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<blockquote data-quote="Hot Rod" data-source="post: 1194063" data-attributes="member: 563824">I have completed the installation of my new audio system and I have a few questions.The installationHead unit: Full Bandwidth Power (at less than 1% THD): 22W x 4.Head unit powers the front and rear speakers.Amp: 4Ch amp set to 2Ch mode. 400W x 2Ch.RCA inputs are connected to the head units Sub Woofer output.Amp powers the two 10” Subs. Each sub is bridged connected to a channel.Sub box is in trunk.1.&nbsp; &nbsp; Head unit has a built in amp. The instructions say turning off the built in ampenhances the preout quality. Should I leave it on or turn it off?2.&nbsp; &nbsp; Should I aim the subs toward the passenger compartment or the rear of the car?3.&nbsp; &nbsp; What would be the best place to start with the adjustments to complement my installation?4.&nbsp; &nbsp; What do these adjustments do?Head unit adjustmentsFront high pass filter - Through/80/100/120/150/180 HzRear high pass filter - Through/80/100/120/150/180 HzLow pass filter - 60/80/120/ Through HzSubwoofer Phase – Reverse (180 deg) / (0 deg)Amp adjustmentsFront end defeat – Bypasses signal processing circuitryCrossoverFilter switch – puts amp into All Pass mode preventing any crossover adjustmentsFrequency Switch – switches between High pass/Low pass modeMultiplier Switch – Sets multiplier for crossover frequencies x1/x10 x10 sets theadjustment to 50 – 5000HzFrequency AdjustmentGainAny comments or suggestions would be appreciated.Thanks</blockquote>

[QUOTE="Hot Rod, post: 1194063, member: 563824"] I have completed the installation of my new audio system and I have a few questions. The installation Head unit: Full Bandwidth Power (at less than 1% THD): 22W x 4. Head unit powers the front and rear speakers. Amp: 4Ch amp set to 2Ch mode. 400W x 2Ch. RCA inputs are connected to the head units Sub Woofer output. Amp powers the two 10” Subs. Each sub is bridged connected to a channel. Sub box is in trunk. 1. Head unit has a built in amp. The instructions say turning off the built in amp enhances the preout quality. Should I leave it on or turn it off? 2. Should I aim the subs toward the passenger compartment or the rear of the car? 3. What would be the best place to start with the adjustments to complement my installation? 4. What do these adjustments do? Head unit adjustments Front high pass filter - Through/80/100/120/150/180 Hz Rear high pass filter - Through/80/100/120/150/180 Hz Low pass filter - 60/80/120/ Through Hz Subwoofer Phase – Reverse (180 deg) / (0 deg) Amp adjustments Front end defeat – Bypasses signal processing circuitry Crossover Filter switch – puts amp into All Pass mode preventing any crossover adjustments Frequency Switch – switches between High pass/Low pass mode Multiplier Switch – Sets multiplier for crossover frequencies x1/x10 x10 sets the adjustment to 50 – 5000Hz Frequency Adjustment Gain Any comments or suggestions would be appreciated. Thanks [/QUOTE]

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