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Another Electro Voice Interface D Restoration Thread

@MCM_Fan I have a nice AK'er who is donating an Interface B eq, and I have Sentry VI's. To recap, I'll need to change those 4 resistors in value, PLUS need to remove that high pass 11k resistor?? Is this right, sir??
 
Hi MCM_Fan, the Interface D VMR must have a DC resistance of over 8 Ohm.
If you decide to biamp your speaker that the Eq becomes less critical, just change the 4 resistors so you get a 31Hz filter.
The differences are then in the top of the EQ. An interface B by default increases the 10Khz portion and in two steps (the filter switch) decreases that.
This is ugly as in the neutral position the eq first gains and then attenuates 10k and above.
The part responsible for this is a 11k resistor in series with a 1.2NF cap, remove one of the two and the HF gain filter is gone.

Hey PeterSchut, if I want to power these with one amp, it would be preferable to remove that 11k resistor, yes??
And if I bi-amp, using the twin inputs, then not as needed, since I could run the eq only on the low end??

Thank you for your help, and great posts.
 
Hey PeterSchut, if I want to power these with one amp, it would be preferable to remove that 11k resistor, yes??
And if I bi-amp, using the twin inputs, then not as needed, since I could run the eq only on the low end??

Thank you for your help, and great posts.
That is correct
Cheers
 
FYI for EV Interface users. I have a good lot of the EQ boxes I have just put op for sale. There seems to be 3 versions. I will be opening up one of each of the 3 models to see if there are any differences other than the printing on the box. once I do I will post the images. Here's the units though. They are up for sale for $99 each in our ebay store for now. We are shipping new factory sealed boxes, not these opened onesev-interface-a-2-wm.jpg ev-interface-a-2-wm.jpg ev-interface-a-5-wm.jpg ev-interface-a-8-wm.jpg ev-interface-c-1-wm.jpg ev-interface-c-3-wm.jpg ev-interface-c-6-wm.jpg
 
FYI for EV Interface users. I have a good lot of the EQ boxes I have just put op for sale. There seems to be 3 versions. I will be opening up one of each of the 3 models to see if there are any differences other than the printing on the box. once I do I will post the images. Here's the units though. They are up for sale for $99 each in our ebay store for now. We are shipping new factory sealed boxes, not these opened onesView attachment 1970099 View attachment 1970099 View attachment 1970100 View attachment 1970101 View attachment 1970102 View attachment 1970103 View attachment 1970104
Are you selling EQs that are direct replacements for the Interface D? I need one.
 
Hey folks,

Hope it's ok to resurrect this thread. I just came into a pair of Interface D's with the EQ today after waiting a couple years for an older collector I know to sell his. I purchased a pair of JBL 4425s off of him two years ago and he mentioned he had this pair which he finally agreed to sell now. They are in very nice shape with minimal wear for their age so needless to say, I'm thrilled.

I just have one question though, as both speaker taps on the back are 8ohm, is it possible to run a tube amp into one set and a solid state into the other? Provided you aren't feeding signal through both at the same time? I assume this was for bi-amping but I'm curious if that would work.

Thanks in advance. : )
 
Hey folks,

Hope it's ok to resurrect this thread. I just came into a pair of Interface D's with the EQ today after waiting a couple years for an older collector I know to sell his. I purchased a pair of JBL 4425s off of him two years ago and he mentioned he had this pair which he finally agreed to sell now. They are in very nice shape with minimal wear for their age so needless to say, I'm thrilled.

I just have one question though, as both speaker taps on the back are 8ohm, is it possible to run a tube amp into one set and a solid state into the other? Provided you aren't feeding signal through both at the same time? I assume this was for bi-amping but I'm curious if that would work.

Thanks in advance. : )

Congratulations on a fine set of speakers. To answer your question, yes, the speaker taps are for bi-amping.

Pictures are always fun.
 
Congratulations on a fine set of speakers. To answer your question, yes, the speaker taps are for bi-amping.

Pictures are always fun.
Thanks! I'm thrilled to have these. Here's a quick living room photo. Am shuffling a bit of gear around before I hit the hay but will try to post more tomorrow after work.
 

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Thanks! I'm thrilled to have these. Here's a quick living room photo. Am shuffling a bit of gear around before I hit the hay but will try to post more tomorrow after work.

Very very nice. I'd try to put some acoustic foam or sound deadening against each wall where first reflections hit from that baby buttcheek tweeter, otherwise, looking good!
 
That's definitely one of the next steps. I had to see how the wife would react to these massive, 114lb beauties in our living room first. She didn't even notice them for about 5 hours and then when she saw them she was like, "Whoa, you could have a serious party with those."
 
After running these with the Citation 16 and First Watt B1 which were dead quiet, I hooked up the EQ today and noticed an audible hiss. Any suggestions on to minimize this? I had read elsewhere that the EQ could be a bit noisy. Would a recap of the EQ help with this?
 
After running these with the Citation 16 and First Watt B1 which were dead quiet, I hooked up the EQ today and noticed an audible hiss. Any suggestions on to minimize this? I had read elsewhere that the EQ could be a bit noisy. Would a recap of the EQ help with this?

An exceptionally nice fellow on these boards rebuilt my own eq from scratch with fine components.

Still some hiss. I would say the EV Sentry VI is to be used like a 114 lb speaker should, and that is rather loudly.

So, close, near-field isn't their strong suit. Me, I quit using that EQ awhile back, tho it does push that low end up a bit.

I don't own the plates to block off that port, which is what one is supposed to do with the EQ, so it all kinda worked out.
 
OH, I never answered ya about those taps.

Yes, you can run SS on the low end, and a tube amp on the highs. There was some type of funky plug that was meant to be inserted to bypass the internal crossover, I believe, but those are rare as hen's teeth.
 
An exceptionally nice fellow on these boards rebuilt my own eq from scratch with fine components.

Still some hiss. I would say the EV Sentry VI is to be used like a 114 lb speaker should, and that is rather loudly.

So, close, near-field isn't their strong suit. Me, I quit using that EQ awhile back, tho it does push that low end up a bit.

I don't own the plates to block off that port, which is what one is supposed to do with the EQ, so it all kinda worked out.

Thanks again. After having these speakers for a few months now, I absolutely love them. I've got them running with a Mastersounds Radius 2 preamp mixer and a Fisher 680 tube amp and size aside, they literally disappear into the room. I NEVER feel like I'm listening to a speaker and that is a huge compliment. For the first time in years, I feel like I'm no longer chasing a sound. Keepers for sure.
 
Thanks again. After having these speakers for a few months now, I absolutely love them. I've got them running with a Mastersounds Radius 2 preamp mixer and a Fisher 680 tube amp and size aside, they literally disappear into the room. I NEVER feel like I'm listening to a speaker and that is a huge compliment. For the first time in years, I feel like I'm no longer chasing a sound. Keepers for sure.

I'm not an SPL goof anymore, but you have to love the plate on the back of the cabinet warning of high spl.

Bad Ass.
 
bought a pair at a garage sale with Hitachi pre amp and amp combo for $120... what a steal at first I thought they were junk till I picked them up.. recently upgraded to Adcom gfa5800 cant wait for the crossovers and woofer refoam to be done to hear these monsters. really wish I could find the equalizer or somebody to really simplify this. talked to a very knowledgeable guy and he couldn't figure out how to convert these for us. if anyone makes one, please make a step by step video on YouTube. me and my pops would sure appreciate it. first few post on the subject with pictures and what not makes sense but after that I'm very lost.
 
bought a pair at a garage sale with Hitachi pre amp and amp combo for $120... what a steal at first I thought they were junk till I picked them up.. recently upgraded to Adcom gfa5800 cant wait for the crossovers and woofer refoam to be done to hear these monsters. really wish I could find the equalizer or somebody to really simplify this. talked to a very knowledgeable guy and he couldn't figure out how to convert these for us. if anyone makes one, please make a step by step video on YouTube. me and my pops would sure appreciate it. first few post on the subject with pictures and what not makes sense but after that I'm very lost.

First, WELCOME TO AUDIOKARMA!!!

Second, that's a HELL of a score. How in the world could you think they were junk?? The cabinets scream quality.

Please post pics. As for the crossovers, it's not hard to convert them, and there's a guy on Ebay that had done so to a few. If I remember correctly, there's only 4 resistors to change out.

I got lucky and had another AK'er do it for me.

Post those pics, and don't be afraid to ask questions.
 
First, WELCOME TO AUDIOKARMA!!!

Second, that's a HELL of a score. How in the world could you think they were junk?? The cabinets scream quality.

Please post pics. As for the crossovers, it's not hard to convert them, and there's a guy on Ebay that had done so to a few. If I remember correctly, there's only 4 resistors to change out.

I got lucky and had another AK'er do it for me.

Post those pics, and don't be afraid to ask questions.
Yes very good deal well when someone has a price tag for $120 you can’t expect much. At the time got them for the amp little did we know on the goldmine we came across. Ya I’ve been looking for the eq since I bought them last year no luck.
 
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