Planar Speaker Asylum

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Planar Speaker Asylum

RE: How loud will my 63s be able to go with line-level 150Hz high pass filtering?

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In Reply to: RE: How loud will my 63s be able to go with line-level 150Hz high pass filtering? posted by Timbo in Oz on September 24, 2016 at 00:42:12

Something that might be pointed out here is that ANY filter that comes before Quad ESL 63s in good working order will be audible.

My experience is that this audible effect removes, to a greater or lesser degree, the very satisfying transparency of the Quads.

In my system, even the one high quality cap in the Dahlquist LP 1 is audible and removes information.

If you don't miss the information you lose that's fine, but I certainly did.

Follow Ups:

isn't there a 220Uf cap on the 63's input? - Timbo in Oz 11:35:36 09/27/16 (0)
That's been changed anyway, along with the protection mods, and bypassed IIRC.
A big, old electrolytic, and at spkr / power-amp level, too.
Which means that I have _increased_ the transparency, substantially!
And the PLL HP input filter on the LEAKs (and the Perreaux Summer amp,) use high quality 'commercial audio'* Rs and caps.
You know, somehow I think I'm ahead! Have you replaced that cap on your 63s or later versions?
:-)!
*I do not 'believe' in $$$$ caps. The best thing to do with a capacitor in a circuit, if possible, is to design it out.
I mostly listen to, and make recordings of, live acoustical music aka Classical.
The array is are going to be a tool to learn with.

Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger

Edits: 09/28/16
RE: How loud will my 63s be able to go with line-level 150Hz high pass filtering? - Satie 09:20:30 09/27/16 (0)
It is always a trade-off. One high quality cap is usually not a deal breaker and in the case of the Dahlquist I think you could do better by bypassing its connectors. They may be responsible for more audible degradation than the cap itself. I added a protective cap on my mids an octave below their rollover, and found sonicap type 1 and type 2 were audible as were sonicap platinum (tefon) orange drops, pannie film, and electrocube, but the cheap foil cap from the dayton brand was nearly entirely transparent, just rounding the slightest amount of detail. There are better caps yet to try, but I am very happy with that one considering the price difference with say a Jupiter copper and wax piece. I am pretty certain with the effect since I am comparing the performance with a cap vs without (bass turned off, female vocals flute and violin for material). The cap was hardwired into the interconnect- no added connectors.

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