Speedster TMM

[Mike220]

Re: Speedster TMM

Perhaps someone can answer this but If one was to build these in 3/4" stock should you increase the distance of all the driver locations down by 1/4" to make up for the wall thickness as well? I know this is pretty minor and i probably wouldn't hear the difference.

Also i found that the port center needs to be 3-1/2" upward from the internal bottom. So that would make it 4-1/4" from the bottom for 3/4 stock.
Thanks!

[Chris Roemer]

Re: Speedster TMM

Port doesn't matter (as long as you're not rear porting and pushing them up against a wall, obviously).

[Drewaudio]

Re: Speedster TMM

OK, I don't know how I missed that!

Any comment re port location?

Cheers, Andrew

[Mike220]

Re: Speedster TMM

All the info you need is here! Paul states that it's measures at about 6 ohms. The TMM combo appears to still drop to 4 ohms at the low end on the graphs.

http://meniscusaudio.com/images/Speedster%20TMM%20writeup.pdf

http://meniscusaudio.com/speedster-pair-p-1393.html

[Drewaudio]

Re: Speedster TMM

Hi, I've recently built the speedsters and am very impressed with their sound. I been reading the TMM thread and am tempted to try that design but I have a few questions first that I would appreciate your comments on:

1) what is the low frequency impedance for the TMM given that I've read that the W4-1720 measures higher than 4 ohms.
2) can the port be relocated to the rear? would that affect the sound?

Thank you for your help
Andrew (a first time speaker builder)

[Drewaudio]

Re: Speedster TMM

Hi, I've recently built the speedsters and am very impressed with their sound. I been reading the TMM thread and am tempted to try that design but I have a few questions first that I would appreciate your comments on:

1) what is the low frequency impedance for the TMM given that I've read that the W4-1720 measures higher than 4 ohms.
2) can the port be relocated to the rear? would that affect the sound?

Thank you for your help
Andrew (a first time speaker builder)

[Paul K.]

Re: Speedster TMM

I was really pleased the way these sound, especially since I won this pair of drivers as a door prize at an InDIYana event. Their bass reach is very satisfactory but with a single 5-inch driver, they won't play really loud without bottoming out (which happened at the InDIYana event several years ago). If you wanted to use them for really serious listening, they would benefit from having a small tweeter for the upper part of the highest octave, but for watching TV and casual music listening, they're perfectly good.
Paul

Wow - thank you so much. I have four of these guys I bought on close out; seems I know where they'll be going.

Again, thank you.

[Beau]

Re: Speedster TMM

The ML-TL cabinet I built for this project with the FR125, the Copper Tones, has internal dimensions of 5"W x 5"D x 39"H, and I used 1/2" thick MDF all around. The driver's center is located 6" below the internal top. There is horizontal slot port located at the bottom firing out the front above the base, and the port has dimensions of 0.75"H x 4"W x 2.5"L. The top 19" of the cabinet are stuffed with 4.5" of polyester fiber. I only took photos of the finished cabinet, but for bracing I used six 3/4" diameter hardwood dowels in 3 pairs with one dowel of each pair side-to-side and the other dowel front-to-back, with the pairs located at approximately 11" below the top, at 20" below the top, and at 8" above the bottom. The base was attached into the bottom of the cabinet with foam gasketing to seal the bottom. The modeled anechoic f3 was ~44 Hz. I've attached some photos.
Paul
[ATTACH=CONFIG]44095[/ATTACH][ATTACH=CONFIG]44096[/ATTACH]

Wow - thank you so much. I have four of these guys I bought on close out; seems I know where they'll be going.

Again, thank you.

[Paul K.]

Re: Speedster TMM

The ML-TL cabinet I built for this project with the FR125, the Copper Tones, has internal dimensions of 5"W x 5"D x 39"H, and I used 1/2" thick MDF all around. The driver's center is located 6" below the internal top. There is horizontal slot port located at the bottom firing out the front above the base, and the port has dimensions of 0.75"H x 4"W x 2.5"L. The top 19" of the cabinet are stuffed with 4.5" of polyester fiber. I only took photos of the finished cabinet, but for bracing I used six 3/4" diameter hardwood dowels in 3 pairs with one dowel of each pair side-to-side and the other dowel front-to-back, with the pairs located at approximately 11" below the top, at 20" below the top, and at 8" above the bottom. The base was attached into the bottom of the cabinet with foam gasketing to seal the bottom. The modeled anechoic f3 was ~44 Hz. I've attached some photos.
Paul

Yes; that is the same one I am thinking of.

Thanks very much.

[Beau]

Re: Speedster TMM

The driver is the CSSFR125SR, which I assume is the same. I got my project folder out for it to remind me to give you details about it tomorrow or the next day.
Paul

Yes; that is the same one I am thinking of.

Thanks very much.

[Paul K.]

Re: Speedster TMM

The driver is the CSSFR125SR, which I assume is the same. I got my project folder out for it to remind me to give you details about it tomorrow or the next day.
Paul

Are your ML-TL enclosures for the CSS FR125? If so, any chance you are willing to share the design?

[Beau]

Re: Speedster TMM

It's super you're really happy with the Speedster TMM and I'm glad I was able to contribute a bit to Paul Carmody's design. Truth be told I have a pair of full-range speakers in our master bedroom that have CSS 125-mm drivers in ML-TLs. They're used for our TV and are driven by an outboard power amp. They are a perfect combination with the TV.
Paul

Are your ML-TL enclosures for the CSS FR125? If so, any chance you are willing to share the design?

[Paul K.]

Re: Speedster TMM

It's super you're really happy with the Speedster TMM and I'm glad I was able to contribute a bit to Paul Carmody's design. Truth be told I have a pair of full-range speakers in our master bedroom that have CSS 125-mm drivers in ML-TLs. They're used for our TV and are driven by an outboard power amp. They are a perfect combination with the TV.
Paul

fwiler,

I would love to give you an impression, but I'm certainly not qualified for that. First I would need much more experience than what I have now. I have only listened to very few speakers and second my listening room is far from ideal, it is a wide open basement without any sound treatment. Thirdly: my previous speakers that I listened to for a long time are 'full range' speakers, so I guess my ears are used to that sound and the particular room arrangement that full range speakers require.

I can only tell you from a very personal perspective that these speakers are fun to build, and they are certainly a high quality speaker.
There is some magic in this speaker:
-the ribbon is phenomenal and sounds good right from the start. I did not have to 'get used to' the sound. My next build will have a ribbon without hesitation.
- Second piece of magic from the speakers is their bass reproduction. This is the first ML-TL speaker that I have listened to. It rocks! Paul K. certainly designed a nice cabinet. Coming from full range speakers I had to get used to this much bass. It's amazing.

I am very happy and enjoy the Speedster TMM's, I can certainly recommend them.
It has put the full range speakers in perspective. I still listen to them for certain pieces of music and they also do have their charm and strength for certain I'm not getting rid of them. The Speedster TMM's are a very nice option for me.

The proof is in the fact that my wife 'promoted' the Speedster TMM's to our living room to function as our AV speakers (despite the poor finish I put on the speakers). She also loved getting rid of the subwoofer.

Thank you very much to Paul C., Paul K and many others that make this hobby possible for noobs like myself. thank you all for sharing your experiences and helping me through the build process.

This is the first speaker but it won't be my last.

[nrg74]

Re: Speedster TMM

fwiler,

I would love to give you an impression, but I'm certainly not qualified for that. First I would need much more experience than what I have now. I have only listened to very few speakers and second my listening room is far from ideal, it is a wide open basement without any sound treatment. Thirdly: my previous speakers that I listened to for a long time are 'full range' speakers, so I guess my ears are used to that sound and the particular room arrangement that full range speakers require.

I can only tell you from a very personal perspective that these speakers are fun to build, and they are certainly a high quality speaker.
There is some magic in this speaker:
-the ribbon is phenomenal and sounds good right from the start. I did not have to 'get used to' the sound. My next build will have a ribbon without hesitation.
- Second piece of magic from the speakers is their bass reproduction. This is the first ML-TL speaker that I have listened to. It rocks! Paul K. certainly designed a nice cabinet. Coming from full range speakers I had to get used to this much bass. It's amazing.

I am very happy and enjoy the Speedster TMM's, I can certainly recommend them.
It has put the full range speakers in perspective. I still listen to them for certain pieces of music and they also do have their charm and strength for certain I'm not getting rid of them. The Speedster TMM's are a very nice option for me.

The proof is in the fact that my wife 'promoted' the Speedster TMM's to our living room to function as our AV speakers (despite the poor finish I put on the speakers). She also loved getting rid of the subwoofer.

Thank you very much to Paul C., Paul K and many others that make this hobby possible for noobs like myself. thank you all for sharing your experiences and helping me through the build process.

This is the first speaker but it won't be my last.

[fwiler]

Re: Speedster TMM

Good job. Please give us some more impressions after you've had some time listening to them.

I would love to hear that tweeter.