System Repairs/ Upgrade?
Thread Starter
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
System Repairs/ Upgrade?
My current front stage is a 3-way Alpine Type X component set. (6.5" midbass, 5.25" midrange mounted in the door and 1" tweeter in the A pillar.) I'm using an Alpine PXA H701 crossover to seperatee the mid/midbass from the tweeters.
The area of concern is the midbass speakers. I noticed the surround beginning to deteriorate and peel off. I glued them back together but I'm still thinking they may not be performing as well as they should.
I reecently came across a set of SPX 17MB speakers on ebay and grabbed them for cheap. I also grabbed a set of SPX 107s. The 107 featues a 4" midrange. The current 5.25" midrange is being partially blocked (about 30%) by the door panel (see picture below)
The 4" midrange should be able to fit in the area without any of the speaker being blocked.
Question: Should i swap over to the 4" midrange to get less blockage or stick with the 5.25"?
The area of concern is the midbass speakers. I noticed the surround beginning to deteriorate and peel off. I glued them back together but I'm still thinking they may not be performing as well as they should.
I reecently came across a set of SPX 17MB speakers on ebay and grabbed them for cheap. I also grabbed a set of SPX 107s. The 107 featues a 4" midrange. The current 5.25" midrange is being partially blocked (about 30%) by the door panel (see picture below)
The 4" midrange should be able to fit in the area without any of the speaker being blocked.
Question: Should i swap over to the 4" midrange to get less blockage or stick with the 5.25"?
Thread Starter
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
Melting Slicks
Joined: Dec 2004
Posts: 2,394
Likes: 0
From: Bay Area CA
I would reconfigure your 6.5" crossover to allow you to plug in the 4" mid on a template and A/B the 4" vs the 5.25" mid under the same frequencies. Simplest way to see which you like better IMO and I am pretty sure you have the power and crossover adjustability to make it happen.
Generally speaking when you are talking about a dedicated midrange, the 4" will outperform the 5.25", provided that you are not asking your midrange to play 150hz, 250hz+ IMO for a dedicated mid.
G'luck man
Fej
Generally speaking when you are talking about a dedicated midrange, the 4" will outperform the 5.25", provided that you are not asking your midrange to play 150hz, 250hz+ IMO for a dedicated mid.
G'luck man
Fej
Thread Starter
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
I would reconfigure your 6.5" crossover to allow you to plug in the 4" mid on a template and A/B the 4" vs the 5.25" mid under the same frequencies. Simplest way to see which you like better IMO and I am pretty sure you have the power and crossover adjustability to make it happen.
Generally speaking when you are talking about a dedicated midrange, the 4" will outperform the 5.25", provided that you are not asking your midrange to play 150hz, 250hz+ IMO for a dedicated mid.
G'luck man
Fej
Generally speaking when you are talking about a dedicated midrange, the 4" will outperform the 5.25", provided that you are not asking your midrange to play 150hz, 250hz+ IMO for a dedicated mid.
G'luck man
Fej
I can set the crossover to "high" and it will cutoff the midrange at 190Hz. I believe it's set at "low" right now causing the 5.25" to have a 100Hz LPF. (probably causing some of my muddy sound)
The owners manual says the 4" has a 90dB sensitivity vs the 86dB sensitivity of the 5.25". Theoritically, this means i can direct more power to the midbass to get more bottom end power. Thee biggest joy is that the 4" mids would require less airspace since i'm enclosing the mids to seperate them from the midbass.
Thread Starter
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
Update:
New personal record: I measured, designed built glassed and sanded 2 matching angled fiberglass speaker mounts in just 7 hours!! (i'm attributing most of this to my new powertools and clear shop!
Initial thoughts: The new speaker mounts have 100% visible with the door panel on. In addition the new speakers produce significantly more accurate midrange. Granted i didn't have time to re-tune the system, but i have a lot of faith in the end result.
New personal record: I measured, designed built glassed and sanded 2 matching angled fiberglass speaker mounts in just 7 hours!! (i'm attributing most of this to my new powertools and clear shop!
Initial thoughts: The new speaker mounts have 100% visible with the door panel on. In addition the new speakers produce significantly more accurate midrange. Granted i didn't have time to re-tune the system, but i have a lot of faith in the end result.
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