Are these late '80's Philips tweeters? Anyone know SPL/Z?

[grantnsw]

Hi ,

Is there a Philips speaker guru out there who can help me please?

I have tweeters from the Richter Harlequin MkII ( Australia circa 1989 by Ralph Walters ) which were evidently an excellent 2-way for their time.

The bass are Audax 6.5 inch but I have no information on the tweeters
which have a 110mm diameter faceplate(flange). My digicam won't upload so I can't show pics of them.

The numbers on the back of the tweeters are :

oo11402/T4JFF ( 0011402 ?) then 2404 257 43701

The numbers above look very much like Philips tweeter catalogue codes?

I think T4 means 4 Ohm (tweeter of course) but no idea what JFF means.

( there are some other numbers as well: 20138 at top, then DD01 01 623 75 underneath.)

Can anyone identify these please because I want to try to find SPL / Z plots and T/S parameters for them.

I drew a blank at this archive site: mfbfreaks : Official Site ( Luidsprekers / Passief / Speaker Info)

One last question please, would anyone know how they compare, regarding distortion etc to say, the Seas 27TDFC?

Thanks very much indeedy! (especially Rabbitz) .... Grant