Anonymous
Anonymous asked in Consumer ElectronicsOther - Electronics · 2 months ago

# 3-way speaker impedance confusion  ?

I have some drivers gathering dust so i want to make a 3 way speaker, the tweeter is 6 ohm, mid range is 4 ohm and woofer is 8 ohms. I used a calculator to generate a crossover (i will do the math on my own once i have a grasp), but the calculator doesn't show the total ohms? my amp works at either 4 or 8 ohms. How can i work out the total ohms? also what would happen if i bridge the amp with this 3-way speaker?, Here is the generated crossover

4th Order Normal Polarity

2000 Hertz / 250 Hertz

6 Ohm Tweeter / 4 Ohm Mid / 8 Ohm Woofer

2.84 db Bandpass Gain, Spread = 8 : 3 octaves

Parts List

Capacitors

C1 = 7.08 uF

C2 = 14.04 uF

C3 = 133.43 uF

C4 = 188.51 uF

C5 = 28.25 uF

C6 = 6.29 uF

C7 = 125.75 uF

C8 = 28.45 uF

Inductors

L1 = 0.3 mH

L2 = 1.34 mH

L3 = 1.26 mH

L4 = 7.2 mH

L5 = 0.59 mH

L6 = 0.28 mH

L7 = 9.55 mH

L8 = 4.81 mH

Relevance
• 1 month ago

Most manufactured speakers contain drivers

that all have the same nominal impedance.

When their impedances are unequal, calculations ---

and crossover design --- become monumentally difficult.

Full laboratory measurement is the best method,

as it will give an impedance curve rather than just a fixed-frequency value.

A really (really really) well-equipped repair shop may be able to do that for you.

Otherwise, use an amplifier that is well known for handling low-impedance

loads with ease so you don't have to be concerned about it.

• khalil
Lv 7
1 month ago

either 4 or 8 ohms is not acceptable ... which one?

you may desin filters with different input output impedances.

study about chebyshev (0.1db) filters design

https://web.njit.edu/~gilhc/EE494/tutorial.htm

• Tony B
Lv 4
2 months ago

I can't answer this  but I'd suggest you re-post in “Consumer Electronics”, I guess someone there can help.