My open baffle dipole with Beyma TPL-150

[StigErik]

Full specs have not yet been published by Beyma.....

[Lindell]

Originally posted by StigErik


What kind of measurements would you like to see?

Close to the cone and in-room measures

[StigErik]

Ah, you mean near-field vs. far-field frequency response. OK...

We will EQ this thing quite a lot, so expect more or less flat anechoic (near-field) response, the target is within +/- 1 dB.

When it comes to bass, we wish to try to put the -10 dB point around 25 Hz. Lets see if the woofer can handle that.

[catapult]

Hi guys. I'm late to the thread. Those looking for big OB bass arrays may be thinking of Monte Kay's theater project. He uses 24 x 15" subwoofer drivers in W frames for the bass and OB line arrays for the mains.

http://www.mfk-projects.com/home_theatre.htm

[mige0]

Originally posted by catapult
Hi guys. I'm late to the thread. Those looking for big OB bass arrays may be thinking of Monte Kay's theater project. He uses 24 x 15" subwoofer drivers in W frames for the bass and OB line arrays for the mains.

Thanks for the link !
enough never seems to be enough (I'd need another 20 of my 15" - too much - definitely)...

But to be serious - distrbution of that sub's is great all over the room - very impressive performance


StigErik - beautiful woodwork - looking foreward to your measurements

Michael

[StigErik]

Here's the latest development. I've finished one baffle, and mounted the drivers. The second baffle will be done tomorrow.

[pk]

Hi StigErik,

They look really great! I look forward to see the measurements. In a previous post you stated that you aim at crossover points at 150 and 1500 Hz. I would definately try out a higher crossover point between the 21" and the 8" (e.g. 200-250 Hz). In case a higher crossover point is feasible without compromising the sound in the low mids, the higher mids will probably benefit from doing so:-)

BTW: I have just purchased a pair of Beyma TPL-150H (the horn loaded version of the AMT driver) for my horn rig, and I am clearly impressed by this tweeter!

Best regards
Peter

[StigErik]

It will be 200 and 1500 Hz. We moved the XO up to 200 with the 18" prototype as well. 250 may be a bit too high for the 21", but we'll try anyway.

The TPL150 is truly great. It sounds absolutely wonderful, has very high sensitivity, and can handle LOTS of power. What other tweeters can do all that? I guess none.

[cixelsid]

Originally posted by StigErik
The TPL150 is truly great. It sounds absolutely wonderful, has very high sensitivity, and can handle LOTS of power. What other tweeters can do all that? I guess none.

More than enough sensitivity to match a W22EX001. Also it can handle a 1kHz crossover point and a lot of power.....



*Power handling: 40 watts RMS/160 watts max *Impedance: 4 ohms *Re: 2.9 ohms *Frequency response: 800-20,000 Hz *Minimum crossover frequency: 800 Hz at 12dB/octave or more *SPL: 92 dB 1W/1m

[StigErik]

Thats a good one there, but consider that the Beyma has 7 dB (99 vs 92 dB) higher sensitivity and 3 dB (80 vs 40 W) higher power handling... thats a 10 dB difference.

An other good example is the Stage Accompany SA8535 ribbon, but its useless below 1700 Hz, and its not dipole.