a correction, to use the Active crossover you would need to bypasss the passive LP crossover that is inside

the Base Module. At 70Hz low-pass in to it you are still not High-pass filtering out the mains module's pass-band down to 40Hz nor the large amounts of power down to ELF being fed into it.

As I read it the EOS design has difficulty playing real LOUD, because the smaller bass driver in the main module is being driven into over-excursion (overload distortion) below its port's tuning frequency. IE signals below 40 or so Hz. There is no 35-40Hz HP filter inside the main module.

To put it another way, the original design has a flaw. A high-power FR signal is being fed to the ported main module tuned to 40Hz. ELF signals below that are putting the main module into overload.

On reflection stay with 70Hz but add in active 4LR High Pass at 70 Hz. This will eliminate the Main Module's problem with signals below its port tuning. This will increase the system's headroom / peak loudness. Which was likely your initial objective with bi-amping

BUT you also MUST remove the LP crossover that is inside the Base Module. It is probably set to 55Hz or a bit higher, and it may not be steep.

Adding these two LP filters in series - as I believe you are still doing - is likely giving you a deep notch somewhere between 40 and 70 Hz, unless your room has a peak which cancels it, which is unlikely.

Next, If you have the funds and the DBX unit is out of warranty, I would also convert the 40Hz ELF filter option to 20 Hz. The benefit here is less overload from frequencies below 25 Hz. And once again more system headroom.

Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger

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Follow Ups Full Thread

Topic - Bi-Amping - Horizontal and Vertical - Lifer 16:41:02 10/02/16 (25)

RE: Bi-Amping - Horizontal and Vertical - SgreenP@MSN.com 21:18:20 10/04/16 (1)

Problem is teh main module a 2-way is port tuned to ~ ) 40 Hz but no HP filter - causing overload/cone-bounce - Timbo in Oz 21:58:46 10/04/16 (0)

Same approach I take with my HT - E-Stat 06:04:25 10/04/16 (1)

RE: Same approach I take with my HT - Lifer 12:31:01 10/04/16 (0)

Perhaps that is why I find the adjustment of frequency (now at 70 HZ) and the .. adjustments .. very finicky" - Timbo in Oz 23:16:57 10/03/16 (3)

RE: Perhaps that is why I find the adjustment of frequency (now at 70 HZ) and the .. adjustments .. very finicky" - Lifer 12:30:01 10/04/16 (2)

a correction, to use the Active crossover you would need to bypasss the passive LP crossover that is inside - Timbo in Oz 20:34:06 10/04/16 (1)

RE: a correction, to use the Active crossover you would need to bypasss the passive LP crossover that is inside - Kal Rubinson 05:56:33 10/05/16 (0)

RE: Bi-Amping - Horizontal and Vertical - A.Wayne 20:45:55 10/03/16 (1)

RE: Bi-Amping - Horizontal and Vertical - hahax@verizon.net 20:28:22 10/04/16 (0)

Sounds like horizontal to me. As far as I know, the term... - jeffreybehr 15:45:59 10/03/16 (1)

Review? - Timbo in Oz 23:37:20 10/03/16 (0)

RE: Bi-Amping - Horizontal and Vertical - erik_sq 08:48:17 10/03/16 (9)

RE: Bi-Amping - Horizontal and Vertical - Lifer 12:38:51 10/04/16 (3)

RE: Bi-Amping - Horizontal and Vertical - erik_sq 14:32:35 10/04/16 (2)

If you look at the review by Stereophile - Timbo in Oz 00:29:20 10/05/16 (0)

If you look at the review by Stereophile - Timbo in Oz 00:15:29 10/05/16 (0)

Review? - Timbo in Oz 23:39:06 10/03/16 (0)

RE: Bi-Amping - Horizontal and Vertical - pictureguy 20:02:45 10/03/16 (3)

RE: Bi-Amping - Horizontal and Vertical - erik_sq 20:17:11 10/03/16 (2)

RE: Bi-Amping - Horizontal and Vertical - pictureguy 20:52:41 10/03/16 (1)

Bi-amping with planars? - Timbo in Oz 00:06:56 10/04/16 (0)

Artemis Eos!!!!! - Kal Rubinson 06:45:00 10/03/16 (2)

See above? - Timbo in Oz 00:10:09 10/04/16 (0)

We took a pair in trade - Awe-d-o-file 09:17:42 10/03/16 (0)

Follow Ups

a correction, to use the Active crossover you would need to bypasss the passive LP crossover that is inside - Timbo in Oz 20:34:06 10/04/16 (1)

RE: a correction, to use the Active crossover you would need to bypasss the passive LP crossover that is inside - Kal Rubinson 05:56:33 10/05/16 (0)

a correction, to use the Active crossover you would need to bypasss the passive LP crossover that is inside

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