Klipsch kg4.2 restoration

vilding · « **on:** 4 Jan 2020, 11:55 am »

Hi!
Happy to be here as a total DIY-newbie!

I have a pair of Klipsch Kg4.2 that I find to be surprisingly nice speakers. This winter/spring the plan is to change out the crossovers, brace and dampen the boxes. Maybe add some mass to the bottom plate and the horn. My soldering skills are not impressive so I'll start there, I think, with practice. Just dialing in a bit on the procedure before I start tinkering with the expensive parts.
Since ordering No-rez to Sweden would almost double the price, I kinda need some help with good alternatives. My first thought is 1.2 mm bitumen and open cell foam. Maybe not as good but close enough?

I have a bunch of ideas and things I want to do later on. Building horns with full range drivers, trying OB, etc. I would love to try out the NX-Otica. The problem being the same as with the No rez; taxes and tolls that would almost double the price (of something that would already be a considerable investment). Any way! Good to be here, among fellow crazy people! Looking forward to learning more about this great hobby.

/Hilding

FullRangeMan · « **Reply #1 on:** 4 Jan 2020, 02:38 pm »

Welcome Hilding

Blackmore · « **Reply #2 on:** 4 Jan 2020, 03:06 pm »

Welcome to AudioCircle

bfstrysik · « **Reply #3 on:** 4 Jan 2020, 04:08 pm »

Welcome to AC

Phil A · « **Reply #4 on:** 4 Jan 2020, 06:17 pm »

Welcome!

Wind Chaser · « **Reply #5 on:** 4 Jan 2020, 08:30 pm »

Welcome to Audio Circle!

maty · « **Reply #6 on:** 4 Jan 2020, 08:48 pm »

Quote from: vilding on 4 Jan 2020, 11:55 am

Since ordering No-rez to Sweden would almost double the price, I kinda need some help with good alternatives. My first thought is 1.2 mm bitumen and open cell foam. Maybe not as good but close enough?

https://www.diyaudio.com/forums/multi-way/345074-mdf-plywood-speaker-cabinets-10.html

https://www.diyaudio.com/forums/multi-way/345074-mdf-plywood-speaker-cabinets-post5976867.html

Quote

The inside of the cabinet is lined with 4mm thick bituminous vibration damping panels. Due to the high weight of these panels (and therefore high shipping-costs), they are not included as part of the standard kit but can be supplied if they are not available whereyou live. I used Standartplast STP Aero Bomb but other products such as CTK Vibrodamping, Silent Coat Vibrodamping or DynamatXtreme are equally effective. Apply the damping panels to all internal surfaces except the baffle. It doesn't matter if a few centimeters along the edges of each surface are not covered. The damping panels are self adhesive but I would advise to take extra measures to make sure they stay stuck in place for years to come. First of all, the inside surfaces of the cabinets must bedust and grease free. Then the panels can either be glued using vinyl glue as well as their own adhesive layer. Or you can stickthe panels as they are and then staple them to the cabinets for extra strenght. I chose to do the latter with the help of an electric staple gun.

The soft damping material used in the Calpamos consists of 50mm thick, black polyester fibre acoustic damping sheets. Each sheet is 1000 x 1200mm in size and one whole sheet is needed per loudspeaker cabinet. The damping material covers all internal area's except for the lower part of the side walls near the woofer and also the bottom surface is left free from this soft damping material.