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Author Topic: Sound Physics Lab TD-1  (Read 1074 times)

Bobby Gonzales

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Sound Physics Lab TD-1
« on: June 07, 2021, 02:02:11 PM »

Hi everyone, I just picked up 6 TD-1 cabinets. I would like to tri amp them but I can't find any information on the crossover points. Does anyone have the manual or know?
I cant find the manual anywhere.

THANK YOU
« Last Edit: June 07, 2021, 02:16:31 PM by Bobby G »
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Russell Ault

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Re: Sound Physics Lab TD-1
« Reply #1 on: June 07, 2021, 04:01:54 PM »

{...}

Hi Bobby!

To post on these forums you'll need to set your Display Name to be your full, real name. If you change it quickly you might beat the mod that's inevitably coming to lock this thread.

(Also, just because it isn't sticky-ed anywhere, please be advised that e-mail notifications don't work.)

-Russ
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Russell Ault

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Re: Sound Physics Lab TD-1
« Reply #2 on: June 08, 2021, 12:03:46 AM »

Hi everyone, I just picked up 6 TD-1 cabinets. I would like to tri amp them but I can't find any information on the crossover points. Does anyone have the manual or know?
I cant find the manual anywhere.

THANK YOU

Well, after about 15 minutes of searching I wasn't even able to find a PDF of the spec sheet, which I'm almost impressed by. Hopefully someone has some paperwork still lying around somewhere.

-Russ
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Riley Casey

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Re: Sound Physics Lab TD-1
« Reply #3 on: June 08, 2021, 09:39:43 AM »

drew gandy

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Re: Sound Physics Lab TD-1
« Reply #4 on: June 19, 2021, 06:16:54 PM »

Hi everyone, I just picked up 6 TD-1 cabinets. I would like to tri amp them but I can't find any information on the crossover points. Does anyone have the manual or know?
I cant find the manual anywhere.

THANK YOU

These types of designs aren't just about simple crossover frequency numbers. The crossover from the compression driver to the mids is particularly important. But if you want simple numbers they are roughly 300Hz and 1.3Khz. Yes, that's a low crossover frequency for a 1" compression driver! 

Documentation for these was pretty slim even when new. I have some and I hope to upload a few different things in the coming weeks. But of course, that other thread that Nathan did had a lot of info. He did some significant leg work both in research AND cleaning up his boxen. Hopefully he reaped some benefits for it.
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Nathan Riddle

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Re: Sound Physics Lab TD-1
« Reply #5 on: June 19, 2021, 08:00:42 PM »

These types of designs aren't just about simple crossover frequency numbers. The crossover from the compression driver to the mids is particularly important. But if you want simple numbers they are roughly 300Hz and 1.3Khz. Yes, that's a low crossover frequency for a 1" compression driver! 

Documentation for these was pretty slim even when new. I have some and I hope to upload a few different things in the coming weeks. But of course, that other thread that Nathan did had a lot of info. He did some significant leg work both in research AND cleaning up his boxen. Hopefully he reaped some benefits for it.

I love mine :)

Thanks for the help!

I meant that thread I started to be a culmination of all the various resources on them.

Bobby, as I said in my PM, there isnt a huge benefit to tri-amping them.

The passive xover with the 50w resistor upgrade will handle as much power as you can send them.

I power mine off a DNA20K4 and because of their very high impedance theres still not enough voltage swing to make them distort audibly.

I suppose you could get 2dB more out of them, but the effort isn't worth it IMO.

One 12g cable vs a NL8 seems 10x easier and lighter...

If you wanted some improvement try bi-amping them.

Woofers might take a bit more if you swapped for modern neo drivers...
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Ivan Beaver

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Re: Sound Physics Lab TD-1
« Reply #6 on: June 29, 2021, 08:24:10 AM »



Woofers might take a bit more if you swapped for modern neo drivers...
The original woofers were custom units, that were shallower than normal.  This was before the days of neo being used a lot.

BE SURE to check the fit of the clearance of the woofers, it can be a bit close.
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Doug Fowler

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Re: Sound Physics Lab TD-1
« Reply #7 on: June 29, 2021, 12:56:47 PM »

The original woofers were custom units, that were shallower than normal.  This was before the days of neo being used a lot.

BE SURE to check the fit of the clearance of the woofers, it can be a bit close.

MacPherson Monolith used super-shallow JBL 18s.  It's not exactly a line array but they were good sounding boxes.  Availability of that custom woof makes ownership nowadays a bit risky.
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Bobby Gonzales

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Re: Sound Physics Lab TD-1
« Reply #8 on: July 05, 2021, 10:54:26 PM »

Thank you guys for the responses. I've done some testing and decided to Bi amp them. I liked the response response I was getting in the 150hz-300hz range compare paired to using the passive crossover.
I picked up another pair of TD-1s this weekend and it was their touring edition. It had some helpful information on the back.
Here is a Picture
https://u.cubeupload.com/Rmgonzales/20210605164344.jpg
« Last Edit: July 05, 2021, 10:59:34 PM by Bobby Gonzales »
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Nathan Riddle

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Re: Sound Physics Lab TD-1
« Reply #9 on: July 06, 2021, 03:58:30 PM »

Thank you guys for the responses. I've done some testing and decided to Bi amp them. I liked the response response I was getting in the 150hz-300hz range compare paired to using the passive crossover.
I picked up another pair of TD-1s this weekend and it was their touring edition. It had some helpful information on the back.
Here is a Picture
https://u.cubeupload.com/Rmgonzales/20210605164344.jpg

That touring model is schweet looking! Surprising they allowed 3-way power hookups!

Where are you finding all these TD1's? I've wanted a second pair for years now...

Passive EQ would be the same for 150-300hz as bi-amp since xover is roughly 300hz.

Did you look at my captures?
How do yours compare?
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ProSoundWeb Community

Re: Sound Physics Lab TD-1
« Reply #9 on: July 06, 2021, 03:58:30 PM »


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