active JBL monitors from 1960's?

[vernb]

I just bought a pair of JBL studio monitors today. They each have an inbuilt JBL SE408S power amplifier.

The monitors have the following drivers:
2405 tweeters
LE175 drivers on 1217-1290 potato masher horns
D140R bass drivers
PR15 passive radiators

Very nice teak cabinets and a very compact design, just enough to fit the drivers.

What are they called?

They have been in a studio at the national Danish Radio since new.

I will post pictures later

Vern

[vernb]

crossovers are 3105 and 3110

I think 3110 cross over at 800hz ?

[jcrobso]

I just bought a pair of JBL studio monitors today. They each have an inbuilt JBL SE408S power amplifier.

The monitors have the following drivers:
2405 tweeters
LE175 drivers on 1217-1290 potato masher horns
D140R bass drivers
PR15 passive radiators

Very nice teak cabinets and a very compact design, just enough to fit the drivers.

What are they called?

They have been in a studio at the national Danish Radio since new.

I will post pictures later

Vern

500hz would be on the low side for LE175 DHL.
JBL did offer the SE408S as an option on many speakers of that era.
Pictures will help!

[toddalin]

What are they called?

Vern

Someone's project.

[jbl007]

Hi,i`m Juha from finland

I have pair of those too without amps.My pair was SR(sverige radio) and SVT(sverige television)use.Drivers are 2420/1217/1290 potato masher,D140r and PR15.network is N1200.Pick some pictures!JBL made those only radio and TV use.No model only serial number.

[vernb]

So they really are a set of Olympus S7R but with D140R instead of LE15a.

Mine seem to have been the same as yours and in 1975 the 2405 tweeters have been added and crossovers changed for 3110 and 3105. A label at the back says this.

I have been playing them for a while now with just a H/K Citation Eleven preamp driving the JBL S408S amplifiers in them. Very nice sound.

Pictures will come SOON