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JBL HDI-3600 Crossover Upgrade: Mundorf

Hi guys, I have a new-to-me pair of HDI-3600 and would like to turn a great pair of speakers into a super pair of speakers. Having a look at the stock crossovers, lots of room for improvement, I think JBL could have done a better job frankly given the cost of these - no-name electrolytics (par for the course) and no-name film which appear entry level in the HF.

Question is, moving these caps and resisors to Mundorf options leave me with small variances in values. I am not thinking these variances would make any significant difference, but interested in folks’ opinions.

Here is what I am looking at - replacement value + originating value for both caps and resistors:

Product+value Original Value Application

MCap Supreme
1.8uF(600V) 1.8 HF

MCap Supreme
3.9uF(600V) 4 HF

MCap EVO
22.0uF(450V) 24 HF

MCap MKP (250V)
15.0uF(250V) 15 LF

MCap MKP (250V)
22.0uF(250V) 23 LF

MCap EVO
6.8uF(450V) 6.2 & 6.8 HF & LF

MCap EVO
15.0uF(450V) 14 HF

MR10 Metal-Oxide Film Resistor
2.2Ohm 10W2R4J HF

MR10 Metal-Oxide Film Resistor
3.9 10W4R3J HF

MRES20 MResist Supreme Resistor
10Ohm 25W10RJ HF

 

Any thoughts or wisdom from experience? Notice I am considering vanilla MKP on LF and Supreme/EVOs on HF..

 

Thanks!

rickysnit
nonoise's avatar
nonoise
10,838 posts
 

This video should inspire you in your search for a better crossover:

All the best,
Nonoise

rickysnit OP
79 posts
 

All great points Erik. One thing to consider, I've had some decent results from the Mundorf Plain elecs, in fact I'd fairly highly recommend them for electrolytic applications. Maybe I will consider a change to the overall bill of materials.

You're right, it is a lot of coin, although I know I'd be jumping from a $4-5k speaker sound to maybe closer to a $10k one.

Separately, Mundorf, I love the brand. I just built XLR interconnects this afternoon with their 18awg SilverGold wire - it's the best cable I've ever heard - in my system or elsewhere. You pay, but disappointments are rare with Mun I've found.

 

c_avila1
185 posts
 

Can we have an update on this project?

You would be changing the values of too many components that you risking having peaks and dips in the response. Room correction might compensate for faults, but I'd stick to the original values and add Duelund / VCap CuTF decoupling caps at .01uf or .1uf to the stock caps you couldn't replace.

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