amp settings

Home / the12volt's Install Bay / Car Audio / amp settings (

Topic Closed)

Welcome Guest :)

Members

< Prev Topic Next Topic >

whitevelvis

Member - Posts: 4

Joined: June 28, 2005

Location: United States

Posted: June 28, 2005 at 4:47 PM / IP Logged

Could anyone offer some initial settings for sound quality for both of these amps. Hopefully I can get a good jumping off point and tweak it a little here and there. Thanks for the replies.

99 Nissan Maxima SE

Alpine CDA-9847

JL Audio VR 6.5" frt/rear

2 MB Quart 10" PCE254 in a QLogic ported box

haemphyst

Platinum - Posts: 5,054

This member has been recognized as an authority in Electrical Theory. Click here for more info.

This member has been recognized as an authority in Mobile Audio and Video. Click here for more info.

Joined: January 19, 2003

Location: Michigan, Bouvet Island

Posted: June 28, 2005 at 6:22 PM / IP Logged

ummm... WHAT amps?

It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

whitevelvis

Member - Posts: 4

Joined: June 28, 2005

Location: United States

Posted: June 28, 2005 at 9:43 PM / IP Logged

my apologies, i thought it showed up in my signature. this is what im running

Alpine CDA-9847

JL Audio VR 6.5" frt/rear

2 PCE254 in a QLogic ported box

99 Nissan Maxima SE

Alpine CDA-9847

JL Audio VR 6.5" frt/rear

2 MB Quart 10" PCE254 in a QLogic ported box

whitevelvis

Member - Posts: 4

Joined: June 28, 2005

Location: United States

Posted: June 28, 2005 at 10:12 PM / IP Logged

I made some adjustments on it tonight and it sounds very good, but now ive got alternator whine coming through. does too much gain cause this? ill make a note of the settings and post tomorrow.

99 Nissan Maxima SE

Alpine CDA-9847

JL Audio VR 6.5" frt/rear

2 MB Quart 10" PCE254 in a QLogic ported box

whitevelvis

Member - Posts: 4

Joined: June 28, 2005

Location: United States

Posted: June 30, 2005 at 7:37 AM / IP Logged

THE 4200

gain-about 2 volts, range-x1, freq-about 180Hz, type-hpf, filter-off, f/e defeat-off

THE 2400

rgain-about 2 volts, range, x10, freq-about 1kHz, type-lpf, filter-on, lgain-about 2 volts, f/e defeat-off

99 Nissan Maxima SE

Alpine CDA-9847

JL Audio VR 6.5" frt/rear

2 MB Quart 10" PCE254 in a QLogic ported box

DYohn

Moderator - Posts: 10,741

This member has made a donation to the12volt.com. Click here for more info.

Joined: April 22, 2003

Location: Arizona, United States

Posted: June 30, 2005 at 8:21 AM / IP Logged

whitevelvis wrote:

I made some adjustments on it tonight and it sounds very good, but now ive got alternator whine coming through. does too much gain cause this? ill make a note of the settings and post tomorrow.

Yes, high gain can cause alternator whine but more likely is poor quality ground. Make sure you have good ground connections to bare metal on the vehicle's chassis. You need to set the gains to match the maximum HU unclipped output, not by eyeball or guessing or using any voltage markings on the amps. There are many ways to do this depending on your skill level and available equipment. Do a forum search for "gain setting." Post back if you can't figure it out.

As far as your amplifier crossover settings, I suggest setting your sub amp as a LPF (low pass filter) at approximately 80Hz. Set the mains amplifier as a HPF (high pass) at the same, 80Hz. If the mains bottom out or can't handle the bass, raise it a bit to around 120Hz, and be sure to match that setting wiht the sub amp. This will not be ideal as bass becomes directional above 80, but you do not want a big hole in your overall system response. Turn any bass boost or amplifier EQ "off."

Support the12volt.com

Poormanq45

Silver - Posts: 597

Joined: October 27, 2004

Location: United States

Posted: June 30, 2005 at 9:41 AM / IP Logged

Like Dyohn said, the most likely culprit for the alternator whine is a faulty ground, but you are correct in saying that improper/mis-aligned gains can cause that.

Having one gain set too hihg/low relative to an internal/external gain setting will cause a noticable humming/hissing noise.

Sorry, you can NOT post a reply.
This topic is closed.

Printable version

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

Search the12volt.com

Follow the12volt.com

Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

amp settings

Sorry, you can NOT post a reply.This topic is closed.

Sorry, you can NOT post a reply.
This topic is closed.