Another gain setting question? voltage
Thread Starter
|
Road Captain
Joined: May 2015
Posts: 668
Likes: 72
From: Wisconsin
Another gain setting question? voltage
I am going to help my buddy with his amp and speakers. He wants me to use my meter to set his gains. His amp is a RZ4-2000D . The specs for that are 4 ohms speakers max 160 watts. The speakers he has are Polk MM652's and MPX 165.3's. They both have a max 200 and constant 100 watts specs. With those figures I believe I should set the voltages at 28.28 based on 200 watts at 3/4 volume? Is that correct? Basically the gains would be maxed. And I have been told and read the specs on the amp almost always fall short. Thoughts? Thanks.
Grand HDF Member
Joined: Sep 2017
Posts: 3,855
Likes: 1,003
From: Southern Virginia
Basically the gains would be maxed
A lot of folks will tell you to use your ears to set them and allow headroom. Me personally I set them to where I could turn the volume all the way up without the amp distorting heavily. I figured if I set it for 3/4 what happens if the volume **** sticks (it does happen) and it runs the volume up all the way? Stuff will probably break. Also that is making an assumption that the head unit will distort after 3/4 volume. Not all of them do. My HK with low level outputs does not start clipping (which is distortion basically) until the last notch. Some other head units may distort sooner. There are some that are engineered to run out of volume adjustment before they clip for safety. If you are using speaker level outputs then it will clip sooner than low level most likely.
So after all that BS maybe try it by ear with a margin of safety. It's better to leave a little volume on the table than smoke in your eyes.
If you can list the make and model of head unit there is a very good chance someone here had used that exact amp/head unit combo and can tell you a good starting point from their experience.
Thread Starter
|
Road Captain
Joined: May 2015
Posts: 668
Likes: 72
From: Wisconsin
Hoyt 1911A1. Thanks. His equipment..
Front speakers--------Polk MM652's
Rear speakers---------Hertz speakers MPX 165.3
2012 Ultra Limited
Thanks again
HU-Bluetooth Harley-Davidson Stereo AQ-MP-5BT-H
AMP---------------------- RZ4-2000DFront speakers--------Polk MM652's
Rear speakers---------Hertz speakers MPX 165.3
2012 Ultra Limited
Thanks again
Thread Starter
|
Road Captain
Joined: May 2015
Posts: 668
Likes: 72
From: Wisconsin
Thanks
Thread Starter
|
Road Captain
Joined: May 2015
Posts: 668
Likes: 72
From: Wisconsin
Specs
SpecificationsRazor Class DRZ4-2000DMax Power2,000RMS Power 4Ω Bridged, 14.4V2 x 500RMS Power 2Ω, 14.4V4 X 250RMS Power 4Ω, 14.4V4 x 160
Trending Topics
Road Warrior
Joined: Jul 2011
Posts: 1,323
Likes: 13
From: Wisco!
I don't believe that it is. But those are the specs for the amp. My belief is they are inflated for sales purposes. IMO.. When I researched bench test for that amp. Seems to be closer to 140W at 4 ohm
SpecificationsRazor Class DRZ4-2000DMax Power2,000RMS Power 4Ω Bridged, 14.4V2 x 500RMS Power 2Ω, 14.4V4 X 250RMS Power 4Ω, 14.4V4 x 160
Then if that's the case I would set the Voltage even a little lower then not to risk blowing the speakers!
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
Likes: 1,246
From: Lake, Ms
That amp does not do the specified exaggerated watts. Will be much closer to 100 watts at 4ohms.
As shown in the amp bench test by AAWAV.
As shown in the amp bench test by AAWAV.
Last edited by SBates08; Sep 26, 2018 at 09:45 PM.
Road Warrior
Joined: Jul 2011
Posts: 1,323
Likes: 13
From: Wisco!
That amp does not do the specified exaggerated watts. Will be much closer to 100 watts at 4ohms.
As shown in the amp bench test by AAWAV.
Attachment 595706
As shown in the amp bench test by AAWAV.
Attachment 595706
So maybe more like 18-20 volts on the meter is more like it?
