Author Topic: Tried RS52 mid as a tweeter  (Read 1710 times)

Offline Shonver

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Tried RS52 mid as a tweeter
« on: January 08, 2011, 12:49:31 pm »
I'm building a rough-and-ready 3-way which uses the Dayton RS-52 metal dome midrange driver. I noticed that this driver has a response that reaches very close to 20kHz. It occurred to me that the RS52 might work as a tweeter. Now, there is a rather nasty peak at around 13kHz but I thought I could tame that with my DSP crossover.

So I did it. I must say that it doesn't sound half bad. I managed to suppress the peak at 1344Hz and implement as a 2-way. It is passable. There was a hint of sibilance still, but I think these would cut it a surround speakers (as suggested above). However, the real performance became evident when I implemented the 3-way design: the tweeter just added that missing sparkle and cleanness at the top.  Possibly, with a boost to the upper frequencies for the 2-way and individual equalisation (matching) of the RS52s, a better performance can be achieved.

BTW, for the 2-way the crossover was LR4 at 600Hz, and the 3-way was LR4 at 600Hz and 3.5kHz.

RS52 response. Light blue is raw response, black is target, red is filter response, and dark blue is final response.


Total loudspeaker response of the 2-way.


Response of the 3-way.


Some more info about the loudspeaker: the box and driver cutouts were originally intended for another project that was aborted, thus the hack job you see. The tweeter is an OEM unit claimed to be from the Vifa factory, and the woofer is a Super8 from ApexJr. The box is sealed, and there is some equalisation applied to the woofer to extend its response. A very quick and nasty effort.

Box
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Offline ghostinthemachine

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Re: Tried RS52 mid as a tweeter
« Reply #1 on: January 08, 2011, 11:43:54 pm »
I'm building a rough-and-ready 3-way which uses...

Box


I like the look!

Offline Shonver

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Re: Tried RS52 mid as a tweeter
« Reply #2 on: January 09, 2011, 01:28:26 am »
I like the look!

It's a reworked B&O box, with a new MDF baffle glued on top of the old one. Too nicely made to throw away!

With the amount of EQ thrown at the woofer, it goes deep, but I am struggling to get a good mid-bass thump out of it. Must do some measurements of the completed speaker.
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Offline Prince

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Re: Tried RS52 mid as a tweeter
« Reply #3 on: January 10, 2011, 05:53:40 pm »
I agree - the look of the driver mounts look unique!!

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Offline Shonver

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Re: Tried RS52 mid as a tweeter
« Reply #4 on: January 19, 2011, 08:38:47 pm »
So I got rid of the squiggley EQ, and have only frequency contouring and wider-band EQ now. This cleared up a bit of sibilance, and the highs are sounding fairly clean now. The problem with using the 2-incher as a tweeter is that the top octave is only flat on-axis. There is a way around this: give the top a rising response. But then one would have toe the speakers in or out to get a good balance at the listening position. Reverting to a 3-way makes the sweet spot wider. I think the RS52 will work well in a car as a tweeter, as the seating position is fixed there. Would also help with sending less energy to the glass, so reflections will be attenuated. It could work.

I must just say, also, that this Super8 surprises me. It is not the final word in bass resolution, but it can go deep (with EQ). A few of them in array will do fine, and I suspect it will also do good in a car. It is $70 for two from ApexJr.com.

Quote
The Apex Super 8 Subwoofer has a great following and offers the best bang-for-the-buck performance of any 8" sub currently available. It outputs very tight, deep bass at volume levels much higher than expected for a small driver..
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Offline johnc

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Re: Tried RS52 mid as a tweeter
« Reply #5 on: January 19, 2011, 09:03:46 pm »
Agreed. Good bang-for-the-buck.
IMO these are a slightly better deal:
https://www.madisound.com/store/product_info.php?products_id=8991

As with the Super 8 I'm sure, these certainly do exceed one's expectations.

But I must say, the Super 8 looks more serious. ;)

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