Question about Phase Linear UPA424CS Car Audio Amplifier

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Phase Linear UPA424 amp Can it be Bridged?

I bought this for Subs and thought I read bridgable on the outside but no mention of bridgable on outside or in. 12 kenwood 10" older subs. All4 channels of amp available.
Can I bridge 1&2 for 1 sub and 3&4 for the other? Will it damage the amp.
Each channel has either the "+" or "-"in a circle. Are these indicaators of bridging campatable?

Thanks from a rookie!

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4 Suggested Answers

Draco
  • 2 Answers

SOURCE: Phase Linear UPA424...No sound

I had the same problem with mine but i had the 224 version first worked nice just for a small system but i just got this one today and i hooked it up to a small sub box how i had the one before and it just dosent work the other one quit beforhand and i thought it just went bad so i figgerd id buy this one but after about and hr n 1/2 of work to show nothing kinda was a depressing moment, ive gone through my wireing about 4-5 times now and drawn it out 2 times on eveything ive done im just lost, ive even tryed diffrent rca and also tryed a diffrent radio and still nothjing tryed messing aorund with settings still nothing its kinda a bummer

Posted on Jan 15, 2007

Mitco39
  • 62 Answers

SOURCE: Alpine mrp-350 amp

1) If you bridge on a non bridged amp your sound will be horrible as they sine waves comming out of the two teminals will be different... I suggest removing the bridge. 2) The gain knob is to adjust when the amp will reach its max volume with respect to the sterio;s volume. 3) the LP filter is a Low Pass filter and its purpose is to eliminate the higher frequencies that do not sound all the well when played over subwoofers.

Posted on Mar 26, 2007

  • 631 Answers

SOURCE: is it not bridgable

This amp isn't bridgeable. It's a mono amp (only one channel). You need two independent channels to bridge. Some mono amps are bridgeable if you have two identical amps but I don't think Kenwood recommends that with this amp.

Posted on Jan 28, 2008

  • 47 Answers

SOURCE: phase linear model UPA424 wire diagram

YOU WILL NEED A SOLID WIRE FROM UR DECK TO UR AMP 4 A REMOTE WIRE AND A GOOD SET OF RCA JACKS

Posted on Feb 28, 2010

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YOU WILL NEED A SOLID WIRE FROM UR DECK TO UR AMP 4 A REMOTE WIRE AND A GOOD SET OF RCA JACKS

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1) If you bridge on a non bridged amp your sound will be horrible as they sine waves comming out of the two teminals will be different... I suggest removing the bridge. 2) The gain knob is to adjust when the amp will reach its max volume with respect to the sterio;s volume. 3) the LP filter is a Low Pass filter and its purpose is to eliminate the higher frequencies that do not sound all the well when played over subwoofers.

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Phase Linear UPA424...No sound


I had the same problem with mine but i had the 224 version first worked nice just for a small system but i just got this one today and i hooked it up to a small sub box how i had the one before and it just dosent work the other one quit beforhand and i thought it just went bad so i figgerd id buy this one but after about and hr n 1/2 of work to show nothing kinda was a depressing moment, ive gone through my wireing about 4-5 times now and drawn it out 2 times on eveything ive done im just lost, ive even tryed diffrent rca and also tryed a diffrent radio and still nothjing tryed messing aorund with settings still nothing its kinda a bummer

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