Is there interest in a large three way "monkey coffin" collaboration?

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

No criteria for sealed. My plan now is ST305 vented in 100L Fb30 (could tune lower to compensate for room gain by giving a gentle rolloff). But I'm definitely in favor of vented. The 15" drivers all just need too much volume vented or are low efficiency and 4 ohm.al

Currently I favor

ST305 vented
Faital 6Fe100
Vifa DX25

That is like $326 for drivers. Sadly the tweeter is out of stock for the next 3 weeks. However I am ready to order drivers today.

Does anyone have any major qualms with those choices? Or said more clearly, I am settled on the woofer I think but what are people's opinions on the mid and tweeter. I know the mid isn't round but I am thinking that rearmounting with a roundover will be a good workaround.

I see a criteria of the system being sealed......is there a specific reason that sealed is preferred over ported? Clearly it's understood the ported system will have better bass response and power handling and can sound just as good as sealed if executed properly. With a 42" tall enclosure, there's more than enough volume for tuning.

[nikkoluvr]

Re: Is there interest in a large three way "monkey coffin" collaboration?

sweet! I've been wondering what to do with my pair of ST305's and the pair of DX25's out of my old PI2's!
looks like a very fun build.
nikkoluvr

[kirk78h]

Re: Is there interest in a large three way "monkey coffin" collaboration?

Watching the collaborative effort in this thread has been fun and educational. From a (very) newbie perspective, it seems this is coming fairly close in design to the 'Rockin it Old School' project in the showcase (with a smaller, less expensive midrange). How will these two compare -- advantages / disadvantages?

[andy19191]

Re: Is there interest in a large three way "monkey coffin" collaboration?

Watching the collaborative effort in this thread has been fun and educational. From a (very) newbie perspective, it seems this is coming fairly close in design to the 'Rockin it Old School' project in the showcase (with a smaller, less expensive midrange). How will these two compare -- advantages / disadvantages?

That is a good find. Looks like some good information there on what to do and perhaps what not to do. There was/is something of a split between a big monitor like the "Rockin it Old School" and a larger tower floor standing speaker.

[thekorvers]

Re: Is there interest in a large three way "monkey coffin" collaboration?

Has anyone looked at these as Mid contenders?:

http://www.parts-express.com/prv-audio-6mb200-6-1-2-midbass-speaker-8-ohm--294-2700

[jhollander]

Re: Is there interest in a large three way "monkey coffin" collaboration?

The ST305 looks like 88.5- 89 db at 500 Hz. You skipped over some popular TBs.

[JasonP]

Re: Is there interest in a large three way "monkey coffin" collaboration?

The ST305 looks like 88.5- 89 db at 500 Hz. You skipped over some popular TBs.

Agreed. This looks nice: http://www.parts-express.com/tang-ba...eaker--264-914
Underhung voice coil too, should be a nice midrange.

Nothing wrong with that Faital though, specs look good.

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

That looks like it would do a good job. Has anyone tried it out. Nice smooth response but makes me wonder a little how much smoothing is applied.

If that response is for real it would be pretty amazing. No breakup at all really. Good price too.

Has anyone looked at these as Mid contenders?:

http://www.parts-express.com/prv-aud...-ohm--294-2700

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

DP

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

Yeah, I know. If folks here with experience feel like an 88 or 89 db mid will be adequate then I think that opens up the field a lot. TB would have several options.

The ST305 looks like 88.5- 89 db at 500 Hz. You skipped over some popular TBs.

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

That is super cool looking. If the FR plot from TB is for real it should be a dream for crossover work. Do they have a 5" that has a little more power handling? I mean it seems a shame to pair a mid capable of 102 db or so at it's rated power input with a woofer that can do 9 or 10 db more. Perhaps I am going wrong here with this concern...

Agreed. This looks nice: http://www.parts-express.com/tang-ba...eaker--264-914
Underhung voice coil too, should be a nice midrange.

Nothing wrong with that Faital though, specs look good.

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

I hadn't even noticed those. The projects are kind of similar in overall concept but as Andy noted the form factor will be a fair bit different. I also think it is usually a pretty tough sell to cross an 8" midrange above 3k as that design does. I would like to have this crossover voiced in a hi-fi way...perhaps with a little bbc dip..I'm not sure about voicing choices but hope that someone here will help with the crossover simulations and then will be happy to ship it to someone for final voicing...

Watching the collaborative effort in this thread has been fun and educational. From a (very) newbie perspective, it seems this is coming fairly close in design to the 'Rockin it Old School' project in the showcase (with a smaller, less expensive midrange). How will these two compare -- advantages / disadvantages?

[Mayhem13]

Re: Is there interest in a large three way "monkey coffin" collaboration?

Yeah, I know. If folks here with experience feel like an 88 or 89 db mid will be adequate then I think that opens up the field a lot. TB would have several options.

I would only add that the old three ways from Pioneer, Sansui, Scott, etc were pretty efficient systems. They were tuned higher for midbass slam and we're very impressive with classic rock and pop of the era.

Me, personally........my take for something like this is go big or go home......and that includes efficiency and bass extension. I'm happy with the DX25. It's an awesome tweeter at a great price if used correctly. Use it in a small waveguide and you can do LR2 at 1.8khz. That would allow for a nice directivity match to a 6" mid.

My next feeling would be coated paper or poly for the drivers........and particularly the midrange......a smooth rolloff on both ends. If used in the proper sized chamber, a second order high pass electrical wouldn't need much keeping down costs and retaining efficiency. With a low XO to the tweeter, the usual cone breakup found in these size mids wouldn't need any further work as they'd be low enough to not be an issue. Didn't review the Faital mid so I'm not sure what's the story there. I DO know the B&C 6md38 really well and it's an incredible midrange, ......unsurpassed in its price point IMO.

For a big tower type system, if the choice was limited to no larger than 12", I'd skip it all together and go with a pair of 8's. For the money, more motor strength, deep extension, efficiency and power handling. A win win all around if the system is gonna be 42" tall anyways.

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

I'd happily go with a 15". Personally I have a bias in favor of the 12" or 15" over smaller drivers even if it makes sense in terms of extension etc. To be sure a pair of 8" wouldn't give up too much in terms of Vd or extension.

I'm still open to the DC380 for this. It will gain a little sensitivity and give up some overall output capability.

The only problem with the B&C is the price but they look really great. I'm listening to a pair of B&C 15BG100 right now. They would kick tail for this project...I have them tuned to 21 hz and the sensitivity is about 91db. They just cost like $336. In what sort of context have you used the B&C mid?

I agree that we should get sensitivity as much as possible here but I think there is a lot more LF content at lower frequencies in more modern music than there was 30 yrs ago. To that end I think it is nice to have better extension while still maintaining decent sensitivity.

Anyway....

I would only add that the old three ways from Pioneer, Sansui, Scott, etc were pretty efficient systems. They were tuned higher for midbass slam and we're very impressive with classic rock and pop of the era.

Me, personally........my take for something like this is go big or go home......and that includes efficiency and bass extension. I'm happy with the DX25. It's an awesome tweeter at a great price if used correctly. Use it in a small waveguide and you can do LR2 at 1.8khz. That would allow for a nice directivity match to a 6" mid.

My next feeling would be coated paper or poly for the drivers........and particularly the midrange......a smooth rolloff on both ends. If used in the proper sized chamber, a second order high pass electrical wouldn't need much keeping down costs and retaining efficiency. With a low XO to the tweeter, the usual cone breakup found in these size mids wouldn't need any further work as they'd be low enough to not be an issue. Didn't review the Faital mid so I'm not sure what's the story there. I DO know the B&C 6md38 really well and it's an incredible midrange, ......unsurpassed in its price point IMO.

For a big tower type system, if the choice was limited to no larger than 12", I'd skip it all together and go with a pair of 8's. For the money, more motor strength, deep extension, efficiency and power handling. A win win all around if the system is gonna be 42" tall anyways.

[Mayhem13]

Re: Is there interest in a large three way "monkey coffin" collaboration?

Agreed on bass extension.......always low as you can go!

I've used the BC as a dedicated mid only in several projects crossed as low as 1.4khz and as high as 3.5khz where it begins to beam a bit. It's low pass sweet spot for me has been 250hz.