Hello, I have Fostex FE103En in recommended back loaded horn type enclosure (2 of them). Both dust caps are completely messed up - who has children, can understand how this can happen 😉 I too have always had had a on / off subsonic popping issue due to my OPAMP active crossover, since I have a mono sub too (cinema application). I am thinking of different ideas: Replace broken FE103En by new ones AND include series capacitor ~150uF (??) for subsonic protection OR replace them by more expensive W4-1320SJ, which has higher excursion capability, right? OR I could use the W4-1320 PLUS subsonic high pass caps. Hard to get foil type caps at reasonable size, so I may need to use bipolar electrolytics to fit into the horn enclosure.
What is your opinion?
What is your opinion?
If you are high passing your fullrange, you no longer need back loaded horn enclosure, any small box will do. High passing will reduce distortion significantly, its a step in right direction.
Look at some FaitalPro small fullranges, they are relatively flat, non expensive and handle a lot of abuse.
Good luck.
Look at some FaitalPro small fullranges, they are relatively flat, non expensive and handle a lot of abuse.
Good luck.
Not the best enclosure. We burned the ones we built.
Try this first, if that does not work (they will likely need to be shorter for the FE103): http://www.planet10-hifi.com/downloads/FE108eS-PhasePlug-plan.pdf
A passive cap has issues that low due to the system resonance.
dave
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High passing at very low corner frequency of course. Since the total complex frequency dependent impedance in the horn enclosure is definitely NOT like a flat 8 Ohm resistor, I am not sure how many uF I 'd need to get...maybe....say....56Hz.... ?
Well, thats not effective at all. I was thinking about high passing at ~150Hz, which would have significant effect on reducing distortion.
But 56Hz will likely have no effect. So I am out.
But 56Hz will likely have no effect. So I am out.
I am not talking reducing distortion at all, I 'm talking mitigating the bad effect of the 8 Hz .... 12 Hz pops that occur, when I switch on my signal chain in the "wrong" order. I built an OPAMP Xover many years ago. It works well. At least in steady state. During turn on while ramping up the OPA 134 DC supply rails - not so well.... 😉