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Questions for Salectric and Lokie re P15LL

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Posted on March 10, 2017 at 10:53:39
bald2
Audiophile

Posts: 141
Location: Oregon
Joined: January 21, 2006
Greetings-
I have some 32B horns and am thinking of building a two way with the P15LL. I'm looking for cabinet and crossover suggestions. Can you help?

Thanks-

Harry Z

 

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RE: Questions for Salectric and Lokie re P15LL, posted on March 10, 2017 at 16:57:07
Salectric
Audiophile

Posts: 998
Location: East Coast
Joined: February 23, 2003
Contributor
  Since:
November 13, 2015
What compression driver are you going to use on the 32 horn?

I can send you some cabinet and crossover information later this weekend after I return home from a trip.

 

RE: Questions for Salectric and Lokie re P15LL, posted on March 10, 2017 at 17:20:37
bald2
Audiophile

Posts: 141
Location: Oregon
Joined: January 21, 2006
I'm probably going to use the Emilar EA 175 or Altec 802Ds, if I can find some at a reasonable price.

My email is harryzweben@yahoo

Thanks:)

 

RE: Questions for Salectric and Lokie re P15LL, posted on March 10, 2017 at 17:37:33
lokie
Audiophile

Posts: 1208
Location: Georgia, USA
Joined: January 28, 2003
My first advice is to do it... you wont be sorry.

I'll get back to you as to cabinet size and dimensions when I get back home from traveling. I think it's around 5.5 cu ft?

Regarding crossover... the impedance on the Jensen P15ll's is approx. 16ohm's. Do you know which compression driver you plan to use and it's corresponding impedance? Salectric uses an 8 ohm and I use a 16ohm... so either one will work fine but the crossover will need to be designed accordingly.

Have you checked out the JE Labs site? some good nuggets there.

I will be glad to help w any questions you have but Salectric is the man here and has helped me more than I can ever thank him.

I love these speakers. They are not perfect but are the best speakers I have heard in my house and considerably better than the Tannoys I had previously.

 

RE: Questions for Salectric and Lokie re P15LL, posted on March 11, 2017 at 04:16:21
Randal P
Audiophile

Posts: 31
Location: NYC Area
Joined: August 19, 2004
"Reasonable Price" is relative. The current benchmark is the GPA 802G at about $500 a pair. They are new and guaranteed to meet spec. If you find used 802's on Ebay you may need to replace the diaphragms ($90 from GPA) or even remagnetize them. Unless you get them really cheap you'll end up spending the same price. However you may get lucky. I found a pair of 802D's with new diaphragms for a good price from a fellow enthusiast who was looking just to get his money back.

There is currently a pair of 802D's on Ebay with a field coil conversion. They are very tempting. But with more than two days to go they are at $385/pair. I can see them going for some silly money.

 

Do not assume Field Coils are better........, posted on March 11, 2017 at 08:01:56
drlowmu
Manufacturer

Posts: 9702
Location: East of Kansas City
Joined: January 10, 2005
The field coil conversion, may, or may not be better than the original alnico. Do not assume, because its a field coil, that it is automatically better than the alnico !!

More than a dozen RCA filed coil drivers ( MI-1428B and MI-1443s ) I have personally owned, and have passed through my hands. I was an early user and proponent of these, ( and I owned six RCA Ubangie Bass Horns, all at one time ). Today, I am VERY happy having ALTEC alnico 802Ds, remagged and GPA re-diaphragmed. YMMV.

There are other areas where we can gain performance. IMHO, "I" would NOT ever buy a magnet "converted" 802 unless I was able to A-B them in a relaxed manner, over time, on my system. No-knowing - WHAT will sound best. You better have a GOOD amp and a good source, and optimized wiring / a truly optimized crossover, when you compare 'em, to make a good determination.

My post's point is " a field coil is NOT necessarily automatically better , AND, it may be automatically worse."

See if anyone here can figure out why this might be so, technically. I know someone, very experienced with early movie theater W.E. RCA, etc, who has this figured out.

Jeff Medwin

 

Email sent, posted on March 12, 2017 at 11:06:54
Salectric
Audiophile

Posts: 998
Location: East Coast
Joined: February 23, 2003
Contributor
  Since:
November 13, 2015
I sent you an email. Let me know if you didn't receive it.

 

RE: Questions for Salectric and Lokie re P15LL, posted on March 15, 2017 at 08:40:53
Hornlover
Manufacturer

Posts: 2095
Joined: March 8, 2002
The P15LL was designed for the Jensen Imperial corner horn. It performs very well in that design. If you have the room, that is what I would recommend. I have 3D cad modeled plans for the enclosure if you want them.

 

RE: Questions for Salectric and Lokie re P15LL, posted on March 15, 2017 at 10:17:17
bald2
Audiophile

Posts: 141
Location: Oregon
Joined: January 21, 2006
Thanks. I bet it's terrific.

For now I've decided to build the JE Labs Altec 414 two way. I may build a bigger system later. I already have the 32B horns, 414Zs en route, cabinets (need baffles cut) and crossover parts are coming together.

Much appreciated to all:)

Harry

 

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