Cornwall Network Comparison. Help needed.

[mungkiman]

I know this topic has been covered in the past, but I need more help.

I have a pair each of Cornwall Type B (below) and B2 (above) networks,

and wonder (other than appearance) what the differences are.

Is one preferred?

Are there driver limitations between them?

I have: K-33-E, K-55-V, & K-77's, and need to decide which pair of networks to have upgraded (hopefully by BEC).

Any knowledge and opinions welcome. Thanks in advance,

Chris

[chops]

I'm not sure what to tell you, but if you want, I can walk you through modding that Type B for 400Hz and 4500Hz crossover points if you decide on using Bob's CT125s and a larger squawker horn. It could look a little something like this....

[whamo2]

Yeah I've got the b2 networks as well and was wondering if I should

just change the caps out or opt for new networks from BEC. Mark

[Colin]

I had b2 crossovers on my horizontal horn, walnut oiled Cornwalls, back in the day before classic Klipsch corner Khorns. They have a very sharp upper mid-range bump that made them sound live and real, but also harsh and wearing. I have heard both DeanGs crossovers for RF7s and ALKs for Khorns and they both really bring out the best of the Klipsch drivers. [Y]

[Bonder]

Hi Chris,

I'm just in the process of upgrading my B-2 network on my 82 CW's and have recently asked the same question to BEC.

In my situation I have the K51V driver which was only used for a couple of years. I was looking at the possibility of making the 400 HZ mod Chops has recently done on his B network however it's not clear whether the K51V driver can adequately handle this frequency. Even if the K51V could handle the 400 HZ mod I don't believe the B-2 mod has been created (Would be breaking new ground).

I don't believe there's anything wrong with the B-2 network it's just not very common, therefore the B network is a better choice (IMO) as it has proven mods more readily available from people like BEC.

For now I'm simply going to refresh my caps, install a Pyle Pro Horn as Chops has recently done and see what kind of results I get.

I'm sure there are others who are much more knowledeable that will chim in.

Shayne,

[chops]

Honestly, I have no clue about the Type B2 network. I don't know what that huge cap is for, or that inductor for that matter. And then there's the question of the other two caps side-by-side.

Does anyone have the specs on the B2?

I know the Type B is a 1st order network with crossover points at 600Hz/6000Hz.

My modded Type B's (now called Type CS) has crossover points at 400Hz/4500Hz.

[Dflip]

I have: K-33-E, K-55-V, & K-77's, and need to decide which pair of networks to have upgraded (hopefully by BEC).

Your speakers are those used in the Cornwall 1's which use the B-network. This network uses a 2.0 and 4.0 uF cap and a 2.5 mHy inductor. The B-2 network uses a different tweeter, midrange and woofer.

[formica]

Your speakers are those used in the Cornwall 1's

which use the B-network. This network uses a 2.0 and 4.0 uF cap and a

2.5 mHy inductor. The B-2 network uses a different tweeter, midrange

and woofer.

Different midrange i believe (B-2 = K-51 ?) as that's the combo i

have... OTOH tweeter and woofer were the same K77 and K33.

[BS Button]

Just put B-3's in there..

[Guinness]

Mungkiman,

Check out this thread..... http://forums.klipsch.com/forums/thread/568502.aspx

I suggest you change the caps. Opinions vary as to which brand of caps to use (understatement of the year).

[mungkiman]

Thanks all. Anyone need a pair of B2's? $100/pr. + crating/shipping.

First shot goes to m00n if he is interested.

Chris

[Frzninvt]

You can't just drop a B-3 network in there it was designed around the K-57K midrange shortly before the transition to the Cornwall II. The Cornwall 1.5 as it is known.

[Deang]

Surprises me to see some that still have the energy to repeat themselves.

[mungkiman]

And I am grateful...

[BS Button]

You can't just drop a B-3 network in there it was designed around the K-57K midrange shortly before the transition to the Cornwall II. The Cornwall 1.5 as it is known.

Why not?

[jwc]

You can't just drop a B-3 network in there it was designed around the K-57K midrange shortly before the transition to the Cornwall II. The Cornwall 1.5 as it is known.

Friz

If I'm not mistaken, the B-3 network was seen used with other drivers besides the K57. I believe Todd's Cornwall 1.5 has a K52. My Corn 1.5 had the K57 K and B-3. What a screwed up transition.

The B, B-2, and the B-3 all used the T2A autoformer and the same taps. Therefore I would think the K55, K52 and K57 would have "SIMILAR" sensitivities. I can't remember, was the K53 used in the Corn 1.5? Maybe that was just the Heresy2 and Chorus.

The K51 was even a more rare breed. At this point I think I've got the drivers all screwed up in my head.

I have used the B-3 with the K55 and it sounded fine. Todd seems to think the B-3 sounds good with the K52. I think you could get by with the B-3 as long as the K77 (or CT125) is in there.

jc