Search found 2552 matches

by chris661
Tue Jun 22, 2010 4:16 pm
Forum: General Vinyl
Topic: Vinyl Musings
Replies: 29
Views: 15528

Hmmm...

I tend to scour charity shops for records. Many of them cost less than £1, so, even if they sound awful, I can make novelty hats with them (melt them with boiling water, mould them to a dish).
by chris661
Tue Jun 22, 2010 4:08 pm
Forum: Assorted Stuff
Topic: Table saw ?
Replies: 57
Views: 12626

What you mean to say is - "I was just making sure people were reading it properly..."
by chris661
Tue Jun 22, 2010 3:46 pm
Forum: Beginners
Topic: DIY Speaker Build Help - Interest Check.
Replies: 56
Views: 26550

Should we start a "Post your calculator here" thread?
by chris661
Tue Jun 22, 2010 3:43 pm
Forum: Assorted Stuff
Topic: DSL Speed
Replies: 58
Views: 18563

Try it at around 7 in the evening...

Really slow.
by chris661
Tue Jun 22, 2010 3:41 pm
Forum: Assorted Stuff
Topic: Table saw ?
Replies: 57
Views: 12626

203mm = 8". I hope you ordered the right ones...
by chris661
Tue Jun 22, 2010 1:21 pm
Forum: Assorted Stuff
Topic: Table saw ?
Replies: 57
Views: 12626

Looks like the sort of thing that will carry on working no matter what.
by chris661
Tue Jun 22, 2010 1:13 pm
Forum: Beginners
Topic: DIY Speaker Build Help - Interest Check.
Replies: 56
Views: 26550

My calculator: http://www.sharpdirect.co.uk/content/ebiz/sharp/invt/elw531b/el531_large.jpg Far too many buttons, but taking A-level maths means I should find use for them. It can do stuff that most others can't, so it's really useful in lessons when people are working stuff out with all the bracket...
by chris661
Tue Jun 22, 2010 1:00 pm
Forum: Beginners
Topic: Measurement Basics.
Replies: 49
Views: 19367

Ohms law. Thats still quite popular innit? :-) DTB You'd be surprised - over half of my O-level Physics class either can't recite it, or don't know it's called Ohm's Law - and that's the top set!! I need to get myself some 1950s kit - I've got a couple of things from the '70s, but they're not exact...
by chris661
Tue Jun 22, 2010 10:35 am
Forum: Beginners
Topic: Measurement Basics.
Replies: 49
Views: 19367

Just thought it would be interesting to compare some of the designs in those books to what we have now.

Sounds like I've hit a nerve, so I'll be quiet.
by chris661
Tue Jun 22, 2010 10:13 am
Forum: Beginners
Topic: DIY Speaker Build Help - Interest Check.
Replies: 56
Views: 26550

Here's how I usually work it out... For every +3dB of output, you double the power input. For -3dB, you half it. Starting with a base efficiency of 89dB (from the MS website), the impedance of the speakers is between 4 and 8 ohm. So, assuming 6 ohms, using (v^2)/R, at 1 volt input, you get 1/6 of a ...
by chris661
Tue Jun 22, 2010 8:10 am
Forum: Beginners
Topic: DIY Speaker Build Help - Interest Check.
Replies: 56
Views: 26550

Possibly, though they seem to need to be listened to from a fair distance (just didn't work in my bedroom, but great in the lounge, where Mum moans about them). If you want to learn more about crossovers and things like that, I can't recommend Elliott's pages enough. http://sound.westhost.com/articl...
by chris661
Mon Jun 21, 2010 10:08 pm
Forum: Beginners
Topic: DIY Speaker Build Help - Interest Check.
Replies: 56
Views: 26550

Sounds loud to me. Cruising along at around 88dB

I'm usually bouncing along at an eigth of a watt. More like 80dB.

Gotta go - more discussion tomorrow.
Chris
by chris661
Mon Jun 21, 2010 7:49 pm
Forum: Beginners
Topic: DIY Speaker Build Help - Interest Check.
Replies: 56
Views: 26550

Oh, something else to consider - what kind of amplifier will you be powering the speakers with? Also... According to this, how loud do you listen? http://www.gcaudio.com/resources/howtos/loudness.html The other (more accurate way) would be to play some music, and measure the voltage across the speak...
by chris661
Mon Jun 21, 2010 7:45 pm
Forum: Speakers
Topic: thoughts from out of nowhere
Replies: 10
Views: 5204

... and yet another innocent thread plunges down to gutter level.
by chris661
Mon Jun 21, 2010 7:10 pm
Forum: Speakers
Topic: A pair of full-range monitors...
Replies: 250
Views: 74437

Mum is also on side now.

E-mail will be sent shortly (I'll sent it to the one on your 'site).

E-mail sent.