Pretty Persuasions - InDIY Coax Build Thread

[JavadS]

[KEtheredge87]

Lookin good bud! I need to get to this stage of my own project to allow enough time for the crossover work. I'm getting more excited every week to hear everyone's designs. I'm especially interested to see how the horn loaded compression drivers do, since I've never messed with them before.

I see you went for the 90 uF polypropylene cap on the mid section, and used a 150 uF NPE cap for the woofer. Any reason you chose NPE for the woofer besides size / price? I'm still trying to learn when to make the trade-off between component cost and project sound. I know there's loads of opinion posts where folks try to compare NPE to poly caps, so I don't intend to interject one of those discussions here... just curious about your design process. Thanks in advance!

[JavadS]

I see you went for the 90 uF polypropylene cap on the mid section, and used a 150 uF NPE cap for the woofer. Any reason you chose NPE for the woofer besides size / price? I'm still trying to learn when to make the trade-off between component cost and project sound. I know there's loads of opinion posts where folks try to compare NPE to poly caps, so I don't intend to interject one of those discussions here... just curious about your design process. Thanks in advance!

[KEtheredge87]

Hey Keith! Only because it’s a series inline component and not a parallel shunt component, I’m not sure if it makes a difference but they were only $25 and they’re fun to hold and look at =)

Dude... the lightbulb just turned on in my head! I had heard folks talking about components being in the signal path or being a shunt component before, but I hadn't really appreciated the impact that would have! Thanks!

[Wolf]

Be advised- if it's in the circuit, it's in the signal path. This is AC circuitry, and audiophools don't understand that all parts matter.

Later,
Wolf

[craigk]

Be advised- if it's in the circuit, it's in the signal path. This is AC circuitry, and audiophools don't understand that all parts matter.

Later,
Wolf

110 % correct.

[KEtheredge87]

Be advised- if it's in the circuit, it's in the signal path. This is AC circuitry, and audiophools don't understand that all parts matter.

110 % correct.

Well then... I shan't be labeled an Audiophool! I'll start looking for some AC circuits and speakers "for dummies" references to bring myself up to speed

[JavadS]

This is AC circuitry, and audiophools don't understand that all parts matter.

[JavadS]

Got the crossovers finalized and tested today, I ended up tweaking the lpad once I had components soldered in place on the board.



I increased R1 to 2 ohms and R3 to 5.6 to get response back to where I wanted it. Basic layout





And loaded up input and output leads



Woofer spade terminals



Mid push terminals



Binding post input leads





Thanks!
Javad

[cap]

Great thread ! As a wood worker of 35 years I can appreciate the skill.. The knowledge of the x overs and such is always cool

[skatz]

Javad,
on your XO on the right there are two coils parallelnto each other and fairly close. Why not change the orientation of one to decrease interaction?

[craigk]

Javad, is this how your company builds high performance car parts ? Ben's comments matter because somehow people think that parallel parts in a crossover don't contribute to the sound. Everything in the circuit contributes. Your answer is a little arrogant.

[JavadS]

Javad,
on your XO on the right there are two coils parallelnto each other and fairly close. Why not change the orientation of one to decrease interaction?

Thanks for the comment, yea I can they are about 4" apart and the response of this crossover is identical regardless of how I orient the coils, I did test it. Thanks!

[JavadS]

Javad, is this how your company builds high performance car parts ? Ben's comments matter because somehow people think that parallel parts in a crossover don't contribute to the sound. Everything in the circuit contributes. Your answer is a little arrogant.

Craig your response is a little inflammatory, but you know I love you so I won't take the bait =) My point was, IF you can hear the difference between a electrolytic cap or a MKP or a foil cap or a $5 cap or a $100 cap, it only matters if you hear the difference. That's not arrogant, that's matter of fact, it's in agreement with what Ben said and simply a clarification, no need to demonize it.

I'd like to politely ask we keep the thread on topic, really not looking to get into a superficial back and forth about semantics, I can safely say I am in agreement with what Ben said and stand behind my clarification.

Thanks,
Javad

[JavadS]

Great thread ! As a wood worker of 35 years I can appreciate the skill.. The knowledge of the x overs and such is always cool

Thanks I appreciate the comment, and thank you for following along!

Javad