My Adire Audio Tumult-15 based subwoofer

[Karoliina]

Hello,

I made the subwoofer last summer.
Here is a link with some info and two construction pictures (no final pictures yet, sorry). If you are interested, feel free to have a look at:

http://www.karoliinasalminen.com/blog/?page_id=47

Works quite well allthough my T-Amp 1400 is underpowered (only 2x700W to 4 ohms).

Best Regards,
Karoliina Salminen

[Cordraconis]

Originally posted by Karoliina
underpowered (only 2x700W to 4 ohms).

*gulp*




I saw the driver ... I *have* to order one of those ... someday.


Where did you order it? I hope somewhere in Europe, as I don't like to use a credit card for overseas shipping.

Great work!

[Notax]

Originally posted by Karoliina
Hello,

I made the subwoofer last summer.
Here is a link with some info and two construction pictures (no final pictures yet, sorry). If you are interested, feel free to have a look at:

http://www.karoliinasalminen.com/blog/?page_id=47

Works quite well allthough my T-Amp 1400 is underpowered (only 2x700W to 4 ohms).

Best Regards,
Karoliina Salminen

Most important question is where are your neighbours ?

[Karoliina]

Neighbours don't propably hear it inside. It is possible to hear the rumble on intense parts of movies from their garden I guess. Anyway, I am not watching movies all the time, so that shouldn't be that much a problem.. The SPL I get is quite insufficient and the amplifier clips in intense parts of movies (and it does not sound good). The Tumult is quite insensitive and requires a lot of power to drive it. I have always wondered how some people say how well they drive their subs with some 100 W amp - there is no way to reach theatrical levels with that kind of power, kilowats of power is really required at the lowest bass.

It is interesting how much current is in the speaker cables btw, I got once already a electrical shock from the speaker cables. Was bad feeling enough to learn to not touch the cables again when the amplifier is on...

[buggsson]

Originally posted by Cordraconis
Where did you order it? I hope somewhere in Europe, as I don't like to use a credit card for overseas shipping.

I cannot see your worries. I have been ordering since 1995 and never had any problems. The proportion of people that do get problems are microscopic. However, if something happens, and you have the right company for your card, they take care of things for you.

If you go to Adires homepage, for europe there are these options:

AUSTRIA

Lautsprecherbau Wagner
Oberkogl 8
94113 Tiefenbach
GERMANY
PHONE: 0049 8509 934771
FAX: 0049 8509 934772
E-MAIL: awagner@ls-wagner.de
WEB: http://www.ls-wagner.de
GERMANY

Lautsprecherbau Wagner
Oberkogl 8
94113 Tiefenbach
GERMANY
PHONE: 0049 8509 934771
FAX: 0049 8509 934772
E-MAIL: awagner@ls-wagner.de
WEB: http://www.ls-wagner.de
SWITZERLAND

Lautsprecherbau Wagner
Oberkogl 8
94113 Tiefenbach
GERMANY
PHONE: 0049 8509 934771
FAX: 0049 8509 934772
E-MAIL: awagner@ls-wagner.de
WEB: http://www.ls-wagner.de

[Karoliina]

My Tumult came from Sweden. I don't remember right away the company name. Adire Audio might know it because it is one of their resellers.

About credit card orders: I wouldn't worry about that with trusted sellers. I buy majority of things with credit card online and have never had any problems. I couldn't live without credit cards anymore...

[Notax]

Originally posted by Karoliina
Neighbours don't propably hear it inside. It is possible to hear the rumble on intense parts of movies from their garden I guess. Anyway, I am not watching movies all the time, so that shouldn't be that much a problem.. The SPL I get is quite insufficient and the amplifier clips in intense parts of movies (and it does not sound good). The Tumult is quite insensitive and requires a lot of power to drive it. I have always wondered how some people say how well they drive their subs with some 100 W amp - there is no way to reach theatrical levels with that kind of power, kilowats of power is really required at the lowest bass.

It is interesting how much current is in the speaker cables btw, I got once already a electrical shock from the speaker cables. Was bad feeling enough to learn to not touch the cables again when the amplifier is on...

Just joked for the neighbours. I live in a building.

I agree for a kW, for subwoofers of that kind. Mms=270 gr, BL=19,4 N/A, Xmax +/- 30 mm etc.

How you went to 130 liter for that 15" bass? If you calculate with T/S parameters, for Vas=263 l and Qts=0,41 result is Vb=260-270 l and Fb=16-17 Hz.


If subwoofer have nominal 4 Ohm, it can be 3 Ohm at lowest. 10 Amper current at 3 Ohm is 30 V and 300 W. Problem is very low frequncy of that current, too.

[Karoliina]

Was based on the recommendation of Dan Wiggins:

The original discussion is here:
http://www.diyaudio.com/forums/showt...181#post375181

Also if you calculate the SBB4 alignment for Adire Audio Tumult 15D2, that is exactly what you'll get (130 l, 16 Hz). With 260 liter box, you would get just 2 dB more output while doubling the size of the box and having more group delay at 20 Hz. I am not so sure doubling the size would worth it especially taking in account that it can be compensated with a more powerful amplifier (because the driver can handle that).

My driver is not the Tumult-15D4 (your Qts value was from that one).

[Notax]

Originally posted by Karoliina
Was based on the recommendation of Dan Wiggins:

The original discussion is here:
http://www.diyaudio.com/forums/showt...181#post375181

Also if you calculate the SBB4 alignment for Adire Audio Tumult 15D2, that is exactly what you'll get (130 l, 16 Hz). With 260 liter box, you would get just 2 dB more output while doubling the size of the box and having more group delay at 20 Hz. I am not so sure doubling the size would worth it especially taking in account that it can be compensated with a more powerful amplifier (because the driver can handle that).

My driver is not the Tumult-15D4 (your Qts value was from that one).

Did you do your electrical measurements of the unit, or use T/S parameters from data sheet for calculating Vb?

[Karoliina]

Hello,

No I haven't done measurements for the driver other than the Re which verifies that it is D2 and not D4 unit.
Why should I if the driver functions well in the enclosure where it is now.

Specs:
http://www.adireaudio.com/Home/TumultSeries.htm

My driver Tumult 15D2:
Qts = 0.35
Fs = 16 Hz
Vas = 263 liters

I currently run the voice coils in series.

Best Regards,
Karoliina