A true "series crossover" . . .

Posted by Brian H P (A) on September 29, 2014 at 10:50:23

In Reply to: RE: Series connection of drivers in hi-fi speakers? posted by jsch3 on September 29, 2014 at 06:27:26:

. . . such as that used in the linked speakers, is a whole different situation from the OP's speakers, which apparently have two midrange drivers wired in series and connected to the bandpass section of a more conventional parallel crossover.

The series crossover, in its simplest form, has the tweeter and midbass driver wired in series with each other, and the reactive components in parallel with the individual drivers: the inductor shunts across the tweeter, and the capacitor across the midbass. This yields a first-order electrical transfer function, similar to the more common situation of a cap in series with the tweeter, a coil in series with the woofer, and both legs of the circuit in parallel. Steeper orders may be achieved by adding appropriate additional components in series and parallel with this arrangement. The linked article provides a good comparison.

Series crossovers have been around for a very long time -- Bud Fried among others favored them, and Jeff Bagby used one in his Fried-inspired "Tributes" design -- but because of the increased interaction between highpass and lowpass components, and the way everything affects everything else, they are much more difficult to get right. Hence, perhaps, the small but enthusiastic cult following among some speaker designers.

Series vs. parallel crossovers (Open in New Window)

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Follow Ups Full Thread

Topic - Series connection of drivers in hi-fi speakers? - jackson 04:51:09 09/29/14 (24)

The updated version of my Horn Shoppe Horns uses a series x-over - 1973shovel 00:55:25 11/04/14 (0)

RE: Series connection of drivers in hi-fi speakers? - mrdavis842 12:49:24 10/30/14 (0)

RE: Series connection of drivers in hi-fi speakers? - Rod M 14:04:40 10/03/14 (0)

Series connection works fine - Duke 13:33:11 10/01/14 (1)

RE: Series connection works fine - Presto 09:59:44 10/02/14 (0)

DiAural crossover - Dave_K 09:15:15 09/30/14 (0)

RE: Series connection of drivers in hi-fi speakers? - BigguyinATL 07:07:56 09/30/14 (6)

WRONG and WRONG - Duke 22:46:01 09/30/14 (4)

RE: WRONG and WRONG - BigguyinATL 12:07:46 10/06/14 (1)

RE: WRONG and WRONG - Duke 15:45:42 10/06/14 (0)

Another Gedanken - manerac 15:44:09 10/01/14 (1)

RE: Another Gedanken - Presto 10:04:14 10/02/14 (0)

RE: Series connection of drivers in hi-fi speakers? - manerac 11:43:21 09/30/14 (0)

Actually - E-Stat 13:55:26 09/29/14 (5)

RE: The Bose 901 uses 1 ohm speakers in series to provide a nominal 8 ohm impedance. - David S. 15:38:51 09/29/14 (4)

RE: The Bose 901 uses 1 ohm speakers in series to provide a nominal 8 ohm impedance. - Awe-d-o-file 06:07:08 09/30/14 (3)

RE: least offensive pieces of car audio. - David S. 07:07:11 09/30/14 (2)

RE: "Bose amp failures". - 1973shovel 12:47:11 09/30/14 (0)

RE: least offensive pieces of car audio. - Awe-d-o-file 08:36:49 09/30/14 (0)

RE: Series connection of drivers in hi-fi speakers? - Presto 08:27:28 09/29/14 (0)

RE: Series connection of drivers in hi-fi speakers? - jsch3 06:27:26 09/29/14 (3)

A true "series crossover" . . . - Brian H P 10:50:23 09/29/14 (1)

RE: A true "series crossover" . . . - neolith 08:47:23 10/01/14 (0)

RE: Series connection of drivers in hi-fi speakers? - jackson 07:00:40 09/29/14 (0)

Follow Ups

A true "series crossover" . . . - Brian H P 10:50:23 09/29/14 (1)

RE: A true "series crossover" . . . - neolith 08:47:23 10/01/14 (0)

A true "series crossover" . . .

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