Author Topic: The Cape Town Hi-Fi Club  (Read 264606 times)

Offline SeanS

Re: The Cape Town Hi-Fi Club
« Reply #1485 on: March 10, 2019, 09:53:24 PM »
whats the approach around XO frequency and slope choices, time alignment etc... was there a common denominator as you could spend a day trying those with one combo  of drivers.

Hoping to be there.. can probably discuss there.

Offline bbe22

Re: The Cape Town Hi-Fi Club
« Reply #1486 on: March 11, 2019, 07:38:44 AM »
.................   looking forward to Chris and Jason filling us in on those and other aspects , I am planning to go , hope to see u there ......

Offline SeanS

Re: The Cape Town Hi-Fi Club
« Reply #1487 on: March 11, 2019, 06:11:01 PM »
.................   looking forward to Chris and Jason filling us in on those and other aspects , I am planning to go , hope to see u there ......

Yes I'll definitely be there..

Offline chrisc

  • Trade Count: (+127)
  • AVForums Grandmaster
  • *****
  • Posts: 10,438
  • Total likes: 235
  • Cape Town Hi-Fi Club - get better sound
Re: The Cape Town Hi-Fi Club
« Reply #1488 on: March 13, 2019, 08:22:08 AM »
More details of the upcoming event on Saturday 16th March

Have you ever wanted to construct your own speakers and didn't know which drivers to choose? Or wonder what difference the size of a driver makes? Or what effect the radiation pattern of a driver has? What about the modern proliferation of full-range transducers, or the claims behind coaxial arrangements and phase alignment?

We would like to invite you to a special kind of speaker shootout on Saturday 16 March.  32 tweeter and mid-woofer drivers have been procured for the sole purpose of conducting listening tests, to evaluate their performance. We will spend the day listening to the various combinations of stereo pairs, with the ultimate goal of determining the best combination tweeter and midrange driver for use in a future reference speaker.

Drivers from manufacturers like Aurasound, Dayton Audio, Eminence, FatalPRO, Peerless and SB Acoustics will be on offer for evaluation, with tweeters ranging from 3/4" to 1-1/8" and mid-range drivers from 3" to 6.5". There is even a coaxial option, as well as a model claiming full-range coverage from a single driver.

In selecting the drivers, focus was placed on obtaining the best performance for the money. Club members spent months reading reviews and pouring over datasheets to shortlist possible models, which were then imported at significant expense. Narrowband drivers, or those with features in their phase response or non-smooth group delay curves were eliminated from the mix. The requirements for the mid-woofers were particularly challenging, as we desired a flat, smooth response over more than four octaves

For the tweeter selection, focus was placed on obtaining a smooth-sounding response without tinny resonances or harshness. When taken together with budget limitations, this steered the tweeter selection towards soft fabric/silk tweeters. We will have dome types and ring radiators on offer, which offer very different radiation patterns.

For the Saturday listening tests, the transducers have been individually boxed. 20 different enclosures have been designed and constructed, individually optimised for each driver, with cabinets dimensioned to avoid resonances in the excited frequency bands of the driver. Each transducer will be driven with separate, custom, individual amplifiers and digital electronic active crossovers that will be readjusted and optimised for each tweeter/woofer pair. This presents the club with the unique opportunity to mix and match any combinations of mid-woofer and tweeter on the fly.

The day will consist of a series of two rounds of blind listening tests, with speakers only being identified by number.

The make, model and price will only disclosed at the end of the day.

During the first "elimination" round, we will evaluate all the mid-woofers using a reference tweeter and subwoofer, and short-list the three highest-ranked ones. Likewise, we will evaluate all the tweeters using a reference mid-woofer and subwoofer and shortlist the three highest-ranked ones. During the second "final" round, we will listen to every combination of the three shortlisted tweeters and midrange drivers to select an overall winning combination.

We will use the club's standard reference audio tracks and scoresheets that many of you have seen at other speaker shootouts. At the end of the day, we will announce the winning scores and the model and cost of each driver... and who knows?... there may be a few surprises!

This is a unique opportunity, unlikely to be repeated again any time soon, as club members have donated a lot of their personal money and time to make this happen. Please join us in Rondebosch on Saturday 16 March at 09h00 for this first, and possibly only, shootout of its kind!

The agenda is as follows:

   09h00 start of elimination round (18 sets; 8 min listening, 2 min swap time each for 3 hr total)
   12h00 1 hour lunch break
   13h00 "finals" round (9 sets, 15 min each)
   15h15 tea break while we capture results.
   15h30 award ceremony and announcement of makes/models.
   16h00 teardown.

Lunch is included and some drinks.  There is no charge for club members.  For visitors there is a R100 fee to help cover our costs

You can also pay an annual subscription of R150,00 which will include all the club events scheduled for 2019 at no extra charge

The address is 10 Muir Road, Rondebosch.   Please be sure to arrive on time, as we have a lot to do and interruptions slow us down.  Thanks


Even duct tape can’t fix stupid… but it can muffle the sound

Offline chrisc

  • Trade Count: (+127)
  • AVForums Grandmaster
  • *****
  • Posts: 10,438
  • Total likes: 235
  • Cape Town Hi-Fi Club - get better sound
Re: The Cape Town Hi-Fi Club
« Reply #1489 on: March 14, 2019, 03:18:57 PM »
Load shedding to Stage 2 has been implemented and Area 5, where our meeting is to be held, may be off from 10h00 to 12h30 on Saturday 15th

One of our members has a Honda inverter he will bring along and this can provide 2Kw of power, so all is well
Even duct tape can’t fix stupid… but it can muffle the sound

Offline What

Re: The Cape Town Hi-Fi Club
« Reply #1490 on: March 14, 2019, 05:39:23 PM »
EskomSePush! And before you guys floek me - https://play.google.com/store/apps/details?id=com.ashwhale.sepush.eskom&hl=en_ZA Sounds better if you are a Capie  :giggle:

Whish I could attend  :(

Offline The Godfather

Re: The Cape Town Hi-Fi Club
« Reply #1491 on: March 14, 2019, 09:04:51 PM »
There like a bear.

Offline chrisc

  • Trade Count: (+127)
  • AVForums Grandmaster
  • *****
  • Posts: 10,438
  • Total likes: 235
  • Cape Town Hi-Fi Club - get better sound
Re: The Cape Town Hi-Fi Club
« Reply #1492 on: March 16, 2019, 07:22:03 AM »
Even duct tape can’t fix stupid… but it can muffle the sound

Offline chrisc

  • Trade Count: (+127)
  • AVForums Grandmaster
  • *****
  • Posts: 10,438
  • Total likes: 235
  • Cape Town Hi-Fi Club - get better sound
Re: The Cape Town Hi-Fi Club
« Reply #1493 on: March 16, 2019, 09:49:57 AM »
Session under way, 22 visitors
Even duct tape can’t fix stupid… but it can muffle the sound

Online Shonver

  • Trade Count: (+8)
  • AVForums Grandmaster
  • *****
  • Posts: 10,589
  • Total likes: 51
  • Criss-cross rhythms that explode with happiness
    • Elipse (under construction)
Re: The Cape Town Hi-Fi Club
« Reply #1494 on: March 16, 2019, 07:17:47 PM »
Man! That was a legendary event! Once-in-a-lifetime kinda thing. Highlight was some opinionated and knowledgeable guests who engaged throughout the meeting. But only made possible by one man's curiosity and the collaboration of other club members. Lots of work went into making this a memorable exercise.

Thanks, guys!

Sent from my LG-H870 using Tapatalk
________________

DON'T PANIC
Capie

Online Shonver

  • Trade Count: (+8)
  • AVForums Grandmaster
  • *****
  • Posts: 10,589
  • Total likes: 51
  • Criss-cross rhythms that explode with happiness
    • Elipse (under construction)
Re: The Cape Town Hi-Fi Club
« Reply #1495 on: March 16, 2019, 07:19:48 PM »
I just have this photo.



Sent from my LG-H870 using Tapatalk

________________

DON'T PANIC
Capie

Offline SeanS

Re: The Cape Town Hi-Fi Club
« Reply #1496 on: March 16, 2019, 09:05:36 PM »
Excellent event.. thanks everyone who was involved in setting up and hosting  :2thumbs:

Offline The Godfather

Re: The Cape Town Hi-Fi Club
« Reply #1497 on: March 16, 2019, 10:22:05 PM »
Absolutely.

Was a marvelous event, generous individuals who gave of their time and resources.

Thanks Chris for organisng, Andrew for hosting, Joshua and Jason for putting in all the prep work and for being so patient with all the requests for changes. And then to apl the members who attended and gave input.

This was such a unique experience.

Offline pwatts

Re: The Cape Town Hi-Fi Club
« Reply #1498 on: March 16, 2019, 11:28:46 PM »
I was unable to attend.. is there a writeup of some of the outcomes pending?

Offline AlleyCat

Re: The Cape Town Hi-Fi Club
« Reply #1499 on: March 16, 2019, 11:34:52 PM »
^^ As a newbie, couldn't have said it better Ross ( The Godfather). Thank you guys for a wonderful day.

To Jason the instrument struck at he beginning of Allan Taylor's 'Colour The Moon' is a Chime, played by Hans-Jörg Maucksch
"Not everything meaningful is measurable, and not everything measurable is meaningful" - Floyd Toole