
3,103
5
sylacauga alabama
Disclosures
spector basses
#1
ok , so all im using now are traynor yba 200 tube heads . im still waiting on my peavey vb2 , but basically still the same power . so i need to replace some 10's in one of my svt's . on fliptops i can buy a 8 pack of the jenses mods 10" 32 ohm 50 watters for 240.00 . they are 50 watters instead of 100 watters , so i think the amp and cab would be more efficient with the mod speakers . who agrees and who dissagrees and why for each reason . i just wanna make sure i but a good sounding speaker that will work well with my 200 watt tube heads .
 
#2
I've never used them for an SVT but I have a 12" Mod in my little 15w Airline tube guitar amp from 62. It's decent, but I think I could do better if I wasn't so cheap. However, Bruce's opinions are pretty reliable, so if he says they're good, then I tend to believe him.
 
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#4
bassrockstar said:
they are 50 watters instead of 100 watters , so i think the amp and cab would be more efficient with the mod speakers .
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There is no correlation between a driver's power capacity and its sensitivity. Also note that the Mods are guitar drivers. They have a much shorter xmax than the Ampeg/Eminence drivers, and a very high Fs, as a result they have thin bass response and will only take about 10 watts before farting out.
 
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#5
billfitzmaurice said:
There is no correlation between a driver's power capacity and its sensitivity. Also note that the Mods are guitar drivers. They have a much shorter xmax than the Ampeg/Eminence drivers, and a very high Fs, as a result they have thin bass response and will only take about 10 watts before farting out.
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Bill , if these are guitar drivers then why does fliptops.net put them in the svt replacement section ? they say that they are direct replacements for vintage svt cabinets .
 
#7
Well, I think both Bill AND Fliptops are right. Is it a dessert topping? Or is it floorwax? It's both floorwax AND a dessert topping! From the US Speaker website for the Jensen Mod 10-50:

10" Guitar & Bass Speaker
50 Watts RMS
100 Watts Program
Available 4,8,16 or 32ohms
32 ohm version works great in SVT cabinets​
Actually all the Mod speakers say they are "Guitar and Bass" speakers. I'm guessing that they are designed as low cost compromise drivers that work OK for guitar and bass applications, but aren't the best for either. My guess is that they'll work OK but not great, but then again one isn't going to get a lot of performance at that price.
 
#8
bassrockstar said:
Bill , if these are guitar drivers then why does fliptops.net put them in the svt replacement section ? they say that they are direct replacements for vintage svt cabinets .
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Because the original '69 SVT used guitar drivers. True ten inch bass drivers didn't become available until the mid '70s. The drivers used in the SVT have been upgraded at least twice in the interim, the last time in 2001 AFAIK.
 
#9
billfitzmaurice said:
Because the original '69 SVT used guitar drivers. True ten inch bass drivers didn't become available until the mid '70s. The drivers used in the SVT have been upgraded at least twice in the interim, the last time in 2001 AFAIK.
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"Upgraded;" that's funny. If by "upgraded" you mean reduced sensitivity and narrower frequency response then I guess, yes, you could say the speakers were "upgraded." The rest of us will say they were redesigned to be cheaper. Your opinion on what constituted a "true ten inch bass driver" in regards to the SVT 10" is inaccurate.

I doubt the Jensen Mod speakers are good, but for the testimony of someone who actually built an old SVT cab clone and tried them in it, you need to get in touch with okabass and read this thread.
 
#12
bassrockstar said:
anyone ???
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HI

I've made kind of early 70´s SVT 8x10" cab clone, but with an angled back (for easier transport). It has the Jensen MOD 10"/ 50 W/ 32 Ω speakers.

http://www.okabass.suntuubi.com/?cat=10

I feel they work at least very well. I haven't A-B it with an Ampeg cab, but several Ampeg cab players have tried the rig, and give very positive comments. Actually no negative comments at all.
I feel that it isn't so muffled than the -95 svt cab I've played. The clones lo end is good for band contex, and the mids and the treble are nice to my ear, too. The sound is quite muscular. The elements have not farted or bottomed out. They have taked the lo B-string and thumping nicely. I don't know how loud you play, but I'd say that at least "normal" band volumes come out nicely.
I feel that the closed cab, 32 Ω elements parallel and big, good tube amp are essential for the elements good performance. I would not use them series connected in a bass reflex cab and with a big transistor amp: they have so small x lin max and take only 50 W.
 
#13
Back in '73 I bought 8 10-inch SVT speakers from a local Ampeg dealer to make two 4x10 cabs (no 4x10 cabs were available from Ampeg back then). The drivers had alnico magnets and fairly stiff cones with cloth accordion surrounds. 32 ohms, all wired in paralell. Fairly low fs and reasonably long xmax as I recall.
 
#15
okabass said:
I would not use them series connected in a bass reflex cab and with a big transistor amp: they have so small x lin max and take only 50 W.
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In drag racing and in bass cabs there's no replacement for displacement. The displacement of the Mod 10 is 52cc. That's how much air it can move. The displacement of the Eminence/Ampeg driver is 158 cc. One doesn't need a degree in audio engineering to realize that the driver with three times the displacement is going to go a lot louder.
The OP seems to be searching for the least expensive alternative. The least expensive alternative is seldom the best.:atoz:

BTW, as far as a 200 watt head is concerned, you can get away with eight Mod 10s, they'll work well enough with that amount of power. But they won't work as well as only four good quality tens. Eight good quality tens would handle a pair of 200w heads.
 
#16
billfitzmaurice said:
In drag racing and in bass cabs there's no replacement for displacement. The displacement of the Mod 10 is 52cc. That's how much air it can move. The displacement of the Eminence/Ampeg driver is 158 cc. One doesn't need a degree in audio engineering to realize that the driver with three times the displacement is going to go a lot louder.
The OP seems to be searching for the least expensive alternative. The least expensive alternative is seldom the best.:atoz:

BTW, as far as a 200 watt head is concerned, you can get away with eight Mod 10s, they'll work well enough with that amount of power. But they won't work as well as only four good quality tens. Eight good quality tens would handle a pair of 200w heads.
Click to expand...
What I don't get, though, is why Ampeg doesn't have Eminence voice them to be brighter like the old SVT CTS's? I remember starting a discussion about increased power handling and the lack of high end on the newer speakers, and you said it was unrelated. I must admit that the Eminence Delta 15A sounds just like the 60's CTS in my B-15N and it handles like 6x the power, so apparently it can be done. So why wouldn't they when it's obvious that the original CTS's and Eminences are preferred tonally by pretty much everyone?
 
#17
JimmyM said:
What I don't get, though, is why Ampeg doesn't have Eminence voice them to be brighter like the old SVT CTS's?
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Because the original CTS tens were guitar drivers. Guitar drivers have a higher resonant frequency than bass drivers. The Mod 10 Fs is 107 Hz, the Ampeg/Eminence is 49 Hz. That's over an octave of response that the Mod 10 gives away in the low end. If you want that original '69 tone put two Mod tens in the uppermost chamber of the cab, with a high pass capacitor so that they won't fart out, and load the other chambers with bass drivers. Or load a 2x10 with the Mods, with the same filter, and run them atop a 4x10 loaded with bass drivers, for a more compact solution that will still significantly outperform eight Mod 10s.
 
#18
billfitzmaurice said:
Because the original CTS tens were guitar drivers. Guitar drivers have a higher resonant frequency than bass drivers. The Mod 10 Fs is 107 Hz, the Ampeg/Eminence is 49 Hz. That's over an octave of response that the Mod 10 gives away in the low end. If you want that original '69 tone put two Mod tens in the uppermost chamber of the cab, with a high pass capacitor so that they won't fart out, and load the other chambers with bass drivers. Or load a 2x10 with the Mods, with the same filter, and run them atop a 4x10 loaded with bass drivers, for a more compact solution that will still significantly outperform eight Mod 10s.
Click to expand...
Wow, that's genius, Bill! You never cease to amaze me. I probably won't try it because I'm happy with my old straightback cab as it is, but it's a great tip for those who aren't.
 
#19
billfitzmaurice said:
BTW, as far as a 200 watt head is concerned, you can get away with eight Mod 10s, they'll work well enough with that amount of power. But they won't work as well as only four good quality tens. Eight good quality tens would handle a pair of 200w heads.
Click to expand...


HI

Well. Have you tried the 10" MODs in an SVT enclosure? I drive my 8 x10" with MODs with my 300 W SVT clone and NO farting out at 10 W as you said. That is -in my experience- BS. I feel that the cab is not specially thin sounding.

I wrote: "The elements have not farted or bottomed out. They have taked the lo B-string and thumping nicely. I don't know how loud you play, but I'd say that at least "normal" band volumes come out nicely" At $ 30 per speaker they work surprisingly well.
I got that knowlidge from using and listening those speakers, not reading some spec sheets.
I have an SWR 4x 10" with Eden speakers. I think those are much better elements than the MODs. However, I like the 8x10" sound and feel much more.
 

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