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Klipsch Heresy Series I Manual & Data Sheet


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5 hours ago, M_Klipsches said:

As others have noted H1.5 isn’t a Klipsch designation, but it is the bridge between H1s & HIIs, with old style plywood cabinets but different Xover (E2) and I think, different mid & woofer. Made from 83-‘85(?) To my ear they sound better than my other pair of 1980 HIs. 

 

Today I learned that my Heresy Is are actually Heresy 1.5s.

I put together this table to distinguish between the Heresy I, Heresy 1.5, and Heresy II:

 

Heresy I

Heresy 1.5

Heresy II

Cabinet construction

Baltic Birch

Baltic Birch

MDF

Rear panel

Removable back panel

Removable back panel

Fixed back panel

Driver mounting

Drivers are mounted on the rear of the mortarboard

Drivers are mounted on the rear of the mortarboard

Drivers are mounted in rabbets on the front of the mortarboard

Network type

E
(or C for early models)

E-2

E-2

Network mounting

on board

on board

on PCB on terminal cup

Tweeter

K-77/cast zinc lens

K-77/cast zinc lens

K-76/plastic lens

Mid-range

K-55/700

K-55/700 or K53/701

K-53/701

Woofer

K-22

K-22 or K-24

K-24

 

 

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Thanks very much for your helpful table, Dave. So, it basically boils down to the Series I with an E2 Network Type, as mboxler stated in a previous post.

 

Good to know. I'll have the answer when examining my crossovers once I open my cabinets. Although, according to what M_Klipsches posted, they can't be Series 1.5 speakers since my models were purchased in 1979.

Edited by Mike Weaver
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17 hours ago, Mike Weaver said:

Ha ha, that sounds like a dare... I may just take you up on that challenge. *Looks for a Phillips screwdriver*

 

By the way, since we're on the subject... which Heresy series do Klipsch enthusiasts generally consider the best? Are the current IVs better than previous versions, or are there merely nuanced differences between all of them?

 

i think that most (by a significant margin) would consider the heresy iv the best heresy.  the heresy 1/1.5 were unique in that they were so easy to modify, so i think there's a good argument that they're the most fun.

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As is to be expected from Klipsch. They're one of those companies which take great pride in their products and constantly strive to improve them.

However, there's always the aspect of product degradation to consider. Unless it's possible to refurbish them using the exact same components, we'll likely never know how well a freshly unboxed set of HIs really performed back then. Then again, the difference in sound quality between the Series I and IV is possibly pronounced enough to make that a moot point.

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Under NO CIRCUMSTANCES should you open up your Heresies.

 

You'll let out the vintage air and permanently change the sound-for the worse!

 

I do have replacement air in stock, but it's expensive and if you have to ask the cost,

you can't afford it. 😚

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On 10/13/2024 at 11:37 PM, Dave MacKay said:

 

Today I learned that my Heresy Is are actually Heresy 1.5s.

I put together this table to distinguish between the Heresy I, Heresy 1.5, and Heresy II:

 

Heresy I

Heresy 1.5

Heresy II

Cabinet construction

Baltic Birch

Baltic Birch

MDF

Rear panel

Removable back panel

Removable back panel

Fixed back panel

Driver mounting

Drivers are mounted on the rear of the mortarboard

Drivers are mounted on the rear of the mortarboard

Drivers are mounted in rabbets on the front of the mortarboard

Network type

E
(or C for early models)

E-2

E-2

Network mounting

on board

on board

on PCB on terminal cup

Tweeter

K-77/cast zinc lens

K-77/cast zinc lens

K-76/plastic lens

Mid-range

K-55/700

K-55/700 or K53/701

K-53/701

Woofer

K-22

K-22 or K-24

K-24

 

 

While this is mostly correct, my Heresy IIs, given to me by my son Josh @Invidiosulus a long time ago, is made of birch ply. At least the front and back panels. The sides, top and bottom could be mdf, but I can't see the  edges on those.

 

Also, the birch used on the earlier Heresy builds was iirc, a seven ply from Georgia Pacific. Andy, who worked for Klipsch and built lots of them, posted the pertiment details a long time ago. I'll try to look it up.

 

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  • 2 weeks later...
On 10/19/2024 at 8:09 AM, Marvel said:

While this is mostly correct, my Heresy IIs, given to me by my son Josh @Invidiosulus a long time ago, is made of birch ply. At least the front and back panels. The sides, top and bottom could be mdf, but I can't see the  edges on those.

 

Also, the birch used on the earlier Heresy builds was iirc, a seven ply from Georgia Pacific. Andy, who worked for Klipsch and built lots of them, posted the pertiment details a long time ago. I'll try to look it up.

 

 

can you post some pics of your heresys?  my understanding is that heresy ii were made of mdf.  how could you tell the back panel was birch since they're not removable on heresy ii?

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On 10/31/2024 at 12:04 PM, jcn3 said:

 

can you post some pics of your heresys?  my understanding is that heresy ii were made of mdf.  how could you tell the back panel was birch since they're not removable on heresy ii?

I took out the rectangular input cup. I'll search for the pics I took when I replaced the caps. If I need to I will pull one of those and sand off the edge to where it would be more visible.

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When Josh gave them to me they didn't have the stickers on the back, but the inspection tag stapled inside indicates 1989, so they certainly weren't the early HIIs.

 

 

Screenshot_20241101-202344_Photos~2.jpg

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