Home Speaker Asylum

General speaker questions for audio and home theater.

The 10" drivers have an Fs of 30 hz, 8 ohm 90db.

With push-pull you are looking at -3db so actually 87db/w. These may need an Rb enclosure.

The 12s are 93db/w and 8 ohms, 23Hz. So sealed p-p gives around 90db/watt.

The big rb Sub is an old design but IIRC is about 90db/w, 8 ohms, and ran happily off a 100 watt amp with hard use.

Its partner will use a new Canton 26cm woofer which is 3.5 ohms and 91db/w, and can handle 100watts. Similar box size and port.

I'm hoping that both Rb subs will get down to their Fbs without needing heaps of power and that's why I will use the HK 870 for them, to start with.

I will be sitting down with a box-plotter for all three box builds and make sure I'm getting down low enough before the EQ is added. I do have all 5 driver's TS's to do that with.

The room does give room gain >ing as f falls, but it's not a concrete room!


Tim Bailey

Skeptical Measurer & Audio Scrounger

Edits: 05/08/17

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