Speaker efficiency - theoretical question

Forums

So we've all studied the interesting graphics of the off-axis dispersion of a speaker. Performance can vary. It made me wonder about a somewhat theoretical question, though the issue that raised it was a practical one.

Suppose you have two speaker models. Both measure the same efficiency [edit: as measured by sensitivity] under standard testing (at a fixed point, x distance away, for a given power input). But one has better off axis response. (Let's assume it's true horizontally and vertically, as well as at various frequencies, etc.)

Starting from scratch - with some limitations

So, I've always liked music - both playing and listening to music. My first system was simply Mission speakers/Rotel amp/Philips CD. Then I left that with my parents when I took off for college. After college I got PSB T45/Thule Amp/Thule CD - which I was generally happy with.

Then a combination of moving country and wife not being particularly thrilled about the relative size of the T45's in our then not-so-big apartment made me sell the whole thing.

custom speaker stands from a welder?

Anyone hire a welder to make speaker stands for them?

I am considering this route because shipping to HI is so expensive if I buy nice stands from the mainland.

I figure I can give the dimensions of the top/bottom plates and some kind of column (box or circular) to a welder and have them craft it. I will probably also ask for a hole to be cut out in the rear of column to fill with sand for added mass. Then I will spray paint the stands black.

Should the top plate dimensions be larger than the speaker dimensions, less, or fit the speaker exactly?

Montreal Show Starts Thursday

Montreal Show Starts Thursday

<I>Stereophile</I> is partnering with the <I>Festival Son & Image</I>, to be held in Montreal, Canada, Thursday April 3 through Sunday, April 6. The first day is for trade and press only&mdash;public admission starts on Friday at 11am. More than 120 brands will be demonstrated in rooms on 11 floors of the Sheraton Centre hotel in downtown Montreal, and the Show's keynote speech is being given by Monster Cable's Noel Lee at 10am on the trade day, Thursday April 3.

The (Freudian Id) Stereophile Forums

The (Freudian Id) Stereophile Forums

The <i>Stereophile</i> <a href="http://forum.stereophile.com/forum/ubbthreads.php?Cat=0&C=1">forum</a&gt; has been hot. I don't even know what's happening&#151I'm only the Administrator&#151but two members are really going at it. It's been going on for days. One dude sees things one way, and the other dude sees things in a very different way, and neither wants to meet anywhere near the middle.

Which 2A3c SET amp for my Apogees?

Forums

OK, I got the SET bug.

Today's the day I hook up my new SET 2A3c amp.

The amp is three watts per channel, well, four with 10% THD.

I'll be using it with some Apogee ribbons. The Apogee dips to one ohm resistance, and is 86dB 'sensitive.'

So, if 1 watt gives me 86 dB, but the amp output doubles its output with every halving of the resistance, then...

My four watt amp should give me 8 watts at four ohms, 16 watts at two ohms, and 32 watts at one ohm.

Therefore...

Looking to biamp my Lowthers.

Forums

Hola,

I decided to finally take the plunge and biamp my Lowther DX-3's.

I went out and overspent on a new SET using genuine Western Eclectic 300B's, but now I can't for the life of me find where the tweeter hook ups are on the damned speaker.

I mean, I can find the main speaker hook up, and it looks almost like to goes right the the back of the speaker cone...but I can't find where the woofer and tweeter part diverge so I can hook up the two amps.

A little help?

Advertisement
Advertisement
Advertisement