Change Harman Kardon midrange speakers Kia Stinger

[andrew tay]

OK I just improved my sound system further. I found some helpful ideas for those who are interested.

1) the factory sound processor set the bass and treble up. So to 'de-equalise' the factory tune, set the bass to -10 and Treble to -5.

2) build in amplifier is class D. So for it to work properly with other it need to have a 'dummy speaker load' before you feed it to another amplifier. You will find significant improvement in distortion.

Audison calls it universal speaker simulator: USS 4 | Audison - car audio processors, amplifiers and speakers

Audiocontrol calls it Load Generating Device: AC LGD's: Do your line converters put a resistor load on the speaker outputs of my factory amp? | AudioControl

Focal hi Lo V3 has a dummy load build-in. I used one for subwoofer channel and it works really well. Noticeable improvement. Focal HILO.V3 - Stereo Amplified Signal Converter. V1 and V2 do not have the feature built in.

I also used cheap 10w27ohm ceramic resistors for the other 9 channels and it works just as well.

3) Digital signal processor (DSP) helps. I used a 4 channel Audison Bitten for the 4 mid-range and tweeter pairs. I tune it with an Andriod app call Audio Tools with a calibrated iMM-6 microphone from Dayton Audio.

This is my current upgraded setup.

This is the sound frequency sweep that I got from this with Bass set to -10 and Treble set to -5'

Hope that helps

 

[0700]

that was sweet tech ass-istance

 

[MerlintheMad]

that was sweet tech ass-istance

Ah, I see you found Andrew already (ignore what I said on the other thread ).

 

[andrew tay]

Just change the mid range speaker because I was not happy with the Audiopipe crossover setup. It uses a resistor to reduce the volume of the tweeter (89 db/w) to match the volumn of the Vifa midrange speaker (83 db/w). Unfortunately, the resister also reduces the high frequency clarity of the tweeter.
So I went to buy a 'high sensitivity' midrange speaker which match the output of the tweeter (88 db/w). With a lot of trial and error I ended up using a simple coil inductor and capacitor for the crossover. I also removed the metal grill plate and use speaker cloth instead. The end result is a significant improvement in mid and high frequency clarity.

https://www.aliexpress.com/item/1005001841676886.html?spm=a2g0o.productlist.main.11.3ea91537g74LA9&algo_pvid=04ade4a3-b9be-409a-97e4-52faeb46aab9&algo_exp_id=04ade4a3-b9be-409a-97e4-52faeb46aab9-5&pdp_ext_f=%7B%22sku_id%22%3A%2212000020428790469%22%7D&pdp_npi=3%40dis%21AUD%2124.94%2121.95%21%21%21%21%21%40211bf3f116767951989444477d06ea%2112000020428790469%21sea%21AU%21230977384&curPageLogUid=zsR0OxHOZdzv

For those who are interested, that is using a 1st order Butterworth crossover @ 4800Hz. For those who even want it simpler, just use the capacitor and don't worry about the inductor. The end result is hardly noticeable.