+ Reply to Thread
Results 1 to 15 of 27

Thread: Altec A7 refurbish

Hybrid View

  1. #1
    Senior Member sbjacob's Avatar
    Join Date
    Mar 2009
    Location
    So. California
    Posts
    187

    Altec A7 refurbish

    I pick up a few A7 cabinets in good condition and have repainted them I took the small crossover cover off the back and went to Ace and they scanned it to match the paint worked very nice I also ordered new logos off Ebay for them very nice for $18. for 4 . I have a pair of 511B horns and 909-16 drivers just need woofers I had a pair of Eminence Kappa C so I put them in just for kicks and used a Ashly XR1001 active with a BGW 750C on the LF and a BGW 250D on the HF had to turn the HF gain way down as it was over powering the LF any suggestions on woofers is the 416 the way to go on these?Name:  IMG_0480.jpg
Views: 3212
Size:  157.2 KB

    I went to GPA website and noticed the 515 LF specs are close to the Kappa C 4 ohm Vas is 11.7 vs 16.6 the Qes .25 vs .26 Qts .25 vs .25 Qms 10.14 vs 11.6 FS 31Hz vs 27Hz

  2. #2
    Member
    Join Date
    May 2007
    Location
    Bakersfield, CA
    Posts
    80
    Nice looking cab!

    I have a pair that I am running new GPA 416-8Cs in the same 828 cabinet as yours. I really like the way they sound. I use them every day as the heart of my reference home theater system. Here is a plot of their frequency response before and after EQ. In this case the EQ happened to be Dirac Live running in a Datasat RS20i but similar results can be realized by using other systems as well.

    Name:  ALTEC_V3.jpg
Views: 2113
Size:  46.5 KB

    The 515 from GPA is very similar to the 416. The 515 trades off a little on the bottom for a little more efficiency.
    _____________
    Best Regards,
    Carl Huff

  3. #3
    Senior Member louped garouv's Avatar
    Join Date
    Jun 2004
    Location
    formerly "the city where imagination takes precedence over fact"
    Posts
    2,148
    For Altec choices, 416 will have a fuller low end...
    But some contend the 515s midrange is a fair tradeoff......

    Some folks even will run JBLs or TADs or whatever, sometimes with some gasket considerations/ modifications...

    I liked the 515b with some reflex subs best... (I was using four sets of EAW SB48s for low end)

  4. #4
    Senior Member sbjacob's Avatar
    Join Date
    Mar 2009
    Location
    So. California
    Posts
    187
    Quote Originally Posted by louped garouv View Post
    For Altec choices, 416 will have a fuller low end...
    But some contend the 515s midrange is a fair tradeoff......

    Some folks even will run JBLs or TADs or whatever, sometimes with some gasket considerations/ modifications...

    I liked the 515b with some reflex subs best... (I was using four sets of EAW SB48s for low end)

    I talked to GPA the they did recommend the 515's in bass horn enclosures however I pretty happy with the Eminence Kappa C's but then again I have nothing to compare them with. The specs are similar to the 515's so I'm not sure I'm using a Ashly active XR1001 and added a JBL 2404 and built a 4th order passive for it.

  5. #5
    Senior Member sbjacob's Avatar
    Join Date
    Mar 2009
    Location
    So. California
    Posts
    187
    Name:  IMG_0487.jpg
Views: 1991
Size:  147.7 KB
    Quote Originally Posted by sbjacob View Post
    I talked to GPA the they did recommend the 515's in bass horn enclosures however I pretty happy with the Eminence Kappa C's but then again I have nothing to compare them with. The specs are similar to the 515's so I'm not sure I'm using a Ashly active XR1001 and added a JBL 2404 and built a 4th order passive for it.
    I finished one today sounds very nice I may add the JBL 2404 tweeter later

  6. #6
    Senior Member Lee in Montreal's Avatar
    Join Date
    Sep 2010
    Location
    Montréal
    Posts
    1,880
    Nice work.

  7. #7
    Member
    Join Date
    Jan 2012
    Location
    uk
    Posts
    37
    Quote Originally Posted by sbjacob View Post
    Attachment 56043

    I finished one today sounds very nice I may add the JBL 2404 tweeter later

    Hey, they are nice... I have some with 515's in and JBL2440/JBL2395 lens horns... the tweeter is essential in my opinion i have tried JBL2405 and JBL2402 - i prefer the former.

    I run BGW 250 on the mids
    BGW GTA on the 15's
    CROWN D75 on the tweeters

    and you're right, there's no way that bass is gonna keep up with the mids!

    I have also tried altec 421-8LF in the A7 - that's nice too.
    I did look at the 416 and it's not enough power handling for what i want - and it won't help keep up with the mids
    I have some TAD 1601b's to go in the A7 they sound amazing and much more energy in the lower end, but i can't turn them up loud yet because of gasket considerations!

    Also would you be using a sub with the A7's?

    Tom

  8. #8
    Member
    Join Date
    Jan 2012
    Location
    uk
    Posts
    37
    Quote Originally Posted by louped garouv View Post
    For Altec choices, 416 will have a fuller low end...
    But some contend the 515s midrange is a fair tradeoff......

    Some folks even will run JBLs or TADs or whatever, sometimes with some gasket considerations/ modifications...

    I liked the 515b with some reflex subs best... (I was using four sets of EAW SB48s for low end)
    hey, i was just wondering how you crossed over your subs and at what frequency?
    do you have them as additional to the 515's low end, or is there a HPF on the 515's?
    I made 4 LAB Subs and also 4 Tuba 30's (not my pics) which are a bit impractical actually, but go very low and smooth.

    tom

  9. #9
    Senior Member sbjacob's Avatar
    Join Date
    Mar 2009
    Location
    So. California
    Posts
    187
    Quote Originally Posted by teddy.edwards1 View Post
    hey, i was just wondering how you crossed over your subs and at what frequency?
    do you have them as additional to the 515's low end, or is there a HPF on the 515's?
    I made 4 LAB Subs and also 4 Tuba 30's (not my pics) which are a bit impractical actually, but go very low and smooth.

    tom
    Hi I'm pleased with the sound I haven't hooked up any subs yet I have 4 Bose 302 bandpass subs not real good but I use them on small gigs with 802-II's it's a nice portable system. I was looking at the Danley DTS-10 sub they sell kits for around $1200 and have talked to some that have them and they are very happy "True Thunder" was what was said to me by a fellow Forum member.I tlked to GPA and the recomended there 515-G8 woofer for the A7 but I'm using the Eminence Kappa C's very similar specs to the GPA 515-G8. The Kappa C specs on the Eminence website are the same as the 8 ohm Kappa A's not correct Parts Express has the correct specs not alot of difference . http://www.danleysoundlabs.com/produ...y-subs/dts-10/

  10. #10
    Senior Member louped garouv's Avatar
    Join Date
    Jun 2004
    Location
    formerly "the city where imagination takes precedence over fact"
    Posts
    2,148
    Quote Originally Posted by teddy.edwards1 View Post
    hey, i was just wondering how you crossed over your subs and at what frequency?
    do you have them as additional to the 515's low end, or is there a HPF on the 515's?
    I made 4 LAB Subs and also 4 Tuba 30's (not my pics) which are a bit impractical actually, but go very low and smooth.

    tom
    Hi Tom,
    At the time, I was using an RLA x2000 xover..

    The 515s were 25hz to 800hz
    Subs ran 20hz to 100hz

  11. #11
    Senior Member sbjacob's Avatar
    Join Date
    Mar 2009
    Location
    So. California
    Posts
    187
    Quote Originally Posted by louped garouv View Post
    Hi Tom,
    At the time, I was using an RLA x2000 xover..

    The 515s were 25hz to 800hz

    Subs ran 20hz to 100hz
    Any one add fuses to the 2404 tweeters if so how large I'm crossing my 2404's at 6000Hz 4th order Linkwitz passive? Thanks

  12. #12
    Senior Member vernb's Avatar
    Join Date
    Sep 2006
    Location
    Denmark
    Posts
    281
    Quote Originally Posted by sbjacob View Post
    I pick up a few A7 cabinets in good condition and have repainted them I took the small crossover cover off the back and went to Ace and they scanned it to match the paint worked very nice I also ordered new logos off Ebay for them very nice for $18. for 4 . I have a pair of 511B horns and 909-16 drivers just need woofers I had a pair of Eminence Kappa C so I put them in just for kicks and used a Ashly XR1001 active with a BGW 750C on the LF and a BGW 250D on the HF had to turn the HF gain way down as it was over powering the LF any suggestions on woofers is the 416 the way to go on these
    I went to GPA website and noticed the 515 LF specs are close to the Kappa C 4 ohm Vas is 11.7 vs 16.6 the Qes .25 vs .26 Qts .25 vs .25 Qms 10.14 vs 11.6 FS 31Hz vs 27Hz
    Very nice job. I just got myselt a pair yesterday, but they need a paintjob aswell. Which is the right Altec grey for VOTT?
    Best regards
    Vern

  13. #13
    Senior Member sbjacob's Avatar
    Join Date
    Mar 2009
    Location
    So. California
    Posts
    187
    Quote Originally Posted by vernb View Post
    Very nice job. I just got myselt a pair yesterday, but they need a paintjob aswell. Which is the right Altec grey for VOTT?Best regardsVern
    Hi I went to Ace and they scanned the crossover panel cover to match the paint and mixed up some for me a perfect match. Anyway I have just finished putting internal bracing in the cabinets and I'm pleased to say the bass is much tighter. I tied the two bottom sides together with a 2"x4" and added acoustic foam on the top horns space also added another 3/4" board to the back of the ports to stiffen them up honestly these cabinets stock are lacking.I also took the old grey cloth out and replaced it with new black Duracrest cloth.Name:  IMG_0540.jpg
Views: 627
Size:  160.4 KB

+ Reply to Thread

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Altec 508A vs Altec Model 8 series II Help Please !
    By jgscott in forum Lansing Product General Information
    Replies: 2
    Last Post: 07-28-2010, 06:01 PM
  2. 4410 refurbish project
    By tensleep in forum Lansing Product DIY Forum
    Replies: 21
    Last Post: 02-08-2009, 05:27 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts