Synergy Horns-Dayton and PRV.....

[SpeakerScott]

Re: Synergy Horns-Dayton and PRV.....

[SpeakerScott]

Re: Synergy Horns-Dayton and PRV.....

[Ryan]

Re: Synergy Horns-Dayton and PRV.....

This is an interesting build, you can't walk out of BestBuy with something like these! Great work! Lots of pictures too, I like.

[SpeakerScott]

Re: Synergy Horns-Dayton and PRV.....

This is an interesting build, you can't walk out of BestBuy with something like these! Great work! Lots of pictures too, I like.

No...very true...you can't get these at a BestBuy. I'd put them up against anything out there.....I *might* lose the comparison...but odds are not.

[SpeakerScott]

Re: Synergy Horns-Dayton and PRV.....

Next up is the midrange cup. I had to dremel out the inside lip of a 3" PVC endcap...but otherwise they work very well. They are hot glued to the horn. Be patient...it takes a while for the glue to cool enough to hold them on. Once completely cool...it's actually hard to get them off. They can be removed by slow careful cutting with a utility knife...for driver replacement.

Note that the wires come through the end of the end cap and all surfaces are sealed.

Also note that the compression driver is held in place by the compression action of a board with two strips of foam. Holds in in place easily...and well. Probably not suitable for something that's needed for touring...but for carrying up my stairs...just fine.

The outside finish is Duratex....love it.

[SpeakerScott]

Re: Synergy Horns-Dayton and PRV.....

Last...for now is the crossover.

I have two version...A and B....A uses 9mH in series with the woofer and 40 Ohms in parallel with the mid. B uses 8 mH in series with the woofer and 13 Ohms in parallel with the mid. The difference is a bit more midbass and less midrange. I found the A version a bit too analytic ...but I left it as the center channel for the home theater. Made voices absolutely intelligible in HT usage...even if the rest of the track is busy and rubbish.

The comparison plot shows A vs. B....A has a bit more output in the midrange and less in the bass.

I think I've explained before that SoundEasy should be called Sound "Really kind of difficult, but with a enough work will get the job done, though you'll practice cursing a lot" I don't buy the measurements below about 200 Hz for the woofer...so I'm running a bit blind. I'll re-take and see what's actually happening and refine the crossovers as needed. These aren't the last crossovers....for sure. Plenty of optimization for measured time domain and frequency domain performance

[Wolf]

Re: Synergy Horns-Dayton and PRV.....

Is the reason for the 5.5mH in series for the LP on the midrange due to the increased gain the horn adds to the responses? Or are you running them in straight series? 32 ohm nominal after the padding might account for the need for the larger coil and smaller cap like you have there.
Curious...
Later,
Wolf

[msibilia]

Re: Synergy Horns-Dayton and PRV.....

What do R23 and C24 do? If you are driving from a normal, voltage source type amplifier, I don't see that they make any response change. Are they impedance correction of some form to make the load easier for the amp?

[SpeakerScott]

Re: Synergy Horns-Dayton and PRV.....

Is the reason for the 5.5mH in series for the LP on the midrange due to the increased gain the horn adds to the responses? Or are you running them in straight series? 32 ohm nominal after the padding might account for the need for the larger coil and smaller cap like you have there.
Curious...
Later,
Wolf

Parallel series, 8 ohm nominal load. The inductor is needed for the horn gain...here are plots with and without filter for the mid. And with and without series inductor....

[SpeakerScott]

Re: Synergy Horns-Dayton and PRV.....

What do R23 and C24 do? If you are driving from a normal, voltage source type amplifier, I don't see that they make any response change. Are they impedance correction of some form to make the load easier for the amp?

Yeah...probably not critical....but it does keep impedance phase reasonable...sometimes necessary for amps with less than stellar stability.