Celestion SL6s restoration: Part I
Celestion SL6s restoration: Part II
Celestion SL6s restoration: Part III
Some measurements of the speakers with and without crossover:
Celestion SL6s Spkr A impedance no xover red=woofer white=tweeter
Celestion SL6s Spkr B impedance no xover red=woofer white=tweeter
Celestion SL6s Spkr A impedance+xover red=woofer white=tweeter green=speaker
Celestion SL6s Spkr B impedance+xover red=woofer white=tweeter green=speaker
Low frequency nearfield measurement
Red = Mic in baffle plane
White = Mic nearfield, few mm from cone
Celestion SL6s A Low freq resp nearfield & baffle plane
Celestion SL6s B Low freq resp nearfield & baffle plane
Simulations with Basta:
I made a set of simulations based on the measured woofer data, including the baffle response.
- Closed box 10,9 liter
- Damping fill 80%
- Baffle 20x37cm
Basta simulation - spkr A&B freq response-impedance-max output with xover
Basta simulation - spkr A&B freq response-impedance-max output no xover
Basta simulation - spkr A&B freq response-impedance-max output no xover - show group delay
Basta simulation - spkr A&B freq response-impedance-max output no xover - show effect of damping
And just for fun a simulation of the Celstions with the OB sub (see Part I). Probably more a fantasy than a realistic simulation, but it shows that the combination is at least possible.
The OB sun woofer is a Redcatt 154FINDX8-298 15" woofer with TS data from the German Hobby Hifi magazine. Crossover is @120Hz, 24dB/oct Linkwitz-Riley.
Part IV describes my experiences with the Celestions, some comparisons, and at a later data, when the wheather improves, more measurements. I plan to do a full set of FR and polar measurements.
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