Stealth Sub Amp Install

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May 3, 2010 | 07:01 AM

response_surface

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From: SF Bay Area

My Ride: 2005 545i Sport 6 speed Manual

if anyone wants a great amp for a totally stealth install, the arc mini 125.2 makes for a very good candidate. i just made an intermediate bracket that adapts the mini to the oem amp mounts. it clears the hinge/spring mechanism and the trim panel if you install it just right. i made copper pins to jack into the stock harness so no wires have been cut.

it is powering sws8 underseat subs. i have mbquart qm100's with qtc19 tweeters on all 4 corners powered by the HU. the system sounds very good. its not the best sounding system i've ever done, but is MUCH better than the stock setup. its not very loud so i'm also planning a 4ch arc mini for the mids/highs. i just haven't decided yet how to get the inputs for the amp. i may cheap out and use the speaker level inputs, or may go the mobridge/bit one route.

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May 3, 2010 | 07:12 AM

AKAlius

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My Ride: Original E60 Spec: 530i - Silver Grey Out, Black Dakota Leather In, Navigation Pro, Voice Command, HiFi Audio, Sports Package, Premium Package, Cold Weather Package w/ Heated Seats, Style# 123 Alloy Track Wheels, Auto AC, Power Front Seats, Active Turn Xennon Headlights, Mods: OEM M-Tech Front Bumper, OEM M Side Skirts, OEM M5 Rear Bumper, M5 Trunk Lid Finisher, M5 Style Mirrors, Custom Hamann Style Splitter, Custom Hartge Style Diffuser, RD Sport Boot Spoiler, LCI Taillights, Bruce Miranda's V4 LCI Retro Cables, 6000K Xenon light Bulbs, Xenon White LED License Plate Lights, 8000K HID 9006 Fog Lights, Akaliusï¿½ Front Headlight Euro Overlays, Matte Black Kidney Grilles, E60.Net Clings, Debadged, Llumar Tinting "Micro Edged, 15% Rear 35% Sides, Engine Mods: Custom Magnaflow Quad Exhaust w/ Eisenmann Stamped 3ï¿½ Tips, RPI Scoop (Red) Added Electronics: V1 Equipped (Hardwired), OEM Alpine CD Changer Retrofit, Shoes: SOLD-20" Staggered Vertini Hennesey Rims, Falcon 452's Tires-SOLD New Shoes: 19" VMR 710 Hyper Silver, General Exclaim UHP 245/35/19 Front-275/30/19 Rear, Gloss Silver Caliper Paint Job DIY ^_____________ Retired ______________ Took Delivery 10/26/2009: LOADED! E60 M5 Silverstone II/Black, Active Seats, Comfort Ventilated/Heated Seats, HUD, Brushed Aluminum Trim,

Great find! Perhaps a line out converter for your amp sound signal?

May 3, 2010 | 07:20 AM

response_surface

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From: SF Bay Area

My Ride: 2005 545i Sport 6 speed Manual

thanks to bruce_miranda i found out that the signals from the HU to the subamp are already line level so no need for a converter. i hooked up a scope to them just to be sure, since i doubted that they were in fact line level. looks like the peak voltage is about 3v. if i use the 4ch arc mini for the 4 corners i'll just its speaker level inputs if i go the cheap route.