Bi-amping Class D Amplifiers

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=74191
Printed Date: May 14, 2024 at 9:19 AM

Topic: Bi-amping Class D Amplifiers

Posted By: Velocity Motors
Subject: Bi-amping Class D Amplifiers
Date Posted: March 09, 2006 at 10:47 AM

Does anyone have experience with the Infinity Reference 611A amplifier's ? I have a customer that wants to add another Infinity Reference 611A to his existing Infinity Reference 611A to power a single Kappa Perfect 12 DVC. I only deal with MTX and I know some of their higher end mono amplifiers are biampable, but not sure about the Infinity's.

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Replies:

Posted By: DYohn
Date Posted: March 09, 2006 at 10:59 AM

I don't believe the Reference amps are strappable.

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Posted By: MayHem23
Date Posted: March 09, 2006 at 11:35 AM

Yeah, you can't strap those amps together. I'm not sure that woofer needs any more power, but you could run one amp on each voice coil and gain around 250 watts or so. Isn't that woofer only rated at 175 watts per voice coil, you already have 650 watts, do you need 900? Just a thought. Tell him he won't gain any audible output (+1 - 1.5 dB at best), so unless he's competing, not to bother. Better yet, get another woofer and run two. If you do end up running an amp on each voice coil, MAKE SURE YOU BALENCE THE GAINS, WITH A METER. Very important.

Later,

mayhem

Posted By: Velocity Motors
Date Posted: March 09, 2006 at 12:26 PM

That's too bad. The Infinity Kappa Perfect is rated at 400 RMS and 1200 peak.

The amp Reference 611A is not enough for him and he has the opportunity to get another one for a good deal.

Just wanted to weigh our my options here for him. That or else I can get him into a TA81001 MTX and run those subs at 1 ohm load and pound the crap out of them posted_image

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: DYohn
Date Posted: March 09, 2006 at 1:12 PM

Velocity Motors wrote:

Just wanted to weigh our my options here for him. That or else I can get him into a TA81001 MTX and run those subs at 1 ohm load and pound the crap out of them

There ya go! A sales oportunity!

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Posted By: haemphyst
Date Posted: March 09, 2006 at 2:38 PM

MayHem23 wrote:

If you do end up running an amp on each voice coil, MAKE SURE YOU BALENCE THE GAINS, WITH A METER. Very important.

Why do you say that? Are you also of the misunderstanding that "the woofer could be damaged" if this condition is not met? It is absolutely unimportant to "balance the gains", unless you are looking to eke EVERY tenth of a dB from your system. No harm will come to any portion of the system, even if you ran one amp all the way down, and the other all the way up. Hell, run one of the coils 180 degrees out, and it still wont hurt anything...

Please elaborate on your reasoning for that statement...

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Posted By: arrow12
Date Posted: March 09, 2006 at 9:41 PM

Just one question... How is that not enough for him? He needs a new setup then.

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That's my opinion. Take it, leave it, or correct me.