Wicks Posted February 21, 2014 Report Share Posted February 21, 2014 Found another lil gem on eBay the other day. A Gen1 old school Rockford Fosgate Punch75. I loaded it with my resistor bank which meters at about 4.1ohms. Upon measuring the load at the mainboard of the amp, I measured 5ohms. Looks like the old school "molex" plugs add a bit of resistance themselves. So during the power tests, the amp was really seeing about a 5ohm load. I couldn't adjust my resistor bank any lower so this is what I had to go with. Specs: 37.5W rms @ 4ohms with 0.05% THD. I tuned the gains right to the point of clipping with my DD-1 so it should be right below 1% THD. The first channel A little over 60W Second channel A little less at 52W I'm sure measuring at 1% THD will increase the power output but this lil guy is definitely underrated! This post sent with 100% recycled electrons. 2004 BMW M3Mechman 280A 2 - XS Power XP30001 - XS Power D375 500F of Maxwell SuperCaps (soon to be 1000F) iPadMini2Dash mounted O-scopeAudison bitOne (Remote DRC MP) Highs Amp - PPI Art A404 Hertz HSK130 (HSK165 waiting...) DC Audio DC9.0K 2- DC Audio XL12m2LEGAL - 147.3dB @ 41Hz OUTLAW - 150.2dB @ 45Hz OUTLAW - 145.7dB @ 30Hz JUNE 2014 SOTM WINNER 2014 COLORADO PEOPLE'S CHOICE WINNER SOTM BUILD:http://www.stevemeadedesigns.com/board/topic/141656-wicks-e46-m3-build-bass-turbo-button-and-a-big-new-addition/page-68#entry2802026 Link to comment Share on other sites More sharing options...
RooTxBeeR Posted February 21, 2014 Report Share Posted February 21, 2014 Such cool stuff man. Makes me want to try all this, I would need a Oscope and a resistor bank. Oscope would be the most expensive, need to compare it to a AD-1 lol On 11/20/2012 at 8:54 PM, AMI CUSTOMS said: Turned mine up today at a light, guy next to me his steering wheel started moving and he looked over at me like I was a magician lol. On 5/9/2012 at 8:45 PM, skittlesRgood said: fuck the plating. look at what the main metal used is. you could buy unicorn blood plated terminals but if its just covering up dog shit, whats the point On 4/10/2013 at 12:26 PM, mrd6 said: I'll admit, half way through sanding that fiberglass in the rain and cold while I was all itchy I was definitely starting to question why i was doing this haha Soon To Be '04 Ford Escape US Alternator 280A Hairpin D4800 Under the Hood (6) XP3000's in Rear 1/0 SHCA & XS Power 4 runs to back TORK2 kit from Tony @ CE Auto Supply Pioneer DEH-80PRS DD AW6.5 (2) per door *Tweeter Unkown* DD SS4a & C3d (2) SCV4000 @ .5Ohm (2) 15" Sundown Zv5 Link to comment Share on other sites More sharing options...
Wicks Posted February 21, 2014 Author Report Share Posted February 21, 2014 Such cool stuff man. Makes me want to try all this, I would need a Oscope and a resistor bank. Oscope would be the most expensive, need to compare it to a AD-1 lol Yep, I LOVE being able to buy and play around with these amps that got me hooked into this hobby. If you already have an oscope then stuff like this is easy, but you don't necessarily need one. You also don't need an AD-1 for old school amps since most are 500W or less which can be inexpensively done with a bank of power resistors. An AMM-1 would replace the oscope and DD-1 for something like this. It was designed for a real-world reactive setup, but will work just fine on a resistive load as well. This post sent with 100% recycled electrons. 2004 BMW M3Mechman 280A 2 - XS Power XP30001 - XS Power D375 500F of Maxwell SuperCaps (soon to be 1000F) iPadMini2Dash mounted O-scopeAudison bitOne (Remote DRC MP) Highs Amp - PPI Art A404 Hertz HSK130 (HSK165 waiting...) DC Audio DC9.0K 2- DC Audio XL12m2LEGAL - 147.3dB @ 41Hz OUTLAW - 150.2dB @ 45Hz OUTLAW - 145.7dB @ 30Hz JUNE 2014 SOTM WINNER 2014 COLORADO PEOPLE'S CHOICE WINNER SOTM BUILD:http://www.stevemeadedesigns.com/board/topic/141656-wicks-e46-m3-build-bass-turbo-button-and-a-big-new-addition/page-68#entry2802026 Link to comment Share on other sites More sharing options...
2loud4uboyz Posted February 21, 2014 Report Share Posted February 21, 2014 I have two 150 like that and paid way to much but I just had to have them. That 75 look is pure damn mint. Great fine sir. Love the oldschool Rockford. I kick myself in the ass everyday saleing my old power 1000. Paid never every penny of 3000 dollars. Wish I could hit a button that I could redo things in time yes lol. When I learn to post picture I will. I have a picture with me and my old baby. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.