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Car Audio Help
Enclosure Design & Construction
Enclosure for 8's & 6.5's
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<blockquote data-quote="ShayneF" data-source="post: 8176414" data-attributes="member: 641825"><p>I have done a lot of reading on this forum, and like most average music listeners, sometimes this raises more questions than it answers. So I have a lot to get sorted.</p><p></p><p>My first issue is that I want to build an enclosure to fit two 8inch subs and also two 6.5's as well. I do not want the 6.5's in the rear doors unless absolutely necessary, that will be a last resort. We have a lot of info on here about sub boxes, and I have the specs supplied by Alpine for box size, so that should be a good starting point. But I have not found any info about putting other speakers in the boxes as well.</p><p></p><p>Home audio speakers do this of course, but a car is a different environment, so the parameters change. So I guess the first question is what is the best option?</p><p></p><p>A. Enclosure containing 8's and 6.5's</p><p></p><p>B. Enclosure for the subs, and two separate boxes for each 6.5.</p><p></p><p>If keeping them separate is the best (or easiest) option, then what info is available for design of a box for a 6.5 mid?</p><p></p><p>Not sure if this will be relevant at this stage, but I will provide some vehicle and system info below:</p><p></p><p>I am after sound quality not big power and volume. My old Alpine 6081 subs are only 100w RMS each, and in a previous vehicle they did all I needed. I like a nice balanced sound, and most passengers in my car never knew I had subs until I told them. My last box was sealed and worked well I think. My understanding is that ported boxes need to be very well designed - no margin for error. If I have enough space then I may try ported, but that is not known at this point (see below for vehicle info). If space is not enough then I may have to go sealed again, which I understand allows more freedom of box size to get a reasonable result.</p><p></p><p>The 6.5's are a Focal split set (75W RMS), rated at . I have a second set of Focal 5-3/8 splits (60W RMS) in the front - mids in the doors and tweeters on the a pillar.</p><p></p><p>HU : Alpine CDA117E</p><p></p><p>Sub amp : Alpine MRD501</p><p></p><p>4 Channel amp: Boston GT4100</p><p></p><p>The vehicle is not sold in the US (Nissan Patrol), but it will be similar to a Toyota Tundra dual cab when completed. It is being modified from a wagon, so a new rear firewall will be constructed. So at this point exact measurements are not known. Enclosure will go on this firewall behind the back seat, and will house the speakers and have the amps and crossovers mounted there as well.</p><p></p><p>So what are your thoughts on a single or separate enclosures, and what are the requirements for a 6.5" mid range speaker box?</p><p></p><p>Cheers,</p><p></p><p>Shayne</p></blockquote><p></p>
[QUOTE="ShayneF, post: 8176414, member: 641825"] I have done a lot of reading on this forum, and like most average music listeners, sometimes this raises more questions than it answers. So I have a lot to get sorted. My first issue is that I want to build an enclosure to fit two 8inch subs and also two 6.5's as well. I do not want the 6.5's in the rear doors unless absolutely necessary, that will be a last resort. We have a lot of info on here about sub boxes, and I have the specs supplied by Alpine for box size, so that should be a good starting point. But I have not found any info about putting other speakers in the boxes as well. Home audio speakers do this of course, but a car is a different environment, so the parameters change. So I guess the first question is what is the best option? A. Enclosure containing 8's and 6.5's B. Enclosure for the subs, and two separate boxes for each 6.5. If keeping them separate is the best (or easiest) option, then what info is available for design of a box for a 6.5 mid? Not sure if this will be relevant at this stage, but I will provide some vehicle and system info below: I am after sound quality not big power and volume. My old Alpine 6081 subs are only 100w RMS each, and in a previous vehicle they did all I needed. I like a nice balanced sound, and most passengers in my car never knew I had subs until I told them. My last box was sealed and worked well I think. My understanding is that ported boxes need to be very well designed - no margin for error. If I have enough space then I may try ported, but that is not known at this point (see below for vehicle info). If space is not enough then I may have to go sealed again, which I understand allows more freedom of box size to get a reasonable result. The 6.5's are a Focal split set (75W RMS), rated at . I have a second set of Focal 5-3/8 splits (60W RMS) in the front - mids in the doors and tweeters on the a pillar. HU : Alpine CDA117E Sub amp : Alpine MRD501 4 Channel amp: Boston GT4100 The vehicle is not sold in the US (Nissan Patrol), but it will be similar to a Toyota Tundra dual cab when completed. It is being modified from a wagon, so a new rear firewall will be constructed. So at this point exact measurements are not known. Enclosure will go on this firewall behind the back seat, and will house the speakers and have the amps and crossovers mounted there as well. So what are your thoughts on a single or separate enclosures, and what are the requirements for a 6.5" mid range speaker box? Cheers, Shayne [/QUOTE]
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