Freq. response of Jensen RP 109's?

[Thinker]

there's a pair of Jensen RP 109's I'm looking at and I can't find out what there freq. response is. Anybody know what there range is?

Thanks

 

[Thinker]

bump

 

[mhardy6647]

I looked at the usual suspects' regular hangouts (i.e., www.hifilit.com and http://www.tubebooks.org/file_downloads/Jensen_spkr_plans.pdf) and came up short.
The RP-109 was that rather large cast aluminum horn and driver that Magnavox used in older consoles (e.g.). I've got a couple of 'em downstairs. I'd guess the cutoff on 'em is 800 Hz or so. I know they are not very extended - maybe (SWAG) 12 kHz or so.
Probably triple-digit sensitivity.

How's that for eyeballed specs? ;-)

 

[Thinker]

Thanks! I was hoping that they were more of a squaker than a tweeter, i'm thinking about using them in a 3 way setup like my cornwalls, I would get them, some maggie 15" ers with them and then some K-79 klipsch tweeters.

 

[mhardy6647]

They probably are better suited to high MR than to anything else - that said, they're not bad sounding drivers (I feel like I am damning them by faint praise).

 

[Thinker]

what would you suggest for crossover points?

 

[Gang-Twanger]

They probably are better suited to high MR than to anything else - that said, they're not bad sounding drivers (I feel like I am damning them by faint praise).

"High MR"??

I remember seeing this on AK in the past, but I can't remember what it's supposed to mean.

It's weird how there's been quite a few Jensen threads popping up lately.

 

[Thinker]

I'm thinking High Midrange?

 

[mhardy6647]

that's what I am thinking

I dunno the cutoff on them horns; 800 Hz? 1k? Something like that...

 

[fxer1982]

i use magnavox 580088-1 for mids, freq crossover at 1000 to 4000 for mids, mine sound very nice...my amp is 12-15 watt per side...

 

[Thinker]

Do you think that the CTS 15" woofers can go to 1000 Hz?

 

[Gang-Twanger]

I'm thinking High Midrange?

Ah, yes. Thank you. Didn't want to move past the moment without learning something.

 

[biscuithead]

Resurrecting an old thread...

I am building a pair of these and I will be guessing at the crossover points... The RP-109s I was going to cross @ 1200, the mid range (PD-500) will be band passed 500-1200. What do you all think?

i use magnavox 580088-1 for mids, freq crossover at 1000 to 4000 for mids, mine sound very nice...my amp is 12-15 watt per side...

What do you think?

that's what I am thinking

I dunno the cutoff on them horns; 800 Hz? 1k? Something like that...

Thoughts?

Thanks!

 

[CopperWizard]

I have mine crossed at 1250 with a 8uf and it rolls off mechanically at around 13000. I just took a closer look at the photo you posted, are those 109's up top? I'm very intrigued now, can you share the project specs?

 

[biscuithead]

I have mine crossed at 1250 with a 8uf and it rolls off mechanically at around 13000. I just took a closer look at the photo you posted, are those 109's up top? I'm very intrigued now, can you share the project specs?

The theater speaker model is a Jensen E-516. I originally only picked up the cabinets, and the mid horn (PD-500). The project specs are me just winging it... I have tried to find a crossover schematic to no avail. The guy I got them from told me he sold the horns, and that they were 109s on top (6 on each). I will probably just load them up, tri-amp hooked to an active and see what I like... I was searching for a starting point at the 1200 and 500 points. I have a number of super tweets to cover above 12000, so I would add that to the passive once I got the three dialed in.

I think the crossover is model 700XL - M1696

 

[biscuithead]

I'm mixed up... The 700XL is a Jensen model of speaker that was to lead me into knowing the FR of the PD500... This isn't the crossover for the E-516 model.

 

[mitchalee]

Alrighty then.

I just got some early 60s unbranded loudspeakers 31 x 20 x 15 with this compliment of drivers:

LOUDSPEAKERS - Custom Hand Assembled

CTS WOOFER:
Sample # 15-0276
Model # 15F10430
Date 7-10-64
Mag. Wt 1.07 lbs.
Res. 45 c.p.s.
V.C.D.C. 6.90 Ohms
CTSOFPADUCAH, INC.

JENSEN HORN TWEETER:
RP-109A C7745-2
220 425

Duh . . .

I was expecting them to sound like Doris Day smiling at Rock Hudson: AIR-BRUSHED. And they do.

Low resolution. Highs fading at 12.5 and gone by 16.5; lows fading by 65 Hz and gone by 35 Hz.

HOLD YOUR HORSES! I can hear you now, "35 Hz?! More like gone by 45 Hz!!!" Nope. Given the size of the cabinet, the woofer, its smaller magnet (yes . . .), and . . . well, its not sealed enough to really be acoustic suspension, but it is closed, SO . . . the bass should fade very gradually for a long time starting high, so maybe even fading by 75 Hz and out by 25 Hz . . . That would not surprise me at all.

Anyway, the charm of this system is exactly what a lot of audiophiles would get busy fixing. It sounds classic early 1960s. And from my listening recliner, as a collector and audio gourmand, they are nearly perfect examples of WHAT THEY ARE.

Now, getting back to the tweeter, some folks would intentionally cut the highs at about 13 kHz because above that they are not the cleanest, but they are no horrible, just not state of the art OBVIOUSLY. And they have tons of charm with music like Wild Bill Davis and Johnny Hodges Live. Or some mellow Nelson Riddle. No, the bones won't bite but neither will they offend. And the bass will be a perfect, relaxing warm bath with herbs and wine.

So my advice is that these tweeters are wasted on a hifi modern rig. Their real charm is their period "limitations". And that is how I use them.

If I want something else, then I will hook it up. For clean Thiel CS3.5. For snap and pluck, Maggies. For ambiance Design Acoustic D-12. And for Star Wars, the big Klipsch. For . . . well you get the idea.

Cheers!
Mitch

 

[Rick Owen]

Alrighty then.

I just got some early 60s unbranded loudspeakers 31 x 20 x 15 with this compliment of drivers:

LOUDSPEAKERS - Custom Hand Assembled

CTS WOOFER:
Sample # 15-0276
Model # 15F10430
Date 7-10-64
Mag. Wt 1.07 lbs.
Res. 45 c.p.s.
V.C.D.C. 6.90 Ohms
CTSOFPADUCAH, INC.

JENSEN HORN TWEETER:
RP-109A C7745-2
220 425

Duh . . .

I was expecting them to sound like Doris Day smiling at Rock Hudson: AIR-BRUSHED. And they do.

Low resolution. Highs fading at 12.5 and gone by 16.5; lows fading by 65 Hz and gone by 35 Hz.

HOLD YOUR HORSES! I can hear you now, "35 Hz?! More like gone by 45 Hz!!!" Nope. Given the size of the cabinet, the woofer, its smaller magnet (yes . . .), and . . . well, its not sealed enough to really be acoustic suspension, but it is closed, SO . . . the bass should fade very gradually for a long time starting high, so maybe even fading by 75 Hz and out by 25 Hz . . . That would not surprise me at all.

Anyway, the charm of this system is exactly what a lot of audiophiles would get busy fixing. It sounds classic early 1960s. And from my listening recliner, as a collector and audio gourmand, they are nearly perfect examples of WHAT THEY ARE.

Now, getting back to the tweeter, some folks would intentionally cut the highs at about 13 kHz because above that they are not the cleanest, but they are no horrible, just not state of the art OBVIOUSLY. And they have tons of charm with music like Wild Bill Davis and Johnny Hodges Live. Or some mellow Nelson Riddle. No, the bones won't bite but neither will they offend. And the bass will be a perfect, relaxing warm bath with herbs and wine.

So my advice is that these tweeters are wasted on a hifi modern rig. Their real charm is their period "limitations". And that is how I use them.

If I want something else, then I will hook it up. For clean Thiel CS3.5. For snap and pluck, Maggies. For ambiance Design Acoustic D-12. And for Star Wars, the big Klipsch. For . . . well you get the idea.

Cheers!
Mitch

For midrange use in a three way, how would the 109's compare to say the wolverine M-10's?