Anatomy of a 20 pair of speakers - Page 2 - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 8th December 2012, 09:17 AM   #11
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Default Post-op : the gleaned facts

Hi,

Cabinet is 12mm decent density MDF.

x/o is single tiny capacitor on the tweeter,
bipolar and I can't read the value.

"Damping" is a single sheet of 15mm lightweight BAF.

Tweeter is 4 ohm with a 7.5mm x 45mm magnet.

Midbass (4 ohm) has a 11mm x 60mm magnet.
It is a paper cone metalised on the front only.
Slightly concave flat plastic dustcap.
Estimated 22mm diameter voicecoil.

TBH pictures wouldn't be that interesting, it seems you
do get what you pay for, in this case not bad for 20.

Verdict :

TBH I was surprised a little at how basic they are. The last
similarly built speakers I looked at I truly hated the sound.

The best part is the cabinets, they are worth the asking
price for a project if cabinet building is not easy for you.
The grilles are usable but can be improved
with a felt lining to reduce diffraction.

The input terminals are fine for what they are.

Internal damping was a joke, easily improved.

The jury is out on the cheap drivers and x/o.
May have a good look at them when I have
some real spare time, but not at the moment.

Overall I have them down as adequate for what I'd call "normal"
TV levels, but not much more, relatively they are good value.

rgds, sreten.

Bass unit cutout is 100mm, tweeter unit 50mm + lug ears.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Last edited by sreten; 8th December 2012 at 09:26 AM.
  Reply With Quote
Old 8th December 2012, 09:38 AM   #12
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

To answer some of the other posts :

I'm not in a position to measure them at the moment.

For hifi I would assume the 50 Diamonds are far better,
and a much better buy, these are a false economy.

Probably ok as rears in a basic setup. The other use I can think
of is one my very budget tricks : modding the headphone out
or adding interruptable speaker sockets to TV's and driving
basic external speakers with the TV's power amplifiers.

rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Last edited by sreten; 8th December 2012 at 09:50 AM.
  Reply With Quote
Old 8th December 2012, 09:42 AM   #13
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Quote:
Originally Posted by jerome69 View Post

Look like this model : Eltax - Concept Mini
Hi,

Indeed. The only difference being the port and grill stud mounting.
In fact RS's picture of the Tibo's looks more like the Eltax's.
RS were selling the Eltax's at 30 a pair.

rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
  Reply With Quote
Old 8th December 2012, 01:42 PM   #14
diyAudio Member
 
jerome69's Avatar
 
Join Date: Feb 2008
Location: Lyon
Hi, thanks for the report,

What is the internal volume of the box ?

rgds
  Reply With Quote
Old 8th December 2012, 05:46 PM   #15
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

12mm stock gives just under 4L, some stuffing and
lining might get effective box volume up somewhat.

I have plans for these, updating the OK but insipid power
handling bassmid, currently investigating driver options.

rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
  Reply With Quote
Old 8th December 2012, 06:09 PM   #16
diyAudio Member
 
jerome69's Avatar
 
Join Date: Feb 2008
Location: Lyon
Seas has good drivers options with CA12/L12/W12 woofers.
Troels project could be a good starting point : Eekels' Mini
Cheaper options are peerless HDS-104, ss 12W/8524G00, sb acoustics SB12NRXF25-4
a French project : Projet Toybox : la mini aux deux visages ! - Enceintes
Plenty of 4" drivers
  Reply With Quote
Old 8th December 2012, 07:10 PM   #17
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

Dragging out two of my budget references that have been in storage
for years indicates that I have been somewhat generous, as they
both slaughter the Tibo's in every sensible respect for music.

The Tibo's are definitely only good for AV with their vocal emphasis,
and that is for a very basic system as power handling is very poor.

The two speakers are JPW ML310's and Mordaunt Short MS20i Pearls.

Both bought on a similar whim from RS, both for 50 a pair on sale.
Of the two the JPW's are more robust sounding, the MS's delicate.

The Tibo's are 6"x7"x9". Nominally 4" bassmid.

The somewhat larger, 7"x7"x12" JPW's are in a different league for music.
Vocals are put back in the correct perspective, there is bass, a lot more
power handling, a bit rough and ready, a little opaque, but miles better.
Nominally a 5.25" bassmid.

The larger again MS's, 7.5"x8.5"x14.5", with their lighter balance sound
more detailed but this allied is with some genuine transparency. Clean
power handling takes a further good step and bass goes even deeper.
They are a world away from the Tibo's, and big step from the JPW's.
Nominally a 6.5" bassmid. (Would be great basis for a DIY TL/MLTL.)

The Tibo's are going to be a project to reuse the cabinet and tweeter,
and to try to get something that can compete with the above for size.

rgds, sreten.

Note : I retuned the bass alignment of both the JPW's and MS's,
by foam lining the ports, for the above, not returned to stock.
Speaker placement near wall for all three.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Last edited by sreten; 8th December 2012 at 07:39 PM.
  Reply With Quote
Old 8th December 2012, 08:47 PM   #18
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally Posted by sreten View Post
12mm stock gives just under 4L, some stuffing and
lining might get effective box volume up somewhat.

I have plans for these, updating the OK but insipid power
handling bassmid, currently investigating driver options.
The Silver Flute W14 may be suitable (if not too expensive). I am currently working on a design that puts 2 of them in 10 litre.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 9th December 2012, 06:12 AM   #19
system7 is offline system7  United Kingdom
diyAudio Member
 
system7's Avatar
 
Join Date: Aug 2008
You're missing the all-important bass cutout size here, sreten! An estimate of tweeter cutout and room for mounting plate would be interesting too. I suppose it's about 100mm on the bass cutout.

Few 4" woofers:
Peerless 830870 HDS 106 PPB MidWoofer Speaker
SB Acoustics :: 4? SB12NRX25-4
H1152-08 CA12RCY

Eekels Mini might indeed be a useful start.
Eekels' Mini

BTW, be very interested to see what Mordaunt Short did in those MS20i Pearls of yours on crossovers, since I have a pair of MS plastic basses lying about. Fancy starting a thread on them?
__________________
Well, there it is! Best regards from Steve in Portsmouth, UK.
  Reply With Quote
Old 9th December 2012, 08:45 AM   #20
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally Posted by system7 View Post
Peerless 830870 HDS 106 PPB MidWoofer Speaker
You can rule that one out. It was my 1st choice when i started working on the small MTM with the Silver Flute (since i''m sitting on 2 dozen of them) but they need a much bigger box (they work VERY well in the 32" ML-TL they were aquired for)

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
I just setup my mimiwat n3 with a pair of Energy cb-20 speakers jerrynsr Tubes / Valves 17 2nd October 2011 01:22 PM
1 pair Auricaps 2.2uf new. $20 bigaudioscotto Swap Meet 2 22nd October 2010 04:13 AM
WTB pair of UTC a-20 danrap Swap Meet 1 2nd September 2010 01:17 AM
WTB pair of UTC A-20 raiatea Swap Meet 0 28th February 2010 11:41 AM
UTC A-20 Transformers (Pair) wushuliu Swap Meet 2 7th December 2009 08:44 PM


New To Site? Need Help?

All times are GMT. The time now is 06:17 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2