Another 416 Project

[Mustang Marvin]

I want to build cabinets for a 416/399/805 configuration. I would like to cross at 800HZ. I read in other threads the 399 may be too much for a single 416. I can consider a double 416 config but If I do I would like to place them vertically. I can't seem to find a set up like this anywhere though.

Any thoughts or comments would be greatly appreciated.

[bfish]

At 110dB w/m, the 399 would need five 416s (97dB) per side to ~solve that problem acoustically, assuming no horn loading for the 416s. With a single, you'll need to attenuate the 399 ~13dB, which is easily done in an XO. Giving up sensitivity means giving up headroom though, so it's the old "which compromise suits me best' dilemna.

Since your project closely parallels AB's thread, it may not (or may) get much play until the dust has settled there...

Added:
You might want to dig up member Stephane Rame's (hope I spelled that right) 399/416 project in the meantime.

[Earl K]

Stephanes' thread documenting his adventures in using a single GPA 515 matched up to a GPA 399 is here ( over at LHF ) ! .

( I can't seem to locate his Hostboard contributions .)

Ah ,,, here he is ( stéphane Rame ) .

<> cheers

[Mustang Marvin]

I was thinking of a similar design, but with the 399 mounted on top A7 style using a 805 wooden horn.

So is the 399 too much for the 416?

I hope not. Much invested in components...

[Earl K]

So is the 399 too much for the 416?

I hope not. Much invested in components...

- IME, one would only hear a mismatch ( in the dynamics ) if you biamped and didn't add any resistive padding onto the horn driver . This sort of setup will sound "over-articulated" ( for HiFi ) no matter how you balance the actual driver to woofer volumes ( it would be fine for SR work ).

- IOW, if you can go passive ( and therefore use a passive pad for balancing the horn volume ) the end result ought to sound pretty balanced ( dynamically ) .

- You could also biamp as long as you "dumb-down" the dynamics of the horn diver with an appropriate resistive pad ( to first balance out the two components different sensitivities ) .

- The amount of padding necessary to add onto the horn driver is determined by the sensitivity of the woofer ( as bfish said ) .


cheers


PS; ( FWIW ) apparently it's not a generally accepted principal that resistive padding will lower the dynamics of a driver . Therefore you'll simply need to try out this approach to see if it helps give you a more homogeneous end-result .

[Panomaniac]

I don't understand the "Too Much" concept expressed here or in other threads.

You gotta turn down the horn no matter what. That's just how it works. Unless you are using 5 or 6 woofers, as noted above.

So your are either attenuating thru an L-Pad, series resistor, gain control in an active set-up or a combo of the above. The horn will always receive a lower voltage than the woofer so that the levels match. The reduction of voltage (and thus power) going to the horn is part & parcel of any system. That's 1/2 of what a crossover does.

[stéphane Rame]

Hi,
My system GPA 515-8G and 399-8A
My system GPA 515-8G, 399-8A and MRII564 - Hostboard

St?phane

[bfish]

Thanks Stephane. Sorry about my mistake in saying 416s/// I hate getting old...

MM, if it's any comfort, I don't know of any woofer that'll keep up with a 399. For that matter, it's a fairly short list of those that will keep up with a 416.

[Mustang Marvin]

The cab I have in mind is based on a 846 foot print, but raised in hight to 36in. This gives me about the 8 cf recommended for the 416 in a bass reflex configuration.

I'll put it together and if I'm not satisfied I'll go with a 902 and 511. I use the 902 in my 846 Val's and like the improvement over the 806.

This is my first attempt using the 399 and an 805 wood horn, so I am curious as the the sound. I still need to find an appropriate xo. All components in the new system are 16 ohm. I will be driving them with my MC 240.

This project is going to take awhile since I just moved to Alabama and all my gear is still packed. I'm getting tired of listening to the painters BOOM BOX. :lol:

[bfish]

Sounds good. I suspect you'll really like the 399/805 combo.

'Bama's a lonnnng ways from Oh-high-oh ain't it.

(survival tip: never use the phrase "that ain't how we did it back up North", and you'll do just fine)