I bet I can make your speakers sound better.

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maty

Re: I bet I can make your speakers sound better.
« Reply #281 on: 18 Mar 2020, 02:40 pm »
YouTube Lets fix the Kef Q100!




KEF Q100 with the mods of GR-Research, aka Danny Richie. Port closed.
https://www.audiosciencereview.com/forum/index.php?threads/kef-q100-speaker-review.11987/post-352936

Frequency and crossover

54801


Impedance

54803


Horizontal

54804


Cumulative Spectral Decay (CSD)

54805

maty

Re: I bet I can make your speakers sound better.
« Reply #282 on: 30 Mar 2020, 02:38 pm »
YouTube Modifying the JBL Studio 530 with Danny Richie! by Ron Brenay and Danny Richie


RichPark

Re: I bet I can make your speakers sound better.
« Reply #283 on: 19 May 2020, 12:51 am »
The male studs are available separately and are only $3.00 each. So you can add them to all your speaker cables.


Very reasonable stud fee :lol:

jcsperson

  • Jr. Member
  • Posts: 157
Re: I bet I can make your speakers sound better.
« Reply #284 on: 19 May 2020, 01:29 am »
Off topic

English is not my first or second language. Spanish and Catalan are the first.

My town: https://en.wikipedia.org/wiki/Tarragona

More than two thousand years before: https://en.wikipedia.org/wiki/Tarraco

Also off topic, but I've been to Barcelona and some of the wineries outside the city. Catalonia has a different feel than the rest of Spain even beyond the language.

maty

Re: I bet I can make your speakers sound better.
« Reply #285 on: 19 May 2020, 09:29 am »
Spain is very diverse, both in climate, geografy, gastronomy, languages, welfare state and ways of living. That is wealth, but many want to make it a problem.

The problem, as it happens with all countries, is that many remain in old stereotypes and generalize.



- End of topic -

Jairaj

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Re: I bet I can make your speakers sound better.
« Reply #286 on: 26 May 2020, 08:08 pm »
Hi All,

I'm Jai, new member here with first post.  I've just been watching the fabulous and very interesting GR Research videos on Youtube on how to upgrade your speakers.

I have a pair of Focal Chorus 806W speakers that I'd like to upgrade using the methods described in the videos. 

Danny from previous posts I see you used to be a Focal dealer have you come across these speakers before?  I think they were a special edition using better W woofers by Focal as apposed to the V woofers used on more budget speakers.  Any pointers on improving these?


I've never done anything like this before so thought I'd try on an old pair of broken speakers first before I start pulling apart by beloved speakers.  I have a pair of old Focal Chorus 707s speakers, one woofer is damaged and makes a heavily distorted bass noise which I am using as a trail run.  I opened the speakers and noticed some good and bad things.   Good the speakers are made from thick MDF and have internal bracing bad, the wire inside is cheap quality and uses the spade connecters rather than soldered on.

Then onto the crossover circuit, as expected sand cast resistors and iron core inductors as is common for this price point.  I've mapped out the cross over circuit for the high and low circuits.  The only problem I have is figuring out what value the inductors are?  There are no markings on them at all.  The caps and resistors have values so easy enough for me to find replacements but no idea where to start with the inductors? 

I have some photos of the cross over circuitry and one of the inductors incase it helps?

Any help much appreciated, thank you,
Jai

Cross over circuit:


Fully assembled cross over circuit:


Pictures of one of the inductors:







maty

Re: I bet I can make your speakers sound better.
« Reply #287 on: 26 May 2020, 09:04 pm »
http://www.hifi-review.com/specs/151068-focal-jmlab-chorus-806v.html

System type   2-way
Enclosure type   Bass-reflex
Frequency response ± 3dB   55 - 28000 Hz
Nominal impedance   8 Ohm
Amplifier Requirements   20 - 80 W
Sensitivity (2.83V/1m)   90 dB
Tweeter   25 mm (1 in.) TNV inverted dome
Woofer   165 mm (6.5 in.) Polyglass cone
Dimensions (H x W x D)   390 x 222 x 293 mm / 15.35 x 8.74 x 11.54 in.
Weight   8.2 kg / 18.04 lbs.


[PDF] https://www.focal.com/sites/www.focal.fr/files/shared/catalog/document/chorus_806v-specification_sheet.pdf

The numbers are different!

Crossover frequency 2200 Hz

Jairaj

  • Jr. Member
  • Posts: 3
Re: I bet I can make your speakers sound better.
« Reply #288 on: 26 May 2020, 11:14 pm »
Hi Matty,

Those are not quite the same speakers as I have.  Mine are the 806W.  This is the spec sheet from Focal for them:
https://www.focal.com/sites/www.focal.fr/files/shared/catalog/document/chorus_806v_w-specification_sheet.pdf

But as I said I am a beginner to the modifying world so I'm going to do a practice run on my Focal Chorus 707S first.  I cannot find these speakers on the Focal website.  These are the nearest I could find, I think they use the same woofer:
https://www.focal.com/sites/www.focal.fr/files/shared/catalog/document/chorus-807-v-fp.pdf

Type:  Compacte 2 voies bass-reflex
Haut-parleurs:   Grave/médium Polyglass 180 mm
Tweeter:   inversé TNV Al/Mg 25 mm
Réponse en fréquence:   (+/- 3 dB) 50Hz-28kHz
Réponse à - 6 dB:  41 Hz
Sensibilité (2,83 V / 1 m):  92 dB
Impédance nominale:  8 ohms
Impédance minimale (@25°C):  4,2 ohms @160 Hz
Puissance max:  160 W
Puissance RMS:  110 W
Fréquence de filtrage:  3 kHz
Dimensions (HxLxP). 448x237x280mm
Poids. x10,1kg

So looks like the cross over frequency is 3000Hz.

Can I use this and plug the cross over frequency into LRC filter equations and solve the equation for inductance?

Danny Richie

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Re: I bet I can make your speakers sound better.
« Reply #289 on: 27 May 2020, 02:40 am »
You mean you want to upgrade these?



I designed a whole new crossover and smoothed things out a bit.



They had some issues.

I have before and after measurements and everything.

Jairaj

  • Jr. Member
  • Posts: 3
Re: I bet I can make your speakers sound better.
« Reply #290 on: 27 May 2020, 11:34 am »
Hi Danny,

Thank you for replying.  hahah thats fantastic, yes the Focal 707s, those are the ones I'm going to practice on first!  Can you share some more information please? or help with the inductor values?

And even better if you also have any info and advice on modifying the Focal 806VW which is the end game for me?

many thanks, Jai

Danny Richie

  • Facilitator
  • Posts: 13153
    • http://www.gr-research.com
Re: I bet I can make your speakers sound better.
« Reply #291 on: 29 May 2020, 02:50 am »
Hi Danny,

Thank you for replying.  hahah thats fantastic, yes the Focal 707s, those are the ones I'm going to practice on first!  Can you share some more information please? or help with the inductor values?

And even better if you also have any info and advice on modifying the Focal 806VW which is the end game for me?

many thanks, Jai

Just give me a call. I can provide you with everything you need.

I have not worked on the 806VW model.