JBasham

Hello djk: I don't know if you have read the other thread I started recently about my high treble with a Heresy 1. I have a nasty peak centered at about 6.3 kHz. I've tried moving the tweeter and midrange down one tap each on the autoformer and putting a 16 ohm resistor accross the midrange, but the peak is still there from about 5 kHz to 8 kHz. I was going to try the P-Trap on the squawker next. Do I leave the taps down one and the 16 ohm R on the squawker? Thanks as always for sharing your knowledge about this speaker. Jamey.

Do you guys replace both caps in each (Type E) crossover or just the one closest to the tweeter in the circuit?

John, thanks. I did not try the first crossover mod you posted, because the closest inductor I have is 2.7mh, instead of 2.2. I tried the second mod, moving both the squawker and the tweeter down one notch on the autoformer (to 1 and 2, respectively) and putting a heavy 16 ohm resistor accross the squawker terminals. The results were weird. The peak is still there. The low end dropped a little, but the high end got a little bigger. Here are the stock crossover measurements compared to the modified crossover measurements: Stock Modified 2.5 kHz +4 db +3.5 db 3.15kHz +6.5 db +3.5 db 4 kHz +6 db +3 db 5 kHz +7 db +11 db 6.3 kHz +11 db +12 db 8 kHz +8.5 db +13 db 10 kHz +5.5 db +5.5 db 12.5 kHz -5 db -5 db 16 kHz -5 db -5 db 20 kHz -9 db -9db I also went back and dropped the tweeter another tap on the autoformer, from 2 to 1 (leaving the squawker at 1 and the 16 ohm resistor in place). That knocked a couple of db off the peak at 5-8 kHz, but it was still pretty nasty, and it of course deepened the rolloff from 12.5 kHz to 20 kHz. I thought maybe this problem might be a 16 ohm SET thing, but I re-ran the measurements using an 8 ohm push-pull 6BM8 amp instead, and got the same readings. What next? Leave the autoformer taps at 2 and 1, but lower the value of the 16 ohm resistor? Leave the 16 ohm resistor, but add the 3uf/0.1mh P-Trap to the squawker? Mortite the squawker horn? Order 2.2mh inductors and try the first mod you posted? Replace both 2uf caps on each crossover to check whether they're bad? Thanks for bearing with me. Jamey.

Dean, I was using the 16 ohm tap on the amp output trannys based on djk's posts that the Heresy 1 was suitable for the 16 ohm tap -- perhaps I misconstrued his advice? The sqwakers do indeed have spring terminals. What's the issue with this particular driver? Am I screwed? Thanks, Jamey.

I have a pair of Heresys with K77M ceramic tweets (rediaphramed), K55V squawkers, and K22E woofers. The crossover is stock E. My thanks to you guys, especially djk, for turning me on to the possibilities of these speakers. I just got these set up in my A system to replace a pair of Adire HE10.1s. On 18 inch heavy steel stands, toed in maybe 15-20 degrees, they sound nice. Imaging is solid and soundstaging is wide and deep. But the treble is measuring high. I'm not sure whether I have a speaker problem or a measurment problem, so I thought I'd ask the experts. I used the Stereophile test CD and a Rat Shack SPL meter to check the frequency response. I'm using a sub, and things are reasonably flat from 31.5 Hz to 2 kHz -- a couple places where things are up or down 4 db, but mostly within 2 db. But the treble is measuring a little differently: 2.5 kHz +4 db 3.15kHz +6.5 db 4 kHz +6 db 5 kHz +7 db 6.3 kHz +11 db 8 kHz +8.5 db 10 kHz +5.5 db 12.5 kHz -5 db 16 kHz -5 db 20 kHz -9 db This is at an 80db baseline for 1 kHz, C weighted, slow setting. The measurement results are "corrected" at each frequency by the generally-accepted db adjustments for the Rat Shack meter I use. The Adires were not perfect either, but they were much flatter through the treble decade. Oh, amplification is DIY SET 300Bs, using Magnequest output transformers on the 16 ohm tap. Any thoughts?

I removed my tweeters in my Heresys, to send them out for new diaphrams. Now I'm putting them back in, and I forgot to take notes of the polarity for reconnecting them to the crossover. Positive goes to 8, right? It appears to be color-coded on the crossover terminal marking scheme that way.

Hi. I have been rolling 6N1P tubes lately. The older ones sold as 6n1p-EB or -EV, or sometimes 6HP-EB or -EV, sound a lot better. Hard to find sometimes; usually cost about $7 each. Worth scrounging for.

I just acquired a pair of Heresy I's only to find the K-77-M tweeters aren't playing - the terminals measure no continuity with an ohm meter. Some have suggested I get the diaphrams replaced (by Simply Speakers) as a fix. Others have suggested I replace the tweeters with K-77-M's or EV T-35's. Any thoughts? Also, am I looking for 8 ohm or 16 ohm diaphrams/tweeters? I specifically bought the Heresy I's because people say they have a high-ish impedence suitable for the 16 ohm tap on my 300B SETs, and I don't want to mess this up. Thanks.