I read a post the other day about bridging the 100.4 and how it blew the power supply after a few months. Well, what about bridging the 100.2 at a 3 ohm load (like a JL W7). Would it be reliable long term to do this or not?

I read a post the other day about bridging the 100.4 and how it blew the power supply after a few months. Well, what about bridging the 100.2 at a 3 ohm load (like a JL W7). Would it be reliable long term to do this or not?

This was with a 1.9 ohm DCR - the JL is about 2.5 ohms, which is quite a bit higher.

The 100.2 is also a more robust design - whereas the 100.4 splits up 12 power supply FETs for four channels the 100.2 has the same amount for two channels. This is one reason the 100.2 is more under-rated than the 100.4 is.

So, you'll be fine - just set your gains accurately with a DMM and don't continually clip the amp.

I know the 100.2 is beefier and since the 100.4 lasted that long and with the higher load I figured it would probably be a decent bet it'd hold up. My friend's been looking for a new amp for his W7 so now I have something to recommend to him. Thanks a lot Jacob.

It would be plenty of power IMO.

so how much power can that 100.2 really put out? and at what ohms?

so how much power can that 100.2 really put out? and at what ohms?

500 watts @ 4 ohms bridged is about average.

His "3 ohm" load is very nearly an actual 4 ohm load, I think JL calls it 3 ohms more for marketing than anything. The D2 Nightshade is 2.92 ohms in series (4 ohms nominal) and his woofer is only 14% less than that.

ahhh gotcha, and just out of curiosity Jacob, what about unbridged at 4 ohms? like 150x2?

I think it's around 120-125wrms per channel @ 4ohm

At a low THD 125 x 2 is about right at average car voltage - at 14.4v / 1-2% it can be as high as 140 per channel.

ahhh, still plenty of power for a pair of tweets actively, thanks! oh and with all your replies to e-mails and forum posts so prompt, when do you find time to design Jacob? (not like I'm complaing you have no life but serving your customers lol)

ahhh, still plenty of power for a pair of tweets actively, thanks! oh and with all your replies to e-mails and forum posts so prompt, when do you find time to design Jacob? (not like I'm complaing you have no life but serving your customers lol)

I find time here and there

My girlfriend does get mad at me for being on the computer so much (like right now) *laughs*

ahhh, still plenty of power for a pair of tweets actively, thanks! oh and with all your replies to e-mails and forum posts so prompt, when do you find time to design Jacob? (not like I'm complaing you have no life but serving your customers lol)

I find time here and there

My girlfriend does get mad at me for being on the computer so much (like right now) *laughs*

You better make her happy, or she'll cut you.

ahhh, still plenty of power for a pair of tweets actively

lol

sorry to bump such an old thread, but i couldn't find the answer when i searched

would it ok if i bridged the 100.2 to 2ohms? and how much power do you think it would be pushing?

Edited July 8, 200817 yr by brazilianguy

It is recommended that you bridge the 100.2 to no lower then 4 ohms. I think a 2 ohm load bridged would be too low, and likely to break something. What exactly are you trying to power, and what is the coil configuration?

Edited July 8, 200817 yr by SteveSan

I'm thinking of powering an IDQ12 D4 with the 100.2

It is not a good idea to bridge the 100.2 lower than 4 ohms, it was not designed for that.

ok thanks

sax100.2 says 200 x 2 watts @ 2 ohms

if i'll connect a 2ohm woofer at one channel, output will be 200watts in that particular channel right?

sax100.2 says 200 x 2 watts @ 2 ohms

if i'll connect a 2ohm woofer at one channel, output will be 200watts in that particular channel right?

Yes.