416A

[CombatWombat]

I have a 416A speaker that I got from my church. I don't know much about it except it is a 16 ohm 15" speaker. I made a ported cabinet for it to use for bass guitar. I just guessed on the dimensions because I had no specifications. What are the specs on this speaker? What kind of box would I put it in to use as a subwoofer? thanks

[Steve Burger]

I would not recommend it for using with bass guitar. If you want ALTEC a 421 would be more suited for that purpose.

[Fitts]

Hi Combat,

What size cabinet did you make? And the port, how big is it?

[Fitts]

I did some calculations for you based on the size of the cabinet you built. The best speaker for your cabinet would be the Altec 421-8H. Other choices for your cabinet would be an EVM-15B and the JBL 2205 or E140. All these have parameters that appear to work best in a ported box of just a bit under 4 cubic feet.

I think the 416 should be in a box nearly 10 cubic foot in size. The T/S parameters of the 416 that I used were Fs of 24 hz Qts of .25 and Vas of 22.7 Cu. Ft.

[CombatWombat]

Was that the 416A? because those specs are nearly identical to the 416 8C. How much difference is there between the 416s? thanks

[CombatWombat]

Yes it might not be best suited for bass guitar, but I got it for free. What is it designed for? How much is it worth? I have it in a 19"x21"x16" (interior) box so 3.7 cubic ft It has two 3"x4" vents. Does anyone have specifications for this speaker?

[Fitts]

The T/S list I got from the unofficial Altec website doesn't have a 416 with an A suffix. You are correct to note that the specs I used were 416-8C. Maybe someone else can help find the exact specs. I suspect they are not different from the 416-8C.

If you have an exact set of specs for the 416A and they differ a lot from the 416-8C you can calculate the size yourself. The optimum vented box volume is equal to 15 times the Vas parameter times the Qts parameter raised to the 2.87 power.

V=15*Vas*(Qts)^2.87

[CombatWombat]

thanks

[Steve Burger]

I sent you an email regarding this but am not sure if you got it. I have a 421 I would swap for the 416. Although the 416 if in good shape is probably worth $25 to $50 more, the 421 would be much more desirable in that application.