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Re: SLA Pro driver question
Posted: Thu Jul 09, 2015 9:19 pm
by kkip
kenkenni wrote:Thanks David for your input. I already have the plans. I am filling up and saving electronic shopping carts up of the things I will need to save time
until I purchase the wood in a week. I have the speakers and tweeters already. I think I'll go ahead and cut , glue , and wire up the tweeters for
the time being. I like how the grills fit on some of the SLA builds I've seen so I was asking if any who bought them at Reliable Hardware can tell
me the dimensions and folds they purchased, as I was going to go ahead and order those items so they would be here and ready. It's no biggie though
I will just measure if I have to. Thanks again! I do plan to post some pics of my progress also so stay tuned.
Speaking of SLA Pro grills, check out DanielNY's wrap around grill design:
http://billfitzmaurice.info/forum/viewt ... 30&t=17796
Pretty slick huh?
An alternative to Reliable Hardware for your grills is ebay seller spkrparts!-2007 (Pro Speaker Parts). He will custom make any size you want. Just send him a message. I have been very happy with the OT12 grills he custom make for me. Here is one of his standard size grills;
http://www.ebay.com/itm/Pair-12-x18-x-1 ... 3cb88490f2.
Re: SLA Pro driver question
Posted: Fri Jul 10, 2015 4:31 am
by Grant Bunter
kenkenni wrote:To Mr. Grant. I bought the recommended drivers in the plans. To be exact, the Alpha 6As and the Goldwood tweeters.
Cool.
My (older) plans for the SLA pro say the following:
Piezo arrays do not require a high-pass filter, but a filter will improve their performance. This filter has a 3.5kHz corner frequency, reducing power to the piezos by 12dB (90%) at 1.8kHz.
Re: SLA Pro driver question
Posted: Fri Jul 10, 2015 1:01 pm
by kenkenni
Grant the plans I have doesn't mention a 3.5kHz anywhere. The only info I got was in the section of the plans for the non-pro SLA and it
recommended a 4000 kHz cross-over. Even the updated plans don't specifically mention the type even though there is a pretty detailed
description of the components. Since I'm not an electronics expert I don't know what type it is. I just want to make sure I purchase the
exact cross-over required when it is time.
Re: SLA Pro driver question
Posted: Fri Jul 10, 2015 1:17 pm
by Stratispho
kenkenni wrote:Grant the plans I have doesn't mention a 3.5kHz anywhere. The only info I got was in the section of the plans for the non-pro SLA and it
recommended a 4000 kHz cross-over. Even the updated plans don't specifically mention the type even though there is a pretty detailed
description of the components. Since I'm not an electronics expert I don't know what type it is. I just want to make sure I purchase the
exact cross-over required when it is time.
You can get the correct parts here, and then build it yourself.
http://www.speakerhardware.com/35k-piez ... filter.php
Or, you can figure it out from scratch
http://speakeressentials.com/pages/cros ... to-sla-pro
Re: SLA Pro driver question
Posted: Fri Jul 10, 2015 1:24 pm
by Bill Fitzmaurice
kenkenni wrote:I just want to make sure I purchase the
exact cross-over required when it is time.
If it's not specifically designed for the SLA Pro it won't work. The only place that sells a completed SLA Pro high pass filter is speakerhardware.com.
Re: SLA Pro driver question
Posted: Fri Jul 10, 2015 2:27 pm
by kenkenni
Thanks for those links everyone especially to speakeressentials. They go into a little more detail than the plans. Seems the recommended cross-over
is a 3.5kHz. Thanks again I'm a little more prepared now.
Mr. Stratispho thanks for that direct link to the parts. I'm still a little sloppy with the soldering which is why I am trying to have
a backup plan. I most likely will purchase the parts for the 2x6 SLA as I plan on doing both versions.
Re: SLA Pro driver question
Posted: Fri Jul 10, 2015 2:33 pm
by Stratispho
Keep in mind that the 3.5kHz was for those specific speakers in that specific configuration. If you're not using the recommended speakers your crossover point will be different.
Re: SLA Pro driver question
Posted: Fri Jul 10, 2015 2:43 pm
by kenkenni
Stratispho. I will be using the correct drivers as called for in the plans. I am thankful for all the input you guys are giving me.
Re: SLA Pro driver question
Posted: Tue Jul 14, 2015 9:29 pm
by kenkenni
Am I correct in thinking that the 2x6 version uses the same cross-over components as the 4x6?
I'm ordering the components in a couple of days.
Re: SLA Pro driver question
Posted: Tue Jul 14, 2015 10:07 pm
by Grant Bunter
kenkenni wrote:Am I correct in thinking that the 2x6 version uses the same cross-over components as the 4x6?
I'm ordering the components in a couple of days.
The crossover point is the same in each cab.
Tell Leland you're building both 4x6, and 2x6, in case impedance changes some of the component values...
Re: SLA Pro driver question
Posted: Tue Jul 14, 2015 10:47 pm
by kenkenni
Thanks Grant. Also here are Just A couple of pre-build pics for you guys
Dammit FedEx! Noticed the gaps on the side in these two. Will this affect it's performance? I bought these Goldwoods from Parts Express since I already had items in my cart there.
Re: SLA Pro driver question
Posted: Thu Jul 16, 2015 9:18 pm
by kenkenni
I managed to get this much done this evening. Did not have much daylight time left so I did this in about
2 hours. I outlined and marked the woofer and tweeter holes Then took a hole cutter and drill to the tweeter
cut-outs. I then took my oscillating tool you see in the pic, attached a plunge cut blade, and cut out the
rectangle area around the tweeter. The woofers were routed with my router and Jasper Jig circle cutter.
I did both baffles at the same time which went very well as I began to run out of daylight. Here is the result.
Re: SLA Pro driver question
Posted: Fri Jul 17, 2015 9:18 pm
by kenkenni
Can anyone tell me if the small gaps in the tweeters in the above pic will affect performance. I want know in
case I have to order some extras.
Re: SLA Pro driver question
Posted: Sat Jul 18, 2015 12:50 am
by Tom Smit
Since the cab is not a sealed one, the gaps don't affect performance.
Re: SLA Pro driver question
Posted: Sat Jul 18, 2015 3:06 pm
by kenkenni
Okay! that's what I was hoping. Thanks
