[James Tanner]

James,

Isn't the coincidental arrangement of the tweeter and midrange driver a Jim Thiel invention?  I seem to remember that he pioneered that concept but could be wrong.  I know that the great soundstage you are hearing is a Thiel hallmark.

Bill

Hi Bill,

I know Jim Thiel worked with it for many years but I do not think he invented it.  KEF has also used it for many years and Tannoy forever.

james

[SHV]

If anyone "invented" it was probably Tannoy.  Bozak (remember them???) also had several models that had a "Tannoy" type of arrangement.

Steve

[gtaphile]

Not sure about coincident drive arrangements but I believe Altec introduced the first coaxial in the 604 arangement in 1943.

If anyone "invented" it was probably Tannoy.  Bozak (remember them???) also had several models that had a "Tannoy" type of arrangement.

Steve

[VOLKS]

James...........whats your opinion of them so far?

[James Tanner]

James...........whats your opinion of them so far?

Great sound stage , huge dynamic capability, very efficient, takes soft to loud differences in dynamic levels in stride, presents a more distant sound stage than say the Thiels.

James

P.S.
These are the very pair that John Atkinson reviewed in Stereophile.

P.P.S.
Oh - and they weigh a TON!

[SHV]

Not sure about coincident drive arrangements but I believe Altec introduced the first coaxial in the 604 arangement in 1943.

Then Altec 604 from 1943 is the earliest commercial "coax" that I could find....the Tannoy "Dual Concentric" coax was introduced in 1946.

Steve

[HsvHeelFan]

Great sound stage , huge dynamic capability, very efficient, takes soft to loud differences in dynamic levels in stride, presents a more distant sound stage than say the Thiels.

James

P.S.
These are the very pair that John Atkinson reviewed in Stereophile.

P.P.S.
Oh - and they weigh a TON!

James,  can you clarify the "more distant soundstage" comment compared to Thiels?

Do you mean that you're sitting farther back in the concert hall or something else?

With my KEF Q70's, the soundstage is "right there" in the room with you.  Most people would probably say that my KEFs are a bit "forward".

HsvHeelFan

[James Tanner]

Hi,

Yes I meant I feel as if the soundstage moved a little further back from me when listening to the KEF's as compared to the Thiels. I assume it has to do with the difference in polar response and dispersion characteristics of the given speakers.

james

[Sasha]

Hi,

Yes I meant I feel as if the soundstage moved a little further back from me when listening to the KEF's as compared to the Thiels. I assume it has to do with the difference in polar response and dispersion characteristics of the given speakers.

james

James,

How do in your opinion polar response and dispersion characteristics affect perceived soundstage distance?

[James Tanner]

James,

How do in your opinion polar response and dispersion characteristics affect perceived soundstage distance?

Hi Sasha,

I find depending on the early reflection characteristics of a given speaker it tends to move the apparent soundstage forward or back.  For instance I now have the Roger Sanders speakers set up in the same room and being a dipole the sound stage starts at the speaker and moves backwards.  With the Thiel in the same position the soundstage projects forward from the speakers.

I am assuming that some of the early reflections and wider dispersion pattern in the Thiels is the reason for this affect in my room?

james

[vegasdave]

Hey James, are those 2 12s on the KEF References?

[James Tanner]

Hey James, are those 2 12s on the KEF References?

Model Model 207/2
Design Bass reflex four-way floorstanding loudspeaker, magnetically shielded
Drive Units 2 x 250mm (10in.) LF, 1 x 250mm (10in.) LMF, 1 x 165mm (6.5in.) Uni-Q MF including a 25mm (1in.) titanium HF
Crossover Frequencies 120 Hz, 350 Hz, 2.3 kHz
Sensitivity (2.83V/1m) 91dB
Frequency Response (+/-3dB) 40Hz - 60kHz
Maximum Output 117dB
Amplifier Requirements 50 - 400 W
Magnetic Shielding Yes
Impedance 8 Ohms (3.0 Ohms min)
Bass Extension 26Hz (-6dB)
Weight 66 Kg (145 lbs)
Dimensions (H x W x D) 1226 x 400 x 685 mm (48.2 x 15.7 x 27 in.)
Finishes Piano Black, High Gloss American Walnut, High Gloss Cherry, Satin Black, Satin American Walnut, Satin Cherry and Satin Sycamore real wood veneers

[vegasdave]

Do those 10s kick pretty good?

[James Tanner]

Do those 10s kick pretty good?

Hi Dave,

Yes they are very good - tight and deep with excellent control.

I know where your coming from though - I have a friend - (big JBL Fan)- who says "if its smaller than a 15 inch it's a tweeter"

james

[Laundrew]

Hi Dave,

I have a friend - (big JBL Fan)- who says "if its smaller than a 15 inch it's a tweeter"

james

I have heard this somewhere before

Be well...

[James Tanner]

I have heard this somewhere before

Be well...

Ron at Altronics

james

[Laundrew]

Ron at Altronics

james

 

Be well...

[Napalm]

Mhhh looks like KEF are now specialists in the aesthetics of ugliness...

Nap. 

[vegasdave]

Hi Dave,

Yes they are very good - tight and deep with excellent control.

I know where your coming from though - I have a friend - (big JBL Fan)- who says "if its smaller than a 15 inch it's a tweeter"

james

Cool, and exactly. As you told me before, big woofers are not a problem to drive with your amps.

[V]

I know where your coming from though - I have a friend - (big JBL Fan)- who says "if its smaller than a 15 inch it's a tweeter"

james

The Montana Master Reference speakers have each two 18" inch woofers.