91dB Sensitivity and 114dB Max from a Pair of 2in Drivers?

[xrk971]

Smooth response but 86dB and 1mm Xmax according to the datasheet.

https://www.farnell.com/datasheets/2329961.pdf

 

[ChrisABC]

from the Alderwood pdf it says,
Maximum cone excursion 5.5mm (?)
Moving mass 1.2 gram
Magnet assembly High Temp Neodymium - copper shorting ring

I look at manufacturer specs and think where are they stretching the truth? or what can they not change?
One thing they can't change would be the Moving Mass (maybe)

Some other drivers to look at:

Moving Mass 1.15 gm, TPR Surround, neodymium Tang Band w2 748
https://solen.ca/wp-content/uploads/w2748sg.pdf
Rubber Surround, moving mass 1.4 gm (fr looks terrible) Lavoce

https://www.parts-express.com/pedocs/specs/293-703--lavoce-fsn020.72-specifications.pdf

TPR Surround- Thermo-Plastic rubber surround
https://dynavox.com/6.5inch-20-oz-8-ohm-TPR-Surround-1inch-4L-VC-PP-Woofer
Finding the drivers in the Hydra is proving to be difficult.

 

[pelanj]

Here are some interesting coaxial speakers https://www.thomann.de/intl/the_box...LCJjdXJyZW5jeSI6NywibGFuZ3VhZ2UiOjJ9&reload=1

They say 102 dB/W sensitivity (I really doubt that). The used driver is also for sale https://www.thomann.de/intl/the_box_pro_4_coax_speaker_mcx4.htm

I wonder how these would compare to the Hydra clone, which I finally sanded and started spraying today. Actually I am thinking really about buying a pair for summer outdoor barbecues.

 

[pelanj]

By the way, the Hydra clones with 3FE22s are really great.

 

[tiverson]

Hi X,

My 2 cents. Actually what you need is only 8ohm 85db driver. 2 of that will give 91db. I guess the pro drivers is more likely the case. The 5mm excursion might be more x-mech.

Maybe something like this....

Eminence Alpha 2-8 speaker. The Eminence Alpha 2-8 is a 2" 8 ohm fullrange speaker. Alpha-2-8 is a 20 watt RMS 2" full range speaker.

If I were to do something like this I would have used 4x3Fe22 16 ohm to achieve sensitivity of 100db/watt.

My 2 cents.

Oon

I put a pair of those Alphas in a Mini Back loaded Horns that I 3d printed for them.

 

[xrk971]

Hi tiverson,

Very nice work - that’s a huge print! How long did it take you?

Is the print file something you will share! Live the sound. Great stuff.

Happy new year everyone!

 

[tiverson]

Hi tiverson,

Very nice work - that’s a huge print! How long did it take you?

Is the print file something you will share! Live the sound. Great stuff.

Happy new year everyone!

thanks and happy new year to you, it was a big file and took over 3 days to print one. the horn is over 2 feet long. my build plate is 400 mm x 400 x 450. I designed it to fit with in the space. here is move views of it.