Noob question about driver replacement

[Bryank930]

Sorry for the noob question...I registered here because I couldn't find my answer anywhere else.

I have a set of old Jensen JHS 63 speakers; 6.5" woofer, 2.5"ish mid, 1/2"ish tweeter, in a ported cabinet. On both speakers, the mid and tweeter are dead. No sound and no reading when checking resistance.

My question is...since this is a set of fairly cheap speakers that will only be used in my garage...Can I replace both the mid and tweeter with a single 4" 2-way car speaker? Maybe put a high-pass on it at 2khz or so?

Or even just add a cheap tweeter? I was thinking a 1" soft-dome car tweeter, only because they're easily obtained locally and cheap.

I'm looking to get this fixed for as little money as possible.

Thanks,
Bryan

 

[Cal Weldon]

Hi Bryan
Take some pics of the drivers. There's a few hoarders on this site that might have something that would work.

 

[Bryank930]

I've attached a few pictures. I don't have any of the drivers right now because I'm at work.

From what I remember, the small tweeter is a piezo and has no markings on it. The middle one fits in the hole pictured and only says "east asia - 4-ohm - 50W" on it. It mounts to the plastic piece surrounding the two upper drivers with 2 tabs. The plastic itself is then screwed onto the cabinet.

 

[Bryank930]

Pics of the "mid" driver. I'm not worried about the little 1" piezio thing, it fell apart pretty easily.

I dented the dust cap taking this out...oops.

 

[Cal Weldon]

I am away from my collection but I will look soon. Tell us the CtoC on the mounting holes. Those upper units don't look like Piezos to me.

 

[Cal Weldon]

I have looked in storage and I don't anything exact but might still be able to help if you get those dimensions.

 

[Bryank930]

The CtoC on the mounting holes is 2.5 inches. The uppers are definitely piezos, the back is just a silver disc with a red and black wire on it. I don't really care about that part though.

 

[Cal Weldon]

I'm sure I have something if you don't mind a little cutting and losing the beauty plate.

 

[Bryank930]

I'm sure I have something if you don't mind a little cutting and losing the beauty plate.

Sounds alright to me. Thank you!

 

[Cal Weldon]

I'm going to send myself a message so I don't forget.

 

[sreten]

Hi,

shoe in a pair of these :

3" Paper Cone Sealed Back Midrange 8 Ohm | 289-001

I'll guess you'll need to lose the series resistor and use a series
capacitor, half the value (or a bit lower) than currently fitted.

rgds, sreten.

 

[Cal Weldon]

No need to buy anything. A donation to diyAudio is all I ask.

sreten can you tell me what the XO is now and hopefully I can find him something that'll work.

 

[Cal Weldon]

About all I have is these Technics EAS-65PH60SB tweeters. They are a little bigger at 3.5" CtoC on the mounting holes though.

 

[Bryank930]

With those being 8ohms, that'll mess with the impedance my receiver sees, right? The back of it says no less than 8ohms.

XO that's in there now is a 3.3uF capacitor and an inductor of unknown value (no labels anywhere). @ 4ohms, that's about 12khz, correct? Seems a bit high...

 

[Cal Weldon]

You don't really have to worry about your amp with tweeter impedances. If the actual impedance is 8 ohms at the XO point, a 3.3 µfd cap and a 0.5 mH coil will give you about a 4Khz second order.

 

[Bryank930]

Excellent. I think those will work then.

So...how do we work this? Payment? Shipping?

 

[Cal Weldon]

I will send you a PM.