10 " Dipole speakers to supplement floorstanders

[hybridfiat]

Im buying a pair of 10" Exodus drivers (www.audiomarketplace.com.au) and Id like to use them to supplement the bass of my MTM peerless floorstanders. Any suggestions as to filters, separate amps or sub amps to power them. Ive not done a dipole before but I can knock up an amp pretty quickly so if they need extra power I could conceivably do an amp for each.
Id appreciate any suggestions.
The current system I have is an Audiosector amp 2 channel 60w/ch driving the floorstanders. I use my Creative Zen or the Apple Mac as a source.

[richie00boy]

To be honest unless you listen only at pretty low levels, 10 inch in dipole per side is not going to keep up with floorstanders or offer you much if any improvement in extension without a lot of EQ.

[Rudolf]

You need to provide some more information regarding the kind and dimensions of the dipole you are intending to build (OB, U-, H- or W-frame, Ripole?). Otherwise any recommendation for filter/EQ is useless.

Whatever you build: Power demand will not be limited by the drivers power limit, but by its excursion limit. How early you reach the excursion limit depends on your planned low frequency limit. So please refrain from something like 25 Hz. 40 Hz would be much more realistic if you intend to use just one 10" Exodus per side IMHO.

[sreten]

Hi,

19mm xmax one way ? that is not too shabbly at all.
82dB half space sensitivity ? not a lot, juice required.
300W maximum power handling.

quick modelling - needs checking, indicates open baffle
the driver does not excursion limit at all with 50W,
100W around 24Hz, 200w around 31Hz, 300W/35Hz.

So a 500W / 4 ohm plate amp is around the maximum.

The actual SPL you will get depends on the baffle loss,
i.e. the effective baffle size of your dipole. Adding this
6dB / octave rolloff to the excursion limit means that
anything lower than ~ 35Hz will become a struggle.

As already said you can always add bass for lowish
levels with a subwoofer, the difficulty is matching
maximum levels and getting extra bass extension.

/sreten.

[hybridfiat]

Im thinking Ripole as per the RiPole 30 from the Lautsprecher shop.

[Rudolf]

The Exodus DPL-10 is a fine driver with Fs=23 Hz. You don´t need to lower that in any way - which a ripole would do. So you really don´t need the narrow, efficiency robbing ripole configuration. Please refrain from making the front opening as small as the RiPole 30 suggests. Think more in line with Siegfried Linkwitz´W frames.

Why don´t you try a U- or H-frame? Much better efficiency and lower resonance peak than with a (half) W frame.

[Calvin]

Hi,

the Ripole-casing from the Lautsprecher-Shop will be too small!
The opening areas are intended for woofers with much lower excursion capabilities. Additionally the considerable resonance-lowering effect of such a small casing is not only not needed with the Exodus, but is actually a negative aspect here. So the casing for the Exodus needs a greater opening area -at least to the front- if You want to stay with this N- or W-style dipole (N=1,W=2 drivers). The driver itself seems to be a good choice that allows for an excellent linear freq-response.
The high excursion capabilities will allow for sufficient SPL-levels and astonishingly high wattage-levels. A pair of Exodus could deliver >100dB@1m down to 20Hz.

jauu
Calvin

[hybridfiat]

Wow, thanks for the advice. Ill try a W config in a test baffle and listen to what it sounds like.

[col]

Hybridfiat,

would you mind me asking how much the postage cost was for your 2 x Exodus 10" sub woofers?

cheers,
col.

[sreten]

Originally posted by Calvin
A pair of Exodus could deliver >100dB@1m down to 20Hz.
Calvin

Hi,

How much baffle loss are you including at 20Hz ?

:0/sreten.