Lambda TD6 tests on the way

[gbegland]

Nothing yet, but some teaser photos. Testing them out for a friend and also possible usage for another high end studio monitor client.

From left to right we have, Anarchy woofer from Kevin Haskins of Exodus Audio, TD6 and the old PE "Euro" series 7" woofer that itself is a cheap copy of the Scan Speak 18W/8535.

This thing is BEEFY!

Greg - www.phatplanetstudios.com

[TacoD]

Interesting, is the magnet assembly masking the complete backside of the cone?

[gbegland]

Interesting, is the magnet assembly masking the complete backside of the cone?

Yes, pretty much. If using more than one layer baffle or anything thicker than 3/4", you really need to make an aluminum mounting plate to let this thing breath some.

Worked ALL weekend, so no measurements yet, but I got the test box baffle cut out.

Greg

[gbegland]

mounted and ready to go....

Greg

[HareBrained]

Interesting. I can't imagine that you'd select those 3 for the same application. To me, each has unique strengths. If one meets the criteria for the speaker, the other 2 probably wouldn't. Still, I'm looking forward to what you come up with.

[gbegland]

Interesting. I can't imagine that you'd select those 3 for the same application. To me, each has unique strengths. If one meets the criteria for the speaker, the other 2 probably wouldn't. Still, I'm looking forward to what you come up with.

Not using any myself at the moment. That photo was just for comparisons sake.

Greg

[gbegland]

OK, here are some curves. Taken @ 3 inches from the phase plug. Top 5 lines are from 0 to 40 degrees horizontal. Next 2 down are with filtering. Bottom 2 lines are with EQ applied. I have a discussion over at the AE forum about the dip going on there around 900Hz.

Subjectively this thing sounds CLEAN and can be listened to fullrange without getting fatiguing. Only other drivers I've had through here that I could tolerate fullrange are the 15W revelator series and the old ascendent audio poly 6.5.

A little EQ with the DSP brings the dip right up, so for an active solution, it still looks manageable, but for passive, I'm not sure. Some of you crossover experts on here might have some fun with it.

Greg

[gbegland]

Some distortion sweeps for you. Taken at the same 3 inches @ 95dBspl.

[NyxOne]

OK, here are some curves. Taken @ 3 inches from the phase plug. Top 5 lines are from 0 to 40 degrees horizontal. Next 2 down are with filtering. Bottom 2 lines are with EQ applied. I have a discussion over at the AE forum about the dip going on there around 900Hz.

Subjectively this thing sounds CLEAN and can be listened to fullrange without getting fatiguing. Only other drivers I've had through here that I could tolerate fullrange are the 15W revelator series and the old ascendent audio poly 6.5.

A little EQ with the DSP brings the dip right up, so for an active solution, it still looks manageable, but for passive, I'm not sure. Some of you crossover experts on here might have some fun with it.

Greg

Humm... that's one big dip (8db)!

I wonder what might be causing this ? Did you chamfered the backside of the baffle for the driver to breath properly ?

Thanks for sharing BTW!

Chuck

[gbegland]

Humm... that's one big dip (8db)!

I wonder what might be causing this ? Did you chamfered the backside of the baffle for the driver to breath properly ?

Thanks for sharing BTW!

Chuck

Yes, as much as possible given the size of the thing. Would be curious to see how is does on say an 1/8" thick piece of aluminum. The guy I borrowed it from will possibly doing this for his monitor. I'll let you know how it turns out.

Greg

[EdL]

Td6m

Greets, Any further info wrg to the response dip in the AE TD6M? I'm looking for an OB mid-bass under a G3Si.

[gbegland]

Greets, Any further info wrg to the response dip in the AE TD6M? I'm looking for an OB mid-bass under a G3Si.

No. I followed along on AE's forum for a while, but since I was personally not using them, I stopped checking.

Greg

[davey_m]

I also followed the issue on AE's forum as I was interested in that driver too. It seems it was never satisfactorily resolved, so I lost interest. I remember AE stating that the dip was a measurement artifact but I doubted that, since there was a corresponding wriggle on the impedance measurement.

[gbegland]

I also followed the issue on AE's forum as I was interested in that driver too. It seems it was never satisfactorily resolved, so I lost interest. I remember AE stating that the dip was a measurement artifact but I doubted that, since there was a corresponding wriggle on the impedance measurement.

Correct. Once I showed other measurement in the same test box with different drivers and no trace of the dip, that ended that line of reasoning. I still wonder if the magnet is sooooo large that there is some type of reflection and cancellation going on there. Shame cause the thing sounded great...

Greg