Search found 174 matches

by Wolfgang
Sat Mar 28, 2020 1:31 pm
Forum: Speakers
Topic: Sound damping material
Replies: 32
Views: 1221

Re: Sound damping material

If that's the frequency response of the driver in a baffle then it will work even at lower frequecnies. Must be a hell of driver!
by Wolfgang
Thu Mar 26, 2020 6:08 pm
Forum: Speakers
Topic: Sound damping material
Replies: 32
Views: 1221

Re: Sound damping material

I wonder how they would perform with a full range unit, like the Lii Audio ones, run open on a small baffle? They subs are limited to 120Hz max with the internal x-over because of servo control precision. The higher the frequency the harder for the servo to react precisely enough. Using the LFE inp...
by Wolfgang
Wed Mar 18, 2020 1:55 am
Forum: Speakers
Topic: Sound damping material
Replies: 32
Views: 1221

Re: Sound damping material

Obviously a misunderstanding.
The drivers are the SW-12-08
http://www.rythmikaudio.com/GR_drivers.html
can be ordered here: http://gr-research.com/drivers.aspx

Couldn't find the link for the H-frame plans so I attached the pdf.
H-frame 2.pdf
(81.11 KiB) Downloaded 21 times
by Wolfgang
Tue Mar 17, 2020 3:50 pm
Forum: Speakers
Topic: Sound damping material
Replies: 32
Views: 1221

Re: Sound damping material

And the OB subs? The subs come with a 370W RMS into 4 ohm amp (linear psu) per channel with the servo control board built in. A370XLR3 (2).jpg All controls are analog which is not my favorite way of doing this kind of stuff so I bypass them (LFE input ) and use my digital x-over for controlling Kli...
by Wolfgang
Mon Mar 16, 2020 11:16 pm
Forum: Speakers
Topic: Sound damping material
Replies: 32
Views: 1221

Re: Sound damping material

Simon, I listen with active (TS 300B PP/Burmester clone) modified Klipsch La Scala horns. The photo shows what I did. KH_sub.jpg The original sound has changed a lot, more open and relaxed than the typical KH sound. The midrange horn/300B PP needed some EQ for sounding lush and full rather than anem...
by Wolfgang
Sun Mar 15, 2020 11:38 pm
Forum: Speakers
Topic: Sound damping material
Replies: 32
Views: 1221

Re: Sound damping material

I am taking it, that by a previous comment offered, I got your location quite wrong. No problem, John. The resonances are not easily heard until you remove them.. The bass sounds so clean, fast, and real compared to my previous sub (active/closed box) that it probably will take a while before I sta...
by Wolfgang
Sun Mar 15, 2020 2:09 am
Forum: Speakers
Topic: Sound damping material
Replies: 32
Views: 1221

Re: Sound damping material

To me a rattle sounds like the speaker is exceeding its Xmax . You are right, Steve! I've found the problem. These amps have a lot of extra settings and the servo settings in combination with the typical x-over/PEQ settings was not correct. The servo control (extension filter) can be set to low/mid...
by Wolfgang
Sat Mar 14, 2020 6:26 pm
Forum: Speakers
Topic: Sound damping material
Replies: 32
Views: 1221

Re: Sound damping material

Some would consider MDF only fit for building prototypes, because it's cheaper than "proper" materials. The only material which sounds more "dead" if you knock on it is some kind of resin which is used for those very expensive speakers (like WilsonAudio etc). Normally MDF is considered to be acoust...
by Wolfgang
Sat Mar 14, 2020 3:25 pm
Forum: Speakers
Topic: Sound damping material
Replies: 32
Views: 1221

Sound damping material

I have finished my first OB sub with servo controlled woofers (second one in the making) and was wondering if cheaper damping sheets than "No Rez" or "Black Hole 5" would have the same effect? http://gr-research.com/norez24x27sheet.aspx/amps/amps.htm http://www.speakercity.com/Merchant2/merchant.mvc...
by Wolfgang
Sun Feb 23, 2020 4:24 pm
Forum: Speakers
Topic: Tannoy Enclosure
Replies: 51
Views: 1714

Re: Tannoy Enclosure

This is a very interesting discussion. And all the necessary components are in the mix like critical damping, room interaction, speaker behavior at resonance frequency, DF of amp, historic development of speaker-amp-relation etc. The only thing this discussion is still missing IMO is to draw the rig...
by Wolfgang
Wed Feb 19, 2020 10:56 pm
Forum: Everyones Projects
Topic: 300B Headphone Amp
Replies: 58
Views: 6853

Re: 300B Headphone Amp

Looks like some typical ground loop stuff, Ray. I would try first to connect one power plug with reversed phase/neutral (turn it around 180 degr) and see what happens. I am sure this is an easy fix.
I am eager to hear about your experience with the different filter settings!
by Wolfgang
Thu Feb 13, 2020 4:35 am
Forum: Everyones Projects
Topic: Tactile perception
Replies: 19
Views: 1238

Re: Tactile perception

This thread documents a lot of what went into the concept:
http://www.audio-talk.co.uk/phpBB3/view ... =11&t=5666
Very impressive!
The crossovers are passive line level built into the amplifiers.
Is there any SQ benefit/advantage doing it like this compared to using an active x-over?
by Wolfgang
Tue Feb 11, 2020 10:58 pm
Forum: Everyones Projects
Topic: Tactile perception
Replies: 19
Views: 1238

Re: Tactile perception

These are nearly always subtle tonal colours or combinations, vocals that sound so real they are in the room, or the 'stuff between the notes'. I have only experienced these insights from low-power drivers or compression drivers which have no 'stiction'. That would also describe some part of what I...
by Wolfgang
Sun Feb 09, 2020 6:56 pm
Forum: Everyones Projects
Topic: Tactile perception
Replies: 19
Views: 1238

Re: Tactile perception

In a nutshell I would say it depends on how well the amps can drive the speakers (not only power related) so that they can couple effectively enough to the air volume of the listening room and how capable the speakers are to do that (like:moving enough air fast enough) which then creates ideally thi...
by Wolfgang
Fri Feb 07, 2020 4:13 pm
Forum: Speakers
Topic: Ali Bastanis OB testing & results
Replies: 84
Views: 2885

Re: Ali Bastanis OB testing & results

Well the price of the drivers is what it is, I’d say an NX 3000 could be used instead which is a good bit cheaper. How much were your Lowthers? Vic commented that he’d tried a lot of bass drivers, it was these particular ones that give these very good results. The Lowthers DX4 were almost the same ...