Audio Experts Needed

[GotWRX03]

I have a Kenwood HU MPV5025. It has two(2) preamp outputs (one front, one rear). Can you tell me if I've drawn this diagram correctly? If not, can you correct it please and show me a better design.

thank you so much.

[Th3Franz]

That should work fine.

[MidKnight]

That should work fine.

[Integra96]

Looks bueno to me.

[GotWRX03]

sweet! Thank you.

[GotWRX03]

one more question, since I'll be using the "rear preamp output" will the rear speakers still work?

[Trainrex]

one more question, since I'll be using the "rear preamp output" will the rear speakers still work?

Yes. The rear preamp output just provides the audio signal for the amp.

[ej20fan]

Yes. The rear preamp output just provides the audio signal for the amp.

You can actually turn off the internal amp for the speaker output on that radio, but it'll work fine if you haven't changed that setting.

To make things really confusing, the load on the subs at the terminal connected to the amp cannot be any lower than 4 ohm on most class A/B amps when bridged. Make sure you oberve this, as you'll otherwise end up with amp flambeau.

[GotWRX03]

... To make things really confusing, the load on the subs at the terminal connected to the amp cannot be any lower than 4 ohm on most class A/B amps when bridged. Make sure you oberve this, as you'll otherwise end up with amp flambeau.

isn't it that when you bridge something, you add the ohms?

like if a sub has 4 ohms and you are to bridge 2 of this sub, will it not be 8 ohms?

[ej20fan]

... like if a sub has 4 ohms and you are to bridge 2 of this sub, will it not be 8 ohms?

True, but at 8 Ohms, you're only getting half the power you would at 4 Ohms. Again, if you are using a 2 channel class A/B amp, the most efficient/powerful setup would be in a 4 Ohm mono, if class D, then you'd want a minimum 2 ohm load. It depends on your amp. If you have a class A/B amp, you should get subs that allow for a final impedance of 4 Ohm. What subs are you using, and what amp??

[GotWRX03]

this is the amp that i'll be using. i know it's not much, and this is actually perfect for me. i don't like booming sound - i just want a little "umph" - you know what i mean?

GM-X742

what would you suggest between a set of 8" or 10" subs?

... What subs are you using, and what amp??

[ej20fan]

As I predicted, the amp you chose is a class A/B amp, meaning that it needs to be bridged at a 4 Ohm load in order for it to make some power. I'm a pioneer dealer, haven't played much with their amps though. In case you're curious, they recalled the entire production line last year. They've sure fixed a lot of things, and I'm sure it'll be a great amp.

I personally am a huge audiophile, constantly tweaking my system, searching for audio nirvana, and therefore am a huge fan of any 8" or 10". I've built vehicles that employing two 8" sounded better and louder than some cars with 12". I highly recommend the JL Audio W-0 8". Put them in a sealed enclosure, shared airspace, meaning that the box will be extremely small and light ca. less than 1.5 cubic feet. In my car, I have a single high performance 10" Kove Audio 10" T3 Armageddon woofer, in a vented enclosure. It's louder than most cars with bigger woofers, yet very accurate, with great fidelity. If you plan on going with a 10", buy a higher end woofer (Alpine Type R, Rockford Fosgate P2, MB Quart, or MMATS), then a vented enclosure. This path is more expensive, but will result in some seriously impressive bass, and decent SPL levels. The 8" will be more musical, sound cleaner and better, but will struggle with lower frequencies i.e. anything below 60hz. Another benefit is cost and ease of installation, as the box is literally fool proof, but then again, there are those who somehow always manage to lower our expectations . The question now is only what your checkbook can afford, and how good your local installer is. (BTW, I can ship custom enclosures ). Let me know what happens,

Claudiu Ene
Sales Manager, "Sound Waves" Van Nuys.

[GotWRX03]

ej20fan -

the JL W0 8" have 8 ohms though. if I series the two, it'll be 16 ohms - or are you talking about some other JLs?