TonyD'Amore

I don't know CJ, we are talking 0.46dB. If the voice coil temperature changed between runs you might see this. Can you get those results consistantly?

The RCA output voltage will not drop with B+ voltage dropping. The RCA outputs are fed from a mini-amplifier inside the headunit that has feedback. Think of it as regulated

I noticed this personaly on my own ride. I have Chrysler 300 with the stock HU that has a Rockford BLD (3Sixty Line Driver) for the added sub stage . My sub stage is a fully upgraded single 10" DC XL m2 running off a DC 2.0k. The line driver has 2 modes Balanced and Unbalanaced. In Balanced mode it produces 22 Vrms and 11 Vrms in Unbalanced mode. When setting my gains (line driver hace a gain as well) with the DD-1 , I noticed that in balanced mode I get full time distortion on 0db 40hz track. But in balanced mode I can addjust the gains slightly (if at all). Also when I set the amp if I use the -5bdb track on Unbalanced mode I'll get full time distortion decteted on my DD-1. The reason the BLD is 11 Vrms unbalanced and 22 Vrms balanced is because in unbalanced mode it puts up to 11 Vrms on the center pin of the RCA and grounds the shield. In "balanced" mode it puts 11 Vrms on the center pin of the RCA AND 11 Vrms on the shield!! If your amplifier doesn't have balanced or differential inputs, you are shorting the BLD out in balanced mode. Take a digial meter, set it to ohms, with the amplifier not turned on and the RCAs disconnected measure the resistance from battery ground connection to RCA shield. Let me know

RCA voltage will have no affect on efficency. Every amplifier reguardless of class has some internal gain. Lets say than an amplifier puts out 50 Vac RMS before clipping. Lets also say that the internal gain on this amplifier is 10. That means that it will take 5Vac of input to drive the amplifier to clippling. ( 5Vac X gain of 10 = 50Vac ) The "gain" control on the amplifier is to "gain up" whatever signal is coming in, up to the 5Vac that is required to drive the amplifier to clipping. Example A: There is only 1Vac input to the amp. We adjust the external gain control to have a gain of 5 to drive the amp to clipping. So the 1Vac coming in goes through the "preamp section" of the amplifier where the gain control gains it up to 5Vac. The signal then goes to the "amplifier" section of the amplifier where it internal gain is 10 so now our amplifier puts out 50Vac. The gain pot on this amp is probably 1/2 way up or so Example B: There is 5Vac input to the amp. We adjust the external gain control to have a gain of 1 to drive the amp to clipping. So the 5Vac coming in goes through the "preamp section" of the amplifier where the gain control does nothing so the signal is still 5Vac. The signal then goes to the "amplifier" section of the amplifier where it internal gain is 10 so now our amplifier puts out 50Vac. The gain pot on this amp is all the way down. Same result, no affect on efficency or power output. The only possible difference between example A and example B would be that B could potentially have a slightly "cleaner" signal since the signal would have less chance of picking up alternator whine or other noises as the signal travels from source unit to amplifier.

We are talking about input voltage on the RCAs correct? Battery voltage is not part of this question?

So sick Brent damn

Another random use for the IM-SG. http://www.youtube.com/watch?v=844mCPYfKLE&feature=plcp

I'm working hard on that right now. I will try to have it ready by Monday.

Thanks man! We are finding new uses for it every day

Just a quick video to demonstrate one more use of the IM-SG. Everyday it seems we find something around here that the IM-SG is useful for. Also, a new product from D'Amore Engineering in video! http://www.youtube.com/watch?v=844mCPYfKLE

Playing around with (4) AF-15s in Juan's altima. Boxes are 1.18 cubic feet sealed each, that's it! The drivers are getting 250w-275w each only!

Sweet! Thank you for the tip! Doing it now

Thank you for the great review! We use ours several times a week here too it seems.

More updates to our website complete. 8 inch subwoofer AF-8 specs added. Weather page now broadcasting in full 720p HD. Click the live view for 720p view! http://damoreengineering.com/

One more

The 12 and 15 would work great

Spy Pic

Box recommendations for each subwoofer can be seen on the page for that woofer. Click on the small picture of the subwoofer to get to it's dedicated page. Here is a direct link to the 12" page http://damoreengineering.com/af-12.html

The aluminum cone and dust cap absorb heat from the voice coil and dissipate it into the air

The pre-order discount is free shipping

At the moment it is single 4 only, dual 4s are in the works

We are proud to announce our entry into the subwoofer market. We are on pre-order right now, they will be shipping by Oct 15th. The AF (Alta Fedeltà) series of woofers have been optimized for very small sealed or medium sized ported enclosures. They were designed for the highest sound quality in the smallest space. All of the drivers in this series feature: • Aluminum cones, aluminum dust caps, and aluminum voice coil formers for maximum heat transfer from the voice coil to the cone. This helps keep the voice coil cool during high output. • Rubber surround for long life • Tinsel leads woven through spider to minimize unwanted mechanical noise and increase durability • Single 4 ohm voice coil to minimize moving mass and lower distortion • Triple shorting rings to minimize distortion • Nickel plated binding posts • Each driver individually tested before it ships • Detailed Speaker Performance Report with T/S parameters FOR THAT SPECIFIC DRIVER ships with each unit. (An industry first) Sample Performance Report All the info you could want here: http://damoreenginee...subwoofers.html SPY PIC!

If you would like a new original CD mailed to you send an email to [email protected] with your info and we will take care of you

This only applies to the speaker sitting in a free air environment.

Check out the signal from a old Rockford IM-1... pretty rough.