Best 15inch/38cm woofer units?

[thin bLue]

With

High BlieSMa T34B-4

BlieSMa T34B-4 Beryllium Dome Tweeter | HiFiCompass

What is on the test bench? In February, 2018 we tested the first BlieSMa (Germany) product - aluminium-magnesium 34 mm dome tweeter T34A-4. And so, three months later it's new product is on the our test bench - beryllium 34 mm dome tweeter T34B-4. By its construction the new tweeter is exactly...

hificompass.com

Mid BlieSMa M74B-6

https://www.diymobileaudio.com/threads/bliesma-m74b-6-beryllium-dome-midrange.443888/

Low Purifi PTT8.0X04-NAB-01

PTT8.0X04-NAB-01 - PURIFI

Negligible Force Factor Modulation and Surround Radiation Distortion Low Magnetic Hysteresis Distortion “Real” long-stroke performance: distortion remains low over full excursion Uncompromised midrange performance Designed and Manufactured in Denmark KEY SPECIFICATIONS Driver size 8” DC...

purifi-audio.com

What kind of 15 inch units can be paired best?

Maybe Scan-speak 38WE/8582T00?

38WE/8582T00 – Scan-Speak A/S

www.scan-speak.dk

Any suggestions?

 

[sarumbear]

What is it that you ask? Your title and your post does not correlate.

 

[thin bLue]

What is it that you ask? Your title and your post does not correlate.

Sorry for confusing you.

I'm looking for a 15"/38cm woofer units that will provide the best bass response(Clean=Low THD, flat and extended) when matched with the units above.

 

[sarumbear]

Sorry for confusing you.

I'm looking for a 15"/38cm woofer units that will provide the best bass response(Clean=Low THD, flat and extended) when matched with the units above.

But one of the units you listed is a 15” driver?

 

[fieldcar]

When you say "matched" do you mean driven by a single amp with a 4-way passive crossover?

 

[AwesomeSauce2015]

Is this your first time designing / building a speaker? If so, I would not recommend trying to do a 4-way design. Build a simpler 2-way or 3-way. It's just easier to get right and you can get very good performance out of it for much less effort.
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Realistically, the LF response can have quite a few sins and still sound good. What's important is getting everything from about 150hz up right. Directivity, power handling, etc, all play into that.

What you'll probably want to do is build the speaker without that 15" woofer, then use separate subwoofers to get the deep bass [OR just build the woofers separately, and use an active crossover]. (Unless you are aiming for very high output, at which point you really shouldn't be using dome tweeters)
If you are aiming for the kind of output capacity where a 15" midbass woofer would be required, then you'll need horns to keep up... Although that tweeter seems to have good output capacity, I generally find that domes pushed hard don't sound good.
In that case, I would go for B&C Speakers' woofers as they seem to get universally good praise, and seem to have good performance on paper.

 

[thin bLue]

When you say "matched" do you mean driven by a single amp with a 4-way passive crossover?

My word "match" mean handling lower frequencies and crossover band well + no need of quite high midrange ability.

Both passive crossover with separate amps(fully separated Bi-amping circuit), active crossover are concerned as available option.

 

[thin bLue]

But one of the units you listed is a 15” driver?

I said "Maybe Scan-speak 38WE/8582T00?"

and "Any suggestions?"

I'm sorry if I wrote something that was too difficult to understand.

 

[morpheusX]

Assuming you're on USA, maybe AE TD15X/H versions?

Acoustic Elegance TD15X - Sealed or Vented Box Applications

The TD15H is a low distortion, high Xmax, wide bandwidth, bass driver designed for sealed or vented enclosure applications. The TDH drivers use a 4 layer flat wire copper coil and have the highest BL and also highest mass within the TD Series. This allows them to work in smaller vented...

aespeakers.com

 

[PatentLawyer]

Sorry for the drift and not meant as a criticism, just a genuine curiosity about your design. Given how the 74 mm midrange dome can play up to ~4K with good directivity, wondering why you chose the (relatively large) 34 mm dome tweeter?

 

[thin bLue]

Is this your first time designing / building a speaker? If so, I would not recommend trying to do a 4-way design. Build a simpler 2-way or 3-way. It's just easier to get right and you can get very good performance out of it for much less effort.
----------------------------------------------------------------------------------------------------
Realistically, the LF response can have quite a few sins and still sound good. What's important is getting everything from about 150hz up right. Directivity, power handling, etc, all play into that.

What you'll probably want to do is build the speaker without that 15" woofer, then use separate subwoofers to get the deep bass [OR just build the woofers separately, and use an active crossover]. (Unless you are aiming for very high output, at which point you really shouldn't be using dome tweeters)
If you are aiming for the kind of output capacity where a 15" midbass woofer would be required, then you'll need horns to keep up... Although that tweeter seems to have good output capacity, I generally find that domes pushed hard don't sound good.
In that case, I would go for B&C Speakers' woofers as they seem to get universally good praise, and seem to have good performance on paper.

Thanks for great advices for DIY

Of course, I'll use multiple subwoofers to cure in room responses.(Esp. below Schroeder Frequency.)

But big towers with big units make sexy-look aren't they? Acoustical gain maybe marginal, but psychologicaly.

 

[thin bLue]

Assuming you're on USA, maybe AE TD15X/H versions?

Acoustic Elegance TD15X - Sealed or Vented Box Applications

The TD15H is a low distortion, high Xmax, wide bandwidth, bass driver designed for sealed or vented enclosure applications. The TDH drivers use a 4 layer flat wire copper coil and have the highest BL and also highest mass within the TD Series. This allows them to work in smaller vented...

aespeakers.com

Wow, I'll look in to that! thank you!

 

[thin bLue]

Sorry for the drift and not meant as a criticism, just a genuine curiosity about your design. Given how the 74 mm midrange dome can play up to ~4K with good directivity, wondering why you chose the (relatively large) 34 mm dome tweeter?

T25 series also great option, but I can't listen Ultrasounds! xD
Of course, considering break-up in ultrasonic band what can be influence on audible frequency area, T25 would be definitely better option.

IMHO, T34B is still great HF driver with better looking(personal) and sensitivity.

 

[mightycicadalord]

B&C 15NDL88 has one of the smoothest responses I've seen on a 15 pa woofer.

 

[fieldcar]

Check out FaitalPro. I've been eyeing them up as the JBL 2216Nd is impossible to find for a potential JBL 4367 clone.

FaitalPRO - Loudspeaker Database

 

[thin bLue]

C 15NDL88 h

B&C 15NDL88 has one of the smoothest responses I've seen on a 15 pa woofer.

Looks great! look at that sensitivity!
But it seems targeted on little higher frequency range than I want.

 

[fieldcar]

little higher frequency range than I want.

 

[thin bLue]

Check out FaitalPro. I've been eyeing them up as the JBL 2216Nd is impossible to find for a potential JBL 4367 clone.

FaitalPRO - Loudspeaker Database

View attachment 210257

Thanks for nice looking info and suggestions!

 

[sarumbear]

I said "Maybe Scan-speak 38WE/8582T00?"

and "Any suggestions?"

I'm sorry if I wrote something that was too difficult to understand.

If your design is passive, sensitivity is the starting decision. As far as I can see the drivers you list do not match.

 

[thin bLue]

If your design is passive, sensitivity is the starting decision. As far as I can see the drivers you list do not match.

So what can you suggest?